/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-lopstr16/scalar_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:12:11,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:12:11,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:12:11,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:12:11,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:12:11,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:12:11,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:12:11,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:12:11,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:12:11,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:12:11,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:12:11,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:12:11,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:12:11,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:12:11,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:12:11,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:12:11,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:12:11,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:12:11,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:12:11,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:12:11,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:12:11,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:12:11,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:12:11,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:12:11,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:12:11,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:12:11,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:12:11,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:12:11,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:12:11,538 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:12:11,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:12:11,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:12:11,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:12:11,544 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:12:11,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:12:11,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:12:11,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:12:11,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:12:11,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:12:11,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:12:11,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:12:11,547 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:12:11,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:12:11,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:12:11,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:12:11,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:12:11,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:12:11,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:12:11,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:12:11,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:12:11,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:12:11,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:12:11,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:12:11,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:12:11,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:12:11,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:12:11,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:12:11,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:12:11,949 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:12:11,950 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:12:11,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i [2020-12-23 01:12:12,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/50d64ae71/d5312ff18c6a445fa75a6602d92fc978/FLAGaf0bd7fce [2020-12-23 01:12:12,770 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:12:12,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i [2020-12-23 01:12:12,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/50d64ae71/d5312ff18c6a445fa75a6602d92fc978/FLAGaf0bd7fce [2020-12-23 01:12:12,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/50d64ae71/d5312ff18c6a445fa75a6602d92fc978 [2020-12-23 01:12:12,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:12:12,825 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:12:12,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:12:12,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:12:12,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:12:12,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:12:12" (1/1) ... [2020-12-23 01:12:12,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e94e71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:12, skipping insertion in model container [2020-12-23 01:12:12,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:12:12" (1/1) ... [2020-12-23 01:12:12,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:12:12,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:12:13,178 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-lopstr16/scalar_loopdep.i[807,820] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]],n] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 01:12:13,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:12:14,907 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:12:14,927 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-lopstr16/scalar_loopdep.i[807,820] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 01:12:14,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:12:14,967 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:12:14,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:14 WrapperNode [2020-12-23 01:12:14,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:12:14,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:12:14,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:12:14,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:12:14,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:14" (1/1) ... [2020-12-23 01:12:14,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:14" (1/1) ... [2020-12-23 01:12:15,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:12:15,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:12:15,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:12:15,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:12:15,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:14" (1/1) ... [2020-12-23 01:12:15,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:14" (1/1) ... [2020-12-23 01:12:15,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:14" (1/1) ... [2020-12-23 01:12:15,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:14" (1/1) ... [2020-12-23 01:12:15,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:14" (1/1) ... [2020-12-23 01:12:15,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:14" (1/1) ... [2020-12-23 01:12:15,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:14" (1/1) ... [2020-12-23 01:12:15,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:12:15,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:12:15,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:12:15,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:12:15,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:12:15,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:12:15,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:12:15,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:12:15,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:12:15,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:12:15,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:12:15,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:12:15,619 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 01:12:15,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:12:15 BoogieIcfgContainer [2020-12-23 01:12:15,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:12:15,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:12:15,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:12:15,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:12:15,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:12:12" (1/3) ... [2020-12-23 01:12:15,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562a86d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:12:15, skipping insertion in model container [2020-12-23 01:12:15,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:14" (2/3) ... [2020-12-23 01:12:15,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562a86d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:12:15, skipping insertion in model container [2020-12-23 01:12:15,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:12:15" (3/3) ... [2020-12-23 01:12:15,632 INFO L111 eAbstractionObserver]: Analyzing ICFG scalar_loopdep.i [2020-12-23 01:12:15,641 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:12:15,647 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:12:15,672 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:12:15,704 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:12:15,704 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:12:15,705 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:12:15,705 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:12:15,705 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:12:15,705 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:12:15,705 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:12:15,705 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:12:15,726 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-23 01:12:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 01:12:15,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:15,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:15,743 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:15,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:15,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1807957391, now seen corresponding path program 1 times [2020-12-23 01:12:15,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:15,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456807040] [2020-12-23 01:12:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:16,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456807040] [2020-12-23 01:12:16,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:12:16,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:12:16,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603366289] [2020-12-23 01:12:16,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:12:16,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:16,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:12:16,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:12:16,245 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2020-12-23 01:12:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:16,298 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2020-12-23 01:12:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:12:16,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 01:12:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:16,314 INFO L225 Difference]: With dead ends: 34 [2020-12-23 01:12:16,314 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 01:12:16,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:12:16,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 01:12:16,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 12. [2020-12-23 01:12:16,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 01:12:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-23 01:12:16,362 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2020-12-23 01:12:16,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:16,363 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-23 01:12:16,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:12:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-23 01:12:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 01:12:16,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:16,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:16,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:12:16,365 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:16,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:16,366 INFO L82 PathProgramCache]: Analyzing trace with hash -369319347, now seen corresponding path program 1 times [2020-12-23 01:12:16,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:16,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595310704] [2020-12-23 01:12:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:16,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595310704] [2020-12-23 01:12:16,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039908220] [2020-12-23 01:12:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:16,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 01:12:16,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:16,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:16,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 01:12:16,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649545646] [2020-12-23 01:12:16,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:12:16,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:16,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:12:16,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:12:16,630 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2020-12-23 01:12:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:16,679 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-23 01:12:16,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:12:16,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 01:12:16,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:16,681 INFO L225 Difference]: With dead ends: 34 [2020-12-23 01:12:16,681 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 01:12:16,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:12:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 01:12:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 14. [2020-12-23 01:12:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 01:12:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-23 01:12:16,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2020-12-23 01:12:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:16,689 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-23 01:12:16,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:12:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-23 01:12:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 01:12:16,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:16,690 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:16,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 01:12:16,906 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:16,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:16,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1083191413, now seen corresponding path program 2 times [2020-12-23 01:12:16,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:16,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947913403] [2020-12-23 01:12:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:17,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947913403] [2020-12-23 01:12:17,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369989631] [2020-12-23 01:12:17,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:17,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:17,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:17,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 01:12:17,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:17,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:17,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 01:12:17,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862257830] [2020-12-23 01:12:17,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:12:17,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:17,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:12:17,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:12:17,191 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2020-12-23 01:12:17,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:17,250 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-23 01:12:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 01:12:17,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 01:12:17,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:17,252 INFO L225 Difference]: With dead ends: 42 [2020-12-23 01:12:17,252 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 01:12:17,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:12:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 01:12:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 16. [2020-12-23 01:12:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 01:12:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-23 01:12:17,259 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-12-23 01:12:17,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:17,259 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-23 01:12:17,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:12:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-23 01:12:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 01:12:17,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:17,260 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:17,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:17,474 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:17,476 INFO L82 PathProgramCache]: Analyzing trace with hash 80520521, now seen corresponding path program 3 times [2020-12-23 01:12:17,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:17,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400463727] [2020-12-23 01:12:17,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:17,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400463727] [2020-12-23 01:12:17,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371335837] [2020-12-23 01:12:17,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:17,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 01:12:17,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:17,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 01:12:17,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:17,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:17,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 01:12:17,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32365290] [2020-12-23 01:12:17,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:12:17,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:17,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:12:17,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:12:17,724 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 7 states. [2020-12-23 01:12:17,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:17,823 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-23 01:12:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:12:17,824 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 01:12:17,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:17,827 INFO L225 Difference]: With dead ends: 50 [2020-12-23 01:12:17,828 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 01:12:17,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:12:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 01:12:17,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 18. [2020-12-23 01:12:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 01:12:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 01:12:17,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-12-23 01:12:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:17,846 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 01:12:17,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:12:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 01:12:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 01:12:17,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:17,848 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:18,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:18,063 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1716192135, now seen corresponding path program 4 times [2020-12-23 01:12:18,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:18,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813965352] [2020-12-23 01:12:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:18,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813965352] [2020-12-23 01:12:18,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880755743] [2020-12-23 01:12:18,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:18,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:18,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:18,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:12:18,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:18,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:18,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 01:12:18,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747526433] [2020-12-23 01:12:18,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 01:12:18,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:18,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 01:12:18,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:12:18,346 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-12-23 01:12:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:18,426 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-23 01:12:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:12:18,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-23 01:12:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:18,428 INFO L225 Difference]: With dead ends: 58 [2020-12-23 01:12:18,428 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 01:12:18,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:12:18,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 01:12:18,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 20. [2020-12-23 01:12:18,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 01:12:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-23 01:12:18,434 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-12-23 01:12:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:18,435 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-23 01:12:18,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 01:12:18,435 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-23 01:12:18,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 01:12:18,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:18,436 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:18,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:18,651 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:18,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:18,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1638582853, now seen corresponding path program 5 times [2020-12-23 01:12:18,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:18,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623200607] [2020-12-23 01:12:18,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:18,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623200607] [2020-12-23 01:12:18,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461548618] [2020-12-23 01:12:18,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:18,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 01:12:18,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:18,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 01:12:18,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:19,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:19,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 01:12:19,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833441178] [2020-12-23 01:12:19,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:12:19,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:19,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:12:19,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:12:19,010 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-12-23 01:12:19,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:19,107 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-12-23 01:12:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:12:19,108 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-23 01:12:19,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:19,109 INFO L225 Difference]: With dead ends: 66 [2020-12-23 01:12:19,109 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 01:12:19,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:12:19,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 01:12:19,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 22. [2020-12-23 01:12:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 01:12:19,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-23 01:12:19,115 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2020-12-23 01:12:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:19,116 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-23 01:12:19,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:12:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-23 01:12:19,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 01:12:19,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:19,117 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:19,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 01:12:19,331 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:19,332 INFO L82 PathProgramCache]: Analyzing trace with hash 70506883, now seen corresponding path program 6 times [2020-12-23 01:12:19,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:19,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23946924] [2020-12-23 01:12:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:19,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23946924] [2020-12-23 01:12:19,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132319506] [2020-12-23 01:12:19,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:19,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 01:12:19,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:19,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:12:19,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:19,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:19,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 01:12:19,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105564524] [2020-12-23 01:12:19,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:12:19,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:19,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:12:19,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:12:19,593 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-12-23 01:12:19,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:19,688 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-12-23 01:12:19,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:12:19,689 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-23 01:12:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:19,690 INFO L225 Difference]: With dead ends: 74 [2020-12-23 01:12:19,690 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 01:12:19,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:12:19,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 01:12:19,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 24. [2020-12-23 01:12:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 01:12:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 01:12:19,698 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-12-23 01:12:19,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:19,698 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 01:12:19,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:12:19,698 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 01:12:19,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:12:19,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:19,699 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:19,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:19,912 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:19,913 INFO L82 PathProgramCache]: Analyzing trace with hash 683020609, now seen corresponding path program 7 times [2020-12-23 01:12:19,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:19,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213519855] [2020-12-23 01:12:19,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:20,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213519855] [2020-12-23 01:12:20,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237071925] [2020-12-23 01:12:20,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:20,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 01:12:20,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:20,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:20,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 01:12:20,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638868109] [2020-12-23 01:12:20,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:12:20,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:20,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:12:20,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:12:20,199 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-12-23 01:12:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:20,310 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-12-23 01:12:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:12:20,311 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-12-23 01:12:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:20,312 INFO L225 Difference]: With dead ends: 82 [2020-12-23 01:12:20,313 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 01:12:20,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:12:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 01:12:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 26. [2020-12-23 01:12:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 01:12:20,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-23 01:12:20,320 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-12-23 01:12:20,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:20,321 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-23 01:12:20,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:12:20,321 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-23 01:12:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 01:12:20,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:20,322 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:20,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:20,536 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:20,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:20,538 INFO L82 PathProgramCache]: Analyzing trace with hash 898191743, now seen corresponding path program 8 times [2020-12-23 01:12:20,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:20,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693082079] [2020-12-23 01:12:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:20,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693082079] [2020-12-23 01:12:20,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200785668] [2020-12-23 01:12:20,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:20,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:20,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:20,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 01:12:20,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:20,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:20,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 01:12:20,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480716720] [2020-12-23 01:12:20,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 01:12:20,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:20,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 01:12:20,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:12:20,839 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2020-12-23 01:12:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:20,943 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-12-23 01:12:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:12:20,944 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-12-23 01:12:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:20,945 INFO L225 Difference]: With dead ends: 90 [2020-12-23 01:12:20,945 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 01:12:20,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:12:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 01:12:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 28. [2020-12-23 01:12:20,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 01:12:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-23 01:12:20,953 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2020-12-23 01:12:20,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:20,954 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-23 01:12:20,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 01:12:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-23 01:12:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 01:12:20,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:20,955 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:21,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 01:12:21,169 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:21,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:21,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1519221309, now seen corresponding path program 9 times [2020-12-23 01:12:21,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:21,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134713240] [2020-12-23 01:12:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:21,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134713240] [2020-12-23 01:12:21,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731310511] [2020-12-23 01:12:21,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:21,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 01:12:21,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:21,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 01:12:21,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:21,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:21,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 01:12:21,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967764223] [2020-12-23 01:12:21,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:12:21,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:21,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:12:21,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:12:21,730 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 13 states. [2020-12-23 01:12:21,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:21,864 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-12-23 01:12:21,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:12:21,865 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-12-23 01:12:21,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:21,866 INFO L225 Difference]: With dead ends: 98 [2020-12-23 01:12:21,866 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 01:12:21,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:12:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 01:12:21,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 30. [2020-12-23 01:12:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 01:12:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-23 01:12:21,873 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2020-12-23 01:12:21,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:21,874 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-23 01:12:21,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:12:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-23 01:12:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 01:12:21,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:21,875 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:22,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:22,089 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:22,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1328180091, now seen corresponding path program 10 times [2020-12-23 01:12:22,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:22,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683866624] [2020-12-23 01:12:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:22,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683866624] [2020-12-23 01:12:22,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470052234] [2020-12-23 01:12:22,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:22,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:22,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:22,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:12:22,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:22,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:22,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 01:12:22,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167578828] [2020-12-23 01:12:22,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 01:12:22,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:22,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 01:12:22,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:12:22,391 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 14 states. [2020-12-23 01:12:22,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:22,499 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-12-23 01:12:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 01:12:22,501 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-12-23 01:12:22,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:22,502 INFO L225 Difference]: With dead ends: 106 [2020-12-23 01:12:22,502 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 01:12:22,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:12:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 01:12:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 32. [2020-12-23 01:12:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 01:12:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-23 01:12:22,508 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-12-23 01:12:22,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:22,509 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-23 01:12:22,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 01:12:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-23 01:12:22,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 01:12:22,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:22,510 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:22,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:22,725 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:22,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:22,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1873803975, now seen corresponding path program 11 times [2020-12-23 01:12:22,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:22,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988276992] [2020-12-23 01:12:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:22,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988276992] [2020-12-23 01:12:22,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139152873] [2020-12-23 01:12:22,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:23,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 01:12:23,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:23,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 01:12:23,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:23,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:23,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 01:12:23,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813799730] [2020-12-23 01:12:23,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 01:12:23,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:23,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 01:12:23,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:12:23,137 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2020-12-23 01:12:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:23,267 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-12-23 01:12:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:12:23,268 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-12-23 01:12:23,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:23,269 INFO L225 Difference]: With dead ends: 114 [2020-12-23 01:12:23,270 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 01:12:23,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:12:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 01:12:23,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 34. [2020-12-23 01:12:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 01:12:23,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-23 01:12:23,276 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2020-12-23 01:12:23,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:23,277 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-23 01:12:23,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:12:23,277 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-23 01:12:23,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 01:12:23,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:23,279 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:23,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 01:12:23,493 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:23,494 INFO L82 PathProgramCache]: Analyzing trace with hash 511059831, now seen corresponding path program 12 times [2020-12-23 01:12:23,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:23,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178910234] [2020-12-23 01:12:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:23,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178910234] [2020-12-23 01:12:23,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051263650] [2020-12-23 01:12:23,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:24,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 01:12:24,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:24,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:12:24,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:24,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:24,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 01:12:24,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030287892] [2020-12-23 01:12:24,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:12:24,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:12:24,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:12:24,156 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 16 states. [2020-12-23 01:12:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:24,318 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-12-23 01:12:24,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:12:24,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-12-23 01:12:24,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:24,320 INFO L225 Difference]: With dead ends: 122 [2020-12-23 01:12:24,321 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 01:12:24,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:12:24,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 01:12:24,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 36. [2020-12-23 01:12:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 01:12:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 01:12:24,332 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-12-23 01:12:24,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:24,335 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 01:12:24,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:12:24,335 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 01:12:24,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 01:12:24,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:24,340 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:24,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 01:12:24,543 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:24,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:24,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1147358667, now seen corresponding path program 13 times [2020-12-23 01:12:24,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:24,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037766499] [2020-12-23 01:12:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:24,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037766499] [2020-12-23 01:12:24,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417476171] [2020-12-23 01:12:24,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 01:12:24,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:25,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:25,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 01:12:25,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100938086] [2020-12-23 01:12:25,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 01:12:25,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 01:12:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:12:25,092 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 17 states. [2020-12-23 01:12:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:25,241 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2020-12-23 01:12:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:12:25,242 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-12-23 01:12:25,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:25,243 INFO L225 Difference]: With dead ends: 130 [2020-12-23 01:12:25,244 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 01:12:25,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:12:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 01:12:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 38. [2020-12-23 01:12:25,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 01:12:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-23 01:12:25,252 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2020-12-23 01:12:25,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:25,252 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-23 01:12:25,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 01:12:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-23 01:12:25,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 01:12:25,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:25,254 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:25,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 01:12:25,468 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:25,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1454668429, now seen corresponding path program 14 times [2020-12-23 01:12:25,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:25,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120661374] [2020-12-23 01:12:25,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:25,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120661374] [2020-12-23 01:12:25,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100993197] [2020-12-23 01:12:25,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:25,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:25,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:25,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:12:25,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:25,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:25,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 01:12:25,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624504863] [2020-12-23 01:12:25,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 01:12:25,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:25,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 01:12:25,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:12:25,890 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 18 states. [2020-12-23 01:12:26,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:26,055 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-12-23 01:12:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:12:26,056 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-12-23 01:12:26,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:26,057 INFO L225 Difference]: With dead ends: 138 [2020-12-23 01:12:26,057 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 01:12:26,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:12:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 01:12:26,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 40. [2020-12-23 01:12:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 01:12:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-23 01:12:26,065 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2020-12-23 01:12:26,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:26,065 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-23 01:12:26,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 01:12:26,065 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-23 01:12:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 01:12:26,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:26,066 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:26,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:26,279 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:26,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:26,280 INFO L82 PathProgramCache]: Analyzing trace with hash -426606287, now seen corresponding path program 15 times [2020-12-23 01:12:26,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:26,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990909672] [2020-12-23 01:12:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:26,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990909672] [2020-12-23 01:12:26,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804954727] [2020-12-23 01:12:26,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:27,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 01:12:27,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:27,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 01:12:27,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:27,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:27,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 01:12:27,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250248189] [2020-12-23 01:12:27,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:12:27,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:27,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:12:27,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:12:27,117 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 19 states. [2020-12-23 01:12:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:27,296 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2020-12-23 01:12:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:12:27,298 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-12-23 01:12:27,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:27,300 INFO L225 Difference]: With dead ends: 146 [2020-12-23 01:12:27,300 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 01:12:27,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:12:27,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 01:12:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 42. [2020-12-23 01:12:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 01:12:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-23 01:12:27,316 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2020-12-23 01:12:27,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:27,318 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-23 01:12:27,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:12:27,319 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-23 01:12:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 01:12:27,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:27,320 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:27,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 01:12:27,529 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:27,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:27,530 INFO L82 PathProgramCache]: Analyzing trace with hash -301365905, now seen corresponding path program 16 times [2020-12-23 01:12:27,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:27,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589447085] [2020-12-23 01:12:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:27,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589447085] [2020-12-23 01:12:27,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296280226] [2020-12-23 01:12:27,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:27,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:27,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:27,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:12:27,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:27,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:27,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 01:12:27,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714734997] [2020-12-23 01:12:27,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 01:12:27,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:27,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 01:12:27,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:12:27,998 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 20 states. [2020-12-23 01:12:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:28,191 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2020-12-23 01:12:28,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 01:12:28,192 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-12-23 01:12:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:28,193 INFO L225 Difference]: With dead ends: 154 [2020-12-23 01:12:28,193 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 01:12:28,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:12:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 01:12:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 44. [2020-12-23 01:12:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 01:12:28,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-23 01:12:28,200 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2020-12-23 01:12:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:28,200 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-23 01:12:28,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 01:12:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-23 01:12:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 01:12:28,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:28,202 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:28,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 01:12:28,417 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:28,418 INFO L82 PathProgramCache]: Analyzing trace with hash -204443091, now seen corresponding path program 17 times [2020-12-23 01:12:28,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:28,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677595702] [2020-12-23 01:12:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:28,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677595702] [2020-12-23 01:12:28,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363189198] [2020-12-23 01:12:28,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:28,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 01:12:28,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:28,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 01:12:28,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:29,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:29,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 01:12:29,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978030796] [2020-12-23 01:12:29,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 01:12:29,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:29,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 01:12:29,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:12:29,064 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 21 states. [2020-12-23 01:12:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:29,241 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-12-23 01:12:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 01:12:29,242 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-12-23 01:12:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:29,244 INFO L225 Difference]: With dead ends: 162 [2020-12-23 01:12:29,244 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 01:12:29,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:12:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 01:12:29,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 46. [2020-12-23 01:12:29,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 01:12:29,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-23 01:12:29,251 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2020-12-23 01:12:29,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:29,251 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-23 01:12:29,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 01:12:29,251 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-23 01:12:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 01:12:29,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:29,252 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:29,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 01:12:29,467 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:29,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1550899349, now seen corresponding path program 18 times [2020-12-23 01:12:29,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:29,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291062374] [2020-12-23 01:12:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:29,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291062374] [2020-12-23 01:12:29,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165488714] [2020-12-23 01:12:29,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:30,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 01:12:30,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:30,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 01:12:30,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:30,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:30,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 01:12:30,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207865840] [2020-12-23 01:12:30,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 01:12:30,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:30,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 01:12:30,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:12:30,734 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 22 states. [2020-12-23 01:12:30,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:30,900 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2020-12-23 01:12:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 01:12:30,901 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2020-12-23 01:12:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:30,902 INFO L225 Difference]: With dead ends: 170 [2020-12-23 01:12:30,902 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 01:12:30,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:12:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 01:12:30,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 48. [2020-12-23 01:12:30,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 01:12:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 01:12:30,907 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2020-12-23 01:12:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:30,907 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 01:12:30,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 01:12:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 01:12:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 01:12:30,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:30,908 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:31,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:31,118 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:31,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1584760105, now seen corresponding path program 19 times [2020-12-23 01:12:31,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:31,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909242593] [2020-12-23 01:12:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:31,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909242593] [2020-12-23 01:12:31,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964840459] [2020-12-23 01:12:31,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:31,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 01:12:31,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:31,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:31,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 01:12:31,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195323901] [2020-12-23 01:12:31,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 01:12:31,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:31,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 01:12:31,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:12:31,641 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 23 states. [2020-12-23 01:12:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:31,841 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2020-12-23 01:12:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:12:31,841 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2020-12-23 01:12:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:31,842 INFO L225 Difference]: With dead ends: 178 [2020-12-23 01:12:31,843 INFO L226 Difference]: Without dead ends: 171 [2020-12-23 01:12:31,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:12:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-23 01:12:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 50. [2020-12-23 01:12:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 01:12:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-23 01:12:31,848 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2020-12-23 01:12:31,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:31,849 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-23 01:12:31,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 01:12:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-23 01:12:31,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 01:12:31,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:31,850 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:32,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:32,059 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:32,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:32,060 INFO L82 PathProgramCache]: Analyzing trace with hash -113546393, now seen corresponding path program 20 times [2020-12-23 01:12:32,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:32,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463543506] [2020-12-23 01:12:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:32,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463543506] [2020-12-23 01:12:32,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963861950] [2020-12-23 01:12:32,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:32,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:32,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:32,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 01:12:32,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:32,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:32,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 01:12:32,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991270340] [2020-12-23 01:12:32,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 01:12:32,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:32,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 01:12:32,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:12:32,642 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 24 states. [2020-12-23 01:12:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:32,835 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2020-12-23 01:12:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 01:12:32,836 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2020-12-23 01:12:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:32,837 INFO L225 Difference]: With dead ends: 186 [2020-12-23 01:12:32,837 INFO L226 Difference]: Without dead ends: 179 [2020-12-23 01:12:32,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:12:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-23 01:12:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 52. [2020-12-23 01:12:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 01:12:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-23 01:12:32,842 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2020-12-23 01:12:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:32,843 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-23 01:12:32,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 01:12:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-23 01:12:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:12:32,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:32,844 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:33,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 01:12:33,059 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:33,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:33,060 INFO L82 PathProgramCache]: Analyzing trace with hash -98518491, now seen corresponding path program 21 times [2020-12-23 01:12:33,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:33,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890562167] [2020-12-23 01:12:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:33,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890562167] [2020-12-23 01:12:33,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800354035] [2020-12-23 01:12:33,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:35,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 01:12:35,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:35,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 01:12:35,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:35,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:35,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 01:12:35,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061984626] [2020-12-23 01:12:35,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 01:12:35,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:35,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 01:12:35,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:12:35,938 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 25 states. [2020-12-23 01:12:36,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:36,151 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2020-12-23 01:12:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 01:12:36,154 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2020-12-23 01:12:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:36,155 INFO L225 Difference]: With dead ends: 194 [2020-12-23 01:12:36,156 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 01:12:36,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:12:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 01:12:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 54. [2020-12-23 01:12:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 01:12:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-23 01:12:36,161 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2020-12-23 01:12:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:36,161 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-23 01:12:36,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 01:12:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-23 01:12:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 01:12:36,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:36,163 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:36,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 01:12:36,377 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:36,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:36,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1458393443, now seen corresponding path program 22 times [2020-12-23 01:12:36,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:36,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006364929] [2020-12-23 01:12:36,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:36,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006364929] [2020-12-23 01:12:36,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479020979] [2020-12-23 01:12:36,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:36,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:36,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:36,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 01:12:36,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:36,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:36,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 01:12:36,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532172922] [2020-12-23 01:12:36,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 01:12:36,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:36,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 01:12:36,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:12:36,996 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 26 states. [2020-12-23 01:12:37,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:37,234 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-12-23 01:12:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 01:12:37,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2020-12-23 01:12:37,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:37,236 INFO L225 Difference]: With dead ends: 202 [2020-12-23 01:12:37,236 INFO L226 Difference]: Without dead ends: 195 [2020-12-23 01:12:37,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:12:37,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-23 01:12:37,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 56. [2020-12-23 01:12:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 01:12:37,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-23 01:12:37,241 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2020-12-23 01:12:37,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:37,241 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-23 01:12:37,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 01:12:37,242 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-23 01:12:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 01:12:37,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:37,243 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:37,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:37,456 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:37,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:37,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1292824287, now seen corresponding path program 23 times [2020-12-23 01:12:37,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:37,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237983811] [2020-12-23 01:12:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:37,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237983811] [2020-12-23 01:12:37,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905773067] [2020-12-23 01:12:37,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:38,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 01:12:38,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:38,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 01:12:38,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:38,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:38,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 01:12:38,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840114891] [2020-12-23 01:12:38,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 01:12:38,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:38,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 01:12:38,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:12:38,748 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 27 states. [2020-12-23 01:12:38,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:38,982 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2020-12-23 01:12:38,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 01:12:38,983 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2020-12-23 01:12:38,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:38,985 INFO L225 Difference]: With dead ends: 210 [2020-12-23 01:12:38,985 INFO L226 Difference]: Without dead ends: 203 [2020-12-23 01:12:38,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:12:38,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-23 01:12:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 58. [2020-12-23 01:12:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 01:12:38,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-12-23 01:12:38,990 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2020-12-23 01:12:38,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:38,991 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-12-23 01:12:38,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 01:12:38,991 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-12-23 01:12:38,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 01:12:38,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:38,992 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:39,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 01:12:39,202 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:39,203 INFO L82 PathProgramCache]: Analyzing trace with hash 486791519, now seen corresponding path program 24 times [2020-12-23 01:12:39,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:39,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111643861] [2020-12-23 01:12:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:39,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111643861] [2020-12-23 01:12:39,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584001417] [2020-12-23 01:12:39,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:44,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 01:12:44,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:44,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 01:12:44,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:44,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:44,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 01:12:44,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741437832] [2020-12-23 01:12:44,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 01:12:44,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:44,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 01:12:44,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:12:44,713 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 28 states. [2020-12-23 01:12:44,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:44,987 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2020-12-23 01:12:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 01:12:44,988 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2020-12-23 01:12:44,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:44,990 INFO L225 Difference]: With dead ends: 218 [2020-12-23 01:12:44,990 INFO L226 Difference]: Without dead ends: 211 [2020-12-23 01:12:44,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:12:44,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-23 01:12:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 60. [2020-12-23 01:12:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 01:12:44,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-12-23 01:12:44,996 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2020-12-23 01:12:44,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:44,997 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-12-23 01:12:44,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 01:12:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-12-23 01:12:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 01:12:44,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:44,998 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:45,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:45,214 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:45,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:45,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1300597277, now seen corresponding path program 25 times [2020-12-23 01:12:45,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:45,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166138533] [2020-12-23 01:12:45,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:45,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166138533] [2020-12-23 01:12:45,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434967406] [2020-12-23 01:12:45,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:45,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 01:12:45,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:45,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:45,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 01:12:45,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61100662] [2020-12-23 01:12:45,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 01:12:45,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:45,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 01:12:45,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 01:12:45,926 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 29 states. [2020-12-23 01:12:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:46,197 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2020-12-23 01:12:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 01:12:46,198 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2020-12-23 01:12:46,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:46,199 INFO L225 Difference]: With dead ends: 226 [2020-12-23 01:12:46,199 INFO L226 Difference]: Without dead ends: 219 [2020-12-23 01:12:46,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 01:12:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-23 01:12:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 62. [2020-12-23 01:12:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 01:12:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-12-23 01:12:46,204 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2020-12-23 01:12:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:46,205 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-12-23 01:12:46,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 01:12:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-12-23 01:12:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 01:12:46,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:46,206 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:46,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 01:12:46,419 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:46,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:46,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1683882843, now seen corresponding path program 26 times [2020-12-23 01:12:46,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:46,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799595553] [2020-12-23 01:12:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:47,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799595553] [2020-12-23 01:12:47,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318589630] [2020-12-23 01:12:47,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:47,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:47,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:47,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 01:12:47,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:47,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:47,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 01:12:47,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460966665] [2020-12-23 01:12:47,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 01:12:47,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:47,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 01:12:47,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 01:12:47,228 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 30 states. [2020-12-23 01:12:47,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:47,516 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2020-12-23 01:12:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 01:12:47,516 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2020-12-23 01:12:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:47,518 INFO L225 Difference]: With dead ends: 234 [2020-12-23 01:12:47,519 INFO L226 Difference]: Without dead ends: 227 [2020-12-23 01:12:47,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 01:12:47,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-23 01:12:47,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 64. [2020-12-23 01:12:47,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 01:12:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-12-23 01:12:47,525 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2020-12-23 01:12:47,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:47,525 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-12-23 01:12:47,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 01:12:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-12-23 01:12:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 01:12:47,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:47,526 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:47,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 01:12:47,740 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash 654124313, now seen corresponding path program 27 times [2020-12-23 01:12:47,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:47,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706507234] [2020-12-23 01:12:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:48,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706507234] [2020-12-23 01:12:48,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694332772] [2020-12-23 01:12:48,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:57,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 01:12:57,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:57,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 01:12:57,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:57,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:57,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 01:12:57,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941532409] [2020-12-23 01:12:57,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 01:12:57,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:57,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 01:12:57,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:12:57,754 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 31 states. [2020-12-23 01:12:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:58,070 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-12-23 01:12:58,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 01:12:58,071 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2020-12-23 01:12:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:58,072 INFO L225 Difference]: With dead ends: 242 [2020-12-23 01:12:58,073 INFO L226 Difference]: Without dead ends: 235 [2020-12-23 01:12:58,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:12:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-12-23 01:12:58,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 66. [2020-12-23 01:12:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 01:12:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-23 01:12:58,078 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2020-12-23 01:12:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:58,078 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-23 01:12:58,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 01:12:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-23 01:12:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 01:12:58,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:58,079 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:58,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 01:12:58,281 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:58,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:58,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1101344937, now seen corresponding path program 28 times [2020-12-23 01:12:58,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:58,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410866420] [2020-12-23 01:12:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:58,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410866420] [2020-12-23 01:12:58,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710516227] [2020-12-23 01:12:58,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:59,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:59,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:59,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 01:12:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:59,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:59,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 01:12:59,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371664924] [2020-12-23 01:12:59,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 01:12:59,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:59,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 01:12:59,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 01:12:59,168 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 32 states. [2020-12-23 01:12:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:59,505 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2020-12-23 01:12:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 01:12:59,506 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2020-12-23 01:12:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:59,507 INFO L225 Difference]: With dead ends: 250 [2020-12-23 01:12:59,508 INFO L226 Difference]: Without dead ends: 243 [2020-12-23 01:12:59,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 01:12:59,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-23 01:12:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 68. [2020-12-23 01:12:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 01:12:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-12-23 01:12:59,514 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2020-12-23 01:12:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:59,514 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-12-23 01:12:59,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 01:12:59,515 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-12-23 01:12:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 01:12:59,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:59,515 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:59,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 01:12:59,730 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:59,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:59,731 INFO L82 PathProgramCache]: Analyzing trace with hash -185146859, now seen corresponding path program 29 times [2020-12-23 01:12:59,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:59,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549582908] [2020-12-23 01:12:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:00,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549582908] [2020-12-23 01:13:00,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913931870] [2020-12-23 01:13:00,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:01,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 01:13:01,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:01,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 01:13:01,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:01,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:01,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 01:13:01,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296363544] [2020-12-23 01:13:01,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 01:13:01,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:01,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 01:13:01,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 01:13:01,302 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 33 states. [2020-12-23 01:13:01,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:01,559 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2020-12-23 01:13:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 01:13:01,560 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2020-12-23 01:13:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:01,561 INFO L225 Difference]: With dead ends: 258 [2020-12-23 01:13:01,562 INFO L226 Difference]: Without dead ends: 251 [2020-12-23 01:13:01,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 01:13:01,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-23 01:13:01,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 70. [2020-12-23 01:13:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 01:13:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-12-23 01:13:01,566 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2020-12-23 01:13:01,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:01,567 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-12-23 01:13:01,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 01:13:01,567 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-12-23 01:13:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 01:13:01,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:01,568 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:01,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:01,781 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:01,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:01,781 INFO L82 PathProgramCache]: Analyzing trace with hash -187089581, now seen corresponding path program 30 times [2020-12-23 01:13:01,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:01,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362827946] [2020-12-23 01:13:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:02,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362827946] [2020-12-23 01:13:02,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539349761] [2020-12-23 01:13:02,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:23,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 01:13:23,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:23,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 01:13:23,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:23,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:23,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 01:13:23,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759109460] [2020-12-23 01:13:23,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 01:13:23,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:23,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 01:13:23,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 01:13:23,982 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 34 states. [2020-12-23 01:13:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:24,313 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2020-12-23 01:13:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 01:13:24,314 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2020-12-23 01:13:24,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:24,315 INFO L225 Difference]: With dead ends: 266 [2020-12-23 01:13:24,315 INFO L226 Difference]: Without dead ends: 259 [2020-12-23 01:13:24,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 01:13:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-23 01:13:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 72. [2020-12-23 01:13:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 01:13:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-23 01:13:24,320 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2020-12-23 01:13:24,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:24,321 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-23 01:13:24,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 01:13:24,321 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-23 01:13:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 01:13:24,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:24,322 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:24,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:24,523 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:24,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2054045423, now seen corresponding path program 31 times [2020-12-23 01:13:24,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:24,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084828846] [2020-12-23 01:13:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:25,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084828846] [2020-12-23 01:13:25,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64354528] [2020-12-23 01:13:25,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:25,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 01:13:25,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:25,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:25,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 01:13:25,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385836487] [2020-12-23 01:13:25,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 01:13:25,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:25,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 01:13:25,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 01:13:25,414 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 35 states. [2020-12-23 01:13:25,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:25,745 INFO L93 Difference]: Finished difference Result 274 states and 276 transitions. [2020-12-23 01:13:25,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 01:13:25,745 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2020-12-23 01:13:25,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:25,747 INFO L225 Difference]: With dead ends: 274 [2020-12-23 01:13:25,747 INFO L226 Difference]: Without dead ends: 267 [2020-12-23 01:13:25,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 01:13:25,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-23 01:13:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 74. [2020-12-23 01:13:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 01:13:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-12-23 01:13:25,752 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 69 [2020-12-23 01:13:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:25,752 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-12-23 01:13:25,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 01:13:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-12-23 01:13:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 01:13:25,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:25,753 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:25,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:25,967 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:25,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:25,968 INFO L82 PathProgramCache]: Analyzing trace with hash -902279857, now seen corresponding path program 32 times [2020-12-23 01:13:25,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:25,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793604226] [2020-12-23 01:13:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:26,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793604226] [2020-12-23 01:13:26,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229807585] [2020-12-23 01:13:26,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:26,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:13:26,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:26,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 01:13:26,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:26,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:26,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 01:13:26,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183365914] [2020-12-23 01:13:26,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 01:13:26,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:26,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 01:13:26,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 01:13:26,974 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 36 states. [2020-12-23 01:13:27,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:27,338 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2020-12-23 01:13:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 01:13:27,338 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2020-12-23 01:13:27,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:27,340 INFO L225 Difference]: With dead ends: 282 [2020-12-23 01:13:27,340 INFO L226 Difference]: Without dead ends: 275 [2020-12-23 01:13:27,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 01:13:27,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-23 01:13:27,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 76. [2020-12-23 01:13:27,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 01:13:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-12-23 01:13:27,346 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2020-12-23 01:13:27,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:27,347 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-12-23 01:13:27,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 01:13:27,347 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-12-23 01:13:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 01:13:27,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:27,348 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:27,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 01:13:27,563 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:27,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:27,563 INFO L82 PathProgramCache]: Analyzing trace with hash 2137833997, now seen corresponding path program 33 times [2020-12-23 01:13:27,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:27,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154469429] [2020-12-23 01:13:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:28,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154469429] [2020-12-23 01:13:28,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415873743] [2020-12-23 01:13:28,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:52,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-23 01:13:52,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:52,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 01:13:52,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:52,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:52,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 01:13:52,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540809461] [2020-12-23 01:13:52,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 01:13:52,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:52,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 01:13:52,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 01:13:52,308 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 37 states. [2020-12-23 01:13:52,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:52,673 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2020-12-23 01:13:52,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 01:13:52,674 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2020-12-23 01:13:52,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:52,676 INFO L225 Difference]: With dead ends: 290 [2020-12-23 01:13:52,676 INFO L226 Difference]: Without dead ends: 283 [2020-12-23 01:13:52,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 01:13:52,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-23 01:13:52,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 78. [2020-12-23 01:13:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 01:13:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-12-23 01:13:52,682 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2020-12-23 01:13:52,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:52,683 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-12-23 01:13:52,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 01:13:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-12-23 01:13:52,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 01:13:52,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:52,684 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:52,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:52,899 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:52,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:52,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1185480885, now seen corresponding path program 34 times [2020-12-23 01:13:52,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:52,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808861962] [2020-12-23 01:13:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:53,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808861962] [2020-12-23 01:13:53,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818648398] [2020-12-23 01:13:53,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:53,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:13:53,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:53,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 01:13:53,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:53,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:53,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 01:13:53,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079712896] [2020-12-23 01:13:53,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 01:13:53,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:53,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 01:13:53,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 01:13:53,970 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 38 states. [2020-12-23 01:13:54,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:54,360 INFO L93 Difference]: Finished difference Result 298 states and 300 transitions. [2020-12-23 01:13:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 01:13:54,360 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2020-12-23 01:13:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:54,362 INFO L225 Difference]: With dead ends: 298 [2020-12-23 01:13:54,363 INFO L226 Difference]: Without dead ends: 291 [2020-12-23 01:13:54,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 01:13:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-23 01:13:54,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 80. [2020-12-23 01:13:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 01:13:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-12-23 01:13:54,370 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2020-12-23 01:13:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:54,370 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-12-23 01:13:54,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 01:13:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-12-23 01:13:54,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 01:13:54,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:54,372 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:54,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 01:13:54,585 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:54,586 INFO L82 PathProgramCache]: Analyzing trace with hash 564585737, now seen corresponding path program 35 times [2020-12-23 01:13:54,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:54,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007680453] [2020-12-23 01:13:54,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:55,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007680453] [2020-12-23 01:13:55,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706083206] [2020-12-23 01:13:55,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:57,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-23 01:13:57,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:57,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 01:13:57,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:57,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:57,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 01:13:57,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001151715] [2020-12-23 01:13:57,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 01:13:57,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:57,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 01:13:57,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 01:13:57,432 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 39 states. [2020-12-23 01:13:57,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:57,860 INFO L93 Difference]: Finished difference Result 306 states and 308 transitions. [2020-12-23 01:13:57,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 01:13:57,860 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2020-12-23 01:13:57,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:57,862 INFO L225 Difference]: With dead ends: 306 [2020-12-23 01:13:57,862 INFO L226 Difference]: Without dead ends: 299 [2020-12-23 01:13:57,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 01:13:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-23 01:13:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 82. [2020-12-23 01:13:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 01:13:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-12-23 01:13:57,867 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2020-12-23 01:13:57,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:57,867 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-12-23 01:13:57,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 01:13:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-12-23 01:13:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 01:13:57,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:57,868 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:58,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:58,082 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:58,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:58,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1248570553, now seen corresponding path program 36 times [2020-12-23 01:13:58,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:58,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610690227] [2020-12-23 01:13:58,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:59,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610690227] [2020-12-23 01:13:59,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124777440] [2020-12-23 01:13:59,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:39,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-23 01:14:39,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:14:39,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 01:14:39,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:14:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:14:39,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:14:39,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 01:14:39,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951215982] [2020-12-23 01:14:39,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 01:14:39,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:14:39,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 01:14:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:14:39,925 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 40 states. [2020-12-23 01:14:40,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:14:40,344 INFO L93 Difference]: Finished difference Result 314 states and 316 transitions. [2020-12-23 01:14:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 01:14:40,345 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2020-12-23 01:14:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:14:40,347 INFO L225 Difference]: With dead ends: 314 [2020-12-23 01:14:40,347 INFO L226 Difference]: Without dead ends: 307 [2020-12-23 01:14:40,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:14:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-23 01:14:40,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 84. [2020-12-23 01:14:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 01:14:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-12-23 01:14:40,353 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2020-12-23 01:14:40,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:14:40,353 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-12-23 01:14:40,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 01:14:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-12-23 01:14:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 01:14:40,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:14:40,354 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:14:40,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 01:14:40,568 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:14:40,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:14:40,568 INFO L82 PathProgramCache]: Analyzing trace with hash 64956933, now seen corresponding path program 37 times [2020-12-23 01:14:40,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:14:40,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638297061] [2020-12-23 01:14:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:14:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:14:41,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638297061] [2020-12-23 01:14:41,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479750528] [2020-12-23 01:14:41,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:41,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 01:14:41,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:14:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:14:41,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:14:41,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 01:14:41,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562256929] [2020-12-23 01:14:41,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 01:14:41,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:14:41,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 01:14:41,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 01:14:41,754 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 41 states. [2020-12-23 01:14:42,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:14:42,133 INFO L93 Difference]: Finished difference Result 322 states and 324 transitions. [2020-12-23 01:14:42,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 01:14:42,133 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2020-12-23 01:14:42,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:14:42,135 INFO L225 Difference]: With dead ends: 322 [2020-12-23 01:14:42,135 INFO L226 Difference]: Without dead ends: 315 [2020-12-23 01:14:42,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 01:14:42,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-12-23 01:14:42,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 86. [2020-12-23 01:14:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 01:14:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-12-23 01:14:42,142 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2020-12-23 01:14:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:14:42,143 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-12-23 01:14:42,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 01:14:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-12-23 01:14:42,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 01:14:42,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:14:42,144 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:14:42,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 01:14:42,359 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:14:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:14:42,360 INFO L82 PathProgramCache]: Analyzing trace with hash -355514045, now seen corresponding path program 38 times [2020-12-23 01:14:42,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:14:42,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992808261] [2020-12-23 01:14:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:14:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:14:43,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992808261] [2020-12-23 01:14:43,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69345866] [2020-12-23 01:14:43,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:43,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:14:43,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:14:43,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 01:14:43,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:14:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:14:43,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:14:43,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 01:14:43,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016823606] [2020-12-23 01:14:43,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 01:14:43,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:14:43,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 01:14:43,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 01:14:43,672 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 42 states. [2020-12-23 01:14:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:14:44,112 INFO L93 Difference]: Finished difference Result 330 states and 332 transitions. [2020-12-23 01:14:44,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 01:14:44,112 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2020-12-23 01:14:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:14:44,114 INFO L225 Difference]: With dead ends: 330 [2020-12-23 01:14:44,114 INFO L226 Difference]: Without dead ends: 323 [2020-12-23 01:14:44,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 01:14:44,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-12-23 01:14:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 88. [2020-12-23 01:14:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 01:14:44,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-12-23 01:14:44,120 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2020-12-23 01:14:44,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:14:44,120 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-12-23 01:14:44,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 01:14:44,120 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-12-23 01:14:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 01:14:44,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:14:44,121 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:14:44,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 01:14:44,335 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:14:44,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:14:44,335 INFO L82 PathProgramCache]: Analyzing trace with hash -701198079, now seen corresponding path program 39 times [2020-12-23 01:14:44,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:14:44,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118172311] [2020-12-23 01:14:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:14:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:14:45,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118172311] [2020-12-23 01:14:45,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057133485] [2020-12-23 01:14:45,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:15:51,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 01:15:51,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:15:51,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 01:15:51,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:15:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:15:51,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:15:51,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 01:15:51,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826483418] [2020-12-23 01:15:51,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 01:15:51,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:15:51,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 01:15:51,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 01:15:51,552 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 43 states. [2020-12-23 01:15:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:15:52,005 INFO L93 Difference]: Finished difference Result 338 states and 340 transitions. [2020-12-23 01:15:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 01:15:52,006 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2020-12-23 01:15:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:15:52,007 INFO L225 Difference]: With dead ends: 338 [2020-12-23 01:15:52,007 INFO L226 Difference]: Without dead ends: 331 [2020-12-23 01:15:52,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 01:15:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-12-23 01:15:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 90. [2020-12-23 01:15:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 01:15:52,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-12-23 01:15:52,014 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 85 [2020-12-23 01:15:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:15:52,014 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-12-23 01:15:52,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 01:15:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-12-23 01:15:52,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 01:15:52,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:15:52,015 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:15:52,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 01:15:52,229 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:15:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:15:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2103894335, now seen corresponding path program 40 times [2020-12-23 01:15:52,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:15:52,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256527407] [2020-12-23 01:15:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:15:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:15:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:15:53,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256527407] [2020-12-23 01:15:53,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84749611] [2020-12-23 01:15:53,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:15:53,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:15:53,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:15:53,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 01:15:53,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:15:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:15:53,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:15:53,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 01:15:53,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137679481] [2020-12-23 01:15:53,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 01:15:53,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:15:53,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 01:15:53,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 01:15:53,593 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 44 states. [2020-12-23 01:15:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:15:54,151 INFO L93 Difference]: Finished difference Result 346 states and 348 transitions. [2020-12-23 01:15:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 01:15:54,154 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2020-12-23 01:15:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:15:54,156 INFO L225 Difference]: With dead ends: 346 [2020-12-23 01:15:54,156 INFO L226 Difference]: Without dead ends: 339 [2020-12-23 01:15:54,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 01:15:54,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-23 01:15:54,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 92. [2020-12-23 01:15:54,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 01:15:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-12-23 01:15:54,163 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2020-12-23 01:15:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:15:54,164 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-12-23 01:15:54,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 01:15:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-12-23 01:15:54,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 01:15:54,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:15:54,168 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:15:54,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:15:54,382 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:15:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:15:54,383 INFO L82 PathProgramCache]: Analyzing trace with hash 558242301, now seen corresponding path program 41 times [2020-12-23 01:15:54,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:15:54,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629351718] [2020-12-23 01:15:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:15:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:15:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:15:55,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629351718] [2020-12-23 01:15:55,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400787045] [2020-12-23 01:15:55,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:15:58,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 01:15:58,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:15:58,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 01:15:58,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:15:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:15:58,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:15:58,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 01:15:58,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020013241] [2020-12-23 01:15:58,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 01:15:58,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:15:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 01:15:58,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 01:15:58,393 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 45 states. [2020-12-23 01:15:58,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:15:58,931 INFO L93 Difference]: Finished difference Result 354 states and 356 transitions. [2020-12-23 01:15:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 01:15:58,931 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2020-12-23 01:15:58,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:15:58,933 INFO L225 Difference]: With dead ends: 354 [2020-12-23 01:15:58,934 INFO L226 Difference]: Without dead ends: 347 [2020-12-23 01:15:58,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 01:15:58,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-12-23 01:15:58,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 94. [2020-12-23 01:15:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 01:15:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-12-23 01:15:58,939 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2020-12-23 01:15:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:15:58,940 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-12-23 01:15:58,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 01:15:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-12-23 01:15:58,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 01:15:58,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:15:58,941 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:15:59,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 01:15:59,156 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:15:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:15:59,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1245322043, now seen corresponding path program 42 times [2020-12-23 01:15:59,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:15:59,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864622734] [2020-12-23 01:15:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:15:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:16:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:16:00,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864622734] [2020-12-23 01:16:00,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964084111] [2020-12-23 01:16:00,475 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