/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_init1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:58:03,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:58:03,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:58:03,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:58:03,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:58:03,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:58:03,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:58:03,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:58:03,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:58:03,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:58:03,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:58:03,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:58:03,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:58:03,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:58:03,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:58:03,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:58:03,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:58:03,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:58:03,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:58:03,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:58:03,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:58:03,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:58:03,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:58:03,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:58:03,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:58:03,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:58:03,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:58:03,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:58:03,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:58:03,655 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:58:03,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:58:03,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:58:03,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:58:03,661 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:58:03,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:58:03,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:58:03,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:58:03,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:58:03,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:58:03,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:58:03,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:58:03,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:58:03,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:58:03,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:58:03,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:58:03,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:58:03,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:58:03,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:58:03,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:58:03,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:58:03,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:58:03,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:58:03,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:58:03,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:58:03,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:58:04,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:58:04,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:58:04,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:58:04,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:58:04,176 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:58:04,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init1_ground-1.i [2020-12-22 23:58:04,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bbf6061ab/0d806bc8aa4a4d60903ec753fa53e9c6/FLAGf0e4620cd [2020-12-22 23:58:04,890 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:58:04,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init1_ground-1.i [2020-12-22 23:58:04,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bbf6061ab/0d806bc8aa4a4d60903ec753fa53e9c6/FLAGf0e4620cd [2020-12-22 23:58:05,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bbf6061ab/0d806bc8aa4a4d60903ec753fa53e9c6 [2020-12-22 23:58:05,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:58:05,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:58:05,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:58:05,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:58:05,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:58:05,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:58:05" (1/1) ... [2020-12-22 23:58:05,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a95a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:58:05, skipping insertion in model container [2020-12-22 23:58:05,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:58:05" (1/1) ... [2020-12-22 23:58:05,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:58:05,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:58:05,512 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_init1_ground-1.i[816,829] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:58:05,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:58:05,541 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:58:05,558 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_init1_ground-1.i[816,829] 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: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:58:05,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:58:05,582 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:58:05,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:58:05 WrapperNode [2020-12-22 23:58:05,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:58:05,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:58:05,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:58:05,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:58:05,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:58:05" (1/1) ... [2020-12-22 23:58:05,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:58:05" (1/1) ... [2020-12-22 23:58:05,626 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:58:05,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:58:05,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:58:05,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:58:05,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:58:05" (1/1) ... [2020-12-22 23:58:05,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:58:05" (1/1) ... [2020-12-22 23:58:05,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:58:05" (1/1) ... [2020-12-22 23:58:05,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:58:05" (1/1) ... [2020-12-22 23:58:05,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:58:05" (1/1) ... [2020-12-22 23:58:05,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:58:05" (1/1) ... [2020-12-22 23:58:05,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:58:05" (1/1) ... [2020-12-22 23:58:05,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:58:05,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:58:05,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:58:05,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:58:05,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:58:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:58:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:58:05,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:58:05,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:58:05,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:58:05,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:58:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:58:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:58:06,039 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:58:06,040 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 23:58:06,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:58:06 BoogieIcfgContainer [2020-12-22 23:58:06,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:58:06,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:58:06,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:58:06,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:58:06,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:58:05" (1/3) ... [2020-12-22 23:58:06,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc032f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:58:06, skipping insertion in model container [2020-12-22 23:58:06,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:58:05" (2/3) ... [2020-12-22 23:58:06,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc032f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:58:06, skipping insertion in model container [2020-12-22 23:58:06,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:58:06" (3/3) ... [2020-12-22 23:58:06,064 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-1.i [2020-12-22 23:58:06,083 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:58:06,094 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 23:58:06,133 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 23:58:06,163 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:58:06,164 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:58:06,164 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:58:06,164 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:58:06,164 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:58:06,164 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:58:06,165 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:58:06,165 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:58:06,180 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-22 23:58:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 23:58:06,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:06,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:06,187 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:06,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1808850128, now seen corresponding path program 1 times [2020-12-22 23:58:06,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:06,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699766540] [2020-12-22 23:58:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:06,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699766540] [2020-12-22 23:58:06,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:58:06,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:58:06,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144626563] [2020-12-22 23:58:06,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:58:06,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:06,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:58:06,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:58:06,463 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-12-22 23:58:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:06,490 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2020-12-22 23:58:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:58:06,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 23:58:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:06,502 INFO L225 Difference]: With dead ends: 26 [2020-12-22 23:58:06,502 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 23:58:06,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:58:06,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 23:58:06,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 23:58:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 23:58:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-22 23:58:06,549 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2020-12-22 23:58:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:06,549 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-22 23:58:06,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:58:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-22 23:58:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 23:58:06,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:06,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:06,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:58:06,551 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:06,552 INFO L82 PathProgramCache]: Analyzing trace with hash 291255051, now seen corresponding path program 1 times [2020-12-22 23:58:06,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:06,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922919254] [2020-12-22 23:58:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:06,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922919254] [2020-12-22 23:58:06,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873934332] [2020-12-22 23:58:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:06,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:58:06,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:06,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:06,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:58:06,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361561545] [2020-12-22 23:58:06,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:58:06,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:06,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:58:06,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:58:06,883 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-12-22 23:58:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:06,919 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-12-22 23:58:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:58:06,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 23:58:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:06,921 INFO L225 Difference]: With dead ends: 19 [2020-12-22 23:58:06,921 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 23:58:06,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:58:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 23:58:06,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 23:58:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 23:58:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-22 23:58:06,932 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-22 23:58:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:06,933 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-22 23:58:06,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:58:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-22 23:58:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 23:58:06,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:06,936 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:07,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 23:58:07,151 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:07,154 INFO L82 PathProgramCache]: Analyzing trace with hash 490447920, now seen corresponding path program 2 times [2020-12-22 23:58:07,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:07,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568155568] [2020-12-22 23:58:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:07,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568155568] [2020-12-22 23:58:07,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755990849] [2020-12-22 23:58:07,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:07,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:58:07,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:07,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:58:07,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:07,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:07,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 23:58:07,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076417750] [2020-12-22 23:58:07,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 23:58:07,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:07,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 23:58:07,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:58:07,378 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-22 23:58:07,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:07,399 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-12-22 23:58:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 23:58:07,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-22 23:58:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:07,404 INFO L225 Difference]: With dead ends: 20 [2020-12-22 23:58:07,405 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 23:58:07,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:58:07,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 23:58:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 23:58:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 23:58:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-22 23:58:07,410 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2020-12-22 23:58:07,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:07,410 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-22 23:58:07,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 23:58:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-22 23:58:07,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 23:58:07,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:07,411 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:07,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:07,625 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:07,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1924507733, now seen corresponding path program 3 times [2020-12-22 23:58:07,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:07,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993936535] [2020-12-22 23:58:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:07,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993936535] [2020-12-22 23:58:07,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494526933] [2020-12-22 23:58:07,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:07,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:58:07,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:07,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:58:07,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:07,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:07,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 23:58:07,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105103071] [2020-12-22 23:58:07,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:58:07,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:58:07,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:58:07,900 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2020-12-22 23:58:07,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:07,926 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-12-22 23:58:07,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 23:58:07,927 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-22 23:58:07,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:07,928 INFO L225 Difference]: With dead ends: 21 [2020-12-22 23:58:07,928 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 23:58:07,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:58:07,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 23:58:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 23:58:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 23:58:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 23:58:07,932 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-12-22 23:58:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:07,933 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 23:58:07,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:58:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 23:58:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 23:58:07,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:07,934 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:08,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:08,149 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:08,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:08,151 INFO L82 PathProgramCache]: Analyzing trace with hash 521278352, now seen corresponding path program 4 times [2020-12-22 23:58:08,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:08,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254130139] [2020-12-22 23:58:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:08,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254130139] [2020-12-22 23:58:08,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899573127] [2020-12-22 23:58:08,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:08,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:58:08,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:08,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:58:08,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:08,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:08,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 23:58:08,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345588124] [2020-12-22 23:58:08,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:58:08,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:08,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:58:08,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:58:08,370 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2020-12-22 23:58:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:08,399 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-22 23:58:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:58:08,400 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-22 23:58:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:08,401 INFO L225 Difference]: With dead ends: 22 [2020-12-22 23:58:08,401 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 23:58:08,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:58:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 23:58:08,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 23:58:08,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 23:58:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-22 23:58:08,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-12-22 23:58:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:08,407 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-22 23:58:08,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:58:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-22 23:58:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 23:58:08,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:08,408 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:08,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:08,626 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:08,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:08,627 INFO L82 PathProgramCache]: Analyzing trace with hash -968764341, now seen corresponding path program 5 times [2020-12-22 23:58:08,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:08,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590580515] [2020-12-22 23:58:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:08,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590580515] [2020-12-22 23:58:08,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291133715] [2020-12-22 23:58:08,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:08,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 23:58:08,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:08,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:58:08,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:08,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:08,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 23:58:08,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900912863] [2020-12-22 23:58:08,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:58:08,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:08,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:58:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:58:08,991 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2020-12-22 23:58:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:09,019 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-12-22 23:58:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 23:58:09,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-22 23:58:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:09,021 INFO L225 Difference]: With dead ends: 23 [2020-12-22 23:58:09,021 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 23:58:09,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:58:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 23:58:09,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 23:58:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 23:58:09,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-22 23:58:09,026 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-12-22 23:58:09,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:09,027 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-22 23:58:09,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:58:09,027 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-22 23:58:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 23:58:09,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:09,028 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:09,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 23:58:09,243 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:09,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:09,244 INFO L82 PathProgramCache]: Analyzing trace with hash 84552432, now seen corresponding path program 6 times [2020-12-22 23:58:09,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:09,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212189963] [2020-12-22 23:58:09,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:09,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212189963] [2020-12-22 23:58:09,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773756048] [2020-12-22 23:58:09,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:09,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 23:58:09,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:09,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:58:09,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:09,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:09,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 23:58:09,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295019309] [2020-12-22 23:58:09,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 23:58:09,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:09,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 23:58:09,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:58:09,577 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2020-12-22 23:58:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:09,607 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-22 23:58:09,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:58:09,608 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-22 23:58:09,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:09,609 INFO L225 Difference]: With dead ends: 24 [2020-12-22 23:58:09,609 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 23:58:09,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:58:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 23:58:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 23:58:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 23:58:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-22 23:58:09,614 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-12-22 23:58:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:09,614 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-22 23:58:09,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 23:58:09,615 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-22 23:58:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 23:58:09,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:09,616 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:09,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:09,830 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:09,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1622365973, now seen corresponding path program 7 times [2020-12-22 23:58:09,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:09,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082997792] [2020-12-22 23:58:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:10,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082997792] [2020-12-22 23:58:10,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111840858] [2020-12-22 23:58:10,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:10,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:58:10,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:10,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:10,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:58:10,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396461782] [2020-12-22 23:58:10,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:58:10,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:10,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:58:10,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:58:10,142 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2020-12-22 23:58:10,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:10,175 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-12-22 23:58:10,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:58:10,176 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-12-22 23:58:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:10,177 INFO L225 Difference]: With dead ends: 25 [2020-12-22 23:58:10,177 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 23:58:10,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:58:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 23:58:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 23:58:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 23:58:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 23:58:10,182 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-12-22 23:58:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:10,182 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 23:58:10,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:58:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 23:58:10,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 23:58:10,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:10,183 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:10,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:10,397 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:10,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1297738320, now seen corresponding path program 8 times [2020-12-22 23:58:10,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:10,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49777658] [2020-12-22 23:58:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:10,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49777658] [2020-12-22 23:58:10,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899688953] [2020-12-22 23:58:10,575 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:10,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:58:10,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:10,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:58:10,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:10,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:10,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 23:58:10,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289146325] [2020-12-22 23:58:10,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:58:10,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:10,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:58:10,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:58:10,711 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-12-22 23:58:10,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:10,748 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-22 23:58:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:58:10,749 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-22 23:58:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:10,750 INFO L225 Difference]: With dead ends: 26 [2020-12-22 23:58:10,750 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 23:58:10,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:58:10,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 23:58:10,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 23:58:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 23:58:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-22 23:58:10,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-12-22 23:58:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:10,765 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-22 23:58:10,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:58:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-22 23:58:10,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 23:58:10,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:10,767 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:10,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 23:58:10,983 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:10,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1626658187, now seen corresponding path program 9 times [2020-12-22 23:58:10,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:10,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703655090] [2020-12-22 23:58:10,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:11,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703655090] [2020-12-22 23:58:11,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821666707] [2020-12-22 23:58:11,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:11,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 23:58:11,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:11,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:58:11,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:11,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:11,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 23:58:11,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189760594] [2020-12-22 23:58:11,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 23:58:11,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:11,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 23:58:11,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:58:11,341 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 13 states. [2020-12-22 23:58:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:11,383 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-12-22 23:58:11,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:58:11,384 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-22 23:58:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:11,385 INFO L225 Difference]: With dead ends: 27 [2020-12-22 23:58:11,385 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 23:58:11,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:58:11,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 23:58:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 23:58:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 23:58:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 23:58:11,390 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-12-22 23:58:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:11,390 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 23:58:11,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 23:58:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 23:58:11,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 23:58:11,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:11,391 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:11,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:11,605 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:11,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1061727824, now seen corresponding path program 10 times [2020-12-22 23:58:11,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:11,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148021335] [2020-12-22 23:58:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:11,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148021335] [2020-12-22 23:58:11,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928618635] [2020-12-22 23:58:11,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:11,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:58:11,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:11,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:58:11,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:11,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:11,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 23:58:11,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476975073] [2020-12-22 23:58:11,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:58:11,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:11,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:58:11,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:58:11,937 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 14 states. [2020-12-22 23:58:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:11,968 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-22 23:58:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:58:11,969 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-22 23:58:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:11,969 INFO L225 Difference]: With dead ends: 28 [2020-12-22 23:58:11,970 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 23:58:11,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:58:11,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 23:58:11,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 23:58:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 23:58:11,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-22 23:58:11,974 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2020-12-22 23:58:11,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:11,974 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-22 23:58:11,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:58:11,975 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-22 23:58:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 23:58:11,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:11,975 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:12,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:12,183 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:12,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:12,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1497651755, now seen corresponding path program 11 times [2020-12-22 23:58:12,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:12,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253467783] [2020-12-22 23:58:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:12,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253467783] [2020-12-22 23:58:12,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325999533] [2020-12-22 23:58:12,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:12,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 23:58:12,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:12,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 23:58:12,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:12,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:12,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 23:58:12,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888428199] [2020-12-22 23:58:12,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 23:58:12,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:12,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 23:58:12,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:58:12,622 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 15 states. [2020-12-22 23:58:12,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:12,669 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-22 23:58:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:58:12,669 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-22 23:58:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:12,670 INFO L225 Difference]: With dead ends: 29 [2020-12-22 23:58:12,670 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 23:58:12,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:58:12,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 23:58:12,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 23:58:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 23:58:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 23:58:12,675 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-12-22 23:58:12,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:12,675 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 23:58:12,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 23:58:12,676 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 23:58:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 23:58:12,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:12,676 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:12,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:58:12,892 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:12,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:12,892 INFO L82 PathProgramCache]: Analyzing trace with hash -765959920, now seen corresponding path program 12 times [2020-12-22 23:58:12,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:12,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446780430] [2020-12-22 23:58:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:13,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446780430] [2020-12-22 23:58:13,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205067252] [2020-12-22 23:58:13,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:13,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 23:58:13,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:13,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:58:13,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:13,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:13,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 23:58:13,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447975844] [2020-12-22 23:58:13,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 23:58:13,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:13,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 23:58:13,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 23:58:13,336 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 16 states. [2020-12-22 23:58:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:13,376 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-22 23:58:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 23:58:13,377 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-12-22 23:58:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:13,380 INFO L225 Difference]: With dead ends: 30 [2020-12-22 23:58:13,380 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 23:58:13,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 23:58:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 23:58:13,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 23:58:13,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 23:58:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-22 23:58:13,391 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-12-22 23:58:13,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:13,391 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-22 23:58:13,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 23:58:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-22 23:58:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 23:58:13,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:13,392 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:13,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 23:58:13,607 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:13,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:13,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2076522187, now seen corresponding path program 13 times [2020-12-22 23:58:13,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:13,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792213442] [2020-12-22 23:58:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:13,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792213442] [2020-12-22 23:58:13,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706713648] [2020-12-22 23:58:13,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:13,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:58:13,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:14,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:14,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 23:58:14,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248880756] [2020-12-22 23:58:14,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:58:14,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:14,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:58:14,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:58:14,041 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 17 states. [2020-12-22 23:58:14,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:14,089 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-12-22 23:58:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 23:58:14,090 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-12-22 23:58:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:14,090 INFO L225 Difference]: With dead ends: 31 [2020-12-22 23:58:14,091 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 23:58:14,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:58:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 23:58:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 23:58:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 23:58:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 23:58:14,095 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2020-12-22 23:58:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:14,095 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 23:58:14,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:58:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 23:58:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 23:58:14,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:14,096 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:14,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 23:58:14,311 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:14,312 INFO L82 PathProgramCache]: Analyzing trace with hash -845712, now seen corresponding path program 14 times [2020-12-22 23:58:14,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:14,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352913823] [2020-12-22 23:58:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:14,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352913823] [2020-12-22 23:58:14,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140546203] [2020-12-22 23:58:14,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:14,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:58:14,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:14,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:58:14,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:14,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:14,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 23:58:14,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953811167] [2020-12-22 23:58:14,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:58:14,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:14,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:58:14,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:58:14,820 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 18 states. [2020-12-22 23:58:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:14,866 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-22 23:58:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 23:58:14,867 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-22 23:58:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:14,868 INFO L225 Difference]: With dead ends: 32 [2020-12-22 23:58:14,868 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 23:58:14,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:58:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 23:58:14,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-22 23:58:14,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 23:58:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-22 23:58:14,873 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2020-12-22 23:58:14,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:14,873 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-22 23:58:14,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:58:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-22 23:58:14,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 23:58:14,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:14,874 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:15,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:15,089 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:15,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:15,090 INFO L82 PathProgramCache]: Analyzing trace with hash 25258859, now seen corresponding path program 15 times [2020-12-22 23:58:15,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:15,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512778108] [2020-12-22 23:58:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:15,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512778108] [2020-12-22 23:58:15,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432077705] [2020-12-22 23:58:15,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:15,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 23:58:15,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:15,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 23:58:15,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:15,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:15,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 23:58:15,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627825560] [2020-12-22 23:58:15,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 23:58:15,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:15,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 23:58:15,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:58:15,766 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 19 states. [2020-12-22 23:58:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:15,809 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-22 23:58:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 23:58:15,810 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-22 23:58:15,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:15,811 INFO L225 Difference]: With dead ends: 33 [2020-12-22 23:58:15,811 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 23:58:15,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:58:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 23:58:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-22 23:58:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 23:58:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-22 23:58:15,815 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-12-22 23:58:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:15,815 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-22 23:58:15,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 23:58:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-22 23:58:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 23:58:15,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:15,816 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:16,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 23:58:16,032 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:16,033 INFO L82 PathProgramCache]: Analyzing trace with hash 834500560, now seen corresponding path program 16 times [2020-12-22 23:58:16,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:16,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184800505] [2020-12-22 23:58:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:16,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184800505] [2020-12-22 23:58:16,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342790756] [2020-12-22 23:58:16,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:16,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:58:16,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:16,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:58:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:16,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:16,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 23:58:16,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539456829] [2020-12-22 23:58:16,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 23:58:16,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:16,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 23:58:16,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:58:16,652 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 20 states. [2020-12-22 23:58:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:16,702 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-22 23:58:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 23:58:16,703 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 23:58:16,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:16,704 INFO L225 Difference]: With dead ends: 34 [2020-12-22 23:58:16,704 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 23:58:16,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:58:16,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 23:58:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 23:58:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 23:58:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-22 23:58:16,708 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2020-12-22 23:58:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:16,709 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-22 23:58:16,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 23:58:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-22 23:58:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 23:58:16,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:16,710 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:16,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 23:58:16,923 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash 151189515, now seen corresponding path program 17 times [2020-12-22 23:58:16,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:16,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963759814] [2020-12-22 23:58:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:17,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963759814] [2020-12-22 23:58:17,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129592514] [2020-12-22 23:58:17,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:17,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 23:58:17,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:17,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 23:58:17,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:17,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:17,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 23:58:17,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205296941] [2020-12-22 23:58:17,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:58:17,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:17,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:58:17,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:58:17,594 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 21 states. [2020-12-22 23:58:17,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:17,649 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-22 23:58:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 23:58:17,650 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 23:58:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:17,650 INFO L225 Difference]: With dead ends: 35 [2020-12-22 23:58:17,650 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 23:58:17,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:58:17,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 23:58:17,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 23:58:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 23:58:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-22 23:58:17,655 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-12-22 23:58:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:17,656 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-22 23:58:17,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:58:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-22 23:58:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 23:58:17,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:17,657 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:17,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 23:58:17,872 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:17,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:17,873 INFO L82 PathProgramCache]: Analyzing trace with hash 443383600, now seen corresponding path program 18 times [2020-12-22 23:58:17,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:17,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944187951] [2020-12-22 23:58:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:18,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944187951] [2020-12-22 23:58:18,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183937927] [2020-12-22 23:58:18,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:18,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-22 23:58:18,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:18,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 23:58:18,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:18,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:18,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 23:58:18,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723810731] [2020-12-22 23:58:18,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 23:58:18,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:18,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 23:58:18,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 23:58:18,718 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 22 states. [2020-12-22 23:58:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:18,777 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-22 23:58:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 23:58:18,778 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-22 23:58:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:18,779 INFO L225 Difference]: With dead ends: 36 [2020-12-22 23:58:18,779 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 23:58:18,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 23:58:18,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 23:58:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-22 23:58:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 23:58:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-22 23:58:18,783 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2020-12-22 23:58:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:18,783 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-22 23:58:18,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 23:58:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-22 23:58:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 23:58:18,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:18,784 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:18,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:19,000 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:19,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:19,001 INFO L82 PathProgramCache]: Analyzing trace with hash 911465643, now seen corresponding path program 19 times [2020-12-22 23:58:19,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:19,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103390896] [2020-12-22 23:58:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:19,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103390896] [2020-12-22 23:58:19,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708390614] [2020-12-22 23:58:19,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:19,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 23:58:19,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:19,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:19,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 23:58:19,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794553842] [2020-12-22 23:58:19,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 23:58:19,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:19,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 23:58:19,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:58:19,677 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 23 states. [2020-12-22 23:58:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:19,720 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-12-22 23:58:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:58:19,721 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-22 23:58:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:19,722 INFO L225 Difference]: With dead ends: 37 [2020-12-22 23:58:19,722 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 23:58:19,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:58:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 23:58:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 23:58:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 23:58:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 23:58:19,744 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2020-12-22 23:58:19,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:19,744 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 23:58:19,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 23:58:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 23:58:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 23:58:19,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:19,745 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:19,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:19,961 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:19,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1757860208, now seen corresponding path program 20 times [2020-12-22 23:58:19,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:19,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331732131] [2020-12-22 23:58:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:20,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331732131] [2020-12-22 23:58:20,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591326556] [2020-12-22 23:58:20,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:20,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:58:20,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:20,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 23:58:20,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:20,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:20,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 23:58:20,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316210787] [2020-12-22 23:58:20,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 23:58:20,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:20,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 23:58:20,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:58:20,677 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 24 states. [2020-12-22 23:58:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:20,733 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-22 23:58:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 23:58:20,733 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-22 23:58:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:20,734 INFO L225 Difference]: With dead ends: 38 [2020-12-22 23:58:20,734 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 23:58:20,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:58:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 23:58:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-22 23:58:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 23:58:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-12-22 23:58:20,741 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2020-12-22 23:58:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:20,742 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-12-22 23:58:20,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 23:58:20,743 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-12-22 23:58:20,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 23:58:20,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:20,745 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:20,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 23:58:20,959 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:20,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1392384331, now seen corresponding path program 21 times [2020-12-22 23:58:20,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:20,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393195310] [2020-12-22 23:58:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:21,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393195310] [2020-12-22 23:58:21,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025063963] [2020-12-22 23:58:21,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:22,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 23:58:22,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:22,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 23:58:22,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:22,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:22,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 23:58:22,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276738493] [2020-12-22 23:58:22,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 23:58:22,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:22,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 23:58:22,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 23:58:22,141 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 25 states. [2020-12-22 23:58:22,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:22,201 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-22 23:58:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 23:58:22,202 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-12-22 23:58:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:22,203 INFO L225 Difference]: With dead ends: 39 [2020-12-22 23:58:22,203 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 23:58:22,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 23:58:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 23:58:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 23:58:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 23:58:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-22 23:58:22,207 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2020-12-22 23:58:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:22,207 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-22 23:58:22,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 23:58:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-22 23:58:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 23:58:22,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:22,208 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:22,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 23:58:22,424 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash 265717232, now seen corresponding path program 22 times [2020-12-22 23:58:22,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:22,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765024256] [2020-12-22 23:58:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:23,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765024256] [2020-12-22 23:58:23,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689368640] [2020-12-22 23:58:23,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:23,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:58:23,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:23,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 23:58:23,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:23,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:23,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 23:58:23,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086117506] [2020-12-22 23:58:23,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 23:58:23,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:23,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 23:58:23,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:58:23,311 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 26 states. [2020-12-22 23:58:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:23,377 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-22 23:58:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 23:58:23,378 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-12-22 23:58:23,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:23,378 INFO L225 Difference]: With dead ends: 40 [2020-12-22 23:58:23,379 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 23:58:23,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:58:23,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 23:58:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 23:58:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 23:58:23,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-22 23:58:23,384 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2020-12-22 23:58:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:23,384 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-22 23:58:23,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 23:58:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-22 23:58:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 23:58:23,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:23,385 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:23,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:23,593 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:23,593 INFO L82 PathProgramCache]: Analyzing trace with hash -301224469, now seen corresponding path program 23 times [2020-12-22 23:58:23,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:23,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256116962] [2020-12-22 23:58:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:24,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256116962] [2020-12-22 23:58:24,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602840807] [2020-12-22 23:58:24,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:24,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 23:58:24,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:24,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 23:58:24,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:24,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:24,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 23:58:24,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814310264] [2020-12-22 23:58:24,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 23:58:24,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:24,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 23:58:24,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:58:24,823 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 27 states. [2020-12-22 23:58:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:24,890 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-12-22 23:58:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 23:58:24,890 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-12-22 23:58:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:24,891 INFO L225 Difference]: With dead ends: 41 [2020-12-22 23:58:24,891 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 23:58:24,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:58:24,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 23:58:24,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-22 23:58:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 23:58:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-22 23:58:24,913 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2020-12-22 23:58:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:24,913 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-22 23:58:24,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 23:58:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-22 23:58:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 23:58:24,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:24,914 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:25,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 23:58:25,129 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:25,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash -696548016, now seen corresponding path program 24 times [2020-12-22 23:58:25,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:25,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161295143] [2020-12-22 23:58:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:25,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161295143] [2020-12-22 23:58:25,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947733964] [2020-12-22 23:58:25,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:27,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 23:58:27,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:27,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 23:58:27,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:27,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:27,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 23:58:27,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047444303] [2020-12-22 23:58:27,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 23:58:27,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:27,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 23:58:27,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:58:27,787 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 28 states. [2020-12-22 23:58:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:27,855 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-22 23:58:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 23:58:27,855 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-12-22 23:58:27,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:27,856 INFO L225 Difference]: With dead ends: 42 [2020-12-22 23:58:27,856 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 23:58:27,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:58:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 23:58:27,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-22 23:58:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 23:58:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-12-22 23:58:27,860 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2020-12-22 23:58:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:27,860 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-12-22 23:58:27,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 23:58:27,862 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-12-22 23:58:27,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 23:58:27,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:27,863 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:28,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:28,078 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:28,078 INFO L82 PathProgramCache]: Analyzing trace with hash -66676085, now seen corresponding path program 25 times [2020-12-22 23:58:28,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:28,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645707027] [2020-12-22 23:58:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:28,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645707027] [2020-12-22 23:58:28,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185998300] [2020-12-22 23:58:28,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:28,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 23:58:28,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:29,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:29,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 23:58:29,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596206292] [2020-12-22 23:58:29,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 23:58:29,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:29,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 23:58:29,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:58:29,067 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 29 states. [2020-12-22 23:58:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:29,158 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-12-22 23:58:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 23:58:29,159 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-12-22 23:58:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:29,160 INFO L225 Difference]: With dead ends: 43 [2020-12-22 23:58:29,160 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 23:58:29,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:58:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 23:58:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 23:58:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 23:58:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-22 23:58:29,164 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2020-12-22 23:58:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:29,164 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-22 23:58:29,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 23:58:29,165 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-22 23:58:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 23:58:29,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:29,165 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:29,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 23:58:29,379 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:29,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:29,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2015482704, now seen corresponding path program 26 times [2020-12-22 23:58:29,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:29,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733891064] [2020-12-22 23:58:29,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:30,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733891064] [2020-12-22 23:58:30,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103460435] [2020-12-22 23:58:30,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:30,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:58:30,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:30,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 23:58:30,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:30,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:30,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 23:58:30,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026336989] [2020-12-22 23:58:30,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 23:58:30,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:30,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 23:58:30,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:58:30,422 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 30 states. [2020-12-22 23:58:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:30,509 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-22 23:58:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:58:30,510 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-12-22 23:58:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:30,511 INFO L225 Difference]: With dead ends: 44 [2020-12-22 23:58:30,511 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 23:58:30,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:58:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 23:58:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 23:58:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 23:58:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-12-22 23:58:30,515 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2020-12-22 23:58:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:30,515 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-12-22 23:58:30,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 23:58:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-12-22 23:58:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 23:58:30,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:30,516 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:30,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 23:58:30,731 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:30,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:30,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1996021547, now seen corresponding path program 27 times [2020-12-22 23:58:30,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:30,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292798525] [2020-12-22 23:58:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:31,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292798525] [2020-12-22 23:58:31,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162617509] [2020-12-22 23:58:31,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:34,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-22 23:58:34,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:34,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 23:58:34,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:35,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:35,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 23:58:35,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28214817] [2020-12-22 23:58:35,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 23:58:35,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:35,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 23:58:35,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:58:35,080 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 31 states. [2020-12-22 23:58:35,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:35,153 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-12-22 23:58:35,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 23:58:35,154 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-12-22 23:58:35,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:35,154 INFO L225 Difference]: With dead ends: 45 [2020-12-22 23:58:35,154 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 23:58:35,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:58:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 23:58:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 23:58:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 23:58:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-22 23:58:35,158 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2020-12-22 23:58:35,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:35,159 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-22 23:58:35,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 23:58:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-22 23:58:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 23:58:35,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:35,160 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:35,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 23:58:35,376 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:35,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:35,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1798601744, now seen corresponding path program 28 times [2020-12-22 23:58:35,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:35,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383489405] [2020-12-22 23:58:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:36,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383489405] [2020-12-22 23:58:36,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453300236] [2020-12-22 23:58:36,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:36,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:58:36,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:36,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 23:58:36,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:36,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:36,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 23:58:36,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438828590] [2020-12-22 23:58:36,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 23:58:36,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:36,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 23:58:36,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:58:36,580 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 32 states. [2020-12-22 23:58:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:36,646 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-22 23:58:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 23:58:36,646 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-12-22 23:58:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:36,647 INFO L225 Difference]: With dead ends: 46 [2020-12-22 23:58:36,647 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 23:58:36,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:58:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 23:58:36,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 23:58:36,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 23:58:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-22 23:58:36,651 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2020-12-22 23:58:36,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:36,651 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-22 23:58:36,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 23:58:36,651 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-22 23:58:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 23:58:36,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:36,652 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:36,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 23:58:36,868 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:36,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:36,868 INFO L82 PathProgramCache]: Analyzing trace with hash -26444853, now seen corresponding path program 29 times [2020-12-22 23:58:36,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:36,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708591723] [2020-12-22 23:58:36,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:37,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708591723] [2020-12-22 23:58:37,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799361236] [2020-12-22 23:58:37,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:38,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-22 23:58:38,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:38,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 23:58:38,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:38,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:38,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 23:58:38,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157672754] [2020-12-22 23:58:38,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 23:58:38,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:38,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 23:58:38,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:58:38,684 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 33 states. [2020-12-22 23:58:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:38,776 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-12-22 23:58:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 23:58:38,777 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-12-22 23:58:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:38,777 INFO L225 Difference]: With dead ends: 47 [2020-12-22 23:58:38,777 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 23:58:38,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:58:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 23:58:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 23:58:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 23:58:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-22 23:58:38,780 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-12-22 23:58:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:38,781 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-22 23:58:38,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 23:58:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-22 23:58:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 23:58:38,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:38,782 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:38,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:38,996 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:38,996 INFO L82 PathProgramCache]: Analyzing trace with hash -768314512, now seen corresponding path program 30 times [2020-12-22 23:58:38,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:38,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898040751] [2020-12-22 23:58:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:40,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898040751] [2020-12-22 23:58:40,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438304801] [2020-12-22 23:58:40,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:47,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-22 23:58:47,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:47,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 23:58:47,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:47,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:47,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 23:58:47,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487014991] [2020-12-22 23:58:47,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 23:58:47,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:47,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 23:58:47,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 23:58:47,575 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 34 states. [2020-12-22 23:58:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:47,640 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-22 23:58:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 23:58:47,641 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-12-22 23:58:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:47,641 INFO L225 Difference]: With dead ends: 48 [2020-12-22 23:58:47,641 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 23:58:47,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 23:58:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 23:58:47,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-22 23:58:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 23:58:47,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-12-22 23:58:47,645 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2020-12-22 23:58:47,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:47,645 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-12-22 23:58:47,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 23:58:47,645 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-12-22 23:58:47,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 23:58:47,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:47,646 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:47,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:47,860 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:47,860 INFO L82 PathProgramCache]: Analyzing trace with hash 2003529835, now seen corresponding path program 31 times [2020-12-22 23:58:47,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:47,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990186116] [2020-12-22 23:58:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:49,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990186116] [2020-12-22 23:58:49,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625367202] [2020-12-22 23:58:49,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:49,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 23:58:49,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:49,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:49,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 23:58:49,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113438419] [2020-12-22 23:58:49,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 23:58:49,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:49,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 23:58:49,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:58:49,215 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 35 states. [2020-12-22 23:58:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:49,296 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-22 23:58:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 23:58:49,297 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-12-22 23:58:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:49,297 INFO L225 Difference]: With dead ends: 49 [2020-12-22 23:58:49,297 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 23:58:49,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:58:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 23:58:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 23:58:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 23:58:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-22 23:58:49,302 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2020-12-22 23:58:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:49,302 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-22 23:58:49,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 23:58:49,303 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-22 23:58:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 23:58:49,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:49,303 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:49,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:49,518 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:49,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:49,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2031358672, now seen corresponding path program 32 times [2020-12-22 23:58:49,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:49,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688285714] [2020-12-22 23:58:49,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:50,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688285714] [2020-12-22 23:58:50,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842187520] [2020-12-22 23:58:50,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:50,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:58:50,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:50,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 23:58:50,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:51,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:51,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 23:58:51,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751105314] [2020-12-22 23:58:51,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 23:58:51,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:51,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 23:58:51,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:58:51,035 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 36 states. [2020-12-22 23:58:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:51,121 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-22 23:58:51,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 23:58:51,122 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-12-22 23:58:51,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:51,123 INFO L225 Difference]: With dead ends: 50 [2020-12-22 23:58:51,123 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 23:58:51,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:58:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 23:58:51,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 23:58:51,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 23:58:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-12-22 23:58:51,126 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2020-12-22 23:58:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:51,126 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-12-22 23:58:51,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 23:58:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-12-22 23:58:51,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 23:58:51,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:51,127 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:51,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 23:58:51,343 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:51,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:51,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1400914677, now seen corresponding path program 33 times [2020-12-22 23:58:51,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:51,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238012812] [2020-12-22 23:58:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:52,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238012812] [2020-12-22 23:58:52,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042437193] [2020-12-22 23:58:52,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:59,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 23:58:59,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:59,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 23:58:59,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:58:59,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:59,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 23:58:59,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757584726] [2020-12-22 23:58:59,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 23:58:59,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:59,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 23:58:59,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 23:58:59,356 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 37 states. [2020-12-22 23:58:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:59,444 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-12-22 23:58:59,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 23:58:59,445 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-12-22 23:58:59,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:59,446 INFO L225 Difference]: With dead ends: 51 [2020-12-22 23:58:59,446 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 23:58:59,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 23:58:59,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 23:58:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-22 23:58:59,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 23:58:59,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-22 23:58:59,449 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2020-12-22 23:58:59,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:59,449 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-22 23:58:59,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 23:58:59,450 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-22 23:58:59,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 23:58:59,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:59,450 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:59,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:59,664 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:59,664 INFO L82 PathProgramCache]: Analyzing trace with hash -427206096, now seen corresponding path program 34 times [2020-12-22 23:58:59,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:59,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390998683] [2020-12-22 23:58:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:59:01,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390998683] [2020-12-22 23:59:01,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053338435] [2020-12-22 23:59:01,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:01,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:59:01,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:59:01,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 23:59:01,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:59:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:59:01,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:59:01,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 23:59:01,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728642002] [2020-12-22 23:59:01,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 23:59:01,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:59:01,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 23:59:01,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:59:01,383 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 38 states. [2020-12-22 23:59:01,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:59:01,491 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-22 23:59:01,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 23:59:01,493 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-12-22 23:59:01,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:59:01,493 INFO L225 Difference]: With dead ends: 52 [2020-12-22 23:59:01,493 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 23:59:01,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:59:01,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 23:59:01,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 23:59:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 23:59:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-22 23:59:01,497 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2020-12-22 23:59:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:59:01,497 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-22 23:59:01,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 23:59:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-22 23:59:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 23:59:01,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:59:01,498 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:59:01,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 23:59:01,711 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:59:01,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:59:01,712 INFO L82 PathProgramCache]: Analyzing trace with hash -307011157, now seen corresponding path program 35 times [2020-12-22 23:59:01,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:59:01,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785449336] [2020-12-22 23:59:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:59:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:59:03,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785449336] [2020-12-22 23:59:03,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296456811] [2020-12-22 23:59:03,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:09,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 23:59:09,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:59:09,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 23:59:09,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:59:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:59:09,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:59:09,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 23:59:09,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760955346] [2020-12-22 23:59:09,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 23:59:09,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:59:09,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 23:59:09,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 23:59:09,492 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 39 states. [2020-12-22 23:59:09,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:59:09,589 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-12-22 23:59:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 23:59:09,590 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-12-22 23:59:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:59:09,590 INFO L225 Difference]: With dead ends: 53 [2020-12-22 23:59:09,590 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 23:59:09,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 23:59:09,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 23:59:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 23:59:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 23:59:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-22 23:59:09,598 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2020-12-22 23:59:09,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:59:09,598 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-22 23:59:09,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 23:59:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-22 23:59:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 23:59:09,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:59:09,599 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:59:09,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:09,815 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:59:09,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:59:09,815 INFO L82 PathProgramCache]: Analyzing trace with hash -875935344, now seen corresponding path program 36 times [2020-12-22 23:59:09,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:59:09,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577519120] [2020-12-22 23:59:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:59:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:59:11,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577519120] [2020-12-22 23:59:11,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969127968] [2020-12-22 23:59:11,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:38,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 23:59:38,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:59:38,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 23:59:38,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:59:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:59:38,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:59:38,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 23:59:38,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879632474] [2020-12-22 23:59:38,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 23:59:38,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:59:38,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 23:59:38,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:59:38,330 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 40 states. [2020-12-22 23:59:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:59:38,423 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-12-22 23:59:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 23:59:38,424 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-12-22 23:59:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:59:38,425 INFO L225 Difference]: With dead ends: 54 [2020-12-22 23:59:38,425 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 23:59:38,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:59:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 23:59:38,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-22 23:59:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 23:59:38,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-12-22 23:59:38,428 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2020-12-22 23:59:38,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:59:38,429 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-12-22 23:59:38,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 23:59:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-12-22 23:59:38,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 23:59:38,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:59:38,429 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:59:38,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 23:59:38,643 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:59:38,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:59:38,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1332715957, now seen corresponding path program 37 times [2020-12-22 23:59:38,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:59:38,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082034556] [2020-12-22 23:59:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:59:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:59:40,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082034556] [2020-12-22 23:59:40,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639008779] [2020-12-22 23:59:40,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:40,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 23:59:40,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:59:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:59:40,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:59:40,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 23:59:40,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890551616] [2020-12-22 23:59:40,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 23:59:40,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:59:40,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 23:59:40,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:59:40,657 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 41 states. [2020-12-22 23:59:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:59:40,755 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-12-22 23:59:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 23:59:40,756 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-12-22 23:59:40,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:59:40,756 INFO L225 Difference]: With dead ends: 55 [2020-12-22 23:59:40,756 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 23:59:40,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:59:40,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 23:59:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 23:59:40,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 23:59:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-22 23:59:40,759 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2020-12-22 23:59:40,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:59:40,760 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-22 23:59:40,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 23:59:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-22 23:59:40,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 23:59:40,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:59:40,760 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:59:40,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 23:59:40,975 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:59:40,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:59:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1686954224, now seen corresponding path program 38 times [2020-12-22 23:59:40,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:59:40,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273695670] [2020-12-22 23:59:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:59:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:59:42,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273695670] [2020-12-22 23:59:42,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899394087] [2020-12-22 23:59:42,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:42,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:59:42,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:59:42,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 23:59:42,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:59:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:59:42,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:59:42,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 23:59:42,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470077430] [2020-12-22 23:59:42,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 23:59:42,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:59:42,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 23:59:42,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 23:59:42,938 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 42 states. [2020-12-22 23:59:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:59:43,035 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-12-22 23:59:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 23:59:43,036 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-12-22 23:59:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:59:43,037 INFO L225 Difference]: With dead ends: 56 [2020-12-22 23:59:43,037 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 23:59:43,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 23:59:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 23:59:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-22 23:59:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 23:59:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-12-22 23:59:43,040 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2020-12-22 23:59:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:59:43,040 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-12-22 23:59:43,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 23:59:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-12-22 23:59:43,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 23:59:43,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:59:43,041 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:59:43,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 23:59:43,248 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:59:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:59:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash 807449323, now seen corresponding path program 39 times [2020-12-22 23:59:43,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:59:43,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206274623] [2020-12-22 23:59:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:59:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:59:45,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206274623] [2020-12-22 23:59:45,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281359756] [2020-12-22 23:59:45,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:01:06,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-23 00:01:06,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:01:06,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:01:06,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:01:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:01:06,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:01:06,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 00:01:06,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370874389] [2020-12-23 00:01:06,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:01:06,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:01:06,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:01:06,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:01:06,735 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 43 states. [2020-12-23 00:01:06,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:01:06,865 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-23 00:01:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:01:06,866 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-12-23 00:01:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:01:06,867 INFO L225 Difference]: With dead ends: 57 [2020-12-23 00:01:06,867 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 00:01:06,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:01:06,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 00:01:06,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 00:01:06,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 00:01:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-23 00:01:06,872 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2020-12-23 00:01:06,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:01:06,872 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-23 00:01:06,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:01:06,872 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-23 00:01:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:01:06,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:01:06,873 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:01:07,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:01:07,087 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:01:07,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:01:07,088 INFO L82 PathProgramCache]: Analyzing trace with hash -687398832, now seen corresponding path program 40 times [2020-12-23 00:01:07,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:01:07,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369322308] [2020-12-23 00:01:07,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:01:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:01:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:01:09,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369322308] [2020-12-23 00:01:09,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480458799] [2020-12-23 00:01:09,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:01:09,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:01:09,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:01:09,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 00:01:09,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:01:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:01:09,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:01:09,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 00:01:09,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272629645] [2020-12-23 00:01:09,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 00:01:09,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:01:09,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 00:01:09,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:01:09,322 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 44 states. [2020-12-23 00:01:09,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:01:09,452 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-23 00:01:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 00:01:09,455 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-12-23 00:01:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:01:09,456 INFO L225 Difference]: With dead ends: 58 [2020-12-23 00:01:09,457 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 00:01:09,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:01:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 00:01:09,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 00:01:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 00:01:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-23 00:01:09,461 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2020-12-23 00:01:09,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:01:09,462 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-23 00:01:09,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 00:01:09,462 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-23 00:01:09,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 00:01:09,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:01:09,463 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:01:09,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:01:09,676 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:01:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:01:09,676 INFO L82 PathProgramCache]: Analyzing trace with hash 216948619, now seen corresponding path program 41 times [2020-12-23 00:01:09,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:01:09,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612230047] [2020-12-23 00:01:09,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:01:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:01:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:01:11,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612230047] [2020-12-23 00:01:11,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791590771] [2020-12-23 00:01:11,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:01:27,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-23 00:01:27,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:01:27,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 00:01:27,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:01:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:01:27,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:01:27,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 00:01:27,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446836741] [2020-12-23 00:01:27,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:01:27,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:01:27,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:01:27,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:01:27,201 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 45 states. [2020-12-23 00:01:27,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:01:27,309 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-12-23 00:01:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 00:01:27,310 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2020-12-23 00:01:27,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:01:27,310 INFO L225 Difference]: With dead ends: 59 [2020-12-23 00:01:27,311 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 00:01:27,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:01:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 00:01:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 00:01:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:01:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-23 00:01:27,315 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2020-12-23 00:01:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:01:27,315 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-23 00:01:27,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:01:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-23 00:01:27,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:01:27,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:01:27,316 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:01:27,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 00:01:27,532 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:01:27,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:01:27,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1813051472, now seen corresponding path program 42 times [2020-12-23 00:01:27,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:01:27,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875557740] [2020-12-23 00:01:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:01:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:01:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:01:29,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875557740] [2020-12-23 00:01:29,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008366072] [2020-12-23 00:01:29,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:08,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-23 00:02:08,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:08,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 00:02:08,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:02:08,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:08,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 00:02:08,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985619624] [2020-12-23 00:02:08,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 00:02:08,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:08,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 00:02:08,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:02:08,783 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 46 states. [2020-12-23 00:02:08,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:08,898 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-23 00:02:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 00:02:08,899 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2020-12-23 00:02:08,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:08,900 INFO L225 Difference]: With dead ends: 60 [2020-12-23 00:02:08,900 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 00:02:08,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:02:08,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 00:02:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 00:02:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 00:02:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-12-23 00:02:08,906 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2020-12-23 00:02:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:08,909 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-12-23 00:02:08,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 00:02:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-12-23 00:02:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 00:02:08,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:08,910 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:09,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:09,121 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:09,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:09,121 INFO L82 PathProgramCache]: Analyzing trace with hash -318544853, now seen corresponding path program 43 times [2020-12-23 00:02:09,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:09,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217469417] [2020-12-23 00:02:09,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:02:11,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217469417] [2020-12-23 00:02:11,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357175043] [2020-12-23 00:02:11,431 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:11,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 00:02:11,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:02:11,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:11,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 00:02:11,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658279770] [2020-12-23 00:02:11,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 00:02:11,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:11,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 00:02:11,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:02:11,669 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 47 states. [2020-12-23 00:02:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:11,799 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-12-23 00:02:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 00:02:11,800 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 50 [2020-12-23 00:02:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:11,801 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:02:11,801 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 00:02:11,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:02:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 00:02:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 00:02:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 00:02:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-23 00:02:11,804 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2020-12-23 00:02:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:11,804 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-23 00:02:11,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 00:02:11,804 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-23 00:02:11,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:02:11,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:11,805 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:12,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:12,019 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:12,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:12,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1233479920, now seen corresponding path program 44 times [2020-12-23 00:02:12,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:12,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308188576] [2020-12-23 00:02:12,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:02:14,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308188576] [2020-12-23 00:02:14,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134790008] [2020-12-23 00:02:14,485 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:02:14,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:02:14,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:02:14,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 00:02:14,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:02:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:02:14,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:02:14,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 00:02:14,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20924361] [2020-12-23 00:02:14,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 00:02:14,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:02:14,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 00:02:14,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:02:14,741 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 48 states. [2020-12-23 00:02:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:02:14,879 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-12-23 00:02:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 00:02:14,879 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2020-12-23 00:02:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:02:14,880 INFO L225 Difference]: With dead ends: 62 [2020-12-23 00:02:14,880 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 00:02:14,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:02:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 00:02:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-23 00:02:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 00:02:14,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-12-23 00:02:14,883 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2020-12-23 00:02:14,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:02:14,883 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-12-23 00:02:14,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 00:02:14,883 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-12-23 00:02:14,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 00:02:14,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:02:14,884 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:02:15,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 00:02:15,095 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:02:15,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:02:15,095 INFO L82 PathProgramCache]: Analyzing trace with hash 468304075, now seen corresponding path program 45 times [2020-12-23 00:02:15,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:02:15,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658152916] [2020-12-23 00:02:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:02:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:02:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:02:17,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658152916] [2020-12-23 00:02:17,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175887438] [2020-12-23 00:02:17,615 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true