/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/reducercommutativity/sep60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:26:14,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:26:14,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:26:14,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:26:14,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:26:14,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:26:14,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:26:14,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:26:14,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:26:14,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:26:14,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:26:14,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:26:14,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:26:14,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:26:14,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:26:14,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:26:14,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:26:14,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:26:14,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:26:14,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:26:14,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:26:14,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:26:14,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:26:14,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:26:14,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:26:14,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:26:14,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:26:14,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:26:14,493 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 00:26:14,551 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:26:14,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:26:14,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:26:14,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:26:14,556 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:26:14,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:26:14,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:26:14,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:26:14,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:26:14,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:26:14,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:26:14,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:26:14,559 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:26:14,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:26:14,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:26:14,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:26:14,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:26:14,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:26:14,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:26:14,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:26:14,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:26:14,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:26:14,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:26:14,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:26:14,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:26:14,563 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:26:15,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:26:15,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:26:15,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:26:15,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:26:15,058 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:26:15,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep60-2.i [2020-12-23 00:26:15,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b50235d6f/93d7f418497b49c2a4e7d7c32ef2c85b/FLAGf2b8f2733 [2020-12-23 00:26:15,717 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:26:15,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep60-2.i [2020-12-23 00:26:15,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b50235d6f/93d7f418497b49c2a4e7d7c32ef2c85b/FLAGf2b8f2733 [2020-12-23 00:26:16,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b50235d6f/93d7f418497b49c2a4e7d7c32ef2c85b [2020-12-23 00:26:16,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:26:16,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:26:16,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:26:16,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:26:16,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:26:16,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:26:16" (1/1) ... [2020-12-23 00:26:16,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fca59a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:16, skipping insertion in model container [2020-12-23 00:26:16,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:26:16" (1/1) ... [2020-12-23 00:26:16,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:26:16,161 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[59]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:26:16,438 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/reducercommutativity/sep60-2.i[1293,1306] [2020-12-23 00:26:16,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:26:16,462 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[236],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:26:16,512 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep60-2.i[1293,1306] [2020-12-23 00:26:16,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:26:16,536 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:26:16,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:16 WrapperNode [2020-12-23 00:26:16,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:26:16,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:26:16,540 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:26:16,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:26:16,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:16" (1/1) ... [2020-12-23 00:26:16,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:16" (1/1) ... [2020-12-23 00:26:16,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:26:16,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:26:16,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:26:16,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:26:16,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:16" (1/1) ... [2020-12-23 00:26:16,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:16" (1/1) ... [2020-12-23 00:26:16,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:16" (1/1) ... [2020-12-23 00:26:16,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:16" (1/1) ... [2020-12-23 00:26:16,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:16" (1/1) ... [2020-12-23 00:26:16,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:16" (1/1) ... [2020-12-23 00:26:16,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:16" (1/1) ... [2020-12-23 00:26:16,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:26:16,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:26:16,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:26:16,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:26:16,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:16" (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 00:26:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:26:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:26:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:26:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:26:16,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:26:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:26:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:26:17,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:26:17,319 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 00:26:17,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:26:17 BoogieIcfgContainer [2020-12-23 00:26:17,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:26:17,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:26:17,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:26:17,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:26:17,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:26:16" (1/3) ... [2020-12-23 00:26:17,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55dd020b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:26:17, skipping insertion in model container [2020-12-23 00:26:17,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:16" (2/3) ... [2020-12-23 00:26:17,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55dd020b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:26:17, skipping insertion in model container [2020-12-23 00:26:17,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:26:17" (3/3) ... [2020-12-23 00:26:17,337 INFO L111 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2020-12-23 00:26:17,344 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:26:17,348 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:26:17,372 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:26:17,420 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:26:17,421 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:26:17,421 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:26:17,421 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:26:17,421 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:26:17,421 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:26:17,422 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:26:17,422 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:26:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-23 00:26:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:26:17,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:17,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:17,451 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:17,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:17,459 INFO L82 PathProgramCache]: Analyzing trace with hash -23080620, now seen corresponding path program 1 times [2020-12-23 00:26:17,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:17,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521469818] [2020-12-23 00:26:17,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:17,713 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 00:26:17,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521469818] [2020-12-23 00:26:17,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:26:17,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:26:17,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330783584] [2020-12-23 00:26:17,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:26:17,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:17,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:26:17,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:26:17,742 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-23 00:26:17,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:17,765 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2020-12-23 00:26:17,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:26:17,767 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-23 00:26:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:17,777 INFO L225 Difference]: With dead ends: 56 [2020-12-23 00:26:17,778 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 00:26:17,782 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 00:26:17,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 00:26:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 00:26:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:26:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-12-23 00:26:17,826 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2020-12-23 00:26:17,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:17,827 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-12-23 00:26:17,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:26:17,828 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-12-23 00:26:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:26:17,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:17,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:17,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:26:17,832 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:17,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:17,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1060874985, now seen corresponding path program 1 times [2020-12-23 00:26:17,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:17,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170467246] [2020-12-23 00:26:17,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:17,899 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 00:26:17,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170467246] [2020-12-23 00:26:17,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:26:17,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:26:17,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939604111] [2020-12-23 00:26:17,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:26:17,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:17,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:26:17,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:26:17,903 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 3 states. [2020-12-23 00:26:17,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:17,925 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-12-23 00:26:17,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:26:17,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:26:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:17,928 INFO L225 Difference]: With dead ends: 50 [2020-12-23 00:26:17,928 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 00:26:17,929 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 00:26:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 00:26:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-23 00:26:17,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:26:17,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-12-23 00:26:17,938 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2020-12-23 00:26:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:17,940 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-12-23 00:26:17,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:26:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-12-23 00:26:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:26:17,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:17,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:17,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:26:17,943 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:17,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:17,945 INFO L82 PathProgramCache]: Analyzing trace with hash -507200985, now seen corresponding path program 1 times [2020-12-23 00:26:17,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:17,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998061217] [2020-12-23 00:26:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:18,035 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 00:26:18,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998061217] [2020-12-23 00:26:18,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846894275] [2020-12-23 00:26:18,036 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 00:26:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:18,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:26:18,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:18,173 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 00:26:18,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:18,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:26:18,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966076239] [2020-12-23 00:26:18,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:26:18,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:18,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:26:18,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:26:18,182 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 3 states. [2020-12-23 00:26:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:18,216 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-12-23 00:26:18,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:26:18,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:26:18,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:18,218 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:26:18,218 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 00:26:18,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 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 00:26:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 00:26:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-12-23 00:26:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:26:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-23 00:26:18,225 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2020-12-23 00:26:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:18,226 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-23 00:26:18,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:26:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-23 00:26:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:26:18,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:18,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:18,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:26:18,441 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:18,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1833868074, now seen corresponding path program 1 times [2020-12-23 00:26:18,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:18,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722468898] [2020-12-23 00:26:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:26:18,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722468898] [2020-12-23 00:26:18,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364886236] [2020-12-23 00:26:18,530 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 00:26:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:18,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:26:18,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:26:18,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:18,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:26:18,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800907864] [2020-12-23 00:26:18,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:26:18,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:18,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:26:18,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:26:18,654 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2020-12-23 00:26:18,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:18,669 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-12-23 00:26:18,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:26:18,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-23 00:26:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:18,671 INFO L225 Difference]: With dead ends: 42 [2020-12-23 00:26:18,671 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 00:26:18,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 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 00:26:18,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 00:26:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-23 00:26:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:26:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-23 00:26:18,678 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 28 [2020-12-23 00:26:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:18,679 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-23 00:26:18,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:26:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-23 00:26:18,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:26:18,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:18,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:18,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:18,896 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:18,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:18,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1777663060, now seen corresponding path program 1 times [2020-12-23 00:26:18,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:18,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870656555] [2020-12-23 00:26:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:18,943 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 00:26:18,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870656555] [2020-12-23 00:26:18,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131613964] [2020-12-23 00:26:18,944 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 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 00:26:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:19,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:26:19,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:19,129 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 00:26:19,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:19,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:26:19,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79507893] [2020-12-23 00:26:19,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:26:19,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:19,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:26:19,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:26:19,133 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2020-12-23 00:26:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:19,170 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-12-23 00:26:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:26:19,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-23 00:26:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:19,174 INFO L225 Difference]: With dead ends: 60 [2020-12-23 00:26:19,174 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 00:26:19,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 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 00:26:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 00:26:19,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-23 00:26:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:26:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-12-23 00:26:19,194 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 30 [2020-12-23 00:26:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:19,195 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-12-23 00:26:19,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:26:19,195 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-12-23 00:26:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:26:19,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:19,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:19,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:19,399 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash -861329106, now seen corresponding path program 2 times [2020-12-23 00:26:19,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:19,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218247326] [2020-12-23 00:26:19,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:26:19,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218247326] [2020-12-23 00:26:19,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941977912] [2020-12-23 00:26:19,514 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 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 00:26:19,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:19,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:19,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:26:19,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:26:19,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:19,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 00:26:19,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291632731] [2020-12-23 00:26:19,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:26:19,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:19,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:26:19,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:26:19,655 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 7 states. [2020-12-23 00:26:19,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:19,718 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2020-12-23 00:26:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:26:19,719 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-12-23 00:26:19,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:19,720 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:26:19,720 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 00:26:19,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 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 00:26:19,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 00:26:19,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-12-23 00:26:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 00:26:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2020-12-23 00:26:19,732 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2020-12-23 00:26:19,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:19,733 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2020-12-23 00:26:19,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:26:19,733 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2020-12-23 00:26:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 00:26:19,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:19,734 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:19,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:19,949 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:19,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1600422655, now seen corresponding path program 3 times [2020-12-23 00:26:19,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:19,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035958250] [2020-12-23 00:26:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:26:20,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035958250] [2020-12-23 00:26:20,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424697839] [2020-12-23 00:26:20,103 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 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 00:26:20,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:26:20,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:20,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:26:20,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:26:20,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:20,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:26:20,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530091907] [2020-12-23 00:26:20,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:26:20,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:20,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:26:20,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:26:20,217 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 5 states. [2020-12-23 00:26:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:20,233 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2020-12-23 00:26:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:26:20,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-23 00:26:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:20,234 INFO L225 Difference]: With dead ends: 60 [2020-12-23 00:26:20,234 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 00:26:20,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 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 00:26:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 00:26:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-12-23 00:26:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:26:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-12-23 00:26:20,240 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 43 [2020-12-23 00:26:20,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:20,241 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-12-23 00:26:20,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:26:20,241 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-12-23 00:26:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:26:20,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:20,242 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:20,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:26:20,459 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:20,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:20,460 INFO L82 PathProgramCache]: Analyzing trace with hash 477657599, now seen corresponding path program 4 times [2020-12-23 00:26:20,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:20,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576510057] [2020-12-23 00:26:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-23 00:26:20,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576510057] [2020-12-23 00:26:20,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025771791] [2020-12-23 00:26:20,591 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 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 00:26:20,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:20,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:20,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:26:20,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-23 00:26:20,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:20,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:26:20,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027285981] [2020-12-23 00:26:20,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:26:20,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:20,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:26:20,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:26:20,753 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 7 states. [2020-12-23 00:26:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:20,777 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2020-12-23 00:26:20,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:26:20,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-12-23 00:26:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:20,779 INFO L225 Difference]: With dead ends: 86 [2020-12-23 00:26:20,779 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:26:20,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:26:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:26:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 00:26:20,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:26:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-12-23 00:26:20,785 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 45 [2020-12-23 00:26:20,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:20,786 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-12-23 00:26:20,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:26:20,786 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-12-23 00:26:20,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:26:20,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:20,787 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:21,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:21,001 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:21,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1220648899, now seen corresponding path program 5 times [2020-12-23 00:26:21,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:21,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612431711] [2020-12-23 00:26:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-23 00:26:21,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612431711] [2020-12-23 00:26:21,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026985648] [2020-12-23 00:26:21,091 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 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 00:26:21,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:26:21,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:21,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:26:21,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:26:21,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:21,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-23 00:26:21,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504958814] [2020-12-23 00:26:21,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:26:21,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:21,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:26:21,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:26:21,270 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 10 states. [2020-12-23 00:26:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:21,317 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-12-23 00:26:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:26:21,318 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-12-23 00:26:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:21,318 INFO L225 Difference]: With dead ends: 91 [2020-12-23 00:26:21,319 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 00:26:21,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:26:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 00:26:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-12-23 00:26:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:26:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-12-23 00:26:21,325 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 47 [2020-12-23 00:26:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:21,326 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-12-23 00:26:21,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:26:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-12-23 00:26:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:26:21,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:21,327 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:21,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:21,543 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:21,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1924928889, now seen corresponding path program 6 times [2020-12-23 00:26:21,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:21,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246239422] [2020-12-23 00:26:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:26:21,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246239422] [2020-12-23 00:26:21,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244408074] [2020-12-23 00:26:21,625 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 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 00:26:21,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:26:21,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:21,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:26:21,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-23 00:26:21,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:21,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-23 00:26:21,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123759274] [2020-12-23 00:26:21,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:26:21,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:21,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:26:21,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:26:21,838 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 11 states. [2020-12-23 00:26:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:21,911 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2020-12-23 00:26:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:26:21,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-12-23 00:26:21,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:21,912 INFO L225 Difference]: With dead ends: 109 [2020-12-23 00:26:21,912 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 00:26:21,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:26:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 00:26:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-12-23 00:26:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 00:26:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-12-23 00:26:21,919 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 51 [2020-12-23 00:26:21,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:21,920 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-12-23 00:26:21,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:26:21,920 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-12-23 00:26:21,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 00:26:21,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:21,921 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:22,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:26:22,135 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:22,136 INFO L82 PathProgramCache]: Analyzing trace with hash -715721766, now seen corresponding path program 7 times [2020-12-23 00:26:22,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:22,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718371870] [2020-12-23 00:26:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 00:26:22,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718371870] [2020-12-23 00:26:22,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656366304] [2020-12-23 00:26:22,229 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 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 00:26:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:22,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:26:22,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 00:26:22,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:22,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:26:22,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960980947] [2020-12-23 00:26:22,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:26:22,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:22,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:26:22,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:26:22,409 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 10 states. [2020-12-23 00:26:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:22,447 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2020-12-23 00:26:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:26:22,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-12-23 00:26:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:22,449 INFO L225 Difference]: With dead ends: 114 [2020-12-23 00:26:22,449 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 00:26:22,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:26:22,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 00:26:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-23 00:26:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 00:26:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-12-23 00:26:22,459 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 62 [2020-12-23 00:26:22,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:22,462 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-12-23 00:26:22,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:26:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-12-23 00:26:22,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 00:26:22,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:22,464 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:22,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:22,678 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:22,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:22,679 INFO L82 PathProgramCache]: Analyzing trace with hash 699306332, now seen corresponding path program 8 times [2020-12-23 00:26:22,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:22,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003423620] [2020-12-23 00:26:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 00:26:22,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003423620] [2020-12-23 00:26:22,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669895193] [2020-12-23 00:26:22,804 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 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 00:26:22,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:22,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:22,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:26:22,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 00:26:22,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:22,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:26:22,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636276188] [2020-12-23 00:26:22,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:26:22,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:22,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:26:22,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:26:22,963 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 11 states. [2020-12-23 00:26:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:23,004 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2020-12-23 00:26:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:26:23,005 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-12-23 00:26:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:23,005 INFO L225 Difference]: With dead ends: 116 [2020-12-23 00:26:23,005 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 00:26:23,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 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 00:26:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 00:26:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-23 00:26:23,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 00:26:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-12-23 00:26:23,012 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 64 [2020-12-23 00:26:23,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:23,012 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-12-23 00:26:23,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:26:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-12-23 00:26:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 00:26:23,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:23,014 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:23,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:23,227 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:23,228 INFO L82 PathProgramCache]: Analyzing trace with hash -963324322, now seen corresponding path program 9 times [2020-12-23 00:26:23,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:23,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409799736] [2020-12-23 00:26:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 00:26:23,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409799736] [2020-12-23 00:26:23,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824714661] [2020-12-23 00:26:23,336 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 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 00:26:23,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:26:23,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:23,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:26:23,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-12-23 00:26:23,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:23,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-12-23 00:26:23,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85097343] [2020-12-23 00:26:23,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:26:23,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:23,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:26:23,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:26:23,556 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 15 states. [2020-12-23 00:26:23,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:23,671 INFO L93 Difference]: Finished difference Result 133 states and 168 transitions. [2020-12-23 00:26:23,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:26:23,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-12-23 00:26:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:23,673 INFO L225 Difference]: With dead ends: 133 [2020-12-23 00:26:23,673 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 00:26:23,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:26:23,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 00:26:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2020-12-23 00:26:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 00:26:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-12-23 00:26:23,696 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 66 [2020-12-23 00:26:23,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:23,696 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-12-23 00:26:23,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:26:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-12-23 00:26:23,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:26:23,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:23,698 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:23,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:26:23,907 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:23,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1058409135, now seen corresponding path program 10 times [2020-12-23 00:26:23,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:23,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353034696] [2020-12-23 00:26:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-23 00:26:24,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353034696] [2020-12-23 00:26:24,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126598515] [2020-12-23 00:26:24,057 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 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 00:26:24,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:24,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:26:24,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-23 00:26:24,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:24,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:26:24,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239433274] [2020-12-23 00:26:24,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:26:24,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:24,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:26:24,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:26:24,230 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 13 states. [2020-12-23 00:26:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:24,271 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2020-12-23 00:26:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:26:24,271 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-12-23 00:26:24,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:24,272 INFO L225 Difference]: With dead ends: 138 [2020-12-23 00:26:24,272 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 00:26:24,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:26:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 00:26:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-23 00:26:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 00:26:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-12-23 00:26:24,279 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 77 [2020-12-23 00:26:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:24,279 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-12-23 00:26:24,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:26:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-12-23 00:26:24,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 00:26:24,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:24,281 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:24,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:26:24,496 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:24,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1423401871, now seen corresponding path program 11 times [2020-12-23 00:26:24,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:24,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326264414] [2020-12-23 00:26:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-23 00:26:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326264414] [2020-12-23 00:26:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108084701] [2020-12-23 00:26:24,633 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 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 00:26:25,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:26:25,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:25,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:26:25,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-23 00:26:25,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:25,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2020-12-23 00:26:25,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426364358] [2020-12-23 00:26:25,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:26:25,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:25,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:26:25,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:26:25,162 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 18 states. [2020-12-23 00:26:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:25,315 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2020-12-23 00:26:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:26:25,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-12-23 00:26:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:25,316 INFO L225 Difference]: With dead ends: 155 [2020-12-23 00:26:25,316 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 00:26:25,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:26:25,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 00:26:25,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-12-23 00:26:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 00:26:25,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-12-23 00:26:25,336 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 79 [2020-12-23 00:26:25,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:25,337 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-12-23 00:26:25,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:26:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-12-23 00:26:25,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 00:26:25,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:25,339 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:25,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:26:25,554 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:25,555 INFO L82 PathProgramCache]: Analyzing trace with hash 647910148, now seen corresponding path program 12 times [2020-12-23 00:26:25,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:25,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165592101] [2020-12-23 00:26:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-23 00:26:25,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165592101] [2020-12-23 00:26:25,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804246059] [2020-12-23 00:26:25,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:26:26,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:26:26,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:26,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:26:26,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 00:26:26,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:26,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2020-12-23 00:26:26,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598057533] [2020-12-23 00:26:26,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:26:26,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:26,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:26:26,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:26:26,116 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 18 states. [2020-12-23 00:26:26,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:26,197 INFO L93 Difference]: Finished difference Result 163 states and 202 transitions. [2020-12-23 00:26:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:26:26,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 90 [2020-12-23 00:26:26,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:26,199 INFO L225 Difference]: With dead ends: 163 [2020-12-23 00:26:26,199 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 00:26:26,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:26:26,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 00:26:26,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-12-23 00:26:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 00:26:26,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2020-12-23 00:26:26,204 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 90 [2020-12-23 00:26:26,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:26,222 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2020-12-23 00:26:26,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:26:26,223 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2020-12-23 00:26:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 00:26:26,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:26,224 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:26,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:26,440 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:26,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1749882872, now seen corresponding path program 13 times [2020-12-23 00:26:26,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:26,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789105459] [2020-12-23 00:26:26,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 00:26:26,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789105459] [2020-12-23 00:26:26,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223414388] [2020-12-23 00:26:26,609 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 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 00:26:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:26,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:26:26,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 00:26:26,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:26,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:26:26,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802724658] [2020-12-23 00:26:26,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:26:26,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:26,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:26:26,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:26:26,795 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 16 states. [2020-12-23 00:26:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:26,836 INFO L93 Difference]: Finished difference Result 166 states and 204 transitions. [2020-12-23 00:26:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:26:26,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 94 [2020-12-23 00:26:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:26,837 INFO L225 Difference]: With dead ends: 166 [2020-12-23 00:26:26,837 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 00:26:26,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:26:26,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 00:26:26,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-23 00:26:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 00:26:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2020-12-23 00:26:26,843 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 94 [2020-12-23 00:26:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:26,843 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2020-12-23 00:26:26,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:26:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2020-12-23 00:26:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 00:26:26,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:26,845 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:27,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:26:27,059 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:27,060 INFO L82 PathProgramCache]: Analyzing trace with hash 98827658, now seen corresponding path program 14 times [2020-12-23 00:26:27,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:27,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664827900] [2020-12-23 00:26:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 00:26:27,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664827900] [2020-12-23 00:26:27,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095506094] [2020-12-23 00:26:27,273 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 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 00:26:27,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:27,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:27,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:26:27,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 00:26:27,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:27,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:26:27,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218706067] [2020-12-23 00:26:27,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:26:27,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:27,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:26:27,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:26:27,455 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand 17 states. [2020-12-23 00:26:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:27,501 INFO L93 Difference]: Finished difference Result 168 states and 206 transitions. [2020-12-23 00:26:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:26:27,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-12-23 00:26:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:27,503 INFO L225 Difference]: With dead ends: 168 [2020-12-23 00:26:27,503 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 00:26:27,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 96 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 00:26:27,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 00:26:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-12-23 00:26:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 00:26:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2020-12-23 00:26:27,509 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 96 [2020-12-23 00:26:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:27,510 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2020-12-23 00:26:27,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:26:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2020-12-23 00:26:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 00:26:27,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:27,511 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:27,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:26:27,725 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:27,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1406813556, now seen corresponding path program 15 times [2020-12-23 00:26:27,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:27,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000021164] [2020-12-23 00:26:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 00:26:27,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000021164] [2020-12-23 00:26:27,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224670984] [2020-12-23 00:26:27,917 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 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 00:26:28,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:26:28,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:28,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:26:28,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-23 00:26:28,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:28,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2020-12-23 00:26:28,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479508722] [2020-12-23 00:26:28,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:26:28,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:28,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:26:28,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:26:28,253 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 22 states. [2020-12-23 00:26:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:28,319 INFO L93 Difference]: Finished difference Result 173 states and 212 transitions. [2020-12-23 00:26:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:26:28,320 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-23 00:26:28,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:28,321 INFO L225 Difference]: With dead ends: 173 [2020-12-23 00:26:28,321 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 00:26:28,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:26:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 00:26:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2020-12-23 00:26:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 00:26:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2020-12-23 00:26:28,327 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 98 [2020-12-23 00:26:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:28,327 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2020-12-23 00:26:28,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:26:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2020-12-23 00:26:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 00:26:28,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:28,328 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:28,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:28,543 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:28,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:28,544 INFO L82 PathProgramCache]: Analyzing trace with hash 454650768, now seen corresponding path program 16 times [2020-12-23 00:26:28,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:28,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991753671] [2020-12-23 00:26:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-23 00:26:28,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991753671] [2020-12-23 00:26:28,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941707831] [2020-12-23 00:26:28,734 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 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 00:26:28,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:28,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:28,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:26:28,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-23 00:26:29,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:29,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:26:29,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207022707] [2020-12-23 00:26:29,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:26:29,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:29,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:26:29,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:26:29,012 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand 19 states. [2020-12-23 00:26:29,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:29,093 INFO L93 Difference]: Finished difference Result 176 states and 214 transitions. [2020-12-23 00:26:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:26:29,094 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 102 [2020-12-23 00:26:29,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:29,095 INFO L225 Difference]: With dead ends: 176 [2020-12-23 00:26:29,095 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 00:26:29,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:26:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 00:26:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-12-23 00:26:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 00:26:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2020-12-23 00:26:29,102 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 102 [2020-12-23 00:26:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:29,102 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2020-12-23 00:26:29,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:26:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2020-12-23 00:26:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 00:26:29,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:29,105 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:29,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:29,319 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:29,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1339695342, now seen corresponding path program 17 times [2020-12-23 00:26:29,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:29,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755364433] [2020-12-23 00:26:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-23 00:26:29,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755364433] [2020-12-23 00:26:29,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322715518] [2020-12-23 00:26:29,540 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 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 00:26:30,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 00:26:30,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:30,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:26:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-23 00:26:30,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:30,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:26:30,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670911753] [2020-12-23 00:26:30,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:26:30,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:30,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:26:30,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:26:30,498 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand 20 states. [2020-12-23 00:26:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:30,554 INFO L93 Difference]: Finished difference Result 178 states and 216 transitions. [2020-12-23 00:26:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:26:30,555 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 104 [2020-12-23 00:26:30,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:30,556 INFO L225 Difference]: With dead ends: 178 [2020-12-23 00:26:30,556 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 00:26:30,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 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 00:26:30,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 00:26:30,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-12-23 00:26:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 00:26:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-12-23 00:26:30,561 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 104 [2020-12-23 00:26:30,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:30,561 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-12-23 00:26:30,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:26:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-12-23 00:26:30,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 00:26:30,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:30,562 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:30,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:30,777 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:30,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:30,778 INFO L82 PathProgramCache]: Analyzing trace with hash 870545940, now seen corresponding path program 18 times [2020-12-23 00:26:30,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:30,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123953548] [2020-12-23 00:26:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-23 00:26:31,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123953548] [2020-12-23 00:26:31,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798040849] [2020-12-23 00:26:31,036 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 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 00:26:31,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 00:26:31,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:31,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:26:31,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-12-23 00:26:31,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:31,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-12-23 00:26:31,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096340488] [2020-12-23 00:26:31,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:26:31,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:31,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:26:31,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:26:31,916 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 26 states. [2020-12-23 00:26:32,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:32,061 INFO L93 Difference]: Finished difference Result 195 states and 242 transitions. [2020-12-23 00:26:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:26:32,061 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 106 [2020-12-23 00:26:32,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:32,062 INFO L225 Difference]: With dead ends: 195 [2020-12-23 00:26:32,062 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 00:26:32,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:26:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 00:26:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2020-12-23 00:26:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 00:26:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 140 transitions. [2020-12-23 00:26:32,068 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 140 transitions. Word has length 106 [2020-12-23 00:26:32,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:32,068 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 140 transitions. [2020-12-23 00:26:32,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:26:32,068 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 140 transitions. [2020-12-23 00:26:32,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 00:26:32,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:32,070 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:32,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:26:32,285 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:32,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1113774245, now seen corresponding path program 19 times [2020-12-23 00:26:32,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:32,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226987471] [2020-12-23 00:26:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-23 00:26:32,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226987471] [2020-12-23 00:26:32,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734934172] [2020-12-23 00:26:32,555 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 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 00:26:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:32,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:26:32,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-23 00:26:32,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:32,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 00:26:32,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590668631] [2020-12-23 00:26:32,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:26:32,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:32,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:26:32,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:26:32,766 INFO L87 Difference]: Start difference. First operand 118 states and 140 transitions. Second operand 22 states. [2020-12-23 00:26:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:32,828 INFO L93 Difference]: Finished difference Result 200 states and 244 transitions. [2020-12-23 00:26:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:26:32,828 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 117 [2020-12-23 00:26:32,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:32,829 INFO L225 Difference]: With dead ends: 200 [2020-12-23 00:26:32,830 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 00:26:32,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:26:32,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 00:26:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-12-23 00:26:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:26:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2020-12-23 00:26:32,835 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 117 [2020-12-23 00:26:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:32,835 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2020-12-23 00:26:32,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:26:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2020-12-23 00:26:32,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 00:26:32,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:32,837 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:33,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:26:33,053 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:33,054 INFO L82 PathProgramCache]: Analyzing trace with hash 30343065, now seen corresponding path program 20 times [2020-12-23 00:26:33,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:33,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654547723] [2020-12-23 00:26:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-23 00:26:33,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654547723] [2020-12-23 00:26:33,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363670139] [2020-12-23 00:26:33,341 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 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 00:26:33,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:33,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:33,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:26:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-23 00:26:33,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:33,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:26:33,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922576064] [2020-12-23 00:26:33,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:26:33,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:33,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:26:33,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:26:33,551 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand 23 states. [2020-12-23 00:26:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:33,611 INFO L93 Difference]: Finished difference Result 202 states and 246 transitions. [2020-12-23 00:26:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:26:33,612 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2020-12-23 00:26:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:33,615 INFO L225 Difference]: With dead ends: 202 [2020-12-23 00:26:33,615 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 00:26:33,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:26:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 00:26:33,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-12-23 00:26:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-23 00:26:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2020-12-23 00:26:33,624 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 119 [2020-12-23 00:26:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:33,624 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2020-12-23 00:26:33,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:26:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2020-12-23 00:26:33,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-23 00:26:33,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:33,626 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:33,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:33,840 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:33,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash 15450199, now seen corresponding path program 21 times [2020-12-23 00:26:33,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:33,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869093098] [2020-12-23 00:26:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-23 00:26:34,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869093098] [2020-12-23 00:26:34,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517021074] [2020-12-23 00:26:34,165 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 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 00:26:34,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:26:34,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:34,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:26:34,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-12-23 00:26:34,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:34,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2020-12-23 00:26:34,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782470675] [2020-12-23 00:26:34,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:26:34,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:34,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:26:34,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:26:34,605 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 29 states. [2020-12-23 00:26:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:34,706 INFO L93 Difference]: Finished difference Result 207 states and 252 transitions. [2020-12-23 00:26:34,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:26:34,707 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 121 [2020-12-23 00:26:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:34,708 INFO L225 Difference]: With dead ends: 207 [2020-12-23 00:26:34,708 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 00:26:34,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:26:34,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 00:26:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-12-23 00:26:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-23 00:26:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2020-12-23 00:26:34,714 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 121 [2020-12-23 00:26:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:34,715 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2020-12-23 00:26:34,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:26:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2020-12-23 00:26:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-23 00:26:34,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:34,716 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:34,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:26:34,930 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:34,931 INFO L82 PathProgramCache]: Analyzing trace with hash 887235731, now seen corresponding path program 22 times [2020-12-23 00:26:34,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:34,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374040321] [2020-12-23 00:26:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-23 00:26:35,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374040321] [2020-12-23 00:26:35,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169384786] [2020-12-23 00:26:35,242 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 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 00:26:35,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:35,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:35,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:26:35,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-23 00:26:35,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:35,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 00:26:35,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000058085] [2020-12-23 00:26:35,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 00:26:35,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:35,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 00:26:35,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:26:35,473 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand 25 states. [2020-12-23 00:26:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:35,540 INFO L93 Difference]: Finished difference Result 210 states and 254 transitions. [2020-12-23 00:26:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:26:35,540 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 125 [2020-12-23 00:26:35,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:35,541 INFO L225 Difference]: With dead ends: 210 [2020-12-23 00:26:35,541 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 00:26:35,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:26:35,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 00:26:35,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-12-23 00:26:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 00:26:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2020-12-23 00:26:35,547 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 125 [2020-12-23 00:26:35,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:35,547 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2020-12-23 00:26:35,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 00:26:35,547 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2020-12-23 00:26:35,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 00:26:35,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:35,548 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:35,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:35,761 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:35,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:35,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1582227153, now seen corresponding path program 23 times [2020-12-23 00:26:35,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:35,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106168059] [2020-12-23 00:26:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-23 00:26:36,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106168059] [2020-12-23 00:26:36,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382287756] [2020-12-23 00:26:36,107 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 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 00:26:37,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-23 00:26:37,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:37,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:26:37,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-12-23 00:26:38,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:38,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2020-12-23 00:26:38,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147210913] [2020-12-23 00:26:38,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:26:38,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:38,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:26:38,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:26:38,120 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand 32 states. [2020-12-23 00:26:38,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:38,329 INFO L93 Difference]: Finished difference Result 227 states and 280 transitions. [2020-12-23 00:26:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:26:38,329 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 127 [2020-12-23 00:26:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:38,330 INFO L225 Difference]: With dead ends: 227 [2020-12-23 00:26:38,330 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 00:26:38,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:26:38,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 00:26:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2020-12-23 00:26:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 00:26:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2020-12-23 00:26:38,336 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 127 [2020-12-23 00:26:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:38,337 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2020-12-23 00:26:38,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:26:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2020-12-23 00:26:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 00:26:38,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:38,338 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:38,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:26:38,552 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:38,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:38,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1830905794, now seen corresponding path program 24 times [2020-12-23 00:26:38,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:38,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393728197] [2020-12-23 00:26:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-12-23 00:26:38,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393728197] [2020-12-23 00:26:38,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994145851] [2020-12-23 00:26:38,925 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 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 00:26:39,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:26:39,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:39,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:26:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2020-12-23 00:26:40,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:40,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2020-12-23 00:26:40,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974507982] [2020-12-23 00:26:40,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 00:26:40,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:40,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 00:26:40,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:26:40,054 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand 33 states. [2020-12-23 00:26:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:40,175 INFO L93 Difference]: Finished difference Result 235 states and 286 transitions. [2020-12-23 00:26:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:26:40,175 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 138 [2020-12-23 00:26:40,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:40,176 INFO L225 Difference]: With dead ends: 235 [2020-12-23 00:26:40,176 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 00:26:40,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:26:40,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 00:26:40,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2020-12-23 00:26:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-23 00:26:40,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2020-12-23 00:26:40,183 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 138 [2020-12-23 00:26:40,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:40,183 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2020-12-23 00:26:40,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 00:26:40,183 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2020-12-23 00:26:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-23 00:26:40,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:40,184 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:40,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:26:40,398 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:40,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1631469626, now seen corresponding path program 25 times [2020-12-23 00:26:40,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:40,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466261619] [2020-12-23 00:26:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-12-23 00:26:40,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466261619] [2020-12-23 00:26:40,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452164389] [2020-12-23 00:26:40,843 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 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 00:26:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:40,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:26:40,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-12-23 00:26:41,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:41,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 00:26:41,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879895374] [2020-12-23 00:26:41,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:26:41,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:41,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:26:41,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:26:41,105 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand 28 states. [2020-12-23 00:26:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:41,177 INFO L93 Difference]: Finished difference Result 238 states and 288 transitions. [2020-12-23 00:26:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:26:41,177 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 142 [2020-12-23 00:26:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:41,178 INFO L225 Difference]: With dead ends: 238 [2020-12-23 00:26:41,179 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 00:26:41,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 142 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 00:26:41,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 00:26:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-12-23 00:26:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 00:26:41,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2020-12-23 00:26:41,184 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 142 [2020-12-23 00:26:41,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:41,184 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2020-12-23 00:26:41,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:26:41,185 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2020-12-23 00:26:41,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-23 00:26:41,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:41,186 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:41,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:26:41,401 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:41,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:41,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1804269240, now seen corresponding path program 26 times [2020-12-23 00:26:41,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:41,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599836345] [2020-12-23 00:26:41,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-12-23 00:26:41,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599836345] [2020-12-23 00:26:41,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640159893] [2020-12-23 00:26:41,776 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 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 00:26:41,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:41,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:41,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:26:41,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-12-23 00:26:42,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:42,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 00:26:42,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064817349] [2020-12-23 00:26:42,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:26:42,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:42,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:26:42,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:26:42,038 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand 29 states. [2020-12-23 00:26:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:42,120 INFO L93 Difference]: Finished difference Result 240 states and 290 transitions. [2020-12-23 00:26:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:26:42,121 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 144 [2020-12-23 00:26:42,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:42,122 INFO L225 Difference]: With dead ends: 240 [2020-12-23 00:26:42,122 INFO L226 Difference]: Without dead ends: 148 [2020-12-23 00:26:42,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:26:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-23 00:26:42,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-12-23 00:26:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-23 00:26:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2020-12-23 00:26:42,127 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 144 [2020-12-23 00:26:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:42,128 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2020-12-23 00:26:42,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:26:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2020-12-23 00:26:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 00:26:42,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:42,129 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:42,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:42,343 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:42,343 INFO L82 PathProgramCache]: Analyzing trace with hash -360973750, now seen corresponding path program 27 times [2020-12-23 00:26:42,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:42,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95990990] [2020-12-23 00:26:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-12-23 00:26:42,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95990990] [2020-12-23 00:26:42,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908226416] [2020-12-23 00:26:42,780 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 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 00:26:43,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:26:43,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:43,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:26:43,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 865 trivial. 0 not checked. [2020-12-23 00:26:43,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:43,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2020-12-23 00:26:43,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161408056] [2020-12-23 00:26:43,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:26:43,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:43,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:26:43,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:26:43,515 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand 37 states. [2020-12-23 00:26:43,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:43,718 INFO L93 Difference]: Finished difference Result 257 states and 316 transitions. [2020-12-23 00:26:43,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:26:43,719 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 146 [2020-12-23 00:26:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:43,720 INFO L225 Difference]: With dead ends: 257 [2020-12-23 00:26:43,720 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 00:26:43,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:26:43,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 00:26:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 158. [2020-12-23 00:26:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-23 00:26:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2020-12-23 00:26:43,727 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 146 [2020-12-23 00:26:43,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:43,727 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2020-12-23 00:26:43,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:26:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2020-12-23 00:26:43,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-23 00:26:43,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:43,728 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:43,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 00:26:43,944 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:43,945 INFO L82 PathProgramCache]: Analyzing trace with hash -766472987, now seen corresponding path program 28 times [2020-12-23 00:26:43,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:43,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815706622] [2020-12-23 00:26:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-23 00:26:44,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815706622] [2020-12-23 00:26:44,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280691516] [2020-12-23 00:26:44,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:26:44,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:44,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:44,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:26:44,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2020-12-23 00:26:44,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:44,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2020-12-23 00:26:44,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206779734] [2020-12-23 00:26:44,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 00:26:44,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:44,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 00:26:44,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:26:44,825 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand 39 states. [2020-12-23 00:26:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:45,113 INFO L93 Difference]: Finished difference Result 277 states and 342 transitions. [2020-12-23 00:26:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:26:45,114 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 157 [2020-12-23 00:26:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:45,115 INFO L225 Difference]: With dead ends: 277 [2020-12-23 00:26:45,115 INFO L226 Difference]: Without dead ends: 176 [2020-12-23 00:26:45,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:26:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-23 00:26:45,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2020-12-23 00:26:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-23 00:26:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2020-12-23 00:26:45,122 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 157 [2020-12-23 00:26:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:45,122 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2020-12-23 00:26:45,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 00:26:45,122 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2020-12-23 00:26:45,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-23 00:26:45,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:45,123 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:45,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:45,338 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:45,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:45,339 INFO L82 PathProgramCache]: Analyzing trace with hash -36456210, now seen corresponding path program 29 times [2020-12-23 00:26:45,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:45,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438976799] [2020-12-23 00:26:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-12-23 00:26:45,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438976799] [2020-12-23 00:26:45,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108324528] [2020-12-23 00:26:45,842 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 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 00:27:02,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-23 00:27:02,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:27:02,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:27:02,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2020-12-23 00:27:03,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:03,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2020-12-23 00:27:03,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253482199] [2020-12-23 00:27:03,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:27:03,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:03,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:27:03,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:27:03,094 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand 41 states. [2020-12-23 00:27:03,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:03,375 INFO L93 Difference]: Finished difference Result 297 states and 368 transitions. [2020-12-23 00:27:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 00:27:03,375 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 168 [2020-12-23 00:27:03,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:03,376 INFO L225 Difference]: With dead ends: 297 [2020-12-23 00:27:03,377 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 00:27:03,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:27:03,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 00:27:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 180. [2020-12-23 00:27:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 00:27:03,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 214 transitions. [2020-12-23 00:27:03,383 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 214 transitions. Word has length 168 [2020-12-23 00:27:03,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:03,384 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 214 transitions. [2020-12-23 00:27:03,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:27:03,384 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 214 transitions. [2020-12-23 00:27:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-12-23 00:27:03,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:03,385 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:03,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:27:03,599 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:03,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1377034177, now seen corresponding path program 30 times [2020-12-23 00:27:03,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:03,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882534592] [2020-12-23 00:27:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-23 00:27:04,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882534592] [2020-12-23 00:27:04,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870519474] [2020-12-23 00:27:04,109 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 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 00:27:05,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 00:27:05,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:27:05,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:27:05,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-12-23 00:27:05,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:05,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 40 [2020-12-23 00:27:05,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411514827] [2020-12-23 00:27:05,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:27:05,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:05,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:27:05,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:27:05,859 INFO L87 Difference]: Start difference. First operand 180 states and 214 transitions. Second operand 40 states. [2020-12-23 00:27:05,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:05,989 INFO L93 Difference]: Finished difference Result 305 states and 374 transitions. [2020-12-23 00:27:05,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:27:05,990 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 179 [2020-12-23 00:27:05,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:05,991 INFO L225 Difference]: With dead ends: 305 [2020-12-23 00:27:05,991 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 00:27:05,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:27:05,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 00:27:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-12-23 00:27:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 00:27:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 218 transitions. [2020-12-23 00:27:05,998 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 218 transitions. Word has length 179 [2020-12-23 00:27:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:05,999 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 218 transitions. [2020-12-23 00:27:05,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:27:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 218 transitions. [2020-12-23 00:27:06,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-23 00:27:06,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:06,000 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:06,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 00:27:06,216 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:06,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1181418755, now seen corresponding path program 31 times [2020-12-23 00:27:06,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:06,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334542054] [2020-12-23 00:27:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2020-12-23 00:27:06,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334542054] [2020-12-23 00:27:06,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010486678] [2020-12-23 00:27:06,806 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 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 00:27:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:06,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 00:27:06,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2020-12-23 00:27:07,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:07,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 00:27:07,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210858170] [2020-12-23 00:27:07,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:27:07,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:07,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:27:07,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:27:07,086 INFO L87 Difference]: Start difference. First operand 184 states and 218 transitions. Second operand 34 states. [2020-12-23 00:27:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:07,210 INFO L93 Difference]: Finished difference Result 308 states and 376 transitions. [2020-12-23 00:27:07,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:27:07,217 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 183 [2020-12-23 00:27:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:07,220 INFO L225 Difference]: With dead ends: 308 [2020-12-23 00:27:07,221 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 00:27:07,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:27:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 00:27:07,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-12-23 00:27:07,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 00:27:07,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-12-23 00:27:07,227 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 183 [2020-12-23 00:27:07,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:07,227 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-12-23 00:27:07,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:27:07,228 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-12-23 00:27:07,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-23 00:27:07,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:07,229 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:07,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:27:07,439 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:07,440 INFO L82 PathProgramCache]: Analyzing trace with hash 650955707, now seen corresponding path program 32 times [2020-12-23 00:27:07,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:07,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28130919] [2020-12-23 00:27:07,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2020-12-23 00:27:08,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28130919] [2020-12-23 00:27:08,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023457810] [2020-12-23 00:27:08,093 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 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 00:27:08,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:27:08,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:27:08,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:27:08,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2020-12-23 00:27:08,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:08,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 00:27:08,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837522605] [2020-12-23 00:27:08,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:27:08,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:08,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:27:08,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:27:08,380 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 35 states. [2020-12-23 00:27:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:08,498 INFO L93 Difference]: Finished difference Result 310 states and 378 transitions. [2020-12-23 00:27:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:27:08,498 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 185 [2020-12-23 00:27:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:08,499 INFO L225 Difference]: With dead ends: 310 [2020-12-23 00:27:08,499 INFO L226 Difference]: Without dead ends: 189 [2020-12-23 00:27:08,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:27:08,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-23 00:27:08,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-12-23 00:27:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-23 00:27:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 222 transitions. [2020-12-23 00:27:08,505 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 222 transitions. Word has length 185 [2020-12-23 00:27:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:08,505 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 222 transitions. [2020-12-23 00:27:08,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:27:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 222 transitions. [2020-12-23 00:27:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-12-23 00:27:08,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:08,506 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:08,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 00:27:08,720 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:08,721 INFO L82 PathProgramCache]: Analyzing trace with hash 626222329, now seen corresponding path program 33 times [2020-12-23 00:27:08,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:08,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159186092] [2020-12-23 00:27:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2020-12-23 00:27:09,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159186092] [2020-12-23 00:27:09,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600206981] [2020-12-23 00:27:09,327 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 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 00:27:10,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 00:27:10,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:27:10,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:27:10,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2020-12-23 00:27:10,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:10,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 11] total 44 [2020-12-23 00:27:10,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683504642] [2020-12-23 00:27:10,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 00:27:10,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:10,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 00:27:10,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:27:10,462 INFO L87 Difference]: Start difference. First operand 188 states and 222 transitions. Second operand 44 states. [2020-12-23 00:27:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:10,660 INFO L93 Difference]: Finished difference Result 315 states and 384 transitions. [2020-12-23 00:27:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 00:27:10,661 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 187 [2020-12-23 00:27:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:10,662 INFO L225 Difference]: With dead ends: 315 [2020-12-23 00:27:10,662 INFO L226 Difference]: Without dead ends: 194 [2020-12-23 00:27:10,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:27:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-23 00:27:10,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2020-12-23 00:27:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-23 00:27:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 226 transitions. [2020-12-23 00:27:10,679 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 226 transitions. Word has length 187 [2020-12-23 00:27:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:10,679 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 226 transitions. [2020-12-23 00:27:10,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 00:27:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 226 transitions. [2020-12-23 00:27:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-23 00:27:10,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:10,681 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:10,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:27:10,896 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:10,897 INFO L82 PathProgramCache]: Analyzing trace with hash -667749323, now seen corresponding path program 34 times [2020-12-23 00:27:10,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:10,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306578592] [2020-12-23 00:27:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-12-23 00:27:11,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306578592] [2020-12-23 00:27:11,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225336109] [2020-12-23 00:27:11,572 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 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 00:27:11,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:27:11,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:27:11,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 00:27:11,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-12-23 00:27:11,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:11,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 00:27:11,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009234111] [2020-12-23 00:27:11,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:27:11,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:11,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:27:11,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:27:11,900 INFO L87 Difference]: Start difference. First operand 192 states and 226 transitions. Second operand 37 states. [2020-12-23 00:27:12,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:12,014 INFO L93 Difference]: Finished difference Result 318 states and 386 transitions. [2020-12-23 00:27:12,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:27:12,014 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 191 [2020-12-23 00:27:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:12,016 INFO L225 Difference]: With dead ends: 318 [2020-12-23 00:27:12,016 INFO L226 Difference]: Without dead ends: 195 [2020-12-23 00:27:12,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:27:12,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-23 00:27:12,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2020-12-23 00:27:12,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 00:27:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 228 transitions. [2020-12-23 00:27:12,023 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 228 transitions. Word has length 191 [2020-12-23 00:27:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:12,023 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 228 transitions. [2020-12-23 00:27:12,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:27:12,023 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 228 transitions. [2020-12-23 00:27:12,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-12-23 00:27:12,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:12,025 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:12,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:27:12,241 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:12,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1016781069, now seen corresponding path program 35 times [2020-12-23 00:27:12,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:12,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407750901] [2020-12-23 00:27:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-12-23 00:27:12,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407750901] [2020-12-23 00:27:12,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953806360] [2020-12-23 00:27:12,966 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 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 00:28:34,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-23 00:28:34,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:28:34,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:28:34,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:28:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-12-23 00:28:34,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:34,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 00:28:34,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215028510] [2020-12-23 00:28:34,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 00:28:34,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:34,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 00:28:34,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:28:34,353 INFO L87 Difference]: Start difference. First operand 194 states and 228 transitions. Second operand 38 states. [2020-12-23 00:28:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:34,466 INFO L93 Difference]: Finished difference Result 320 states and 388 transitions. [2020-12-23 00:28:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:28:34,467 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 193 [2020-12-23 00:28:34,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:34,467 INFO L225 Difference]: With dead ends: 320 [2020-12-23 00:28:34,468 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 00:28:34,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:28:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 00:28:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2020-12-23 00:28:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-23 00:28:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 230 transitions. [2020-12-23 00:28:34,474 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 230 transitions. Word has length 193 [2020-12-23 00:28:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:34,475 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 230 transitions. [2020-12-23 00:28:34,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 00:28:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 230 transitions. [2020-12-23 00:28:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-12-23 00:28:34,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:34,476 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:34,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:28:34,691 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:34,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:34,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1428839887, now seen corresponding path program 36 times [2020-12-23 00:28:34,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:34,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542358388] [2020-12-23 00:28:34,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-12-23 00:28:35,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542358388] [2020-12-23 00:28:35,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911587753] [2020-12-23 00:28:35,464 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 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 00:28:43,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 00:28:43,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:28:43,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:28:43,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:28:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2020-12-23 00:28:43,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:43,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 12] total 48 [2020-12-23 00:28:43,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749874849] [2020-12-23 00:28:43,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 00:28:43,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:43,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 00:28:43,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:28:43,968 INFO L87 Difference]: Start difference. First operand 196 states and 230 transitions. Second operand 48 states. [2020-12-23 00:28:44,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:44,143 INFO L93 Difference]: Finished difference Result 325 states and 394 transitions. [2020-12-23 00:28:44,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 00:28:44,144 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 195 [2020-12-23 00:28:44,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:44,145 INFO L225 Difference]: With dead ends: 325 [2020-12-23 00:28:44,145 INFO L226 Difference]: Without dead ends: 202 [2020-12-23 00:28:44,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:28:44,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-23 00:28:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-12-23 00:28:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-23 00:28:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 234 transitions. [2020-12-23 00:28:44,153 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 234 transitions. Word has length 195 [2020-12-23 00:28:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:44,153 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 234 transitions. [2020-12-23 00:28:44,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 00:28:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 234 transitions. [2020-12-23 00:28:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-12-23 00:28:44,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:44,155 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:44,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:28:44,370 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:44,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:44,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1018976915, now seen corresponding path program 37 times [2020-12-23 00:28:44,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:44,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916475247] [2020-12-23 00:28:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1831 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-23 00:28:45,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916475247] [2020-12-23 00:28:45,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851502490] [2020-12-23 00:28:45,233 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 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 00:28:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:45,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:28:45,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:28:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1831 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-23 00:28:45,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:45,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 00:28:45,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116402017] [2020-12-23 00:28:45,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:28:45,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:45,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:28:45,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:28:45,541 INFO L87 Difference]: Start difference. First operand 200 states and 234 transitions. Second operand 40 states. [2020-12-23 00:28:45,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:45,680 INFO L93 Difference]: Finished difference Result 328 states and 396 transitions. [2020-12-23 00:28:45,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:28:45,680 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 199 [2020-12-23 00:28:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:45,681 INFO L225 Difference]: With dead ends: 328 [2020-12-23 00:28:45,681 INFO L226 Difference]: Without dead ends: 203 [2020-12-23 00:28:45,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:28:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-23 00:28:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-12-23 00:28:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-23 00:28:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 236 transitions. [2020-12-23 00:28:45,689 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 236 transitions. Word has length 199 [2020-12-23 00:28:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:45,689 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 236 transitions. [2020-12-23 00:28:45,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:28:45,689 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 236 transitions. [2020-12-23 00:28:45,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-23 00:28:45,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:45,691 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:45,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:28:45,903 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:45,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:45,904 INFO L82 PathProgramCache]: Analyzing trace with hash -991020501, now seen corresponding path program 38 times [2020-12-23 00:28:45,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:45,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572435238] [2020-12-23 00:28:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1904 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-23 00:28:46,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572435238] [2020-12-23 00:28:46,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296009814] [2020-12-23 00:28:46,742 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 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 00:28:46,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:28:46,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:28:46,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:28:46,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:28:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1904 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-23 00:28:47,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:47,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 00:28:47,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007135941] [2020-12-23 00:28:47,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:28:47,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:47,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:28:47,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:28:47,096 INFO L87 Difference]: Start difference. First operand 202 states and 236 transitions. Second operand 41 states. [2020-12-23 00:28:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:47,222 INFO L93 Difference]: Finished difference Result 330 states and 398 transitions. [2020-12-23 00:28:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:28:47,222 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 201 [2020-12-23 00:28:47,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:47,223 INFO L225 Difference]: With dead ends: 330 [2020-12-23 00:28:47,223 INFO L226 Difference]: Without dead ends: 205 [2020-12-23 00:28:47,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:28:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-23 00:28:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2020-12-23 00:28:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-23 00:28:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 238 transitions. [2020-12-23 00:28:47,229 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 238 transitions. Word has length 201 [2020-12-23 00:28:47,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:47,230 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 238 transitions. [2020-12-23 00:28:47,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:28:47,230 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 238 transitions. [2020-12-23 00:28:47,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-12-23 00:28:47,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:47,231 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:47,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:28:47,444 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:47,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash 105289577, now seen corresponding path program 39 times [2020-12-23 00:28:47,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:47,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796742754] [2020-12-23 00:28:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1979 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-23 00:28:48,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796742754] [2020-12-23 00:28:48,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425521497] [2020-12-23 00:28:48,246 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 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 00:28:49,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 00:28:49,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:28:49,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:28:49,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:28:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1979 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 1834 trivial. 0 not checked. [2020-12-23 00:28:49,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:49,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 52 [2020-12-23 00:28:49,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368755455] [2020-12-23 00:28:49,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 00:28:49,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:49,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 00:28:49,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:28:49,425 INFO L87 Difference]: Start difference. First operand 204 states and 238 transitions. Second operand 52 states. [2020-12-23 00:28:49,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:49,827 INFO L93 Difference]: Finished difference Result 347 states and 424 transitions. [2020-12-23 00:28:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 00:28:49,828 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 203 [2020-12-23 00:28:49,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:49,832 INFO L225 Difference]: With dead ends: 347 [2020-12-23 00:28:49,832 INFO L226 Difference]: Without dead ends: 222 [2020-12-23 00:28:49,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:28:49,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-23 00:28:49,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2020-12-23 00:28:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-23 00:28:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 252 transitions. [2020-12-23 00:28:49,863 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 252 transitions. Word has length 203 [2020-12-23 00:28:49,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:49,866 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 252 transitions. [2020-12-23 00:28:49,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 00:28:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 252 transitions. [2020-12-23 00:28:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-23 00:28:49,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:49,867 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:50,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 00:28:50,082 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:50,083 INFO L82 PathProgramCache]: Analyzing trace with hash 766279978, now seen corresponding path program 40 times [2020-12-23 00:28:50,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:50,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834479038] [2020-12-23 00:28:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2020-12-23 00:28:51,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834479038] [2020-12-23 00:28:51,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178598123] [2020-12-23 00:28:51,072 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 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 00:28:51,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:28:51,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:28:51,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:28:51,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:28:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2020-12-23 00:28:51,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:51,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 00:28:51,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860123214] [2020-12-23 00:28:51,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:28:51,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:51,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:28:51,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:28:51,426 INFO L87 Difference]: Start difference. First operand 215 states and 252 transitions. Second operand 43 states. [2020-12-23 00:28:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:51,588 INFO L93 Difference]: Finished difference Result 352 states and 426 transitions. [2020-12-23 00:28:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:28:51,588 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 214 [2020-12-23 00:28:51,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:51,589 INFO L225 Difference]: With dead ends: 352 [2020-12-23 00:28:51,590 INFO L226 Difference]: Without dead ends: 218 [2020-12-23 00:28:51,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:28:51,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-23 00:28:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2020-12-23 00:28:51,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 00:28:51,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 254 transitions. [2020-12-23 00:28:51,597 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 254 transitions. Word has length 214 [2020-12-23 00:28:51,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:51,597 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 254 transitions. [2020-12-23 00:28:51,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:28:51,597 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 254 transitions. [2020-12-23 00:28:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-23 00:28:51,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:51,599 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:51,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:28:51,813 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:51,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:51,813 INFO L82 PathProgramCache]: Analyzing trace with hash 558504108, now seen corresponding path program 41 times [2020-12-23 00:28:51,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:51,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470784543] [2020-12-23 00:28:51,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2228 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2020-12-23 00:28:52,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470784543] [2020-12-23 00:28:52,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140456394] [2020-12-23 00:28:52,803 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 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