/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-programs/copysome1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:28:14,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:28:14,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:28:14,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:28:14,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:28:14,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:28:14,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:28:14,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:28:14,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:28:14,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:28:14,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:28:14,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:28:14,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:28:14,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:28:14,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:28:14,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:28:14,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:28:14,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:28:14,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:28:14,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:28:14,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:28:14,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:28:14,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:28:14,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:28:14,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:28:14,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:28:14,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:28:14,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:28:14,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:28:14,561 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:28:14,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:28:14,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:28:14,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:28:14,567 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:28:14,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:28:14,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:28:14,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:28:14,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:28:14,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:28:14,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:28:14,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:28:14,570 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:28:14,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:28:14,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:28:14,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:28:14,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:28:14,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:28:14,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:28:14,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:28:14,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:28:14,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:28:14,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:28:14,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:28:14,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:28:14,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:28:15,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:28:15,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:28:15,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:28:15,088 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:28:15,089 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:28:15,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/copysome1-2.i [2021-01-06 10:28:15,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0ba0fb4b9/c14bea532a494365acda4050fc2b7b14/FLAG3fedc0a37 [2021-01-06 10:28:16,010 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:28:16,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/copysome1-2.i [2021-01-06 10:28:16,020 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0ba0fb4b9/c14bea532a494365acda4050fc2b7b14/FLAG3fedc0a37 [2021-01-06 10:28:16,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0ba0fb4b9/c14bea532a494365acda4050fc2b7b14 [2021-01-06 10:28:16,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:28:16,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:28:16,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:16,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:28:16,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:28:16,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:16" (1/1) ... [2021-01-06 10:28:16,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ee1a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:16, skipping insertion in model container [2021-01-06 10:28:16,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:16" (1/1) ... [2021-01-06 10:28:16,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:28:16,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:28:16,567 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/copysome1-2.i[805,818] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 10:28:16,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:16,604 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:28:16,620 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/copysome1-2.i[805,818] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 10:28:16,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:16,650 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:28:16,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:16 WrapperNode [2021-01-06 10:28:16,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:16,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:16,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:28:16,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:28:16,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:16" (1/1) ... [2021-01-06 10:28:16,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:16" (1/1) ... [2021-01-06 10:28:16,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:16,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:28:16,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:28:16,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:28:16,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:16" (1/1) ... [2021-01-06 10:28:16,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:16" (1/1) ... [2021-01-06 10:28:16,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:16" (1/1) ... [2021-01-06 10:28:16,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:16" (1/1) ... [2021-01-06 10:28:16,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:16" (1/1) ... [2021-01-06 10:28:16,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:16" (1/1) ... [2021-01-06 10:28:16,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:16" (1/1) ... [2021-01-06 10:28:16,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:28:16,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:28:16,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:28:16,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:28:16,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:16" (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 [2021-01-06 10:28:16,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:28:16,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:28:16,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:28:16,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:28:16,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:28:16,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:28:16,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:28:17,166 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:28:17,167 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 10:28:17,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:17 BoogieIcfgContainer [2021-01-06 10:28:17,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:28:17,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:28:17,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:28:17,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:28:17,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:28:16" (1/3) ... [2021-01-06 10:28:17,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13541261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:17, skipping insertion in model container [2021-01-06 10:28:17,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:16" (2/3) ... [2021-01-06 10:28:17,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13541261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:17, skipping insertion in model container [2021-01-06 10:28:17,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:17" (3/3) ... [2021-01-06 10:28:17,181 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2021-01-06 10:28:17,190 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:28:17,196 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:28:17,224 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:28:17,331 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:28:17,331 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:28:17,332 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:28:17,332 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:28:17,332 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:28:17,332 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:28:17,332 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:28:17,333 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:28:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 10:28:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:28:17,373 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:17,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:17,376 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:17,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:17,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2021-01-06 10:28:17,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:17,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067064757] [2021-01-06 10:28:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:17,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067064757] [2021-01-06 10:28:17,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:17,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:28:17,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136412210] [2021-01-06 10:28:17,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:28:17,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:17,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:28:17,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:28:17,709 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 10:28:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:17,738 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-01-06 10:28:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:28:17,739 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 10:28:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:17,768 INFO L225 Difference]: With dead ends: 36 [2021-01-06 10:28:17,768 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 10:28:17,773 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 [2021-01-06 10:28:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 10:28:17,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 10:28:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 10:28:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-01-06 10:28:17,823 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2021-01-06 10:28:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:17,823 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-01-06 10:28:17,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:28:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-01-06 10:28:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:28:17,826 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:17,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:17,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:28:17,828 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:17,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:17,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1919336157, now seen corresponding path program 1 times [2021-01-06 10:28:17,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:17,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535892351] [2021-01-06 10:28:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:17,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535892351] [2021-01-06 10:28:17,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:17,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:28:17,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221835027] [2021-01-06 10:28:17,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:28:17,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:17,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:28:17,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:28:17,921 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 3 states. [2021-01-06 10:28:18,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:18,013 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-01-06 10:28:18,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:28:18,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 10:28:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:18,016 INFO L225 Difference]: With dead ends: 33 [2021-01-06 10:28:18,016 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 10:28:18,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:28:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 10:28:18,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-01-06 10:28:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:28:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-01-06 10:28:18,028 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-01-06 10:28:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:18,028 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-01-06 10:28:18,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:28:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-01-06 10:28:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:28:18,030 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:18,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:18,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:28:18,032 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:18,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2021-01-06 10:28:18,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:18,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719530241] [2021-01-06 10:28:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:28:18,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719530241] [2021-01-06 10:28:18,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009021050] [2021-01-06 10:28:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:18,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:28:18,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:28:18,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:18,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:28:18,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410202490] [2021-01-06 10:28:18,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:28:18,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:18,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:28:18,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:28:18,314 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2021-01-06 10:28:18,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:18,369 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-01-06 10:28:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:28:18,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-06 10:28:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:18,371 INFO L225 Difference]: With dead ends: 39 [2021-01-06 10:28:18,371 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:28:18,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:28:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:28:18,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-01-06 10:28:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 10:28:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-01-06 10:28:18,384 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2021-01-06 10:28:18,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:18,385 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-01-06 10:28:18,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:28:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-01-06 10:28:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:28:18,389 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:18,389 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:18,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:28:18,592 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:18,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2030845279, now seen corresponding path program 2 times [2021-01-06 10:28:18,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:18,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818760488] [2021-01-06 10:28:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:28:18,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818760488] [2021-01-06 10:28:18,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090781654] [2021-01-06 10:28:18,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:18,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:18,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:18,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:28:18,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:28:18,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:18,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:28:18,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255462844] [2021-01-06 10:28:18,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:28:18,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:28:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:28:18,880 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 6 states. [2021-01-06 10:28:18,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:18,940 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2021-01-06 10:28:18,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:28:18,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2021-01-06 10:28:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:18,942 INFO L225 Difference]: With dead ends: 47 [2021-01-06 10:28:18,942 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:28:18,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:28:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:28:18,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-01-06 10:28:18,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:28:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-01-06 10:28:18,949 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 20 [2021-01-06 10:28:18,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:18,950 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-01-06 10:28:18,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:28:18,950 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-01-06 10:28:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:28:18,951 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:18,951 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:19,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:19,165 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:19,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash -224231843, now seen corresponding path program 3 times [2021-01-06 10:28:19,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:19,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895770374] [2021-01-06 10:28:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 10:28:19,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895770374] [2021-01-06 10:28:19,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303756099] [2021-01-06 10:28:19,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:19,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:28:19,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:19,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:28:19,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 10:28:19,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:19,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:28:19,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759224035] [2021-01-06 10:28:19,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:28:19,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:19,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:28:19,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:28:19,457 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 7 states. [2021-01-06 10:28:19,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:19,547 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-01-06 10:28:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:28:19,549 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2021-01-06 10:28:19,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:19,550 INFO L225 Difference]: With dead ends: 55 [2021-01-06 10:28:19,550 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 10:28:19,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:28:19,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 10:28:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-01-06 10:28:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:28:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-01-06 10:28:19,558 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 25 [2021-01-06 10:28:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:19,558 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-01-06 10:28:19,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:28:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-01-06 10:28:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:28:19,560 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:19,560 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:19,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:19,774 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:19,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:19,776 INFO L82 PathProgramCache]: Analyzing trace with hash -736833947, now seen corresponding path program 4 times [2021-01-06 10:28:19,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:19,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114904531] [2021-01-06 10:28:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:28:19,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114904531] [2021-01-06 10:28:19,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191353384] [2021-01-06 10:28:19,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:20,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:28:20,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:20,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:28:20,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:28:20,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:20,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 10:28:20,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977150549] [2021-01-06 10:28:20,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:28:20,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:20,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:28:20,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:28:20,083 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 8 states. [2021-01-06 10:28:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:20,160 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2021-01-06 10:28:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:28:20,161 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2021-01-06 10:28:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:20,162 INFO L225 Difference]: With dead ends: 63 [2021-01-06 10:28:20,162 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:28:20,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:28:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:28:20,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-01-06 10:28:20,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:28:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-01-06 10:28:20,170 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 30 [2021-01-06 10:28:20,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:20,170 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-01-06 10:28:20,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:28:20,170 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-01-06 10:28:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:28:20,172 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:20,172 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:20,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:20,388 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:20,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:20,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1407538841, now seen corresponding path program 5 times [2021-01-06 10:28:20,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:20,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387077351] [2021-01-06 10:28:20,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 10:28:20,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387077351] [2021-01-06 10:28:20,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640501986] [2021-01-06 10:28:20,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:20,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 10:28:20,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:20,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:28:20,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 10:28:20,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:20,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:28:20,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395514311] [2021-01-06 10:28:20,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:28:20,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:20,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:28:20,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:20,853 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2021-01-06 10:28:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:20,975 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2021-01-06 10:28:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:28:20,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2021-01-06 10:28:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:20,982 INFO L225 Difference]: With dead ends: 71 [2021-01-06 10:28:20,983 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 10:28:20,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 10:28:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-01-06 10:28:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 10:28:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-01-06 10:28:20,996 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 35 [2021-01-06 10:28:20,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:20,997 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-01-06 10:28:20,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:28:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-01-06 10:28:20,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 10:28:20,998 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:20,998 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:21,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:28:21,212 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:21,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:21,213 INFO L82 PathProgramCache]: Analyzing trace with hash 968499753, now seen corresponding path program 6 times [2021-01-06 10:28:21,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:21,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7011132] [2021-01-06 10:28:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 10:28:21,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7011132] [2021-01-06 10:28:21,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276342604] [2021-01-06 10:28:21,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:21,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:28:21,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:21,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:28:21,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:28:21,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:21,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:28:21,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405123660] [2021-01-06 10:28:21,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:28:21,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:21,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:28:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:21,598 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 10 states. [2021-01-06 10:28:21,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:21,699 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2021-01-06 10:28:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:28:21,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2021-01-06 10:28:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:21,701 INFO L225 Difference]: With dead ends: 79 [2021-01-06 10:28:21,701 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:28:21,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:21,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:28:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-01-06 10:28:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:28:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-01-06 10:28:21,707 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 40 [2021-01-06 10:28:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:21,707 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-01-06 10:28:21,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:28:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-01-06 10:28:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:28:21,709 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:21,709 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:21,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:21,920 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1016346923, now seen corresponding path program 7 times [2021-01-06 10:28:21,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:21,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659860565] [2021-01-06 10:28:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:28:22,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659860565] [2021-01-06 10:28:22,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613420368] [2021-01-06 10:28:22,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:22,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:28:22,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:28:22,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:22,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:28:22,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591150579] [2021-01-06 10:28:22,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:28:22,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:22,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:28:22,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:22,249 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 11 states. [2021-01-06 10:28:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:22,375 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2021-01-06 10:28:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:28:22,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2021-01-06 10:28:22,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:22,376 INFO L225 Difference]: With dead ends: 87 [2021-01-06 10:28:22,377 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 10:28:22,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:22,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 10:28:22,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-01-06 10:28:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 10:28:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-01-06 10:28:22,383 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 45 [2021-01-06 10:28:22,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:22,383 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-01-06 10:28:22,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:28:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-01-06 10:28:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 10:28:22,385 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:22,385 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:22,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:22,599 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:22,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1143734803, now seen corresponding path program 8 times [2021-01-06 10:28:22,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:22,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4644194] [2021-01-06 10:28:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 10:28:22,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4644194] [2021-01-06 10:28:22,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5803617] [2021-01-06 10:28:22,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:22,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:22,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:22,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:28:22,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 10:28:22,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:22,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:28:22,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649369366] [2021-01-06 10:28:22,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:28:22,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:22,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:28:22,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:28:22,933 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 12 states. [2021-01-06 10:28:23,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:23,072 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2021-01-06 10:28:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:28:23,073 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2021-01-06 10:28:23,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:23,074 INFO L225 Difference]: With dead ends: 95 [2021-01-06 10:28:23,074 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 10:28:23,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:28:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 10:28:23,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-01-06 10:28:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 10:28:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2021-01-06 10:28:23,082 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 50 [2021-01-06 10:28:23,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:23,083 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2021-01-06 10:28:23,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:28:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2021-01-06 10:28:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:28:23,084 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:23,084 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:23,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:28:23,299 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:23,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:23,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1908772625, now seen corresponding path program 9 times [2021-01-06 10:28:23,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:23,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752839005] [2021-01-06 10:28:23,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 10:28:23,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752839005] [2021-01-06 10:28:23,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561481098] [2021-01-06 10:28:23,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:25,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:28:25,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:25,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:28:25,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 10:28:26,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:26,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:28:26,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591168609] [2021-01-06 10:28:26,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:28:26,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:26,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:28:26,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:28:26,074 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 13 states. [2021-01-06 10:28:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:26,233 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2021-01-06 10:28:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:28:26,233 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2021-01-06 10:28:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:26,234 INFO L225 Difference]: With dead ends: 103 [2021-01-06 10:28:26,234 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 10:28:26,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:28:26,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 10:28:26,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-01-06 10:28:26,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:28:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-01-06 10:28:26,242 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 55 [2021-01-06 10:28:26,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:26,242 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-01-06 10:28:26,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:28:26,242 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-01-06 10:28:26,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 10:28:26,243 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:26,244 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:26,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:26,460 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:26,461 INFO L82 PathProgramCache]: Analyzing trace with hash -967663183, now seen corresponding path program 10 times [2021-01-06 10:28:26,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:26,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715672624] [2021-01-06 10:28:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 10:28:26,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715672624] [2021-01-06 10:28:26,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817012038] [2021-01-06 10:28:26,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:26,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:28:26,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:28:26,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 10:28:26,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:26,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:28:26,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893371190] [2021-01-06 10:28:26,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:28:26,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:26,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:28:26,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:28:26,980 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 14 states. [2021-01-06 10:28:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:27,129 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2021-01-06 10:28:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:28:27,130 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2021-01-06 10:28:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:27,131 INFO L225 Difference]: With dead ends: 111 [2021-01-06 10:28:27,131 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:28:27,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:28:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:28:27,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-01-06 10:28:27,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:28:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-01-06 10:28:27,139 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 60 [2021-01-06 10:28:27,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:27,139 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-01-06 10:28:27,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:28:27,139 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-01-06 10:28:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:28:27,140 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:27,140 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:27,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:27,354 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:27,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2055049395, now seen corresponding path program 11 times [2021-01-06 10:28:27,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:27,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435994790] [2021-01-06 10:28:27,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-01-06 10:28:27,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435994790] [2021-01-06 10:28:27,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699308372] [2021-01-06 10:28:27,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:59,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 10:28:59,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:59,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:28:59,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-01-06 10:28:59,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:59,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 10:28:59,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134071900] [2021-01-06 10:28:59,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:28:59,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:59,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:28:59,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:28:59,545 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 15 states. [2021-01-06 10:28:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:59,725 INFO L93 Difference]: Finished difference Result 119 states and 150 transitions. [2021-01-06 10:28:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:28:59,727 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2021-01-06 10:28:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:59,728 INFO L225 Difference]: With dead ends: 119 [2021-01-06 10:28:59,728 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 10:28:59,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:28:59,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 10:28:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-01-06 10:28:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 10:28:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2021-01-06 10:28:59,735 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 65 [2021-01-06 10:28:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:59,736 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2021-01-06 10:28:59,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:28:59,736 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2021-01-06 10:28:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 10:28:59,737 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:59,737 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:59,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:28:59,951 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:59,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:59,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1898335605, now seen corresponding path program 12 times [2021-01-06 10:28:59,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:59,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800678525] [2021-01-06 10:28:59,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 10:29:00,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800678525] [2021-01-06 10:29:00,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702160835] [2021-01-06 10:29:00,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:10,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:29:10,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:10,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:29:10,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 10:29:10,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:10,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:29:10,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620074590] [2021-01-06 10:29:10,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:29:10,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:10,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:29:10,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:29:10,223 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 16 states. [2021-01-06 10:29:10,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:10,367 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2021-01-06 10:29:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:29:10,368 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2021-01-06 10:29:10,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:10,369 INFO L225 Difference]: With dead ends: 127 [2021-01-06 10:29:10,369 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 10:29:10,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:29:10,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 10:29:10,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-01-06 10:29:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 10:29:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2021-01-06 10:29:10,375 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 70 [2021-01-06 10:29:10,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:10,375 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2021-01-06 10:29:10,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:29:10,375 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2021-01-06 10:29:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 10:29:10,376 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:10,377 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:10,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:29:10,592 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:10,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:10,593 INFO L82 PathProgramCache]: Analyzing trace with hash -684578935, now seen corresponding path program 13 times [2021-01-06 10:29:10,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:10,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459860159] [2021-01-06 10:29:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 10:29:10,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459860159] [2021-01-06 10:29:10,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54060795] [2021-01-06 10:29:10,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:10,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:29:10,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 10:29:10,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:10,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 10:29:10,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715278714] [2021-01-06 10:29:10,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:29:10,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:10,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:29:10,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:29:10,994 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 17 states. [2021-01-06 10:29:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:11,155 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2021-01-06 10:29:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:29:11,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2021-01-06 10:29:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:11,156 INFO L225 Difference]: With dead ends: 135 [2021-01-06 10:29:11,156 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 10:29:11,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:29:11,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 10:29:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-01-06 10:29:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:29:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-01-06 10:29:11,161 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 75 [2021-01-06 10:29:11,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:11,162 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-01-06 10:29:11,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:29:11,162 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-01-06 10:29:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 10:29:11,163 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:11,163 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:11,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:29:11,373 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:11,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1002487495, now seen corresponding path program 14 times [2021-01-06 10:29:11,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:11,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112242850] [2021-01-06 10:29:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-01-06 10:29:11,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112242850] [2021-01-06 10:29:11,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113738787] [2021-01-06 10:29:11,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:11,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:11,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:11,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:29:11,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-01-06 10:29:11,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:11,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 10:29:11,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587404507] [2021-01-06 10:29:11,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:29:11,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:11,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:29:11,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:29:11,810 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 18 states. [2021-01-06 10:29:11,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:11,991 INFO L93 Difference]: Finished difference Result 143 states and 180 transitions. [2021-01-06 10:29:11,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:29:11,992 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2021-01-06 10:29:11,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:11,993 INFO L225 Difference]: With dead ends: 143 [2021-01-06 10:29:11,993 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 10:29:11,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:29:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 10:29:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-01-06 10:29:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:29:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2021-01-06 10:29:11,999 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 80 [2021-01-06 10:29:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:11,999 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2021-01-06 10:29:11,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:29:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2021-01-06 10:29:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 10:29:12,001 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:12,001 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:12,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:12,211 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:12,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:12,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1385924667, now seen corresponding path program 15 times [2021-01-06 10:29:12,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:12,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742592767] [2021-01-06 10:29:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 10:29:12,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742592767] [2021-01-06 10:29:12,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672921373] [2021-01-06 10:29:12,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:27,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 10:29:27,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:27,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:29:27,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 10:29:27,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:27,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:29:27,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148796685] [2021-01-06 10:29:27,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:29:27,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:27,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:29:27,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:29:27,501 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand 19 states. [2021-01-06 10:29:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:27,672 INFO L93 Difference]: Finished difference Result 151 states and 190 transitions. [2021-01-06 10:29:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:29:27,672 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2021-01-06 10:29:27,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:27,673 INFO L225 Difference]: With dead ends: 151 [2021-01-06 10:29:27,673 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 10:29:27,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:29:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 10:29:27,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-01-06 10:29:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 10:29:27,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2021-01-06 10:29:27,685 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 85 [2021-01-06 10:29:27,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:27,685 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2021-01-06 10:29:27,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:29:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2021-01-06 10:29:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 10:29:27,686 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:27,686 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:27,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:29:27,902 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:27,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:27,903 INFO L82 PathProgramCache]: Analyzing trace with hash -74597123, now seen corresponding path program 16 times [2021-01-06 10:29:27,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:27,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710115168] [2021-01-06 10:29:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 10:29:28,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710115168] [2021-01-06 10:29:28,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542488805] [2021-01-06 10:29:28,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:28,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:28,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:28,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:29:28,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 10:29:28,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:28,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:29:28,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881234809] [2021-01-06 10:29:28,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:29:28,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:28,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:29:28,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:29:28,511 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 20 states. [2021-01-06 10:29:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:28,739 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2021-01-06 10:29:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:29:28,740 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 90 [2021-01-06 10:29:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:28,740 INFO L225 Difference]: With dead ends: 159 [2021-01-06 10:29:28,740 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 10:29:28,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:29:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 10:29:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2021-01-06 10:29:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 10:29:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2021-01-06 10:29:28,746 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 90 [2021-01-06 10:29:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:28,746 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2021-01-06 10:29:28,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:29:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2021-01-06 10:29:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 10:29:28,747 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:28,747 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:28,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:29:28,963 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:28,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2024349697, now seen corresponding path program 17 times [2021-01-06 10:29:28,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:28,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738714399] [2021-01-06 10:29:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 10:29:29,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738714399] [2021-01-06 10:29:29,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885864075] [2021-01-06 10:29:29,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:03,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 10:31:03,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:04,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:31:04,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 10:31:04,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:31:04,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 10:31:04,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111099419] [2021-01-06 10:31:04,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:31:04,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:04,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:31:04,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:31:04,135 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand 21 states. [2021-01-06 10:31:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:04,378 INFO L93 Difference]: Finished difference Result 167 states and 210 transitions. [2021-01-06 10:31:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:31:04,378 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2021-01-06 10:31:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:04,380 INFO L225 Difference]: With dead ends: 167 [2021-01-06 10:31:04,380 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 10:31:04,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:31:04,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 10:31:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2021-01-06 10:31:04,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 10:31:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2021-01-06 10:31:04,391 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 95 [2021-01-06 10:31:04,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:04,391 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2021-01-06 10:31:04,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:31:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2021-01-06 10:31:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 10:31:04,393 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:04,393 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:04,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:04,594 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:04,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:04,595 INFO L82 PathProgramCache]: Analyzing trace with hash -889061183, now seen corresponding path program 18 times [2021-01-06 10:31:04,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:04,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653335530] [2021-01-06 10:31:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-01-06 10:31:04,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653335530] [2021-01-06 10:31:04,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312154193] [2021-01-06 10:31:04,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:34,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:32:34,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:34,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:32:34,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:32:34,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:32:34,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 10:32:34,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012256857] [2021-01-06 10:32:34,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:32:34,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:34,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:32:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:32:34,509 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand 22 states. [2021-01-06 10:32:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:34,756 INFO L93 Difference]: Finished difference Result 175 states and 220 transitions. [2021-01-06 10:32:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:32:34,757 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2021-01-06 10:32:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:34,758 INFO L225 Difference]: With dead ends: 175 [2021-01-06 10:32:34,758 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 10:32:34,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:32:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 10:32:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2021-01-06 10:32:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:32:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2021-01-06 10:32:34,764 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 100 [2021-01-06 10:32:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:34,765 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2021-01-06 10:32:34,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:32:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2021-01-06 10:32:34,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 10:32:34,766 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:34,766 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:34,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:34,978 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:34,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:34,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1886396355, now seen corresponding path program 19 times [2021-01-06 10:32:34,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:34,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774260995] [2021-01-06 10:32:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:32:35,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774260995] [2021-01-06 10:32:35,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380942613] [2021-01-06 10:32:35,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:35,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:32:35,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:32:35,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:32:35,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 10:32:35,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963381785] [2021-01-06 10:32:35,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:32:35,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:35,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:32:35,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:32:35,574 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand 23 states. [2021-01-06 10:32:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:35,815 INFO L93 Difference]: Finished difference Result 183 states and 230 transitions. [2021-01-06 10:32:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:32:35,816 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2021-01-06 10:32:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:35,817 INFO L225 Difference]: With dead ends: 183 [2021-01-06 10:32:35,817 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 10:32:35,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:32:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 10:32:35,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2021-01-06 10:32:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 10:32:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2021-01-06 10:32:35,822 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 105 [2021-01-06 10:32:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:35,822 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2021-01-06 10:32:35,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:32:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2021-01-06 10:32:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 10:32:35,824 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:35,824 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:36,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:36,038 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:36,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1567863675, now seen corresponding path program 20 times [2021-01-06 10:32:36,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:36,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081024252] [2021-01-06 10:32:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-01-06 10:32:36,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081024252] [2021-01-06 10:32:36,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002663639] [2021-01-06 10:32:36,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:36,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:32:36,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:36,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:32:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-01-06 10:32:36,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:32:36,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 10:32:36,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754191640] [2021-01-06 10:32:36,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:32:36,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:36,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:32:36,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:32:36,630 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand 24 states. [2021-01-06 10:32:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:36,884 INFO L93 Difference]: Finished difference Result 191 states and 240 transitions. [2021-01-06 10:32:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 10:32:36,887 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 110 [2021-01-06 10:32:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:36,888 INFO L225 Difference]: With dead ends: 191 [2021-01-06 10:32:36,888 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 10:32:36,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:32:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 10:32:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2021-01-06 10:32:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 10:32:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2021-01-06 10:32:36,894 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 110 [2021-01-06 10:32:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:36,894 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2021-01-06 10:32:36,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:32:36,894 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2021-01-06 10:32:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-06 10:32:36,896 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:36,896 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:37,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:32:37,110 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:37,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:37,111 INFO L82 PathProgramCache]: Analyzing trace with hash -358057863, now seen corresponding path program 21 times [2021-01-06 10:32:37,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:37,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227945976] [2021-01-06 10:32:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-01-06 10:32:37,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227945976] [2021-01-06 10:32:37,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077344099] [2021-01-06 10:32:37,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true