/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-lopstr16/base_case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:04:43,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:04:43,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:04:43,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:04:43,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:04:43,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:04:43,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:04:43,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:04:43,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:04:43,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:04:43,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:04:43,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:04:43,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:04:43,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:04:43,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:04:43,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:04:43,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:04:43,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:04:43,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:04:43,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:04:43,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:04:43,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:04:43,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:04:43,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:04:43,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:04:43,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:04:43,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:04:43,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:04:43,790 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 11:04:43,842 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:04:43,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:04:43,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:04:43,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:04:43,849 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:04:43,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:04:43,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:04:43,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:04:43,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:04:43,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:04:43,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:04:43,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:04:43,872 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:04:43,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:04:43,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:04:43,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:04:43,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:04:43,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:04:43,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:04:43,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:04:43,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:04:43,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:04:43,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:04:43,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:04:43,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:04:43,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:04:44,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:04:44,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:04:44,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:04:44,406 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:04:44,407 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:04:44,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/base_case.i [2021-01-06 11:04:44,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f6963ac16/8f5c67b088b3473c84edd07c504bb336/FLAG291a1250f [2021-01-06 11:04:45,278 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:04:45,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/base_case.i [2021-01-06 11:04:45,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f6963ac16/8f5c67b088b3473c84edd07c504bb336/FLAG291a1250f [2021-01-06 11:04:45,560 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f6963ac16/8f5c67b088b3473c84edd07c504bb336 [2021-01-06 11:04:45,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:04:45,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:04:45,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:04:45,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:04:45,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:04:45,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:04:45" (1/1) ... [2021-01-06 11:04:45,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17c42472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:04:45, skipping insertion in model container [2021-01-06 11:04:45,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:04:45" (1/1) ... [2021-01-06 11:04:45,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:04:45,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:04:45,794 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s1~0,],base],StructAccessExpression[IdentifierExpression[~s1~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s1~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~s1~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s1~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~s1~0,],offset]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:04:45,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:04:45,843 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:04:45,859 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s1~0,],base],StructAccessExpression[IdentifierExpression[~s1~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s1~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~s1~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s1~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~s1~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:04:45,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:04:45,892 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:04:45,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:04:45 WrapperNode [2021-01-06 11:04:45,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:04:45,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:04:45,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:04:45,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:04:45,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:04:45" (1/1) ... [2021-01-06 11:04:45,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:04:45" (1/1) ... [2021-01-06 11:04:45,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:04:45,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:04:45,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:04:45,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:04:45,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:04:45" (1/1) ... [2021-01-06 11:04:45,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:04:45" (1/1) ... [2021-01-06 11:04:45,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:04:45" (1/1) ... [2021-01-06 11:04:45,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:04:45" (1/1) ... [2021-01-06 11:04:46,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:04:45" (1/1) ... [2021-01-06 11:04:46,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:04:45" (1/1) ... [2021-01-06 11:04:46,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:04:45" (1/1) ... [2021-01-06 11:04:46,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:04:46,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:04:46,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:04:46,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:04:46,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:04:45" (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 11:04:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-01-06 11:04:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:04:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-01-06 11:04:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:04:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:04:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 11:04:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:04:46,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:04:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:04:46,538 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:04:46,539 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 11:04:46,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:04:46 BoogieIcfgContainer [2021-01-06 11:04:46,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:04:46,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:04:46,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:04:46,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:04:46,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:04:45" (1/3) ... [2021-01-06 11:04:46,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f283987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:04:46, skipping insertion in model container [2021-01-06 11:04:46,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:04:45" (2/3) ... [2021-01-06 11:04:46,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f283987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:04:46, skipping insertion in model container [2021-01-06 11:04:46,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:04:46" (3/3) ... [2021-01-06 11:04:46,556 INFO L111 eAbstractionObserver]: Analyzing ICFG base_case.i [2021-01-06 11:04:46,569 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:04:46,576 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:04:46,603 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:04:46,661 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:04:46,661 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:04:46,662 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:04:46,662 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:04:46,662 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:04:46,662 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:04:46,663 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:04:46,663 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:04:46,684 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 11:04:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 11:04:46,692 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:46,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:46,694 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash 590963434, now seen corresponding path program 1 times [2021-01-06 11:04:46,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:46,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931199804] [2021-01-06 11:04:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:46,950 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 11:04:46,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931199804] [2021-01-06 11:04:46,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:04:46,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:04:46,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994292241] [2021-01-06 11:04:46,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:04:46,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:46,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:04:46,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:04:46,988 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2021-01-06 11:04:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:47,009 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-01-06 11:04:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:04:47,011 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 11:04:47,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:47,039 INFO L225 Difference]: With dead ends: 30 [2021-01-06 11:04:47,040 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 11:04:47,046 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 11:04:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 11:04:47,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 11:04:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 11:04:47,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-01-06 11:04:47,088 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-01-06 11:04:47,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:47,089 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-01-06 11:04:47,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:04:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-01-06 11:04:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 11:04:47,091 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:47,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:47,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:04:47,093 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:47,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:47,096 INFO L82 PathProgramCache]: Analyzing trace with hash 218784471, now seen corresponding path program 1 times [2021-01-06 11:04:47,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:47,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413282638] [2021-01-06 11:04:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:47,196 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 11:04:47,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413282638] [2021-01-06 11:04:47,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:04:47,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:04:47,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419258714] [2021-01-06 11:04:47,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:04:47,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:47,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:04:47,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:04:47,201 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2021-01-06 11:04:47,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:47,256 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-01-06 11:04:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:04:47,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-01-06 11:04:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:47,258 INFO L225 Difference]: With dead ends: 33 [2021-01-06 11:04:47,258 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 11:04:47,260 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 11:04:47,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 11:04:47,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2021-01-06 11:04:47,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 11:04:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-01-06 11:04:47,265 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2021-01-06 11:04:47,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:47,266 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-01-06 11:04:47,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:04:47,266 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-01-06 11:04:47,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 11:04:47,267 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:47,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:47,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:04:47,268 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:47,268 INFO L82 PathProgramCache]: Analyzing trace with hash 212359228, now seen corresponding path program 1 times [2021-01-06 11:04:47,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:47,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959109171] [2021-01-06 11:04:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:47,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959109171] [2021-01-06 11:04:47,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928781350] [2021-01-06 11:04:47,370 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 11:04:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:47,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 11:04:47,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:47,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:47,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 11:04:47,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373184018] [2021-01-06 11:04:47,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 11:04:47,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:47,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 11:04:47,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:04:47,558 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 5 states. [2021-01-06 11:04:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:47,618 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-01-06 11:04:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:04:47,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 11:04:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:47,620 INFO L225 Difference]: With dead ends: 44 [2021-01-06 11:04:47,620 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 11:04:47,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 11:04:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 11:04:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 19. [2021-01-06 11:04:47,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 11:04:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-01-06 11:04:47,627 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-01-06 11:04:47,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:47,627 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-01-06 11:04:47,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 11:04:47,628 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-01-06 11:04:47,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 11:04:47,628 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:47,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:47,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 11:04:47,845 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:47,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:47,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2010321697, now seen corresponding path program 2 times [2021-01-06 11:04:47,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:47,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986710728] [2021-01-06 11:04:47,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:48,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986710728] [2021-01-06 11:04:48,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136669496] [2021-01-06 11:04:48,019 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 11:04:48,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:04:48,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:48,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 11:04:48,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:48,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:48,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 11:04:48,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986117380] [2021-01-06 11:04:48,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:04:48,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:48,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:04:48,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:04:48,158 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 6 states. [2021-01-06 11:04:48,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:48,209 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2021-01-06 11:04:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 11:04:48,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2021-01-06 11:04:48,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:48,211 INFO L225 Difference]: With dead ends: 55 [2021-01-06 11:04:48,211 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 11:04:48,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 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 11:04:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 11:04:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 23. [2021-01-06 11:04:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 11:04:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-01-06 11:04:48,218 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2021-01-06 11:04:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:48,218 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-01-06 11:04:48,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:04:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-01-06 11:04:48,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 11:04:48,219 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:48,219 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:48,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:48,433 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:48,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:48,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2018782330, now seen corresponding path program 3 times [2021-01-06 11:04:48,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:48,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942921850] [2021-01-06 11:04:48,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:48,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942921850] [2021-01-06 11:04:48,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403378492] [2021-01-06 11:04:48,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:04:48,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 11:04:48,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:48,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:04:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:48,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:48,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 11:04:48,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4636599] [2021-01-06 11:04:48,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 11:04:48,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:48,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 11:04:48,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:04:48,712 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2021-01-06 11:04:48,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:48,775 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-01-06 11:04:48,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:04:48,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2021-01-06 11:04:48,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:48,777 INFO L225 Difference]: With dead ends: 66 [2021-01-06 11:04:48,777 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 11:04:48,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 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 11:04:48,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 11:04:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 27. [2021-01-06 11:04:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 11:04:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-01-06 11:04:48,785 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 20 [2021-01-06 11:04:48,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:48,785 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-01-06 11:04:48,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 11:04:48,785 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-01-06 11:04:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 11:04:48,786 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:48,786 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:49,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:49,001 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:49,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2102142613, now seen corresponding path program 4 times [2021-01-06 11:04:49,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:49,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518777726] [2021-01-06 11:04:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:49,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518777726] [2021-01-06 11:04:49,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137572411] [2021-01-06 11:04:49,221 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 11:04:50,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:04:50,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:50,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:04:50,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:50,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:50,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 11:04:50,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69345017] [2021-01-06 11:04:50,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 11:04:50,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:50,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 11:04:50,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:04:50,725 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 8 states. [2021-01-06 11:04:50,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:50,805 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2021-01-06 11:04:50,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:04:50,806 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2021-01-06 11:04:50,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:50,807 INFO L225 Difference]: With dead ends: 77 [2021-01-06 11:04:50,807 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 11:04:50,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 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 11:04:50,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 11:04:50,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 31. [2021-01-06 11:04:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 11:04:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-01-06 11:04:50,815 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 24 [2021-01-06 11:04:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:50,815 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-01-06 11:04:50,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 11:04:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-01-06 11:04:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 11:04:50,817 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:50,817 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:51,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:51,032 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:51,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:51,033 INFO L82 PathProgramCache]: Analyzing trace with hash 214721744, now seen corresponding path program 5 times [2021-01-06 11:04:51,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:51,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10243056] [2021-01-06 11:04:51,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:51,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10243056] [2021-01-06 11:04:51,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093454658] [2021-01-06 11:04:51,143 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 11:04:52,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 11:04:52,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:52,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 11:04:52,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:52,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:52,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 11:04:52,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619326611] [2021-01-06 11:04:52,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:04:52,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:52,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:04:52,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:04:52,720 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 9 states. [2021-01-06 11:04:52,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:52,808 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2021-01-06 11:04:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:04:52,809 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2021-01-06 11:04:52,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:52,810 INFO L225 Difference]: With dead ends: 88 [2021-01-06 11:04:52,810 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 11:04:52,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 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 11:04:52,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 11:04:52,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 35. [2021-01-06 11:04:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 11:04:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-01-06 11:04:52,820 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 28 [2021-01-06 11:04:52,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:52,821 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-01-06 11:04:52,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:04:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-01-06 11:04:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 11:04:52,822 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:52,822 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:53,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 11:04:53,036 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:53,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:53,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2000074165, now seen corresponding path program 6 times [2021-01-06 11:04:53,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:53,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349705538] [2021-01-06 11:04:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:53,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349705538] [2021-01-06 11:04:53,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224763303] [2021-01-06 11:04:53,171 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 11:04:57,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 11:04:57,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:57,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:04:57,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:57,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:57,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 11:04:57,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059140431] [2021-01-06 11:04:57,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:04:57,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:57,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:04:57,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:04:57,743 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 10 states. [2021-01-06 11:04:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:57,890 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2021-01-06 11:04:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:04:57,891 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2021-01-06 11:04:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:57,893 INFO L225 Difference]: With dead ends: 99 [2021-01-06 11:04:57,893 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 11:04:57,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 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 11:04:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 11:04:57,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 39. [2021-01-06 11:04:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 11:04:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-01-06 11:04:57,919 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 32 [2021-01-06 11:04:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:57,919 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-01-06 11:04:57,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:04:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-01-06 11:04:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 11:04:57,928 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:57,929 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:58,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:58,130 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:58,132 INFO L82 PathProgramCache]: Analyzing trace with hash 278137882, now seen corresponding path program 7 times [2021-01-06 11:04:58,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:58,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995447659] [2021-01-06 11:04:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:58,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995447659] [2021-01-06 11:04:58,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326188384] [2021-01-06 11:04:58,294 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 11:04:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 11:04:58,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:58,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:58,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 11:04:58,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538850797] [2021-01-06 11:04:58,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:04:58,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:04:58,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:04:58,507 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 11 states. [2021-01-06 11:04:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:58,626 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2021-01-06 11:04:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:04:58,626 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2021-01-06 11:04:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:58,628 INFO L225 Difference]: With dead ends: 110 [2021-01-06 11:04:58,628 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 11:04:58,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 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 11:04:58,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 11:04:58,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 43. [2021-01-06 11:04:58,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 11:04:58,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2021-01-06 11:04:58,635 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 36 [2021-01-06 11:04:58,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:58,635 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2021-01-06 11:04:58,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:04:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2021-01-06 11:04:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 11:04:58,637 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:58,637 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:58,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:58,851 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:58,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1961207807, now seen corresponding path program 8 times [2021-01-06 11:04:58,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:58,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888797198] [2021-01-06 11:04:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:59,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888797198] [2021-01-06 11:04:59,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252297921] [2021-01-06 11:04:59,099 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 11:04:59,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:04:59,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:59,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:04:59,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:59,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:59,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 11:04:59,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844469666] [2021-01-06 11:04:59,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 11:04:59,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:59,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 11:04:59,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:04:59,325 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 12 states. [2021-01-06 11:04:59,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:59,463 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2021-01-06 11:04:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:04:59,464 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2021-01-06 11:04:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:59,465 INFO L225 Difference]: With dead ends: 121 [2021-01-06 11:04:59,465 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 11:04:59,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:04:59,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 11:04:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 47. [2021-01-06 11:04:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 11:04:59,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2021-01-06 11:04:59,476 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 40 [2021-01-06 11:04:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:59,478 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2021-01-06 11:04:59,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 11:04:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2021-01-06 11:04:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 11:04:59,485 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:59,485 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:59,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 11:04:59,687 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:59,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:59,688 INFO L82 PathProgramCache]: Analyzing trace with hash -577975964, now seen corresponding path program 9 times [2021-01-06 11:04:59,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:59,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726991742] [2021-01-06 11:04:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:59,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726991742] [2021-01-06 11:04:59,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357769450] [2021-01-06 11:04:59,910 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