/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:06:51,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:06:51,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:06:51,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:06:51,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:06:51,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:06:51,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:06:51,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:06:51,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:06:51,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:06:51,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:06:51,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:06:51,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:06:51,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:06:51,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:06:51,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:06:51,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:06:51,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:06:51,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:06:51,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:06:51,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:06:51,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:06:51,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:06:51,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:06:51,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:06:51,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:06:51,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:06:51,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:06:51,944 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 00:06:51,971 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:06:51,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:06:51,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:06:51,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:06:51,974 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:06:51,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:06:51,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:06:51,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:06:51,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:06:51,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:06:51,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:06:51,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:06:51,976 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:06:51,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:06:51,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:06:51,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:06:51,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:06:51,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:06:51,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:06:51,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:06:51,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:06:51,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:06:51,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:06:51,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:06:51,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:06:51,978 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:06:52,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:06:52,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:06:52,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:06:52,443 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:06:52,444 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:06:52,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2020-12-23 00:06:52,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/51212bd1a/774dc2d5550d449498dd73127a1fbd95/FLAG032394d7f [2020-12-23 00:06:53,262 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:06:53,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2020-12-23 00:06:53,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/51212bd1a/774dc2d5550d449498dd73127a1fbd95/FLAG032394d7f [2020-12-23 00:06:53,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/51212bd1a/774dc2d5550d449498dd73127a1fbd95 [2020-12-23 00:06:53,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:06:53,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:06:53,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:06:53,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:06:53,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:06:53,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:06:53" (1/1) ... [2020-12-23 00:06:53,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e090d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:06:53, skipping insertion in model container [2020-12-23 00:06:53,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:06:53" (1/1) ... [2020-12-23 00:06:53,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:06:53,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:06:53,835 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i[819,832] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~max~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:06:53,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:06:53,867 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:06:53,882 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i[819,832] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~max~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:06:53,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:06:53,909 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:06:53,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:06:53 WrapperNode [2020-12-23 00:06:53,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:06:53,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:06:53,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:06:53,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:06:53,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:06:53" (1/1) ... [2020-12-23 00:06:53,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:06:53" (1/1) ... [2020-12-23 00:06:53,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:06:53,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:06:53,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:06:53,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:06:53,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:06:53" (1/1) ... [2020-12-23 00:06:53,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:06:53" (1/1) ... [2020-12-23 00:06:53,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:06:53" (1/1) ... [2020-12-23 00:06:53,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:06:53" (1/1) ... [2020-12-23 00:06:53,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:06:53" (1/1) ... [2020-12-23 00:06:53,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:06:53" (1/1) ... [2020-12-23 00:06:53,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:06:53" (1/1) ... [2020-12-23 00:06:53,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:06:53,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:06:53,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:06:53,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:06:53,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:06:53" (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 00:06:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:06:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:06:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:06:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:06:54,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:06:54,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:06:54,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:06:54,435 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:06:54,436 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 00:06:54,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:06:54 BoogieIcfgContainer [2020-12-23 00:06:54,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:06:54,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:06:54,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:06:54,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:06:54,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:06:53" (1/3) ... [2020-12-23 00:06:54,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19754158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:06:54, skipping insertion in model container [2020-12-23 00:06:54,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:06:53" (2/3) ... [2020-12-23 00:06:54,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19754158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:06:54, skipping insertion in model container [2020-12-23 00:06:54,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:06:54" (3/3) ... [2020-12-23 00:06:54,449 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2020-12-23 00:06:54,458 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:06:54,465 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:06:54,491 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:06:54,573 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:06:54,573 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:06:54,573 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:06:54,574 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:06:54,574 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:06:54,574 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:06:54,574 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:06:54,574 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:06:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 00:06:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:06:54,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:06:54,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:06:54,648 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:06:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:06:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2005182879, now seen corresponding path program 1 times [2020-12-23 00:06:54,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:06:54,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90107039] [2020-12-23 00:06:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:06:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:54,860 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 00:06:54,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90107039] [2020-12-23 00:06:54,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:06:54,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:06:54,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329862338] [2020-12-23 00:06:54,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:06:54,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:06:54,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:06:54,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:06:54,891 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-23 00:06:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:06:54,912 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-23 00:06:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:06:54,914 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 00:06:54,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:06:54,925 INFO L225 Difference]: With dead ends: 34 [2020-12-23 00:06:54,926 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 00:06:54,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:06:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 00:06:54,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 00:06:54,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 00:06:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-23 00:06:54,975 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-23 00:06:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:06:54,976 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-23 00:06:54,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:06:54,976 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-23 00:06:54,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:06:54,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:06:54,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:06:54,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:06:54,978 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:06:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:06:54,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2015341610, now seen corresponding path program 1 times [2020-12-23 00:06:54,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:06:54,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868121288] [2020-12-23 00:06:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:06:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:55,040 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 00:06:55,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868121288] [2020-12-23 00:06:55,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:06:55,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:06:55,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680836188] [2020-12-23 00:06:55,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:06:55,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:06:55,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:06:55,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:06:55,047 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2020-12-23 00:06:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:06:55,098 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-23 00:06:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:06:55,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 00:06:55,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:06:55,103 INFO L225 Difference]: With dead ends: 28 [2020-12-23 00:06:55,103 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 00:06:55,105 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 00:06:55,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 00:06:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-23 00:06:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 00:06:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-23 00:06:55,114 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2020-12-23 00:06:55,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:06:55,116 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-23 00:06:55,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:06:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-23 00:06:55,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:06:55,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:06:55,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:06:55,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:06:55,120 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:06:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:06:55,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1565753620, now seen corresponding path program 1 times [2020-12-23 00:06:55,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:06:55,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989782809] [2020-12-23 00:06:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:06:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:55,200 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 00:06:55,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989782809] [2020-12-23 00:06:55,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909372119] [2020-12-23 00:06:55,201 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 00:06:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:55,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:06:55,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:06:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:06:55,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:06:55,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:06:55,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441510033] [2020-12-23 00:06:55,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:06:55,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:06:55,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:06:55,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:06:55,334 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2020-12-23 00:06:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:06:55,358 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-12-23 00:06:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:06:55,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-23 00:06:55,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:06:55,360 INFO L225 Difference]: With dead ends: 26 [2020-12-23 00:06:55,361 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 00:06:55,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:06:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 00:06:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-12-23 00:06:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 00:06:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-23 00:06:55,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2020-12-23 00:06:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:06:55,366 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-23 00:06:55,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:06:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-23 00:06:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:06:55,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:06:55,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:06:55,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:06:55,582 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:06:55,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:06:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1959207727, now seen corresponding path program 1 times [2020-12-23 00:06:55,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:06:55,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138211230] [2020-12-23 00:06:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:06:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:06:55,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138211230] [2020-12-23 00:06:55,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708414045] [2020-12-23 00:06:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:06:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:06:55,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:06:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:06:55,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:06:55,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:06:55,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971525663] [2020-12-23 00:06:55,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:06:55,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:06:55,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:06:55,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:06:55,826 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-12-23 00:06:55,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:06:55,875 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-12-23 00:06:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:06:55,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 00:06:55,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:06:55,880 INFO L225 Difference]: With dead ends: 32 [2020-12-23 00:06:55,880 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 00:06:55,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 00:06:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 00:06:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-23 00:06:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 00:06:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-23 00:06:55,890 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2020-12-23 00:06:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:06:55,891 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-23 00:06:55,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:06:55,891 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-23 00:06:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:06:55,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:06:55,892 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:06:56,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:06:56,107 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:06:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:06:56,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1501972051, now seen corresponding path program 2 times [2020-12-23 00:06:56,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:06:56,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628533303] [2020-12-23 00:06:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:06:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:06:56,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628533303] [2020-12-23 00:06:56,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772531505] [2020-12-23 00:06:56,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:06:56,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:06:56,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:06:56,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:06:56,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:06:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:06:56,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:06:56,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 00:06:56,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225254492] [2020-12-23 00:06:56,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:06:56,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:06:56,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:06:56,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:06:56,311 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2020-12-23 00:06:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:06:56,384 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-12-23 00:06:56,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:06:56,385 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 00:06:56,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:06:56,386 INFO L225 Difference]: With dead ends: 39 [2020-12-23 00:06:56,386 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 00:06:56,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:06:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 00:06:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-23 00:06:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:06:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-23 00:06:56,394 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-12-23 00:06:56,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:06:56,394 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-23 00:06:56,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:06:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-23 00:06:56,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:06:56,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:06:56,395 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:06:56,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:06:56,610 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:06:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:06:56,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1207096048, now seen corresponding path program 3 times [2020-12-23 00:06:56,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:06:56,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076488417] [2020-12-23 00:06:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:06:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:06:56,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076488417] [2020-12-23 00:06:56,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498590213] [2020-12-23 00:06:56,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:06:56,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:06:56,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:06:56,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:06:56,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:06:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 00:06:56,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:06:56,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-23 00:06:56,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4401829] [2020-12-23 00:06:56,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:06:56,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:06:56,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:06:56,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:06:56,848 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 9 states. [2020-12-23 00:06:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:06:56,919 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-12-23 00:06:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:06:56,920 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-23 00:06:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:06:56,921 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:06:56,921 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 00:06:56,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:06:56,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 00:06:56,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-12-23 00:06:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:06:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-12-23 00:06:56,929 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 21 [2020-12-23 00:06:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:06:56,930 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-12-23 00:06:56,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:06:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-12-23 00:06:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:06:56,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:06:56,931 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:06:57,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:06:57,146 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:06:57,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:06:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1223744631, now seen corresponding path program 4 times [2020-12-23 00:06:57,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:06:57,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880054817] [2020-12-23 00:06:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:06:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:06:57,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880054817] [2020-12-23 00:06:57,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906482048] [2020-12-23 00:06:57,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:06:57,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:06:57,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:06:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:06:57,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:06:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:06:57,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:06:57,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:06:57,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818297649] [2020-12-23 00:06:57,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:06:57,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:06:57,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:06:57,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:06:57,445 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 8 states. [2020-12-23 00:06:57,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:06:57,475 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-12-23 00:06:57,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:06:57,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-23 00:06:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:06:57,477 INFO L225 Difference]: With dead ends: 50 [2020-12-23 00:06:57,477 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 00:06:57,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 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 00:06:57,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 00:06:57,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-23 00:06:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:06:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-23 00:06:57,483 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 26 [2020-12-23 00:06:57,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:06:57,483 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-23 00:06:57,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:06:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-23 00:06:57,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:06:57,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:06:57,485 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:06:57,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:06:57,700 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:06:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:06:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash -403565831, now seen corresponding path program 5 times [2020-12-23 00:06:57,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:06:57,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855233959] [2020-12-23 00:06:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:06:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:06:57,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855233959] [2020-12-23 00:06:57,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137720158] [2020-12-23 00:06:57,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:06:57,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:06:57,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:06:57,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:06:57,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:06:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 00:06:57,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:06:57,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-23 00:06:57,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52600063] [2020-12-23 00:06:57,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:06:57,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:06:57,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:06:57,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:06:57,966 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 12 states. [2020-12-23 00:06:58,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:06:58,043 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-12-23 00:06:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:06:58,043 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-23 00:06:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:06:58,044 INFO L225 Difference]: With dead ends: 57 [2020-12-23 00:06:58,044 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 00:06:58,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:06:58,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 00:06:58,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-23 00:06:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 00:06:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-12-23 00:06:58,052 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 28 [2020-12-23 00:06:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:06:58,052 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-12-23 00:06:58,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:06:58,053 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-12-23 00:06:58,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:06:58,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:06:58,054 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:06:58,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:06:58,268 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:06:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:06:58,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1934839690, now seen corresponding path program 6 times [2020-12-23 00:06:58,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:06:58,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881016605] [2020-12-23 00:06:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:06:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:06:58,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881016605] [2020-12-23 00:06:58,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011585529] [2020-12-23 00:06:58,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:06:58,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:06:58,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:06:58,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:06:58,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:06:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:06:58,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:06:58,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-23 00:06:58,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005696422] [2020-12-23 00:06:58,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:06:58,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:06:58,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:06:58,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:06:58,589 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 14 states. [2020-12-23 00:06:58,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:06:58,701 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-12-23 00:06:58,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:06:58,702 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-12-23 00:06:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:06:58,707 INFO L225 Difference]: With dead ends: 65 [2020-12-23 00:06:58,707 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 00:06:58,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:06:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 00:06:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-12-23 00:06:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 00:06:58,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-12-23 00:06:58,729 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 33 [2020-12-23 00:06:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:06:58,730 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-12-23 00:06:58,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:06:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-12-23 00:06:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:06:58,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:06:58,734 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:06:58,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:06:58,936 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:06:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:06:58,937 INFO L82 PathProgramCache]: Analyzing trace with hash 172781213, now seen corresponding path program 7 times [2020-12-23 00:06:58,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:06:58,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037592961] [2020-12-23 00:06:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:06:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:06:59,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037592961] [2020-12-23 00:06:59,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715972040] [2020-12-23 00:06:59,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:06:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:59,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:06:59,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:06:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:06:59,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:06:59,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:06:59,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519196882] [2020-12-23 00:06:59,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:06:59,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:06:59,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:06:59,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:06:59,262 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 11 states. [2020-12-23 00:06:59,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:06:59,303 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2020-12-23 00:06:59,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:06:59,303 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-12-23 00:06:59,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:06:59,304 INFO L225 Difference]: With dead ends: 68 [2020-12-23 00:06:59,304 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 00:06:59,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 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 00:06:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 00:06:59,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-23 00:06:59,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 00:06:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-12-23 00:06:59,310 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 38 [2020-12-23 00:06:59,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:06:59,311 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-12-23 00:06:59,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:06:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-12-23 00:06:59,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 00:06:59,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:06:59,312 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:06:59,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:06:59,527 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:06:59,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:06:59,529 INFO L82 PathProgramCache]: Analyzing trace with hash -239734241, now seen corresponding path program 8 times [2020-12-23 00:06:59,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:06:59,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116709096] [2020-12-23 00:06:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:06:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:06:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:06:59,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116709096] [2020-12-23 00:06:59,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630229923] [2020-12-23 00:06:59,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:06:59,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:06:59,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:06:59,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:06:59,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:06:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:06:59,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:06:59,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:06:59,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12715127] [2020-12-23 00:06:59,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:06:59,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:06:59,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:06:59,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:06:59,810 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 12 states. [2020-12-23 00:06:59,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:06:59,849 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2020-12-23 00:06:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:06:59,850 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-12-23 00:06:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:06:59,851 INFO L225 Difference]: With dead ends: 70 [2020-12-23 00:06:59,851 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 00:06:59,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 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 00:06:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 00:06:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-23 00:06:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 00:06:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-12-23 00:06:59,882 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 40 [2020-12-23 00:06:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:06:59,882 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-12-23 00:06:59,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:06:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-12-23 00:06:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 00:06:59,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:06:59,885 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:00,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:00,100 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:00,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:00,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1530094303, now seen corresponding path program 9 times [2020-12-23 00:07:00,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:00,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885679560] [2020-12-23 00:07:00,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:07:00,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885679560] [2020-12-23 00:07:00,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492391258] [2020-12-23 00:07:00,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:00,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:07:00,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:00,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:07:00,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 00:07:00,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:00,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-23 00:07:00,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100423115] [2020-12-23 00:07:00,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:07:00,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:00,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:07:00,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:07:00,513 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 18 states. [2020-12-23 00:07:00,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:00,615 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-12-23 00:07:00,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:07:00,615 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-12-23 00:07:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:00,616 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:07:00,616 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 00:07:00,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:07:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 00:07:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-12-23 00:07:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 00:07:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-12-23 00:07:00,623 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 42 [2020-12-23 00:07:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:00,623 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-12-23 00:07:00,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:07:00,624 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-12-23 00:07:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:07:00,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:00,625 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:00,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:00,839 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:00,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1935274014, now seen corresponding path program 10 times [2020-12-23 00:07:00,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:00,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416271469] [2020-12-23 00:07:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:07:01,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416271469] [2020-12-23 00:07:01,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543498611] [2020-12-23 00:07:01,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:01,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:01,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:01,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:07:01,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:07:01,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:01,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:07:01,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398091765] [2020-12-23 00:07:01,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:07:01,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:01,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:07:01,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:07:01,192 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 14 states. [2020-12-23 00:07:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:01,247 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-12-23 00:07:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:07:01,248 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-12-23 00:07:01,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:01,249 INFO L225 Difference]: With dead ends: 80 [2020-12-23 00:07:01,249 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 00:07:01,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:07:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 00:07:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-23 00:07:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:07:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-12-23 00:07:01,255 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 47 [2020-12-23 00:07:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:01,255 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-12-23 00:07:01,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:07:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-12-23 00:07:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:07:01,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:01,256 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:01,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:07:01,470 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:01,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:01,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1920246112, now seen corresponding path program 11 times [2020-12-23 00:07:01,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:01,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800579637] [2020-12-23 00:07:01,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:07:01,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800579637] [2020-12-23 00:07:01,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42827846] [2020-12-23 00:07:01,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:01,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 00:07:01,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:01,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:07:01,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:07:01,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:01,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 00:07:01,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097753037] [2020-12-23 00:07:01,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:07:01,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:01,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:07:01,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:07:01,913 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 15 states. [2020-12-23 00:07:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:01,972 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2020-12-23 00:07:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:07:01,973 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-12-23 00:07:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:01,974 INFO L225 Difference]: With dead ends: 82 [2020-12-23 00:07:01,974 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 00:07:01,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 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 00:07:01,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 00:07:01,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-23 00:07:01,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 00:07:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-12-23 00:07:01,988 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 49 [2020-12-23 00:07:01,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:01,989 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-12-23 00:07:01,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:07:01,989 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-12-23 00:07:01,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:07:01,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:01,991 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:02,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:07:02,206 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:02,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:02,207 INFO L82 PathProgramCache]: Analyzing trace with hash -363334178, now seen corresponding path program 12 times [2020-12-23 00:07:02,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:02,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901890348] [2020-12-23 00:07:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:07:02,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901890348] [2020-12-23 00:07:02,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304736601] [2020-12-23 00:07:02,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:02,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:07:02,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:02,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:07:02,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:07:02,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:02,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2020-12-23 00:07:02,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984123443] [2020-12-23 00:07:02,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:07:02,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:02,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:07:02,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:07:02,801 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 22 states. [2020-12-23 00:07:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:02,925 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2020-12-23 00:07:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:07:02,925 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-12-23 00:07:02,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:02,926 INFO L225 Difference]: With dead ends: 89 [2020-12-23 00:07:02,926 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 00:07:02,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:07:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 00:07:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-12-23 00:07:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 00:07:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-12-23 00:07:02,932 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 51 [2020-12-23 00:07:02,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:02,933 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-12-23 00:07:02,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:07:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-12-23 00:07:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 00:07:02,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:02,934 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:03,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:07:03,148 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1122895031, now seen corresponding path program 13 times [2020-12-23 00:07:03,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:03,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738913287] [2020-12-23 00:07:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:03,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738913287] [2020-12-23 00:07:03,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574186913] [2020-12-23 00:07:03,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:03,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:07:03,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:03,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:03,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:07:03,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796809428] [2020-12-23 00:07:03,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:07:03,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:03,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:07:03,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:07:03,559 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 17 states. [2020-12-23 00:07:03,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:03,625 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2020-12-23 00:07:03,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:07:03,626 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 56 [2020-12-23 00:07:03,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:03,626 INFO L225 Difference]: With dead ends: 92 [2020-12-23 00:07:03,627 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 00:07:03,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 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 00:07:03,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 00:07:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-23 00:07:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 00:07:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-12-23 00:07:03,632 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 56 [2020-12-23 00:07:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:03,633 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-12-23 00:07:03,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:07:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-12-23 00:07:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:07:03,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:03,634 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:03,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:03,850 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:03,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:03,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1664720309, now seen corresponding path program 14 times [2020-12-23 00:07:03,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:03,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560422473] [2020-12-23 00:07:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:04,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560422473] [2020-12-23 00:07:04,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565290505] [2020-12-23 00:07:04,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:04,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:04,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:04,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:07:04,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:04,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:04,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 00:07:04,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158974701] [2020-12-23 00:07:04,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:07:04,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:04,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:07:04,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:07:04,289 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 18 states. [2020-12-23 00:07:04,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:04,350 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2020-12-23 00:07:04,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:07:04,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-12-23 00:07:04,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:04,351 INFO L225 Difference]: With dead ends: 94 [2020-12-23 00:07:04,351 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 00:07:04,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 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 00:07:04,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 00:07:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-23 00:07:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 00:07:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-12-23 00:07:04,358 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 58 [2020-12-23 00:07:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:04,358 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-12-23 00:07:04,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:07:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-12-23 00:07:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 00:07:04,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:04,359 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:04,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:07:04,574 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:04,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:04,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1627197645, now seen corresponding path program 15 times [2020-12-23 00:07:04,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:04,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573810035] [2020-12-23 00:07:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:04,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573810035] [2020-12-23 00:07:04,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803695237] [2020-12-23 00:07:04,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:04,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:07:04,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:04,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:07:04,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 00:07:05,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:05,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2020-12-23 00:07:05,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108756504] [2020-12-23 00:07:05,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:07:05,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:05,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:07:05,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:07:05,109 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 26 states. [2020-12-23 00:07:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:05,230 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2020-12-23 00:07:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:07:05,231 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-12-23 00:07:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:05,232 INFO L225 Difference]: With dead ends: 101 [2020-12-23 00:07:05,232 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 00:07:05,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:07:05,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 00:07:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-12-23 00:07:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 00:07:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-12-23 00:07:05,237 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 60 [2020-12-23 00:07:05,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:05,238 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-12-23 00:07:05,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:07:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-12-23 00:07:05,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 00:07:05,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:05,239 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:05,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:07:05,453 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:05,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:05,454 INFO L82 PathProgramCache]: Analyzing trace with hash -220128970, now seen corresponding path program 16 times [2020-12-23 00:07:05,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:05,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485214105] [2020-12-23 00:07:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:07:05,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485214105] [2020-12-23 00:07:05,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953428266] [2020-12-23 00:07:05,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:05,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:05,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:05,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:07:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:07:05,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:05,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:07:05,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903124356] [2020-12-23 00:07:05,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:07:05,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:05,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:07:05,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:07:05,861 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 20 states. [2020-12-23 00:07:05,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:05,948 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-12-23 00:07:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:07:05,948 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-12-23 00:07:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:05,949 INFO L225 Difference]: With dead ends: 104 [2020-12-23 00:07:05,949 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 00:07:05,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:07:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 00:07:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-23 00:07:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 00:07:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-12-23 00:07:05,954 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 65 [2020-12-23 00:07:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:05,954 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-12-23 00:07:05,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:07:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-12-23 00:07:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 00:07:05,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:05,955 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:06,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:06,169 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash -222071692, now seen corresponding path program 17 times [2020-12-23 00:07:06,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:06,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380416966] [2020-12-23 00:07:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:07:06,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380416966] [2020-12-23 00:07:06,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810278367] [2020-12-23 00:07:06,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:06,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 00:07:06,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:06,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:07:06,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:07:06,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:06,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 00:07:06,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454102805] [2020-12-23 00:07:06,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:07:06,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:06,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:07:06,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:07:06,824 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 21 states. [2020-12-23 00:07:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:06,897 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-12-23 00:07:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:07:06,897 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-12-23 00:07:06,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:06,898 INFO L225 Difference]: With dead ends: 106 [2020-12-23 00:07:06,898 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 00:07:06,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 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 00:07:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 00:07:06,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-23 00:07:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 00:07:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2020-12-23 00:07:06,903 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 67 [2020-12-23 00:07:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:06,903 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2020-12-23 00:07:06,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:07:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2020-12-23 00:07:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:07:06,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:06,904 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:07,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:07,119 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:07,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2089027534, now seen corresponding path program 18 times [2020-12-23 00:07:07,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:07,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943121887] [2020-12-23 00:07:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:07:07,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943121887] [2020-12-23 00:07:07,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304747842] [2020-12-23 00:07:07,428 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 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 00:07:07,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 00:07:07,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:07,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:07:07,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:07:08,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:08,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2020-12-23 00:07:08,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838286515] [2020-12-23 00:07:08,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:07:08,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:08,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:07:08,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:07:08,004 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 30 states. [2020-12-23 00:07:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:08,164 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2020-12-23 00:07:08,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:07:08,165 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-12-23 00:07:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:08,166 INFO L225 Difference]: With dead ends: 113 [2020-12-23 00:07:08,166 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 00:07:08,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:07:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 00:07:08,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-12-23 00:07:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 00:07:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-12-23 00:07:08,170 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 69 [2020-12-23 00:07:08,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:08,171 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-12-23 00:07:08,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:07:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-12-23 00:07:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 00:07:08,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:08,172 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:08,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:08,386 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:08,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:08,387 INFO L82 PathProgramCache]: Analyzing trace with hash -74396683, now seen corresponding path program 19 times [2020-12-23 00:07:08,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:08,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864543435] [2020-12-23 00:07:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:07:08,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864543435] [2020-12-23 00:07:08,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135177713] [2020-12-23 00:07:08,740 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 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 00:07:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:08,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:07:08,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:07:08,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:08,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:07:08,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234388537] [2020-12-23 00:07:08,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:07:08,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:08,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:07:08,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:07:08,921 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 23 states. [2020-12-23 00:07:08,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:08,997 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-12-23 00:07:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:07:08,998 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 74 [2020-12-23 00:07:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:08,999 INFO L225 Difference]: With dead ends: 116 [2020-12-23 00:07:08,999 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 00:07:09,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 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 00:07:09,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 00:07:09,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-23 00:07:09,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 00:07:09,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-12-23 00:07:09,004 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 74 [2020-12-23 00:07:09,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:09,004 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-12-23 00:07:09,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:07:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-12-23 00:07:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 00:07:09,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:09,006 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:09,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:07:09,220 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:09,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:09,221 INFO L82 PathProgramCache]: Analyzing trace with hash -17942921, now seen corresponding path program 20 times [2020-12-23 00:07:09,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:09,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454566787] [2020-12-23 00:07:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:07:09,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454566787] [2020-12-23 00:07:09,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563812842] [2020-12-23 00:07:09,580 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 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 00:07:09,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:09,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:09,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 00:07:09,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:07:09,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:09,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 00:07:09,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238779026] [2020-12-23 00:07:09,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:07:09,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:09,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:07:09,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:07:09,800 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 24 states. [2020-12-23 00:07:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:09,871 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-12-23 00:07:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 00:07:09,872 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2020-12-23 00:07:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:09,873 INFO L225 Difference]: With dead ends: 118 [2020-12-23 00:07:09,873 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 00:07:09,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 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 00:07:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 00:07:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-23 00:07:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 00:07:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2020-12-23 00:07:09,877 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 76 [2020-12-23 00:07:09,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:09,878 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2020-12-23 00:07:09,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:07:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2020-12-23 00:07:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 00:07:09,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:09,879 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:10,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:07:10,093 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:10,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:10,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1600452487, now seen corresponding path program 21 times [2020-12-23 00:07:10,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:10,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448847030] [2020-12-23 00:07:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:07:10,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448847030] [2020-12-23 00:07:10,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676274845] [2020-12-23 00:07:10,473 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 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 00:07:10,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:07:10,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:10,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:07:10,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-23 00:07:10,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:10,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12] total 34 [2020-12-23 00:07:10,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434072323] [2020-12-23 00:07:10,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:07:10,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:10,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:07:10,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:07:10,904 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 34 states. [2020-12-23 00:07:11,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:11,104 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2020-12-23 00:07:11,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:07:11,105 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2020-12-23 00:07:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:11,106 INFO L225 Difference]: With dead ends: 125 [2020-12-23 00:07:11,106 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 00:07:11,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:07:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 00:07:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-12-23 00:07:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 00:07:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2020-12-23 00:07:11,111 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 78 [2020-12-23 00:07:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:11,112 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2020-12-23 00:07:11,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:07:11,112 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2020-12-23 00:07:11,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 00:07:11,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:11,113 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:11,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:11,327 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:11,328 INFO L82 PathProgramCache]: Analyzing trace with hash -754057590, now seen corresponding path program 22 times [2020-12-23 00:07:11,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:11,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922312888] [2020-12-23 00:07:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 00:07:11,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922312888] [2020-12-23 00:07:11,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712801814] [2020-12-23 00:07:11,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:07:11,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:11,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:11,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:07:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-23 00:07:12,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:12,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2020-12-23 00:07:12,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671015840] [2020-12-23 00:07:12,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 00:07:12,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:12,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 00:07:12,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:07:12,157 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 36 states. [2020-12-23 00:07:12,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:12,399 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2020-12-23 00:07:12,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:07:12,400 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 83 [2020-12-23 00:07:12,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:12,401 INFO L225 Difference]: With dead ends: 133 [2020-12-23 00:07:12,401 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 00:07:12,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:07:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 00:07:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-12-23 00:07:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 00:07:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2020-12-23 00:07:12,407 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 83 [2020-12-23 00:07:12,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:12,407 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2020-12-23 00:07:12,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 00:07:12,407 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2020-12-23 00:07:12,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 00:07:12,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:12,409 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:12,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:07:12,625 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:12,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:12,626 INFO L82 PathProgramCache]: Analyzing trace with hash -77685987, now seen corresponding path program 23 times [2020-12-23 00:07:12,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:12,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057490891] [2020-12-23 00:07:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 00:07:13,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057490891] [2020-12-23 00:07:13,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566194966] [2020-12-23 00:07:13,028 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 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 00:07:13,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 00:07:13,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:13,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:07:13,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-23 00:07:14,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:14,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2020-12-23 00:07:14,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664614467] [2020-12-23 00:07:14,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 00:07:14,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:14,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 00:07:14,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:07:14,132 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand 38 states. [2020-12-23 00:07:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:14,349 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2020-12-23 00:07:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 00:07:14,350 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 88 [2020-12-23 00:07:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:14,351 INFO L225 Difference]: With dead ends: 141 [2020-12-23 00:07:14,351 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 00:07:14,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:07:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 00:07:14,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2020-12-23 00:07:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 00:07:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-12-23 00:07:14,356 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 88 [2020-12-23 00:07:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:14,356 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-12-23 00:07:14,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 00:07:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-12-23 00:07:14,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 00:07:14,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:14,358 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:14,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:14,572 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:14,573 INFO L82 PathProgramCache]: Analyzing trace with hash -182696986, now seen corresponding path program 24 times [2020-12-23 00:07:14,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:14,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238363757] [2020-12-23 00:07:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 00:07:15,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238363757] [2020-12-23 00:07:15,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32763972] [2020-12-23 00:07:15,037 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 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 00:07:17,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 00:07:17,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 00:07:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 00:07:17,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:17,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 00:07:17,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975999141] [2020-12-23 00:07:17,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:07:17,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:17,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:07:17,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:07:17,484 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 28 states. [2020-12-23 00:07:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:17,593 INFO L93 Difference]: Finished difference Result 144 states and 172 transitions. [2020-12-23 00:07:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:07:17,594 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 93 [2020-12-23 00:07:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:17,595 INFO L225 Difference]: With dead ends: 144 [2020-12-23 00:07:17,595 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 00:07:17,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:07:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 00:07:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-12-23 00:07:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 00:07:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2020-12-23 00:07:17,601 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 93 [2020-12-23 00:07:17,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:17,601 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2020-12-23 00:07:17,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:07:17,602 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2020-12-23 00:07:17,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 00:07:17,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:17,603 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:17,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:07:17,818 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:17,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1785629148, now seen corresponding path program 25 times [2020-12-23 00:07:17,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:17,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613002242] [2020-12-23 00:07:17,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 00:07:18,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613002242] [2020-12-23 00:07:18,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163882791] [2020-12-23 00:07:18,289 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 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 00:07:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:18,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:07:18,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 00:07:18,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:18,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 00:07:18,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312979772] [2020-12-23 00:07:18,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:07:18,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:18,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:07:18,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:07:18,508 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 29 states. [2020-12-23 00:07:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:18,606 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2020-12-23 00:07:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:07:18,606 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2020-12-23 00:07:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:18,607 INFO L225 Difference]: With dead ends: 146 [2020-12-23 00:07:18,608 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 00:07:18,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 95 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 00:07:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 00:07:18,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-12-23 00:07:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 00:07:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-12-23 00:07:18,612 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 95 [2020-12-23 00:07:18,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:18,613 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-12-23 00:07:18,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:07:18,613 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-12-23 00:07:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 00:07:18,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:18,614 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:18,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:07:18,829 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:18,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:18,830 INFO L82 PathProgramCache]: Analyzing trace with hash -310177566, now seen corresponding path program 26 times [2020-12-23 00:07:18,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:18,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476350268] [2020-12-23 00:07:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 00:07:19,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476350268] [2020-12-23 00:07:19,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66092787] [2020-12-23 00:07:19,372 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 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 00:07:19,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:19,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:19,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 00:07:19,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 00:07:19,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:19,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 00:07:19,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367725744] [2020-12-23 00:07:19,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:07:19,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:19,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:07:19,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:07:19,567 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 30 states. [2020-12-23 00:07:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:19,662 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2020-12-23 00:07:19,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:07:19,665 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 97 [2020-12-23 00:07:19,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:19,666 INFO L225 Difference]: With dead ends: 148 [2020-12-23 00:07:19,666 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 00:07:19,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:07:19,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 00:07:19,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-12-23 00:07:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 00:07:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2020-12-23 00:07:19,670 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 97 [2020-12-23 00:07:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:19,671 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2020-12-23 00:07:19,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:07:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2020-12-23 00:07:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 00:07:19,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:19,672 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:19,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:07:19,885 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:19,886 INFO L82 PathProgramCache]: Analyzing trace with hash 259585056, now seen corresponding path program 27 times [2020-12-23 00:07:19,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:19,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044835850] [2020-12-23 00:07:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 00:07:20,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044835850] [2020-12-23 00:07:20,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482437309] [2020-12-23 00:07:20,441 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 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 00:07:20,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-23 00:07:20,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:20,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:07:20,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-12-23 00:07:21,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:21,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15] total 43 [2020-12-23 00:07:21,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125084346] [2020-12-23 00:07:21,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:07:21,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:21,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:07:21,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:07:21,046 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand 43 states. [2020-12-23 00:07:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:21,315 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2020-12-23 00:07:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 00:07:21,315 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 99 [2020-12-23 00:07:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:21,316 INFO L225 Difference]: With dead ends: 155 [2020-12-23 00:07:21,316 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 00:07:21,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:07:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 00:07:21,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-12-23 00:07:21,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 00:07:21,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2020-12-23 00:07:21,321 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 99 [2020-12-23 00:07:21,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:21,322 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2020-12-23 00:07:21,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:07:21,322 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2020-12-23 00:07:21,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 00:07:21,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:21,323 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:21,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:21,538 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:21,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:21,539 INFO L82 PathProgramCache]: Analyzing trace with hash 877425095, now seen corresponding path program 28 times [2020-12-23 00:07:21,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:21,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716389949] [2020-12-23 00:07:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 00:07:22,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716389949] [2020-12-23 00:07:22,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259247114] [2020-12-23 00:07:22,173 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 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 00:07:22,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:22,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:22,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 00:07:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 00:07:22,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:22,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 00:07:22,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540247822] [2020-12-23 00:07:22,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:07:22,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:22,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:07:22,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:07:22,410 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand 32 states. [2020-12-23 00:07:22,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:22,525 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2020-12-23 00:07:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 00:07:22,526 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 104 [2020-12-23 00:07:22,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:22,527 INFO L225 Difference]: With dead ends: 158 [2020-12-23 00:07:22,527 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 00:07:22,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 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 00:07:22,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 00:07:22,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-12-23 00:07:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 00:07:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2020-12-23 00:07:22,532 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 104 [2020-12-23 00:07:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:22,533 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2020-12-23 00:07:22,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:07:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2020-12-23 00:07:22,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 00:07:22,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:22,533 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:22,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 00:07:22,741 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:22,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:22,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1207300919, now seen corresponding path program 29 times [2020-12-23 00:07:22,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:22,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665571495] [2020-12-23 00:07:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 00:07:23,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665571495] [2020-12-23 00:07:23,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543730930] [2020-12-23 00:07:23,377 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 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 00:07:24,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 00:07:24,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:24,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:07:24,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-12-23 00:07:25,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:25,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16] total 46 [2020-12-23 00:07:25,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764915860] [2020-12-23 00:07:25,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 00:07:25,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:25,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 00:07:25,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=1455, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:07:25,106 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand 46 states. [2020-12-23 00:07:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:25,386 INFO L93 Difference]: Finished difference Result 165 states and 198 transitions. [2020-12-23 00:07:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 00:07:25,388 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 106 [2020-12-23 00:07:25,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:25,389 INFO L225 Difference]: With dead ends: 165 [2020-12-23 00:07:25,389 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 00:07:25,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=615, Invalid=1455, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:07:25,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 00:07:25,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2020-12-23 00:07:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-23 00:07:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2020-12-23 00:07:25,394 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 106 [2020-12-23 00:07:25,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:25,395 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2020-12-23 00:07:25,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 00:07:25,395 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2020-12-23 00:07:25,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 00:07:25,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:25,396 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:25,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:25,609 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:25,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1187401926, now seen corresponding path program 30 times [2020-12-23 00:07:25,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:25,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760708954] [2020-12-23 00:07:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-23 00:07:26,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760708954] [2020-12-23 00:07:26,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751341146] [2020-12-23 00:07:26,241 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 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 00:07:28,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-23 00:07:28,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:28,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:07:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-12-23 00:07:28,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:28,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 17] total 48 [2020-12-23 00:07:28,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046953403] [2020-12-23 00:07:28,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 00:07:28,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:28,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 00:07:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:07:28,686 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand 48 states. [2020-12-23 00:07:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:28,968 INFO L93 Difference]: Finished difference Result 173 states and 208 transitions. [2020-12-23 00:07:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 00:07:28,969 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 111 [2020-12-23 00:07:28,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:28,970 INFO L225 Difference]: With dead ends: 173 [2020-12-23 00:07:28,970 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 00:07:28,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:07:28,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 00:07:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2020-12-23 00:07:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 00:07:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2020-12-23 00:07:28,975 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 111 [2020-12-23 00:07:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:28,976 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2020-12-23 00:07:28,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 00:07:28,976 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2020-12-23 00:07:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 00:07:28,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:28,977 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:29,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:07:29,190 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:29,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:29,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1343124845, now seen corresponding path program 31 times [2020-12-23 00:07:29,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:29,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2230205] [2020-12-23 00:07:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:07:29,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2230205] [2020-12-23 00:07:29,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188054016] [2020-12-23 00:07:29,873 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 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 00:07:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:29,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:07:29,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:07:30,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:30,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 00:07:30,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663908477] [2020-12-23 00:07:30,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:07:30,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:30,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:07:30,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:07:30,106 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand 35 states. [2020-12-23 00:07:30,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:30,250 INFO L93 Difference]: Finished difference Result 176 states and 210 transitions. [2020-12-23 00:07:30,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:07:30,251 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 116 [2020-12-23 00:07:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:30,252 INFO L225 Difference]: With dead ends: 176 [2020-12-23 00:07:30,252 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 00:07:30,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 116 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 00:07:30,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 00:07:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-12-23 00:07:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 00:07:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2020-12-23 00:07:30,264 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 116 [2020-12-23 00:07:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:30,264 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2020-12-23 00:07:30,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:07:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2020-12-23 00:07:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 00:07:30,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:30,270 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:30,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 00:07:30,485 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:30,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:30,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1380031855, now seen corresponding path program 32 times [2020-12-23 00:07:30,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:30,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291104996] [2020-12-23 00:07:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:07:31,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291104996] [2020-12-23 00:07:31,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478503478] [2020-12-23 00:07:31,182 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 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 00:07:31,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:31,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:31,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 00:07:31,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:07:31,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:31,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 00:07:31,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977042358] [2020-12-23 00:07:31,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 00:07:31,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:31,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 00:07:31,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:07:31,418 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand 36 states. [2020-12-23 00:07:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:31,533 INFO L93 Difference]: Finished difference Result 178 states and 212 transitions. [2020-12-23 00:07:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 00:07:31,534 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 118 [2020-12-23 00:07:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:31,535 INFO L225 Difference]: With dead ends: 178 [2020-12-23 00:07:31,535 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 00:07:31,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:07:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 00:07:31,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-12-23 00:07:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 00:07:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2020-12-23 00:07:31,540 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 118 [2020-12-23 00:07:31,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:31,541 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2020-12-23 00:07:31,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 00:07:31,541 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2020-12-23 00:07:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 00:07:31,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:31,542 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:31,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:07:31,757 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:31,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1807037199, now seen corresponding path program 33 times [2020-12-23 00:07:31,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:31,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290982887] [2020-12-23 00:07:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:07:32,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290982887] [2020-12-23 00:07:32,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79525608] [2020-12-23 00:07:32,556 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 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 00:07:32,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 00:07:32,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:32,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:07:32,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-12-23 00:07:33,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:33,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 18] total 52 [2020-12-23 00:07:33,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139509434] [2020-12-23 00:07:33,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 00:07:33,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:33,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 00:07:33,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=1870, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:07:33,388 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand 52 states. [2020-12-23 00:07:33,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:33,697 INFO L93 Difference]: Finished difference Result 185 states and 222 transitions. [2020-12-23 00:07:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 00:07:33,697 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 120 [2020-12-23 00:07:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:33,698 INFO L225 Difference]: With dead ends: 185 [2020-12-23 00:07:33,699 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 00:07:33,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=1870, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:07:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 00:07:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2020-12-23 00:07:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 00:07:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2020-12-23 00:07:33,705 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 120 [2020-12-23 00:07:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:33,705 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2020-12-23 00:07:33,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 00:07:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2020-12-23 00:07:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-23 00:07:33,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:33,706 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:33,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 00:07:33,907 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:33,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1399826030, now seen corresponding path program 34 times [2020-12-23 00:07:33,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:33,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880208682] [2020-12-23 00:07:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 00:07:34,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880208682] [2020-12-23 00:07:34,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507439902] [2020-12-23 00:07:34,795 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 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 00:07:34,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:34,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:34,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:07:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 00:07:35,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:35,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 00:07:35,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672744042] [2020-12-23 00:07:35,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 00:07:35,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:35,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 00:07:35,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:07:35,045 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand 38 states. [2020-12-23 00:07:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:35,169 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2020-12-23 00:07:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:07:35,170 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 125 [2020-12-23 00:07:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:35,171 INFO L225 Difference]: With dead ends: 188 [2020-12-23 00:07:35,171 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 00:07:35,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:07:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 00:07:35,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-12-23 00:07:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 00:07:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2020-12-23 00:07:35,176 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 125 [2020-12-23 00:07:35,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:35,176 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2020-12-23 00:07:35,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 00:07:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2020-12-23 00:07:35,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 00:07:35,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:35,177 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:35,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:07:35,391 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:35,391 INFO L82 PathProgramCache]: Analyzing trace with hash -704834608, now seen corresponding path program 35 times [2020-12-23 00:07:35,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:35,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321226814] [2020-12-23 00:07:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 00:07:36,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321226814] [2020-12-23 00:07:36,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731651460] [2020-12-23 00:07:36,250 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 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 00:07:37,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-23 00:07:37,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:37,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 00:07:37,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 00:07:37,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:37,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 00:07:37,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827286480] [2020-12-23 00:07:37,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 00:07:37,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:37,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 00:07:37,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:07:37,792 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand 39 states. [2020-12-23 00:07:37,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:37,925 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2020-12-23 00:07:37,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 00:07:37,925 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 127 [2020-12-23 00:07:37,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:37,926 INFO L225 Difference]: With dead ends: 190 [2020-12-23 00:07:37,926 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 00:07:37,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:07:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 00:07:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-12-23 00:07:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 00:07:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2020-12-23 00:07:37,931 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 127 [2020-12-23 00:07:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:37,932 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2020-12-23 00:07:37,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 00:07:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2020-12-23 00:07:37,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-23 00:07:37,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:37,933 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:38,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:07:38,147 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:38,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1461991054, now seen corresponding path program 36 times [2020-12-23 00:07:38,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:38,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914044426] [2020-12-23 00:07:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 00:07:39,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914044426] [2020-12-23 00:07:39,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442351753] [2020-12-23 00:07:39,043 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 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 00:07:45,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2020-12-23 00:07:45,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:45,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:07:45,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-12-23 00:07:46,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:46,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 19] total 56 [2020-12-23 00:07:46,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237757266] [2020-12-23 00:07:46,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 00:07:46,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:46,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 00:07:46,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=2169, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 00:07:46,102 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand 56 states. [2020-12-23 00:07:46,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:46,356 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2020-12-23 00:07:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 00:07:46,357 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 129 [2020-12-23 00:07:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:46,358 INFO L225 Difference]: With dead ends: 197 [2020-12-23 00:07:46,358 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 00:07:46,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=911, Invalid=2169, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 00:07:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 00:07:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-12-23 00:07:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 00:07:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2020-12-23 00:07:46,367 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 129 [2020-12-23 00:07:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:46,367 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2020-12-23 00:07:46,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 00:07:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2020-12-23 00:07:46,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-23 00:07:46,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:46,368 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:46,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:07:46,582 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:46,583 INFO L82 PathProgramCache]: Analyzing trace with hash 975069465, now seen corresponding path program 37 times [2020-12-23 00:07:46,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:46,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683965933] [2020-12-23 00:07:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-23 00:07:47,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683965933] [2020-12-23 00:07:47,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308343848] [2020-12-23 00:07:47,578 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 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 00:07:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:47,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:07:47,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-23 00:07:47,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:47,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 00:07:47,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946359799] [2020-12-23 00:07:47,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:07:47,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:47,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:07:47,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:07:47,835 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand 41 states. [2020-12-23 00:07:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:47,971 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-12-23 00:07:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:07:47,972 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 134 [2020-12-23 00:07:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:47,973 INFO L225 Difference]: With dead ends: 200 [2020-12-23 00:07:47,973 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 00:07:47,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 134 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 00:07:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 00:07:47,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-12-23 00:07:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 00:07:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 158 transitions. [2020-12-23 00:07:47,978 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 158 transitions. Word has length 134 [2020-12-23 00:07:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:47,979 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 158 transitions. [2020-12-23 00:07:47,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:07:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 158 transitions. [2020-12-23 00:07:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 00:07:47,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:47,980 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:48,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:07:48,194 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:48,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:48,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1881951387, now seen corresponding path program 38 times [2020-12-23 00:07:48,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:48,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805663246] [2020-12-23 00:07:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-23 00:07:49,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805663246] [2020-12-23 00:07:49,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16368998] [2020-12-23 00:07:49,191 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:49,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:49,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:49,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 00:07:49,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-23 00:07:49,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:49,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 00:07:49,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458287178] [2020-12-23 00:07:49,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 00:07:49,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:49,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 00:07:49,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:07:49,471 INFO L87 Difference]: Start difference. First operand 139 states and 158 transitions. Second operand 42 states. [2020-12-23 00:07:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:49,646 INFO L93 Difference]: Finished difference Result 202 states and 240 transitions. [2020-12-23 00:07:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 00:07:49,650 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 136 [2020-12-23 00:07:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:49,651 INFO L225 Difference]: With dead ends: 202 [2020-12-23 00:07:49,651 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 00:07:49,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:07:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 00:07:49,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-12-23 00:07:49,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 00:07:49,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2020-12-23 00:07:49,656 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 136 [2020-12-23 00:07:49,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:49,656 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2020-12-23 00:07:49,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 00:07:49,656 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2020-12-23 00:07:49,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 00:07:49,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:49,657 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:49,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:49,871 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:49,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:49,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1517117341, now seen corresponding path program 39 times [2020-12-23 00:07:49,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:49,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742523269] [2020-12-23 00:07:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-23 00:07:50,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742523269] [2020-12-23 00:07:50,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458113584] [2020-12-23 00:07:50,942 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:51,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 00:07:51,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:51,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:07:51,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-12-23 00:07:52,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:52,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 20] total 60 [2020-12-23 00:07:52,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919340250] [2020-12-23 00:07:52,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 00:07:52,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:52,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 00:07:52,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1050, Invalid=2490, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 00:07:52,063 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand 60 states. [2020-12-23 00:07:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:52,459 INFO L93 Difference]: Finished difference Result 209 states and 250 transitions. [2020-12-23 00:07:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 00:07:52,460 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 138 [2020-12-23 00:07:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:52,461 INFO L225 Difference]: With dead ends: 209 [2020-12-23 00:07:52,461 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 00:07:52,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1050, Invalid=2490, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 00:07:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 00:07:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-12-23 00:07:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-23 00:07:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2020-12-23 00:07:52,467 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 138 [2020-12-23 00:07:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:52,467 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2020-12-23 00:07:52,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 00:07:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2020-12-23 00:07:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-23 00:07:52,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:52,468 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:52,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:52,683 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:52,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:52,683 INFO L82 PathProgramCache]: Analyzing trace with hash -159054874, now seen corresponding path program 40 times [2020-12-23 00:07:52,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:52,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94907382] [2020-12-23 00:07:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-23 00:07:53,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94907382] [2020-12-23 00:07:53,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378110023] [2020-12-23 00:07:53,795 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:53,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:53,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:53,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:07:53,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-12-23 00:07:54,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:54,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 21] total 62 [2020-12-23 00:07:54,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575049366] [2020-12-23 00:07:54,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 00:07:54,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:54,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 00:07:54,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1112, Invalid=2670, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 00:07:54,867 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand 62 states. [2020-12-23 00:07:55,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:55,160 INFO L93 Difference]: Finished difference Result 217 states and 260 transitions. [2020-12-23 00:07:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 00:07:55,161 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 143 [2020-12-23 00:07:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:55,162 INFO L225 Difference]: With dead ends: 217 [2020-12-23 00:07:55,162 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 00:07:55,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1112, Invalid=2670, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 00:07:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 00:07:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2020-12-23 00:07:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 00:07:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2020-12-23 00:07:55,169 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 143 [2020-12-23 00:07:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:55,169 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2020-12-23 00:07:55,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 00:07:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2020-12-23 00:07:55,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 00:07:55,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:55,171 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:55,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 00:07:55,387 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:55,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:55,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1007793855, now seen corresponding path program 41 times [2020-12-23 00:07:55,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:55,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210705249] [2020-12-23 00:07:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:07:56,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210705249] [2020-12-23 00:07:56,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103740317] [2020-12-23 00:07:56,562 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:09:05,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 00:09:05,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:09:05,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 00:09:05,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:09:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:09:06,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:09:06,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 00:09:06,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935219096] [2020-12-23 00:09:06,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:09:06,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:09:06,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:09:06,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:09:06,118 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand 45 states. [2020-12-23 00:09:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:09:06,291 INFO L93 Difference]: Finished difference Result 220 states and 262 transitions. [2020-12-23 00:09:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 00:09:06,292 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 148 [2020-12-23 00:09:06,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:09:06,293 INFO L225 Difference]: With dead ends: 220 [2020-12-23 00:09:06,293 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 00:09:06,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:09:06,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 00:09:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-23 00:09:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 00:09:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2020-12-23 00:09:06,299 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 148 [2020-12-23 00:09:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:09:06,299 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2020-12-23 00:09:06,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:09:06,299 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2020-12-23 00:09:06,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-23 00:09:06,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:09:06,300 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:09:06,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:09:06,515 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:09:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:09:06,516 INFO L82 PathProgramCache]: Analyzing trace with hash -349116093, now seen corresponding path program 42 times [2020-12-23 00:09:06,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:09:06,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402690552] [2020-12-23 00:09:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:09:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:09:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:09:07,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402690552] [2020-12-23 00:09:07,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758524586] [2020-12-23 00:09:07,862 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:09:32,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2020-12-23 00:09:32,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:09:32,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:09:32,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:09:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-12-23 00:09:33,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:09:33,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 22] total 65 [2020-12-23 00:09:33,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847346765] [2020-12-23 00:09:33,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 00:09:33,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:09:33,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 00:09:33,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 00:09:33,139 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand 65 states. [2020-12-23 00:09:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:09:33,539 INFO L93 Difference]: Finished difference Result 227 states and 272 transitions. [2020-12-23 00:09:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 00:09:33,540 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 150 [2020-12-23 00:09:33,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:09:33,541 INFO L225 Difference]: With dead ends: 227 [2020-12-23 00:09:33,541 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 00:09:33,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 00:09:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 00:09:33,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2020-12-23 00:09:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-23 00:09:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2020-12-23 00:09:33,547 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 150 [2020-12-23 00:09:33,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:09:33,547 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2020-12-23 00:09:33,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 00:09:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2020-12-23 00:09:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-23 00:09:33,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:09:33,548 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:09:33,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:09:33,750 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:09:33,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:09:33,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1604131968, now seen corresponding path program 43 times [2020-12-23 00:09:33,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:09:33,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611905932] [2020-12-23 00:09:33,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:09:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:09:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 00:09:35,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611905932] [2020-12-23 00:09:35,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22456172] [2020-12-23 00:09:35,150 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:09:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:09:35,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 00:09:35,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:09:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 00:09:35,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:09:35,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 00:09:35,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647233374] [2020-12-23 00:09:35,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 00:09:35,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:09:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 00:09:35,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:09:35,466 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand 47 states. [2020-12-23 00:09:35,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:09:35,677 INFO L93 Difference]: Finished difference Result 230 states and 274 transitions. [2020-12-23 00:09:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 00:09:35,678 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 155 [2020-12-23 00:09:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:09:35,679 INFO L225 Difference]: With dead ends: 230 [2020-12-23 00:09:35,679 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 00:09:35,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:09:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 00:09:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-12-23 00:09:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 00:09:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2020-12-23 00:09:35,683 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 155 [2020-12-23 00:09:35,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:09:35,684 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2020-12-23 00:09:35,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 00:09:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2020-12-23 00:09:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-23 00:09:35,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:09:35,685 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:09:35,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 00:09:35,894 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:09:35,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:09:35,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1230070466, now seen corresponding path program 44 times [2020-12-23 00:09:35,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:09:35,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931990484] [2020-12-23 00:09:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:09:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:09:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 00:09:37,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931990484] [2020-12-23 00:09:37,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381433982] [2020-12-23 00:09:37,346 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:09:37,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:09:37,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:09:37,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 00:09:37,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:09:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 00:09:37,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:09:37,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 00:09:37,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629798408] [2020-12-23 00:09:37,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 00:09:37,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:09:37,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 00:09:37,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:09:37,655 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand 48 states. [2020-12-23 00:09:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:09:37,858 INFO L93 Difference]: Finished difference Result 232 states and 276 transitions. [2020-12-23 00:09:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 00:09:37,858 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 157 [2020-12-23 00:09:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:09:37,859 INFO L225 Difference]: With dead ends: 232 [2020-12-23 00:09:37,859 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 00:09:37,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:09:37,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 00:09:37,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-12-23 00:09:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 00:09:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2020-12-23 00:09:37,865 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 157 [2020-12-23 00:09:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:09:37,865 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2020-12-23 00:09:37,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 00:09:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2020-12-23 00:09:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-23 00:09:37,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:09:37,866 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:09:38,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 00:09:38,081 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:09:38,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:09:38,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1760747388, now seen corresponding path program 45 times [2020-12-23 00:09:38,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:09:38,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940924675] [2020-12-23 00:09:38,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:09:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:09:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 00:09:39,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940924675] [2020-12-23 00:09:39,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823334320] [2020-12-23 00:09:39,492 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:09:40,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-23 00:09:40,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:09:40,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 00:09:40,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:09:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2020-12-23 00:09:41,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:09:41,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 23] total 69 [2020-12-23 00:09:41,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75665665] [2020-12-23 00:09:41,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 00:09:41,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:09:41,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 00:09:41,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3312, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 00:09:41,452 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand 69 states. [2020-12-23 00:09:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:09:41,911 INFO L93 Difference]: Finished difference Result 239 states and 286 transitions. [2020-12-23 00:09:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 00:09:41,912 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 159 [2020-12-23 00:09:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:09:41,913 INFO L225 Difference]: With dead ends: 239 [2020-12-23 00:09:41,913 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 00:09:41,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1380, Invalid=3312, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 00:09:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 00:09:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-12-23 00:09:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 00:09:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 190 transitions. [2020-12-23 00:09:41,919 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 190 transitions. Word has length 159 [2020-12-23 00:09:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:09:41,920 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 190 transitions. [2020-12-23 00:09:41,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 00:09:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 190 transitions. [2020-12-23 00:09:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-23 00:09:41,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:09:41,921 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:09:42,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 00:09:42,135 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:09:42,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:09:42,136 INFO L82 PathProgramCache]: Analyzing trace with hash 872774123, now seen corresponding path program 46 times [2020-12-23 00:09:42,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:09:42,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525675551] [2020-12-23 00:09:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:09:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:09:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-23 00:09:43,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525675551] [2020-12-23 00:09:43,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640341424] [2020-12-23 00:09:43,731 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:09:43,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:09:43,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:09:43,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:09:43,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:09:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2020-12-23 00:09:45,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:09:45,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 24] total 71 [2020-12-23 00:09:45,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824211936] [2020-12-23 00:09:45,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 00:09:45,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:09:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 00:09:45,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1451, Invalid=3519, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 00:09:45,144 INFO L87 Difference]: Start difference. First operand 167 states and 190 transitions. Second operand 71 states. [2020-12-23 00:09:45,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:09:45,577 INFO L93 Difference]: Finished difference Result 247 states and 296 transitions. [2020-12-23 00:09:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 00:09:45,578 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 164 [2020-12-23 00:09:45,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:09:45,579 INFO L225 Difference]: With dead ends: 247 [2020-12-23 00:09:45,579 INFO L226 Difference]: Without dead ends: 175 [2020-12-23 00:09:45,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1451, Invalid=3519, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 00:09:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-23 00:09:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-12-23 00:09:45,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 00:09:45,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2020-12-23 00:09:45,586 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 164 [2020-12-23 00:09:45,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:09:45,586 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2020-12-23 00:09:45,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 00:09:45,587 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2020-12-23 00:09:45,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-23 00:09:45,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:09:45,588 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:09:45,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:09:45,804 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:09:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:09:45,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1899844264, now seen corresponding path program 47 times [2020-12-23 00:09:45,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:09:45,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939772667] [2020-12-23 00:09:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:09:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:09:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2924 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-23 00:09:47,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939772667] [2020-12-23 00:09:47,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041907360] [2020-12-23 00:09:47,408 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:10:43,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-23 00:10:43,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:10:43,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:10:43,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:10:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2924 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2020-12-23 00:10:44,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:10:44,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 25] total 73 [2020-12-23 00:10:44,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710467798] [2020-12-23 00:10:44,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 00:10:44,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:10:44,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 00:10:44,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=3732, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 00:10:44,767 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand 73 states. [2020-12-23 00:10:45,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:10:45,182 INFO L93 Difference]: Finished difference Result 255 states and 306 transitions. [2020-12-23 00:10:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 00:10:45,183 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 169 [2020-12-23 00:10:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:10:45,184 INFO L225 Difference]: With dead ends: 255 [2020-12-23 00:10:45,184 INFO L226 Difference]: Without dead ends: 180 [2020-12-23 00:10:45,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1524, Invalid=3732, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 00:10:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-23 00:10:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-12-23 00:10:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 00:10:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 202 transitions. [2020-12-23 00:10:45,190 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 202 transitions. Word has length 169 [2020-12-23 00:10:45,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:10:45,191 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 202 transitions. [2020-12-23 00:10:45,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 00:10:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 202 transitions. [2020-12-23 00:10:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-23 00:10:45,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:10:45,192 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:10:45,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 00:10:45,393 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:10:45,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:10:45,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2102154255, now seen corresponding path program 48 times [2020-12-23 00:10:45,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:10:45,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498485057] [2020-12-23 00:10:45,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:10:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:10:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3086 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-23 00:10:47,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498485057] [2020-12-23 00:10:47,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661565622] [2020-12-23 00:10:47,090 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true