/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:47:35,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:47:35,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:47:35,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:47:35,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:47:35,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:47:35,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:47:35,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:47:35,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:47:35,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:47:35,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:47:35,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:47:35,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:47:35,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:47:35,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:47:35,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:47:35,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:47:35,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:47:35,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:47:35,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:47:35,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:47:35,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:47:35,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:47:35,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:47:35,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:47:35,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:47:35,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:47:35,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:47:35,445 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:47:35,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:47:35,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:47:35,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:47:35,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:47:35,492 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:47:35,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:47:35,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:47:35,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:47:35,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:47:35,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:47:35,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:47:35,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:47:35,494 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:47:35,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:47:35,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:47:35,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:47:35,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:47:35,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:47:35,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:47:35,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:47:35,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:47:35,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:47:35,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:47:35,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:47:35,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:47:35,497 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:47:35,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:47:35,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:47:35,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:47:35,914 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:47:35,915 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:47:35,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init1_ground-2.i [2021-01-06 09:47:36,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c0a9faff0/90a4a8092f424d1e81f4d31e255ad6f6/FLAG8f3b591b4 [2021-01-06 09:47:36,647 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:47:36,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init1_ground-2.i [2021-01-06 09:47:36,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c0a9faff0/90a4a8092f424d1e81f4d31e255ad6f6/FLAG8f3b591b4 [2021-01-06 09:47:37,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c0a9faff0/90a4a8092f424d1e81f4d31e255ad6f6 [2021-01-06 09:47:37,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:47:37,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:47:37,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:47:37,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:47:37,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:47:37,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:47:37" (1/1) ... [2021-01-06 09:47:37,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de8ac2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:37, skipping insertion in model container [2021-01-06 09:47:37,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:47:37" (1/1) ... [2021-01-06 09:47:37,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:47:37,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:47:37,248 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-2.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,] [2021-01-06 09:47:37,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:47:37,285 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:47:37,304 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-2.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,] [2021-01-06 09:47:37,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:47:37,337 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:47:37,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:37 WrapperNode [2021-01-06 09:47:37,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:47:37,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:47:37,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:47:37,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:47:37,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:37" (1/1) ... [2021-01-06 09:47:37,365 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:37" (1/1) ... [2021-01-06 09:47:37,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:47:37,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:47:37,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:47:37,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:47:37,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:37" (1/1) ... [2021-01-06 09:47:37,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:37" (1/1) ... [2021-01-06 09:47:37,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:37" (1/1) ... [2021-01-06 09:47:37,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:37" (1/1) ... [2021-01-06 09:47:37,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:37" (1/1) ... [2021-01-06 09:47:37,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:37" (1/1) ... [2021-01-06 09:47:37,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:37" (1/1) ... [2021-01-06 09:47:37,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:47:37,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:47:37,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:47:37,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:47:37,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:47:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:47:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:47:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:47:37,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:47:37,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:47:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:47:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:47:37,834 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:47:37,835 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 09:47:37,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:47:37 BoogieIcfgContainer [2021-01-06 09:47:37,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:47:37,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:47:37,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:47:37,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:47:37,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:47:37" (1/3) ... [2021-01-06 09:47:37,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6059eaf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:47:37, skipping insertion in model container [2021-01-06 09:47:37,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:37" (2/3) ... [2021-01-06 09:47:37,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6059eaf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:47:37, skipping insertion in model container [2021-01-06 09:47:37,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:47:37" (3/3) ... [2021-01-06 09:47:37,847 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-2.i [2021-01-06 09:47:37,878 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:47:37,895 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:47:37,949 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:47:38,013 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:47:38,014 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:47:38,014 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:47:38,014 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:47:38,014 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:47:38,014 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:47:38,015 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:47:38,015 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:47:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2021-01-06 09:47:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 09:47:38,040 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:38,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:38,042 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:38,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:38,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1808850128, now seen corresponding path program 1 times [2021-01-06 09:47:38,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:38,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787173097] [2021-01-06 09:47:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:38,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787173097] [2021-01-06 09:47:38,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:47:38,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:47:38,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49728834] [2021-01-06 09:47:38,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:47:38,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:38,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:47:38,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:47:38,324 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2021-01-06 09:47:38,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:38,355 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2021-01-06 09:47:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:47:38,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-01-06 09:47:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:38,368 INFO L225 Difference]: With dead ends: 26 [2021-01-06 09:47:38,368 INFO L226 Difference]: Without dead ends: 11 [2021-01-06 09:47:38,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:47:38,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-01-06 09:47:38,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-01-06 09:47:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 09:47:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-01-06 09:47:38,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2021-01-06 09:47:38,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:38,421 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-01-06 09:47:38,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:47:38,421 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-01-06 09:47:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 09:47:38,421 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:38,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:38,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:47:38,422 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:38,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:38,424 INFO L82 PathProgramCache]: Analyzing trace with hash 291255051, now seen corresponding path program 1 times [2021-01-06 09:47:38,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:38,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690506588] [2021-01-06 09:47:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:38,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690506588] [2021-01-06 09:47:38,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799047888] [2021-01-06 09:47:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:38,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:47:38,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:38,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:38,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:47:38,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930382076] [2021-01-06 09:47:38,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:47:38,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:38,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:47:38,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:47:38,627 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2021-01-06 09:47:38,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:38,643 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-01-06 09:47:38,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:47:38,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 09:47:38,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:38,645 INFO L225 Difference]: With dead ends: 19 [2021-01-06 09:47:38,645 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 09:47:38,646 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 [2021-01-06 09:47:38,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 09:47:38,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 09:47:38,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 09:47:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 09:47:38,650 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-01-06 09:47:38,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:38,650 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 09:47:38,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:47:38,651 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 09:47:38,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 09:47:38,651 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:38,652 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:38,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:47:38,866 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:38,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:38,867 INFO L82 PathProgramCache]: Analyzing trace with hash 490447920, now seen corresponding path program 2 times [2021-01-06 09:47:38,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:38,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793934745] [2021-01-06 09:47:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:38,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793934745] [2021-01-06 09:47:38,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170673671] [2021-01-06 09:47:38,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:38,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:38,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:38,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:47:38,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:39,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:39,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:47:39,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728863607] [2021-01-06 09:47:39,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:47:39,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:39,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:47:39,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:47:39,014 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2021-01-06 09:47:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:39,030 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-01-06 09:47:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:47:39,031 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-01-06 09:47:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:39,032 INFO L225 Difference]: With dead ends: 20 [2021-01-06 09:47:39,032 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 09:47:39,033 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 [2021-01-06 09:47:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 09:47:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 09:47:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 09:47:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 09:47:39,037 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-01-06 09:47:39,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:39,038 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 09:47:39,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:47:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 09:47:39,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 09:47:39,039 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:39,039 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:39,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:39,254 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:39,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1924507733, now seen corresponding path program 3 times [2021-01-06 09:47:39,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:39,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083710676] [2021-01-06 09:47:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:39,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083710676] [2021-01-06 09:47:39,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012366159] [2021-01-06 09:47:39,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:39,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:47:39,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:39,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:47:39,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:39,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:39,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:47:39,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596395002] [2021-01-06 09:47:39,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:47:39,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:39,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:47:39,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:47:39,426 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2021-01-06 09:47:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:39,449 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-01-06 09:47:39,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:47:39,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2021-01-06 09:47:39,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:39,450 INFO L225 Difference]: With dead ends: 21 [2021-01-06 09:47:39,450 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 09:47:39,451 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 [2021-01-06 09:47:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 09:47:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 09:47:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 09:47:39,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-01-06 09:47:39,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2021-01-06 09:47:39,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:39,456 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-01-06 09:47:39,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:47:39,456 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-01-06 09:47:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 09:47:39,457 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:39,457 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:39,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:39,668 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:39,670 INFO L82 PathProgramCache]: Analyzing trace with hash 521278352, now seen corresponding path program 4 times [2021-01-06 09:47:39,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:39,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000171171] [2021-01-06 09:47:39,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:39,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000171171] [2021-01-06 09:47:39,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328155610] [2021-01-06 09:47:39,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:39,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:39,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:39,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:47:39,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:39,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:39,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:47:39,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157336075] [2021-01-06 09:47:39,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:47:39,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:39,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:47:39,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:47:39,855 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2021-01-06 09:47:39,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:39,877 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-01-06 09:47:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:47:39,877 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2021-01-06 09:47:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:39,878 INFO L225 Difference]: With dead ends: 22 [2021-01-06 09:47:39,878 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 09:47:39,879 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 [2021-01-06 09:47:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 09:47:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 09:47:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 09:47:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 09:47:39,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-01-06 09:47:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:39,884 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 09:47:39,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:47:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 09:47:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 09:47:39,885 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:39,885 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:40,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:40,103 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:40,105 INFO L82 PathProgramCache]: Analyzing trace with hash -968764341, now seen corresponding path program 5 times [2021-01-06 09:47:40,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:40,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578417050] [2021-01-06 09:47:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:40,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578417050] [2021-01-06 09:47:40,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522501398] [2021-01-06 09:47:40,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:40,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 09:47:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:40,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:47:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:40,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:40,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:47:40,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049727866] [2021-01-06 09:47:40,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:47:40,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:40,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:47:40,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:47:40,352 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2021-01-06 09:47:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:40,371 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-01-06 09:47:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:47:40,372 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2021-01-06 09:47:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:40,373 INFO L225 Difference]: With dead ends: 23 [2021-01-06 09:47:40,373 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 09:47:40,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:47:40,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 09:47:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 09:47:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 09:47:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-01-06 09:47:40,378 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-01-06 09:47:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:40,378 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-01-06 09:47:40,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:47:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-01-06 09:47:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 09:47:40,379 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:40,379 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:40,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:47:40,593 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:40,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:40,594 INFO L82 PathProgramCache]: Analyzing trace with hash 84552432, now seen corresponding path program 6 times [2021-01-06 09:47:40,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:40,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675875324] [2021-01-06 09:47:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:40,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675875324] [2021-01-06 09:47:40,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931017939] [2021-01-06 09:47:40,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:40,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 09:47:40,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:40,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:47:40,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:40,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:40,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:47:40,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506019329] [2021-01-06 09:47:40,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:47:40,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:40,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:47:40,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:47:40,857 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2021-01-06 09:47:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:40,879 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-01-06 09:47:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:47:40,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2021-01-06 09:47:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:40,881 INFO L225 Difference]: With dead ends: 24 [2021-01-06 09:47:40,881 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 09:47:40,882 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 [2021-01-06 09:47:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 09:47:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 09:47:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 09:47:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 09:47:40,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-01-06 09:47:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:40,886 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 09:47:40,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:47:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 09:47:40,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 09:47:40,887 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:40,887 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:41,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:41,102 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:41,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:41,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1622365973, now seen corresponding path program 7 times [2021-01-06 09:47:41,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:41,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913726158] [2021-01-06 09:47:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:41,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913726158] [2021-01-06 09:47:41,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713281423] [2021-01-06 09:47:41,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:41,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:47:41,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:41,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:41,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:47:41,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457004920] [2021-01-06 09:47:41,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:47:41,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:41,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:47:41,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:47:41,380 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2021-01-06 09:47:41,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:41,404 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-01-06 09:47:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:47:41,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2021-01-06 09:47:41,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:41,405 INFO L225 Difference]: With dead ends: 25 [2021-01-06 09:47:41,405 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 09:47:41,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:47:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 09:47:41,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 09:47:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 09:47:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 09:47:41,410 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2021-01-06 09:47:41,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:41,410 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 09:47:41,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:47:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 09:47:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 09:47:41,411 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:41,412 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:41,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:41,626 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:41,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1297738320, now seen corresponding path program 8 times [2021-01-06 09:47:41,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:41,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148585451] [2021-01-06 09:47:41,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:41,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148585451] [2021-01-06 09:47:41,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314811991] [2021-01-06 09:47:41,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:41,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:41,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:41,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:47:41,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:41,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:41,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:47:41,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206626660] [2021-01-06 09:47:41,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:47:41,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:41,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:47:41,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:47:41,976 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2021-01-06 09:47:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:42,002 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-01-06 09:47:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:47:42,003 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2021-01-06 09:47:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:42,004 INFO L225 Difference]: With dead ends: 26 [2021-01-06 09:47:42,004 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 09:47:42,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:47:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 09:47:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 09:47:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 09:47:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-01-06 09:47:42,009 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-01-06 09:47:42,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:42,010 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-01-06 09:47:42,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:47:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-01-06 09:47:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 09:47:42,011 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:42,011 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:42,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:47:42,226 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:42,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1626658187, now seen corresponding path program 9 times [2021-01-06 09:47:42,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:42,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922138475] [2021-01-06 09:47:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:42,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922138475] [2021-01-06 09:47:42,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463592186] [2021-01-06 09:47:42,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:42,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:47:42,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:42,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:47:42,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:42,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:42,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:47:42,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416228160] [2021-01-06 09:47:42,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:47:42,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:42,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:47:42,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:47:42,524 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 13 states. [2021-01-06 09:47:42,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:42,562 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-01-06 09:47:42,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:47:42,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2021-01-06 09:47:42,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:42,564 INFO L225 Difference]: With dead ends: 27 [2021-01-06 09:47:42,564 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 09:47:42,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:47:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 09:47:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 09:47:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 09:47:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-01-06 09:47:42,578 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2021-01-06 09:47:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:42,579 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-01-06 09:47:42,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:47:42,579 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-01-06 09:47:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 09:47:42,580 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:42,580 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:42,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:42,785 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:42,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:42,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1061727824, now seen corresponding path program 10 times [2021-01-06 09:47:42,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:42,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591943967] [2021-01-06 09:47:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:42,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591943967] [2021-01-06 09:47:42,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728551893] [2021-01-06 09:47:42,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:43,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:43,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:43,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:47:43,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:43,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:43,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:47:43,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374036908] [2021-01-06 09:47:43,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:47:43,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:47:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:47:43,078 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 14 states. [2021-01-06 09:47:43,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:43,099 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-01-06 09:47:43,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:47:43,099 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 09:47:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:43,100 INFO L225 Difference]: With dead ends: 28 [2021-01-06 09:47:43,100 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 09:47:43,101 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 [2021-01-06 09:47:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 09:47:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 09:47:43,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 09:47:43,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 09:47:43,104 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2021-01-06 09:47:43,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:43,105 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 09:47:43,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:47:43,105 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 09:47:43,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 09:47:43,105 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:43,106 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:43,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:43,322 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:43,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:43,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1497651755, now seen corresponding path program 11 times [2021-01-06 09:47:43,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:43,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398216106] [2021-01-06 09:47:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:43,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398216106] [2021-01-06 09:47:43,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490534258] [2021-01-06 09:47:43,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:43,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 09:47:43,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:43,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:47:43,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:43,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:43,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:47:43,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964982721] [2021-01-06 09:47:43,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:47:43,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:43,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:47:43,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:47:43,633 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 15 states. [2021-01-06 09:47:43,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:43,660 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-01-06 09:47:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:47:43,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2021-01-06 09:47:43,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:43,661 INFO L225 Difference]: With dead ends: 29 [2021-01-06 09:47:43,661 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 09:47:43,662 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 [2021-01-06 09:47:43,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 09:47:43,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-06 09:47:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 09:47:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-01-06 09:47:43,666 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-01-06 09:47:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:43,666 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-01-06 09:47:43,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:47:43,667 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-01-06 09:47:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 09:47:43,667 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:43,667 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:43,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:47:43,879 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:43,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:43,880 INFO L82 PathProgramCache]: Analyzing trace with hash -765959920, now seen corresponding path program 12 times [2021-01-06 09:47:43,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:43,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263083170] [2021-01-06 09:47:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:44,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263083170] [2021-01-06 09:47:44,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560359249] [2021-01-06 09:47:44,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:44,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:47:44,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:44,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:47:44,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:44,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:44,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:47:44,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320896019] [2021-01-06 09:47:44,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:47:44,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:44,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:47:44,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:47:44,201 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 16 states. [2021-01-06 09:47:44,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:44,227 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-01-06 09:47:44,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:47:44,227 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2021-01-06 09:47:44,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:44,228 INFO L225 Difference]: With dead ends: 30 [2021-01-06 09:47:44,228 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 09:47:44,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:47:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 09:47:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 09:47:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 09:47:44,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-01-06 09:47:44,232 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2021-01-06 09:47:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:44,233 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-01-06 09:47:44,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:47:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-01-06 09:47:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 09:47:44,234 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:44,234 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:44,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:47:44,448 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2076522187, now seen corresponding path program 13 times [2021-01-06 09:47:44,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:44,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815144513] [2021-01-06 09:47:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:44,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815144513] [2021-01-06 09:47:44,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106842803] [2021-01-06 09:47:44,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:44,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:47:44,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:44,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:44,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:47:44,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755544019] [2021-01-06 09:47:44,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:47:44,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:44,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:47:44,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:47:44,767 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 17 states. [2021-01-06 09:47:44,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:44,832 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-01-06 09:47:44,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:47:44,833 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2021-01-06 09:47:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:44,835 INFO L225 Difference]: With dead ends: 31 [2021-01-06 09:47:44,836 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 09:47:44,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:47:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 09:47:44,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 09:47:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:47:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-01-06 09:47:44,844 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2021-01-06 09:47:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:44,844 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-01-06 09:47:44,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:47:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-01-06 09:47:44,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:47:44,846 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:44,846 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:45,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:47:45,061 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:45,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:45,062 INFO L82 PathProgramCache]: Analyzing trace with hash -845712, now seen corresponding path program 14 times [2021-01-06 09:47:45,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:45,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13845031] [2021-01-06 09:47:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:45,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13845031] [2021-01-06 09:47:45,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181582990] [2021-01-06 09:47:45,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:45,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:45,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:47:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:45,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:45,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:47:45,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913764079] [2021-01-06 09:47:45,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:47:45,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:45,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:47:45,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:47:45,361 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 18 states. [2021-01-06 09:47:45,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:45,398 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-01-06 09:47:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:47:45,401 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2021-01-06 09:47:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:45,402 INFO L225 Difference]: With dead ends: 32 [2021-01-06 09:47:45,402 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 09:47:45,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:47:45,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 09:47:45,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 09:47:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 09:47:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-01-06 09:47:45,407 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2021-01-06 09:47:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:45,407 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-01-06 09:47:45,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:47:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-01-06 09:47:45,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 09:47:45,408 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:45,408 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:45,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:45,624 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash 25258859, now seen corresponding path program 15 times [2021-01-06 09:47:45,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:45,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37014566] [2021-01-06 09:47:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:45,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37014566] [2021-01-06 09:47:45,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572608080] [2021-01-06 09:47:45,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:45,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 09:47:45,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:45,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:47:46,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:46,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:46,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 09:47:46,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165375940] [2021-01-06 09:47:46,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:47:46,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:46,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:47:46,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:47:46,067 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 19 states. [2021-01-06 09:47:46,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:46,100 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-01-06 09:47:46,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:47:46,101 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2021-01-06 09:47:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:46,101 INFO L225 Difference]: With dead ends: 33 [2021-01-06 09:47:46,101 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 09:47:46,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:47:46,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 09:47:46,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 09:47:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 09:47:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-01-06 09:47:46,107 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2021-01-06 09:47:46,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:46,107 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-01-06 09:47:46,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:47:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-01-06 09:47:46,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 09:47:46,113 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:46,113 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:46,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:47:46,328 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:46,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:46,329 INFO L82 PathProgramCache]: Analyzing trace with hash 834500560, now seen corresponding path program 16 times [2021-01-06 09:47:46,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:46,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547479641] [2021-01-06 09:47:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:46,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547479641] [2021-01-06 09:47:46,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947878427] [2021-01-06 09:47:46,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:46,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:46,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:46,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:47:46,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:46,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:46,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:47:46,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338729245] [2021-01-06 09:47:46,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:47:46,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:46,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:47:46,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:47:46,680 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 20 states. [2021-01-06 09:47:46,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:46,714 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-01-06 09:47:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:47:46,714 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 09:47:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:46,717 INFO L225 Difference]: With dead ends: 34 [2021-01-06 09:47:46,717 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 09:47:46,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:47:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 09:47:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 09:47:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 09:47:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 09:47:46,728 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2021-01-06 09:47:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:46,730 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 09:47:46,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:47:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 09:47:46,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 09:47:46,734 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:46,734 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:46,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:47:46,948 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:46,949 INFO L82 PathProgramCache]: Analyzing trace with hash 151189515, now seen corresponding path program 17 times [2021-01-06 09:47:46,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:46,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172518620] [2021-01-06 09:47:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:47,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172518620] [2021-01-06 09:47:47,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058668994] [2021-01-06 09:47:47,241 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 [2021-01-06 09:47:47,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 09:47:47,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:47,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 09:47:47,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:47,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:47,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 09:47:47,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030934325] [2021-01-06 09:47:47,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:47:47,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:47,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:47:47,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:47:47,437 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 21 states. [2021-01-06 09:47:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:47,471 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-01-06 09:47:47,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 09:47:47,471 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 09:47:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:47,472 INFO L225 Difference]: With dead ends: 35 [2021-01-06 09:47:47,472 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 09:47:47,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:47:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 09:47:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 09:47:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 09:47:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-06 09:47:47,476 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2021-01-06 09:47:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:47,477 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-06 09:47:47,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:47:47,477 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-06 09:47:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 09:47:47,477 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:47,477 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:47,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 09:47:47,692 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:47,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:47,693 INFO L82 PathProgramCache]: Analyzing trace with hash 443383600, now seen corresponding path program 18 times [2021-01-06 09:47:47,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:47,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589963610] [2021-01-06 09:47:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:47,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589963610] [2021-01-06 09:47:47,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465341694] [2021-01-06 09:47:47,956 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 [2021-01-06 09:47:48,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 09:47:48,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:48,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 09:47:48,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:48,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:48,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 09:47:48,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942260337] [2021-01-06 09:47:48,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 09:47:48,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:48,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 09:47:48,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 09:47:48,349 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 22 states. [2021-01-06 09:47:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:48,383 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-01-06 09:47:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 09:47:48,383 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2021-01-06 09:47:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:48,384 INFO L225 Difference]: With dead ends: 36 [2021-01-06 09:47:48,384 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 09:47:48,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 09:47:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 09:47:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 09:47:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 09:47:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-01-06 09:47:48,388 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2021-01-06 09:47:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:48,388 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-01-06 09:47:48,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 09:47:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-01-06 09:47:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 09:47:48,389 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:48,389 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:48,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:48,605 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:48,605 INFO L82 PathProgramCache]: Analyzing trace with hash 911465643, now seen corresponding path program 19 times [2021-01-06 09:47:48,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:48,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871482735] [2021-01-06 09:47:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:48,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871482735] [2021-01-06 09:47:48,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819105442] [2021-01-06 09:47:48,928 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 [2021-01-06 09:47:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:48,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:47:48,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:49,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:49,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 09:47:49,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144865724] [2021-01-06 09:47:49,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:47:49,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:49,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:47:49,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:47:49,063 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 23 states. [2021-01-06 09:47:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:49,093 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-01-06 09:47:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:47:49,093 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2021-01-06 09:47:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:49,094 INFO L225 Difference]: With dead ends: 37 [2021-01-06 09:47:49,094 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 09:47:49,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:47:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 09:47:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 09:47:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 09:47:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 09:47:49,099 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2021-01-06 09:47:49,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:49,099 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 09:47:49,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:47:49,099 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 09:47:49,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 09:47:49,100 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:49,100 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:49,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:49,313 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:49,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:49,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1757860208, now seen corresponding path program 20 times [2021-01-06 09:47:49,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:49,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065387088] [2021-01-06 09:47:49,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:49,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065387088] [2021-01-06 09:47:49,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10086531] [2021-01-06 09:47:49,657 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 [2021-01-06 09:47:49,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:49,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:49,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:47:49,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:49,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:49,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 09:47:49,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418249828] [2021-01-06 09:47:49,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:47:49,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:47:49,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:47:49,788 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 24 states. [2021-01-06 09:47:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:49,833 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-01-06 09:47:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 09:47:49,833 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2021-01-06 09:47:49,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:49,834 INFO L225 Difference]: With dead ends: 38 [2021-01-06 09:47:49,834 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 09:47:49,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:47:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 09:47:49,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 09:47:49,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 09:47:49,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-01-06 09:47:49,839 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2021-01-06 09:47:49,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:49,839 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-01-06 09:47:49,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:47:49,840 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-01-06 09:47:49,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 09:47:49,840 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:49,840 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:50,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 09:47:50,054 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:50,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:50,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1392384331, now seen corresponding path program 21 times [2021-01-06 09:47:50,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:50,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645130242] [2021-01-06 09:47:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:50,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645130242] [2021-01-06 09:47:50,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047403074] [2021-01-06 09:47:50,409 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 [2021-01-06 09:47:50,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 09:47:50,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:50,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 09:47:50,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:51,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:51,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 09:47:51,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950908] [2021-01-06 09:47:51,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 09:47:51,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:51,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 09:47:51,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 09:47:51,039 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 25 states. [2021-01-06 09:47:51,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:51,082 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-01-06 09:47:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 09:47:51,083 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2021-01-06 09:47:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:51,083 INFO L225 Difference]: With dead ends: 39 [2021-01-06 09:47:51,083 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:47:51,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 09:47:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:47:51,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 09:47:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 09:47:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-01-06 09:47:51,091 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2021-01-06 09:47:51,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:51,091 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-01-06 09:47:51,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 09:47:51,091 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-01-06 09:47:51,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 09:47:51,092 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:51,092 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:51,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 09:47:51,306 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:51,307 INFO L82 PathProgramCache]: Analyzing trace with hash 265717232, now seen corresponding path program 22 times [2021-01-06 09:47:51,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:51,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948340709] [2021-01-06 09:47:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:51,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948340709] [2021-01-06 09:47:51,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199396567] [2021-01-06 09:47:51,745 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 [2021-01-06 09:47:51,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:51,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:51,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 09:47:51,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:51,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:51,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 09:47:51,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654933818] [2021-01-06 09:47:51,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 09:47:51,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:51,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 09:47:51,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:47:51,858 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 26 states. [2021-01-06 09:47:51,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:51,897 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-01-06 09:47:51,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 09:47:51,898 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2021-01-06 09:47:51,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:51,898 INFO L225 Difference]: With dead ends: 40 [2021-01-06 09:47:51,898 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 09:47:51,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:47:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 09:47:51,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 09:47:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 09:47:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-06 09:47:51,903 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2021-01-06 09:47:51,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:51,903 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-06 09:47:51,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 09:47:51,903 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-06 09:47:51,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 09:47:51,904 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:51,904 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:52,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:52,119 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:52,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:52,119 INFO L82 PathProgramCache]: Analyzing trace with hash -301224469, now seen corresponding path program 23 times [2021-01-06 09:47:52,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:52,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356619504] [2021-01-06 09:47:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:52,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356619504] [2021-01-06 09:47:52,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206155331] [2021-01-06 09:47:52,559 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 [2021-01-06 09:47:52,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 09:47:52,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:52,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 09:47:52,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:52,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:52,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 09:47:52,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299623422] [2021-01-06 09:47:52,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 09:47:52,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:52,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 09:47:52,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:47:52,997 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 27 states. [2021-01-06 09:47:53,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:53,041 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-01-06 09:47:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 09:47:53,042 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2021-01-06 09:47:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:53,042 INFO L225 Difference]: With dead ends: 41 [2021-01-06 09:47:53,042 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 09:47:53,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:47:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 09:47:53,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-01-06 09:47:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 09:47:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-01-06 09:47:53,046 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2021-01-06 09:47:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:53,047 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-01-06 09:47:53,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 09:47:53,047 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-01-06 09:47:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 09:47:53,047 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:53,047 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:53,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 09:47:53,262 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:53,264 INFO L82 PathProgramCache]: Analyzing trace with hash -696548016, now seen corresponding path program 24 times [2021-01-06 09:47:53,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:53,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250392397] [2021-01-06 09:47:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:53,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250392397] [2021-01-06 09:47:53,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183504195] [2021-01-06 09:47:53,725 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 [2021-01-06 09:47:55,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 09:47:55,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:55,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 09:47:55,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:55,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:55,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 09:47:55,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176832365] [2021-01-06 09:47:55,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 09:47:55,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:55,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 09:47:55,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 09:47:55,235 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 28 states. [2021-01-06 09:47:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:55,285 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-01-06 09:47:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 09:47:55,285 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2021-01-06 09:47:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:55,286 INFO L225 Difference]: With dead ends: 42 [2021-01-06 09:47:55,286 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 09:47:55,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 09:47:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 09:47:55,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 09:47:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 09:47:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-01-06 09:47:55,290 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2021-01-06 09:47:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:55,290 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-01-06 09:47:55,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 09:47:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-01-06 09:47:55,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 09:47:55,291 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:55,291 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:55,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:55,504 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:55,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:55,504 INFO L82 PathProgramCache]: Analyzing trace with hash -66676085, now seen corresponding path program 25 times [2021-01-06 09:47:55,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:55,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203599776] [2021-01-06 09:47:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:55,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203599776] [2021-01-06 09:47:55,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480138179] [2021-01-06 09:47:55,997 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 [2021-01-06 09:47:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:56,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 09:47:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:56,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:56,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 09:47:56,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957008464] [2021-01-06 09:47:56,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:47:56,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:56,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:47:56,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:47:56,120 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 29 states. [2021-01-06 09:47:56,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:56,187 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-01-06 09:47:56,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 09:47:56,188 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2021-01-06 09:47:56,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:56,189 INFO L225 Difference]: With dead ends: 43 [2021-01-06 09:47:56,189 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 09:47:56,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:47:56,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 09:47:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 09:47:56,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 09:47:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-01-06 09:47:56,194 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2021-01-06 09:47:56,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:56,195 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-01-06 09:47:56,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:47:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-01-06 09:47:56,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 09:47:56,195 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:56,195 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:56,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 09:47:56,409 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2015482704, now seen corresponding path program 26 times [2021-01-06 09:47:56,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:56,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337360274] [2021-01-06 09:47:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:56,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337360274] [2021-01-06 09:47:56,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477770127] [2021-01-06 09:47:56,921 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 [2021-01-06 09:47:56,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:56,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:56,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 09:47:56,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:57,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:57,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 09:47:57,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301543245] [2021-01-06 09:47:57,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 09:47:57,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:57,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 09:47:57,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:47:57,051 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 30 states. [2021-01-06 09:47:57,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:57,097 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-01-06 09:47:57,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 09:47:57,097 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2021-01-06 09:47:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:57,098 INFO L225 Difference]: With dead ends: 44 [2021-01-06 09:47:57,098 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 09:47:57,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:47:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 09:47:57,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-01-06 09:47:57,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 09:47:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-01-06 09:47:57,102 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2021-01-06 09:47:57,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:57,103 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-01-06 09:47:57,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 09:47:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-01-06 09:47:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 09:47:57,103 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:57,103 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:57,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 09:47:57,318 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:57,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1996021547, now seen corresponding path program 27 times [2021-01-06 09:47:57,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:57,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209409359] [2021-01-06 09:47:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:57,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209409359] [2021-01-06 09:47:57,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920184239] [2021-01-06 09:47:57,881 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 [2021-01-06 09:48:02,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 09:48:02,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:02,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 09:48:02,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:02,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:02,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 09:48:02,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534311009] [2021-01-06 09:48:02,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 09:48:02,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:02,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 09:48:02,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 09:48:02,620 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 31 states. [2021-01-06 09:48:02,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:02,667 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-01-06 09:48:02,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 09:48:02,668 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2021-01-06 09:48:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:02,668 INFO L225 Difference]: With dead ends: 45 [2021-01-06 09:48:02,668 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 09:48:02,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 09:48:02,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 09:48:02,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 09:48:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 09:48:02,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-01-06 09:48:02,672 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2021-01-06 09:48:02,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:02,673 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-01-06 09:48:02,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 09:48:02,673 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-01-06 09:48:02,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 09:48:02,673 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:02,673 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:02,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 09:48:02,887 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:02,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:02,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1798601744, now seen corresponding path program 28 times [2021-01-06 09:48:02,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:02,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312379122] [2021-01-06 09:48:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:03,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312379122] [2021-01-06 09:48:03,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419413177] [2021-01-06 09:48:03,432 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 [2021-01-06 09:48:03,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:48:03,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:03,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 09:48:03,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:03,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:03,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 09:48:03,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986150249] [2021-01-06 09:48:03,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 09:48:03,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:03,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 09:48:03,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:48:03,566 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 32 states. [2021-01-06 09:48:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:03,611 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-01-06 09:48:03,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 09:48:03,611 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2021-01-06 09:48:03,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:03,612 INFO L225 Difference]: With dead ends: 46 [2021-01-06 09:48:03,612 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 09:48:03,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:48:03,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 09:48:03,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 09:48:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 09:48:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-01-06 09:48:03,616 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2021-01-06 09:48:03,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:03,616 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-01-06 09:48:03,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 09:48:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-01-06 09:48:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 09:48:03,617 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:03,617 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:03,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 09:48:03,830 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:03,831 INFO L82 PathProgramCache]: Analyzing trace with hash -26444853, now seen corresponding path program 29 times [2021-01-06 09:48:03,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:03,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590255002] [2021-01-06 09:48:03,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:04,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590255002] [2021-01-06 09:48:04,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593549700] [2021-01-06 09:48:04,491 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 [2021-01-06 09:48:05,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-01-06 09:48:05,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:05,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 09:48:05,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:05,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:05,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 09:48:05,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103818114] [2021-01-06 09:48:05,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 09:48:05,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 09:48:05,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 09:48:05,170 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 33 states. [2021-01-06 09:48:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:05,219 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-01-06 09:48:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 09:48:05,219 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2021-01-06 09:48:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:05,220 INFO L225 Difference]: With dead ends: 47 [2021-01-06 09:48:05,220 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 09:48:05,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 09:48:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 09:48:05,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-01-06 09:48:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 09:48:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-01-06 09:48:05,224 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2021-01-06 09:48:05,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:05,224 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-01-06 09:48:05,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 09:48:05,224 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-01-06 09:48:05,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 09:48:05,224 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:05,225 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:05,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:48:05,437 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash -768314512, now seen corresponding path program 30 times [2021-01-06 09:48:05,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:05,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481673438] [2021-01-06 09:48:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:06,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481673438] [2021-01-06 09:48:06,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488510993] [2021-01-06 09:48:06,097 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 [2021-01-06 09:48:07,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-01-06 09:48:07,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:07,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 09:48:07,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:08,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:08,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 09:48:08,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797237184] [2021-01-06 09:48:08,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 09:48:08,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:08,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 09:48:08,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 09:48:08,019 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 34 states. [2021-01-06 09:48:08,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:08,065 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-01-06 09:48:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 09:48:08,065 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2021-01-06 09:48:08,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:08,066 INFO L225 Difference]: With dead ends: 48 [2021-01-06 09:48:08,066 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 09:48:08,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 09:48:08,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 09:48:08,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 09:48:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 09:48:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-01-06 09:48:08,070 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2021-01-06 09:48:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:08,070 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-01-06 09:48:08,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 09:48:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-01-06 09:48:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 09:48:08,071 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:08,071 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:08,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:48:08,285 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:08,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2003529835, now seen corresponding path program 31 times [2021-01-06 09:48:08,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:08,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998000642] [2021-01-06 09:48:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:09,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998000642] [2021-01-06 09:48:09,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504062286] [2021-01-06 09:48:09,014 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 [2021-01-06 09:48:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:09,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 09:48:09,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:09,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:09,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 09:48:09,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240193294] [2021-01-06 09:48:09,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 09:48:09,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:09,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 09:48:09,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:48:09,165 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 35 states. [2021-01-06 09:48:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:09,221 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-01-06 09:48:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 09:48:09,222 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2021-01-06 09:48:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:09,222 INFO L225 Difference]: With dead ends: 49 [2021-01-06 09:48:09,223 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 09:48:09,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:48:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 09:48:09,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 09:48:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 09:48:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-01-06 09:48:09,227 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2021-01-06 09:48:09,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:09,228 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-01-06 09:48:09,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 09:48:09,228 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-01-06 09:48:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 09:48:09,228 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:09,228 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:09,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:48:09,444 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:09,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2031358672, now seen corresponding path program 32 times [2021-01-06 09:48:09,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:09,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026901519] [2021-01-06 09:48:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:10,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026901519] [2021-01-06 09:48:10,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508595715] [2021-01-06 09:48:10,108 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 [2021-01-06 09:48:10,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:48:10,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:10,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 09:48:10,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:10,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:10,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 09:48:10,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288923927] [2021-01-06 09:48:10,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 09:48:10,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:10,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 09:48:10,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:48:10,257 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 36 states. [2021-01-06 09:48:10,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:10,316 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-01-06 09:48:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 09:48:10,316 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2021-01-06 09:48:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:10,317 INFO L225 Difference]: With dead ends: 50 [2021-01-06 09:48:10,317 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 09:48:10,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:48:10,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 09:48:10,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-06 09:48:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 09:48:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-01-06 09:48:10,321 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2021-01-06 09:48:10,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:10,321 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-01-06 09:48:10,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 09:48:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-01-06 09:48:10,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 09:48:10,322 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:10,322 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:10,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 09:48:10,536 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:10,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:10,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1400914677, now seen corresponding path program 33 times [2021-01-06 09:48:10,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:10,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240888663] [2021-01-06 09:48:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:11,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240888663] [2021-01-06 09:48:11,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628284254] [2021-01-06 09:48:11,303 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 [2021-01-06 09:48:28,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 09:48:28,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:28,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 09:48:28,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:28,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:28,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 09:48:28,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930102912] [2021-01-06 09:48:28,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 09:48:28,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:28,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 09:48:28,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 09:48:28,691 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 37 states. [2021-01-06 09:48:28,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:28,750 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-01-06 09:48:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 09:48:28,750 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2021-01-06 09:48:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:28,751 INFO L225 Difference]: With dead ends: 51 [2021-01-06 09:48:28,751 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 09:48:28,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 09:48:28,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 09:48:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 09:48:28,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:48:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-01-06 09:48:28,764 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2021-01-06 09:48:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:28,764 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-01-06 09:48:28,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 09:48:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-01-06 09:48:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:48:28,764 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:28,765 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:28,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:48:28,966 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:28,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:28,966 INFO L82 PathProgramCache]: Analyzing trace with hash -427206096, now seen corresponding path program 34 times [2021-01-06 09:48:28,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:28,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716510603] [2021-01-06 09:48:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:29,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716510603] [2021-01-06 09:48:29,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392847507] [2021-01-06 09:48:29,848 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 [2021-01-06 09:48:29,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:48:29,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:29,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 09:48:29,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:29,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:29,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 09:48:29,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592295099] [2021-01-06 09:48:29,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 09:48:29,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:29,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 09:48:29,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:48:29,998 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 38 states. [2021-01-06 09:48:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:30,058 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-01-06 09:48:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 09:48:30,058 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2021-01-06 09:48:30,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:30,059 INFO L225 Difference]: With dead ends: 52 [2021-01-06 09:48:30,059 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 09:48:30,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:48:30,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 09:48:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-06 09:48:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 09:48:30,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-01-06 09:48:30,063 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2021-01-06 09:48:30,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:30,063 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-01-06 09:48:30,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 09:48:30,063 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-01-06 09:48:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 09:48:30,064 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:30,064 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:30,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 09:48:30,277 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:30,278 INFO L82 PathProgramCache]: Analyzing trace with hash -307011157, now seen corresponding path program 35 times [2021-01-06 09:48:30,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:30,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859698855] [2021-01-06 09:48:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:31,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859698855] [2021-01-06 09:48:31,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865601486] [2021-01-06 09:48:31,167 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 [2021-01-06 09:48:37,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-01-06 09:48:37,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:37,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 09:48:37,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:37,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:37,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 09:48:37,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012421691] [2021-01-06 09:48:37,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 09:48:37,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:37,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 09:48:37,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 09:48:37,794 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 39 states. [2021-01-06 09:48:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:37,863 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-01-06 09:48:37,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 09:48:37,863 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2021-01-06 09:48:37,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:37,864 INFO L225 Difference]: With dead ends: 53 [2021-01-06 09:48:37,864 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 09:48:37,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 09:48:37,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 09:48:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 09:48:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 09:48:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-01-06 09:48:37,868 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2021-01-06 09:48:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:37,868 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-01-06 09:48:37,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 09:48:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-01-06 09:48:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 09:48:37,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:37,869 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:38,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:48:38,084 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:38,084 INFO L82 PathProgramCache]: Analyzing trace with hash -875935344, now seen corresponding path program 36 times [2021-01-06 09:48:38,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:38,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105860156] [2021-01-06 09:48:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:48:39,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105860156] [2021-01-06 09:48:39,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694230153] [2021-01-06 09:48:39,055 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 [2021-01-06 09:49:30,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 09:49:30,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:49:31,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 09:49:31,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:49:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:49:31,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:49:31,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 09:49:31,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866361329] [2021-01-06 09:49:31,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 09:49:31,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:49:31,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 09:49:31,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 09:49:31,143 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 40 states. [2021-01-06 09:49:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:49:31,196 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-01-06 09:49:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 09:49:31,196 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2021-01-06 09:49:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:49:31,197 INFO L225 Difference]: With dead ends: 54 [2021-01-06 09:49:31,197 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 09:49:31,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 09:49:31,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 09:49:31,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-06 09:49:31,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 09:49:31,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-01-06 09:49:31,200 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2021-01-06 09:49:31,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:49:31,201 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-01-06 09:49:31,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 09:49:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-01-06 09:49:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 09:49:31,201 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:49:31,201 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:49:31,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 09:49:31,417 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:49:31,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:49:31,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1332715957, now seen corresponding path program 37 times [2021-01-06 09:49:31,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:49:31,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799463376] [2021-01-06 09:49:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:49:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:49:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:49:32,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799463376] [2021-01-06 09:49:32,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985231537] [2021-01-06 09:49:32,412 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 [2021-01-06 09:49:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:49:32,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 09:49:32,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:49:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:49:32,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:49:32,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 09:49:32,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550084106] [2021-01-06 09:49:32,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 09:49:32,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:49:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 09:49:32,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 09:49:32,556 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 41 states. [2021-01-06 09:49:32,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:49:32,623 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-01-06 09:49:32,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 09:49:32,623 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2021-01-06 09:49:32,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:49:32,624 INFO L225 Difference]: With dead ends: 55 [2021-01-06 09:49:32,624 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 09:49:32,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 09:49:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 09:49:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 09:49:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 09:49:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-01-06 09:49:32,628 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2021-01-06 09:49:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:49:32,628 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-01-06 09:49:32,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 09:49:32,629 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-01-06 09:49:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 09:49:32,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:49:32,629 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:49:32,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 09:49:32,842 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:49:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:49:32,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1686954224, now seen corresponding path program 38 times [2021-01-06 09:49:32,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:49:32,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637681752] [2021-01-06 09:49:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:49:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:49:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:49:33,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637681752] [2021-01-06 09:49:33,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782816462] [2021-01-06 09:49:33,873 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 [2021-01-06 09:49:33,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:49:33,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:49:33,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 09:49:33,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:49:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:49:34,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:49:34,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 09:49:34,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655957391] [2021-01-06 09:49:34,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 09:49:34,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:49:34,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 09:49:34,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 09:49:34,020 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 42 states. [2021-01-06 09:49:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:49:34,072 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-01-06 09:49:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 09:49:34,072 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2021-01-06 09:49:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:49:34,073 INFO L225 Difference]: With dead ends: 56 [2021-01-06 09:49:34,073 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 09:49:34,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 09:49:34,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 09:49:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-01-06 09:49:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 09:49:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-01-06 09:49:34,077 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2021-01-06 09:49:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:49:34,077 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-01-06 09:49:34,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 09:49:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-01-06 09:49:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 09:49:34,078 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:49:34,078 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:49:34,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 09:49:34,293 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:49:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:49:34,293 INFO L82 PathProgramCache]: Analyzing trace with hash 807449323, now seen corresponding path program 39 times [2021-01-06 09:49:34,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:49:34,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559754444] [2021-01-06 09:49:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:49:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:49:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:49:35,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559754444] [2021-01-06 09:49:35,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867564089] [2021-01-06 09:49:35,323 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 [2021-01-06 09:50:10,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-01-06 09:50:10,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:50:10,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 09:50:10,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:50:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:50:10,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:50:10,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 09:50:10,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973306926] [2021-01-06 09:50:10,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 09:50:10,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:50:10,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 09:50:10,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 09:50:10,541 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 43 states. [2021-01-06 09:50:10,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:50:10,609 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-01-06 09:50:10,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 09:50:10,610 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2021-01-06 09:50:10,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:50:10,611 INFO L225 Difference]: With dead ends: 57 [2021-01-06 09:50:10,611 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 09:50:10,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 09:50:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 09:50:10,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 09:50:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 09:50:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-01-06 09:50:10,614 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2021-01-06 09:50:10,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:50:10,615 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-01-06 09:50:10,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 09:50:10,615 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-01-06 09:50:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 09:50:10,615 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:50:10,615 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:50:10,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 09:50:10,816 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:50:10,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:50:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash -687398832, now seen corresponding path program 40 times [2021-01-06 09:50:10,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:50:10,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882758541] [2021-01-06 09:50:10,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:50:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:50:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:50:11,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882758541] [2021-01-06 09:50:11,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641182065] [2021-01-06 09:50:11,955 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 [2021-01-06 09:50:12,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:50:12,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:50:12,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 09:50:12,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:50:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:50:12,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:50:12,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 09:50:12,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837282274] [2021-01-06 09:50:12,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 09:50:12,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:50:12,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 09:50:12,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 09:50:12,119 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 44 states. [2021-01-06 09:50:12,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:50:12,194 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-01-06 09:50:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 09:50:12,195 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2021-01-06 09:50:12,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:50:12,195 INFO L225 Difference]: With dead ends: 58 [2021-01-06 09:50:12,196 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 09:50:12,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 09:50:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 09:50:12,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 09:50:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 09:50:12,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-01-06 09:50:12,199 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2021-01-06 09:50:12,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:50:12,199 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-01-06 09:50:12,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 09:50:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-01-06 09:50:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 09:50:12,200 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:50:12,200 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:50:12,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:50:12,416 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:50:12,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:50:12,416 INFO L82 PathProgramCache]: Analyzing trace with hash 216948619, now seen corresponding path program 41 times [2021-01-06 09:50:12,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:50:12,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016705586] [2021-01-06 09:50:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:50:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:50:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:50:13,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016705586] [2021-01-06 09:50:13,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473490094] [2021-01-06 09:50:13,657 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 [2021-01-06 09:50:28,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-01-06 09:50:28,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:50:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 09:50:28,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:50:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:50:29,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:50:29,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 09:50:29,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645038891] [2021-01-06 09:50:29,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 09:50:29,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:50:29,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 09:50:29,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 09:50:29,074 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 45 states. [2021-01-06 09:50:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:50:29,143 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-01-06 09:50:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 09:50:29,144 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2021-01-06 09:50:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:50:29,145 INFO L225 Difference]: With dead ends: 59 [2021-01-06 09:50:29,145 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 09:50:29,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 09:50:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 09:50:29,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-01-06 09:50:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 09:50:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-01-06 09:50:29,151 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2021-01-06 09:50:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:50:29,151 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-01-06 09:50:29,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 09:50:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-01-06 09:50:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 09:50:29,152 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:50:29,152 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:50:29,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 09:50:29,367 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:50:29,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:50:29,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1813051472, now seen corresponding path program 42 times [2021-01-06 09:50:29,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:50:29,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902587840] [2021-01-06 09:50:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:50:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:50:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:50:30,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902587840] [2021-01-06 09:50:30,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381651500] [2021-01-06 09:50:30,615 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