/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_vector_difference_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:05:29,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:05:29,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:05:29,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-01-06 10:05:29,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:05:29,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:05:29,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:05:29,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:05:29,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:05:29,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:05:29,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:05:29,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:05:29,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:05:29,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:05:29,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:05:29,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:05:29,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:05:29,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:05:29,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:05:29,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:05:29,413 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 10:05:29,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:05:29,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:05:29,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:05:29,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:05:29,467 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:05:29,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:05:29,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:05:29,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:05:29,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:05:29,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:05:29,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:05:29,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:05:29,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:05:29,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:05:29,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:05:29,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:05:29,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:05:29,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:05:29,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:05:29,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:05:29,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:05:29,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:05:29,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:05:29,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:05:29,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:05:29,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:05:29,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:05:30,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:05:30,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:05:30,051 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:05:30,052 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:05:30,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_vector_difference_ground.i [2021-01-06 10:05:30,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0a6e53e93/7f7868b049d448c29a62949839b4994f/FLAG640a5b923 [2021-01-06 10:05:30,863 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:05:30,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_vector_difference_ground.i [2021-01-06 10:05:30,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0a6e53e93/7f7868b049d448c29a62949839b4994f/FLAG640a5b923 [2021-01-06 10:05:31,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0a6e53e93/7f7868b049d448c29a62949839b4994f [2021-01-06 10:05:31,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:05:31,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:05:31,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:05:31,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:05:31,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:05:31,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:05:31" (1/1) ... [2021-01-06 10:05:31,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12016146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:31, skipping insertion in model container [2021-01-06 10:05:31,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:05:31" (1/1) ... [2021-01-06 10:05:31,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:05:31,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:05:31,374 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_vector_difference_ground.i[826,839] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] 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: ArrayLHS[VariableLHS[~c~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 10:05:31,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:05:31,409 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:05:31,423 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_vector_difference_ground.i[826,839] 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[~i~0,]]]]] 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: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#c~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#c~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[~x~0,] [2021-01-06 10:05:31,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:05:31,456 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:05:31,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:31 WrapperNode [2021-01-06 10:05:31,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:05:31,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:05:31,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:05:31,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:05:31,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:31" (1/1) ... [2021-01-06 10:05:31,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:31" (1/1) ... [2021-01-06 10:05:31,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:05:31,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:05:31,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:05:31,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:05:31,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:31" (1/1) ... [2021-01-06 10:05:31,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:31" (1/1) ... [2021-01-06 10:05:31,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:31" (1/1) ... [2021-01-06 10:05:31,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:31" (1/1) ... [2021-01-06 10:05:31,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:31" (1/1) ... [2021-01-06 10:05:31,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:31" (1/1) ... [2021-01-06 10:05:31,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:31" (1/1) ... [2021-01-06 10:05:31,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:05:31,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:05:31,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:05:31,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:05:31,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:31" (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 10:05:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:05:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:05:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:05:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:05:31,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:05:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:05:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:05:32,158 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:05:32,158 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 10:05:32,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:05:32 BoogieIcfgContainer [2021-01-06 10:05:32,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:05:32,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:05:32,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:05:32,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:05:32,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:05:31" (1/3) ... [2021-01-06 10:05:32,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b7106e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:05:32, skipping insertion in model container [2021-01-06 10:05:32,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:31" (2/3) ... [2021-01-06 10:05:32,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b7106e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:05:32, skipping insertion in model container [2021-01-06 10:05:32,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:05:32" (3/3) ... [2021-01-06 10:05:32,191 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_vector_difference_ground.i [2021-01-06 10:05:32,208 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:05:32,219 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:05:32,242 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:05:32,295 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:05:32,297 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:05:32,297 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:05:32,297 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:05:32,298 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:05:32,298 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:05:32,298 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:05:32,298 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:05:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 10:05:32,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:05:32,330 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:32,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:32,332 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:32,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2015557098, now seen corresponding path program 1 times [2021-01-06 10:05:32,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:32,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48259297] [2021-01-06 10:05:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:32,648 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 10:05:32,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48259297] [2021-01-06 10:05:32,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:05:32,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:05:32,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117566950] [2021-01-06 10:05:32,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:05:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:32,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:05:32,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:05:32,687 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2021-01-06 10:05:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:32,789 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2021-01-06 10:05:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:05:32,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 10:05:32,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:32,816 INFO L225 Difference]: With dead ends: 33 [2021-01-06 10:05:32,816 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 10:05:32,820 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 10:05:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 10:05:32,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-01-06 10:05:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 10:05:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-01-06 10:05:32,863 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-01-06 10:05:32,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:32,864 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-01-06 10:05:32,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:05:32,864 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-01-06 10:05:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:05:32,866 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:32,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:32,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:05:32,867 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:32,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1338517781, now seen corresponding path program 1 times [2021-01-06 10:05:32,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:32,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826323292] [2021-01-06 10:05:32,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:33,010 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 10:05:33,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826323292] [2021-01-06 10:05:33,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710532595] [2021-01-06 10:05:33,011 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 10:05:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:33,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:05:33,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:33,168 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 10:05:33,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:33,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:05:33,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462914712] [2021-01-06 10:05:33,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:05:33,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:33,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:05:33,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:05:33,172 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2021-01-06 10:05:33,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:33,232 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-01-06 10:05:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:05:33,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 10:05:33,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:33,233 INFO L225 Difference]: With dead ends: 29 [2021-01-06 10:05:33,233 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 10:05:33,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 10:05:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 10:05:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-01-06 10:05:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:05:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-01-06 10:05:33,240 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2021-01-06 10:05:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:33,240 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-01-06 10:05:33,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:05:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-01-06 10:05:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:05:33,241 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:33,241 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:33,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:05:33,457 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:33,459 INFO L82 PathProgramCache]: Analyzing trace with hash 231525810, now seen corresponding path program 2 times [2021-01-06 10:05:33,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:33,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104862779] [2021-01-06 10:05:33,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:05:33,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104862779] [2021-01-06 10:05:33,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607328812] [2021-01-06 10:05:33,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:33,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:05:33,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:33,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:05:33,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:05:33,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:33,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:05:33,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240549170] [2021-01-06 10:05:33,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:05:33,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:33,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:05:33,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:05:33,724 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2021-01-06 10:05:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:33,802 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-01-06 10:05:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:05:33,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 10:05:33,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:33,806 INFO L225 Difference]: With dead ends: 33 [2021-01-06 10:05:33,806 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 10:05:33,809 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 10:05:33,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 10:05:33,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-01-06 10:05:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 10:05:33,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-01-06 10:05:33,816 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2021-01-06 10:05:33,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:33,817 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-01-06 10:05:33,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:05:33,817 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-01-06 10:05:33,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 10:05:33,818 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:33,818 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:34,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:34,032 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:34,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:34,034 INFO L82 PathProgramCache]: Analyzing trace with hash 527921017, now seen corresponding path program 3 times [2021-01-06 10:05:34,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:34,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861923034] [2021-01-06 10:05:34,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 10:05:34,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861923034] [2021-01-06 10:05:34,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872575137] [2021-01-06 10:05:34,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:34,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:05:34,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:34,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:05:34,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:05:34,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:34,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:05:34,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841468889] [2021-01-06 10:05:34,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:05:34,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:34,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:05:34,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:05:34,252 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2021-01-06 10:05:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:34,298 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-01-06 10:05:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:05:34,299 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2021-01-06 10:05:34,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:34,300 INFO L225 Difference]: With dead ends: 37 [2021-01-06 10:05:34,300 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 10:05:34,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:05:34,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 10:05:34,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-01-06 10:05:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:05:34,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 10:05:34,306 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2021-01-06 10:05:34,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:34,307 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 10:05:34,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:05:34,307 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 10:05:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:05:34,308 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:34,308 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:34,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:34,523 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:34,525 INFO L82 PathProgramCache]: Analyzing trace with hash -150327986, now seen corresponding path program 4 times [2021-01-06 10:05:34,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:34,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674722238] [2021-01-06 10:05:34,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:05:34,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674722238] [2021-01-06 10:05:34,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817649240] [2021-01-06 10:05:34,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:34,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:05:34,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:34,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:05:34,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:05:34,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:34,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 10:05:34,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986453732] [2021-01-06 10:05:34,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:05:34,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:34,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:05:34,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:05:34,831 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2021-01-06 10:05:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:34,883 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-01-06 10:05:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:05:34,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-01-06 10:05:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:34,885 INFO L225 Difference]: With dead ends: 41 [2021-01-06 10:05:34,885 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 10:05:34,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:05:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 10:05:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-01-06 10:05:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:05:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-01-06 10:05:34,892 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2021-01-06 10:05:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:34,893 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-01-06 10:05:34,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:05:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-01-06 10:05:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 10:05:34,894 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:34,895 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:35,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:35,109 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:35,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2061613533, now seen corresponding path program 5 times [2021-01-06 10:05:35,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:35,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127404079] [2021-01-06 10:05:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 10:05:35,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127404079] [2021-01-06 10:05:35,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987361751] [2021-01-06 10:05:35,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:35,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 10:05:35,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:35,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:05:35,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 10:05:35,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:35,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:05:35,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048713085] [2021-01-06 10:05:35,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:05:35,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:35,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:05:35,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:05:35,561 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2021-01-06 10:05:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:35,636 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-01-06 10:05:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:05:35,638 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2021-01-06 10:05:35,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:35,639 INFO L225 Difference]: With dead ends: 45 [2021-01-06 10:05:35,640 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:05:35,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 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 10:05:35,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:05:35,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 10:05:35,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:05:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 10:05:35,662 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2021-01-06 10:05:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:35,662 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 10:05:35,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:05:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 10:05:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:05:35,664 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:35,665 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:35,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:05:35,880 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:35,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:35,881 INFO L82 PathProgramCache]: Analyzing trace with hash -654055190, now seen corresponding path program 6 times [2021-01-06 10:05:35,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:35,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747396838] [2021-01-06 10:05:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 10:05:35,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747396838] [2021-01-06 10:05:35,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412037642] [2021-01-06 10:05:35,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:36,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:05:36,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:36,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:05:36,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:05:36,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:36,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:05:36,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9530164] [2021-01-06 10:05:36,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:05:36,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:05:36,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:05:36,455 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2021-01-06 10:05:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:36,539 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-01-06 10:05:36,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:05:36,540 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2021-01-06 10:05:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:36,540 INFO L225 Difference]: With dead ends: 49 [2021-01-06 10:05:36,541 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 10:05:36,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:05:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 10:05:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-01-06 10:05:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:05:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-01-06 10:05:36,546 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2021-01-06 10:05:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:36,547 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-01-06 10:05:36,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:05:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-01-06 10:05:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:05:36,548 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:36,548 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:36,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:36,762 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:36,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:36,763 INFO L82 PathProgramCache]: Analyzing trace with hash 773343297, now seen corresponding path program 7 times [2021-01-06 10:05:36,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:36,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082307737] [2021-01-06 10:05:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 10:05:36,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082307737] [2021-01-06 10:05:36,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742273622] [2021-01-06 10:05:36,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:36,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:05:36,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 10:05:37,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:37,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:05:37,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553840407] [2021-01-06 10:05:37,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:05:37,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:37,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:05:37,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:05:37,019 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2021-01-06 10:05:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:37,100 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-01-06 10:05:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:05:37,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2021-01-06 10:05:37,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:37,101 INFO L225 Difference]: With dead ends: 53 [2021-01-06 10:05:37,101 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 10:05:37,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:05:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 10:05:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-01-06 10:05:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:05:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-01-06 10:05:37,108 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2021-01-06 10:05:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:37,108 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-01-06 10:05:37,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:05:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-01-06 10:05:37,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 10:05:37,109 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:37,110 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:37,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:37,311 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:37,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:37,312 INFO L82 PathProgramCache]: Analyzing trace with hash 891863174, now seen corresponding path program 8 times [2021-01-06 10:05:37,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:37,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843481758] [2021-01-06 10:05:37,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:05:37,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843481758] [2021-01-06 10:05:37,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427532007] [2021-01-06 10:05:37,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:37,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:05:37,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:37,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:05:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:05:37,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:37,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:05:37,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515500025] [2021-01-06 10:05:37,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:05:37,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:37,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:05:37,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:05:37,641 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2021-01-06 10:05:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:37,721 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-01-06 10:05:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:05:37,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2021-01-06 10:05:37,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:37,722 INFO L225 Difference]: With dead ends: 57 [2021-01-06 10:05:37,722 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 10:05:37,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 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 10:05:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 10:05:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-01-06 10:05:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:05:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-01-06 10:05:37,729 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2021-01-06 10:05:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:37,729 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-01-06 10:05:37,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:05:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-01-06 10:05:37,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 10:05:37,730 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:37,730 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:37,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:05:37,945 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:37,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash 992762533, now seen corresponding path program 9 times [2021-01-06 10:05:37,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:37,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757554705] [2021-01-06 10:05:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:05:38,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757554705] [2021-01-06 10:05:38,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980769486] [2021-01-06 10:05:38,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:38,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:05:38,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:38,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:05:38,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 10:05:38,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:38,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:05:38,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485229133] [2021-01-06 10:05:38,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:05:38,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:38,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:05:38,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:05:38,492 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 13 states. [2021-01-06 10:05:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:38,592 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-01-06 10:05:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:05:38,594 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2021-01-06 10:05:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:38,595 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:05:38,595 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 10:05:38,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:05:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 10:05:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-01-06 10:05:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 10:05:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-01-06 10:05:38,601 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 36 [2021-01-06 10:05:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:38,602 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-01-06 10:05:38,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:05:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-01-06 10:05:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 10:05:38,603 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:38,603 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:38,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:38,817 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:38,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash 887583778, now seen corresponding path program 10 times [2021-01-06 10:05:38,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:38,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578429285] [2021-01-06 10:05:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 10:05:38,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578429285] [2021-01-06 10:05:38,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268163712] [2021-01-06 10:05:38,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:39,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:05:39,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:39,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:05:39,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 10:05:39,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:39,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:05:39,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822452363] [2021-01-06 10:05:39,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:05:39,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:39,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:05:39,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:05:39,218 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 14 states. [2021-01-06 10:05:39,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:39,318 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-01-06 10:05:39,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:05:39,319 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2021-01-06 10:05:39,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:39,323 INFO L225 Difference]: With dead ends: 65 [2021-01-06 10:05:39,323 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 10:05:39,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:05:39,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 10:05:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-01-06 10:05:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 10:05:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-01-06 10:05:39,350 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2021-01-06 10:05:39,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:39,354 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-01-06 10:05:39,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:05:39,354 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-01-06 10:05:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:05:39,355 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:39,355 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:39,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:39,556 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:39,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:39,560 INFO L82 PathProgramCache]: Analyzing trace with hash 506409225, now seen corresponding path program 11 times [2021-01-06 10:05:39,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:39,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948065968] [2021-01-06 10:05:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 10:05:39,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948065968] [2021-01-06 10:05:39,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089425735] [2021-01-06 10:05:39,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:03,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 10:06:03,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:03,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:06:03,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 10:06:03,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:03,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 10:06:03,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372174916] [2021-01-06 10:06:03,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:06:03,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:03,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:06:03,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:06:03,502 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 15 states. [2021-01-06 10:06:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:03,598 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-01-06 10:06:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:06:03,599 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2021-01-06 10:06:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:03,603 INFO L225 Difference]: With dead ends: 69 [2021-01-06 10:06:03,603 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 10:06:03,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 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 10:06:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 10:06:03,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-01-06 10:06:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:06:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-01-06 10:06:03,621 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 42 [2021-01-06 10:06:03,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:03,621 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-01-06 10:06:03,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:06:03,622 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-01-06 10:06:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:06:03,623 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:03,623 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:03,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:06:03,838 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:03,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1705952190, now seen corresponding path program 12 times [2021-01-06 10:06:03,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:03,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090543224] [2021-01-06 10:06:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 10:06:04,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090543224] [2021-01-06 10:06:04,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989465240] [2021-01-06 10:06:04,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:10,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:06:10,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:10,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:06:10,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 23 proven. 78 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 10:06:10,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:10,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 18 [2021-01-06 10:06:10,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378164535] [2021-01-06 10:06:10,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:06:10,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:10,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:06:10,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:06:10,697 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 18 states. [2021-01-06 10:06:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:10,798 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-01-06 10:06:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:06:10,799 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2021-01-06 10:06:10,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:10,799 INFO L225 Difference]: With dead ends: 75 [2021-01-06 10:06:10,800 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 10:06:10,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 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 10:06:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 10:06:10,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-01-06 10:06:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:06:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-01-06 10:06:10,806 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 45 [2021-01-06 10:06:10,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:10,806 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-01-06 10:06:10,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:06:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-01-06 10:06:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:06:10,807 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:10,808 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:11,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:06:11,022 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:11,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1961717594, now seen corresponding path program 13 times [2021-01-06 10:06:11,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:11,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693451421] [2021-01-06 10:06:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 10:06:11,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693451421] [2021-01-06 10:06:11,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805705323] [2021-01-06 10:06:11,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:11,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:06:11,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 10:06:11,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:11,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 10:06:11,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764902701] [2021-01-06 10:06:11,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:06:11,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:11,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:06:11,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:06:11,438 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 18 states. [2021-01-06 10:06:11,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:11,561 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-01-06 10:06:11,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:06:11,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2021-01-06 10:06:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:11,563 INFO L225 Difference]: With dead ends: 81 [2021-01-06 10:06:11,563 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 10:06:11,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 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 10:06:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 10:06:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-01-06 10:06:11,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 10:06:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-01-06 10:06:11,569 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2021-01-06 10:06:11,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:11,569 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-01-06 10:06:11,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:06:11,570 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-01-06 10:06:11,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 10:06:11,571 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:11,571 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:11,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:06:11,786 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:11,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:11,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1346775505, now seen corresponding path program 14 times [2021-01-06 10:06:11,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:11,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844961278] [2021-01-06 10:06:11,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-01-06 10:06:12,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844961278] [2021-01-06 10:06:12,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644558024] [2021-01-06 10:06:12,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:12,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:06:12,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:12,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:06:12,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-01-06 10:06:12,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:12,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:06:12,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380752055] [2021-01-06 10:06:12,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:06:12,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:12,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:06:12,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:06:12,231 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 19 states. [2021-01-06 10:06:12,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:12,358 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-01-06 10:06:12,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:06:12,359 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2021-01-06 10:06:12,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:12,360 INFO L225 Difference]: With dead ends: 85 [2021-01-06 10:06:12,360 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 10:06:12,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:06:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 10:06:12,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-01-06 10:06:12,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 10:06:12,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-01-06 10:06:12,366 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 54 [2021-01-06 10:06:12,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:12,367 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-01-06 10:06:12,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:06:12,367 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-01-06 10:06:12,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 10:06:12,368 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:12,368 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:12,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:12,582 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:12,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:12,583 INFO L82 PathProgramCache]: Analyzing trace with hash -334350602, now seen corresponding path program 15 times [2021-01-06 10:06:12,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:12,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768028205] [2021-01-06 10:06:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-01-06 10:06:12,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768028205] [2021-01-06 10:06:12,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226005158] [2021-01-06 10:06:12,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:16,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 10:06:16,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:16,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:06:16,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:06:16,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:16,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:06:16,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874617701] [2021-01-06 10:06:16,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:06:16,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:16,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:06:16,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:06:16,415 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 20 states. [2021-01-06 10:06:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:16,524 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-01-06 10:06:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:06:16,524 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2021-01-06 10:06:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:16,525 INFO L225 Difference]: With dead ends: 89 [2021-01-06 10:06:16,525 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 10:06:16,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:06:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 10:06:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-01-06 10:06:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:06:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-01-06 10:06:16,532 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2021-01-06 10:06:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:16,532 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-01-06 10:06:16,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:06:16,533 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-01-06 10:06:16,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 10:06:16,533 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:16,534 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:16,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:06:16,748 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:16,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1568459829, now seen corresponding path program 16 times [2021-01-06 10:06:16,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:16,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653696345] [2021-01-06 10:06:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-01-06 10:06:17,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653696345] [2021-01-06 10:06:17,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733916046] [2021-01-06 10:06:17,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:17,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:06:17,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:17,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:06:17,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-01-06 10:06:17,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:17,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 10:06:17,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268751901] [2021-01-06 10:06:17,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:06:17,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:17,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:06:17,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:06:17,250 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 21 states. [2021-01-06 10:06:17,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:17,390 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-01-06 10:06:17,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:06:17,391 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2021-01-06 10:06:17,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:17,392 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:06:17,392 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 10:06:17,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:06:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 10:06:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-01-06 10:06:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:06:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-01-06 10:06:17,399 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 60 [2021-01-06 10:06:17,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:17,399 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-01-06 10:06:17,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:06:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-01-06 10:06:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:06:17,400 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:17,400 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:17,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:06:17,615 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:17,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:17,616 INFO L82 PathProgramCache]: Analyzing trace with hash -326378862, now seen corresponding path program 17 times [2021-01-06 10:06:17,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:17,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053060837] [2021-01-06 10:06:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-01-06 10:06:17,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053060837] [2021-01-06 10:06:17,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255820689] [2021-01-06 10:06:17,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true