/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/sum_multi_array.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:13:04,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:13:04,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:13:04,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:13:04,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:13:04,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:13:04,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:13:04,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:13:04,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:13:04,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:13:04,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:13:04,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:13:04,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:13:04,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:13:04,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:13:04,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:13:04,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:13:04,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:13:04,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:13:04,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:13:04,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:13:04,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:13:04,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:13:04,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:13:04,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:13:04,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:13:04,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:13:04,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:13:04,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:13:04,773 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:13:04,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:13:04,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:13:04,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:13:04,776 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:13:04,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:13:04,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:13:04,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:13:04,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:13:04,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:13:04,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:13:04,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:13:04,777 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:13:04,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:13:04,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:13:04,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:13:04,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:13:04,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:13:04,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:13:04,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:13:04,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:13:04,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:13:04,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:13:04,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:13:04,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:13:04,780 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:13:05,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:13:05,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:13:05,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:13:05,464 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:13:05,465 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:13:05,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/sum_multi_array.i [2020-12-23 01:13:05,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ebf75a0aa/1f1c66bde5884cefa47b796250d304bb/FLAG1058f4178 [2020-12-23 01:13:06,511 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:13:06,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/sum_multi_array.i [2020-12-23 01:13:06,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ebf75a0aa/1f1c66bde5884cefa47b796250d304bb/FLAG1058f4178 [2020-12-23 01:13:06,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ebf75a0aa/1f1c66bde5884cefa47b796250d304bb [2020-12-23 01:13:06,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:13:06,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:13:06,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:13:06,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:13:06,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:13:06,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:13:06" (1/1) ... [2020-12-23 01:13:06,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1688fe0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:13:06, skipping insertion in model container [2020-12-23 01:13:06,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:13:06" (1/1) ... [2020-12-23 01:13:06,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:13:06,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:13:06,805 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/sum_multi_array.i[808,821] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]],n] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~b~0,GLOBAL],[IdentifierExpression[~i~0,]]],n] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~c~0,GLOBAL],[IdentifierExpression[~i~0,]]],n] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 01:13:06,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:13:26,577 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:13:26,612 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/sum_multi_array.i[808,821] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,GLOBAL],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[~#c~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#c~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 01:13:26,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:13:26,685 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:13:26,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:13:26 WrapperNode [2020-12-23 01:13:26,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:13:26,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:13:26,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:13:26,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:13:26,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:13:26" (1/1) ... [2020-12-23 01:13:26,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:13:26" (1/1) ... [2020-12-23 01:13:26,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:13:26,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:13:26,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:13:26,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:13:26,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:13:26" (1/1) ... [2020-12-23 01:13:26,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:13:26" (1/1) ... [2020-12-23 01:13:26,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:13:26" (1/1) ... [2020-12-23 01:13:26,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:13:26" (1/1) ... [2020-12-23 01:13:26,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:13:26" (1/1) ... [2020-12-23 01:13:26,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:13:26" (1/1) ... [2020-12-23 01:13:26,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:13:26" (1/1) ... [2020-12-23 01:13:26,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:13:26,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:13:26,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:13:26,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:13:26,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:13:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:13:27,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:13:27,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:13:27,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:13:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:13:27,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:13:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:13:27,694 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:13:27,695 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 01:13:27,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:13:27 BoogieIcfgContainer [2020-12-23 01:13:27,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:13:27,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:13:27,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:13:27,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:13:27,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:13:06" (1/3) ... [2020-12-23 01:13:27,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76aa7abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:13:27, skipping insertion in model container [2020-12-23 01:13:27,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:13:26" (2/3) ... [2020-12-23 01:13:27,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76aa7abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:13:27, skipping insertion in model container [2020-12-23 01:13:27,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:13:27" (3/3) ... [2020-12-23 01:13:27,728 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_multi_array.i [2020-12-23 01:13:27,739 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:13:27,756 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:13:27,793 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:13:27,858 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:13:27,858 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:13:27,858 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:13:27,863 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:13:27,863 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:13:27,863 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:13:27,864 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:13:27,864 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:13:27,904 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-23 01:13:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 01:13:27,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:27,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:27,923 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:27,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2020-12-23 01:13:27,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:27,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842765286] [2020-12-23 01:13:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:28,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842765286] [2020-12-23 01:13:28,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:13:28,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:13:28,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636919724] [2020-12-23 01:13:28,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:13:28,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:28,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:13:28,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:13:28,320 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-12-23 01:13:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:28,444 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2020-12-23 01:13:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:13:28,446 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 01:13:28,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:28,461 INFO L225 Difference]: With dead ends: 42 [2020-12-23 01:13:28,462 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 01:13:28,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:13:28,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 01:13:28,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2020-12-23 01:13:28,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 01:13:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-23 01:13:28,513 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2020-12-23 01:13:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:28,514 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-23 01:13:28,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:13:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-23 01:13:28,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 01:13:28,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:28,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:28,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:13:28,517 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:28,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:28,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2020-12-23 01:13:28,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:28,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600306460] [2020-12-23 01:13:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:13:28,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600306460] [2020-12-23 01:13:28,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995054051] [2020-12-23 01:13:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:28,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 01:13:28,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:13:28,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:28,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 01:13:28,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968323442] [2020-12-23 01:13:28,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:13:28,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:28,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:13:28,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:13:28,909 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-12-23 01:13:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:29,088 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-12-23 01:13:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:13:29,091 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 01:13:29,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:29,093 INFO L225 Difference]: With dead ends: 45 [2020-12-23 01:13:29,093 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 01:13:29,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:13:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 01:13:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2020-12-23 01:13:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 01:13:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-23 01:13:29,108 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2020-12-23 01:13:29,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:29,109 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-23 01:13:29,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:13:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-23 01:13:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 01:13:29,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:29,112 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:29,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 01:13:29,328 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:29,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:29,329 INFO L82 PathProgramCache]: Analyzing trace with hash -799235507, now seen corresponding path program 2 times [2020-12-23 01:13:29,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:29,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550876007] [2020-12-23 01:13:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 01:13:29,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550876007] [2020-12-23 01:13:29,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401107504] [2020-12-23 01:13:29,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:29,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:13:29,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:29,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 01:13:29,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 01:13:29,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:29,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 01:13:29,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467581122] [2020-12-23 01:13:29,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:13:29,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:29,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:13:29,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:13:29,698 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-12-23 01:13:29,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:29,877 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-12-23 01:13:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 01:13:29,878 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-23 01:13:29,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:29,879 INFO L225 Difference]: With dead ends: 57 [2020-12-23 01:13:29,879 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 01:13:29,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:13:29,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 01:13:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 24. [2020-12-23 01:13:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 01:13:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-23 01:13:29,886 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-12-23 01:13:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:29,886 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-23 01:13:29,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:13:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-23 01:13:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:13:29,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:29,888 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:30,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:30,102 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:30,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:30,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1303246583, now seen corresponding path program 3 times [2020-12-23 01:13:30,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:30,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362826110] [2020-12-23 01:13:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 01:13:30,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362826110] [2020-12-23 01:13:30,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061608284] [2020-12-23 01:13:30,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:30,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 01:13:30,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:30,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 01:13:30,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 01:13:30,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:30,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 01:13:30,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248162358] [2020-12-23 01:13:30,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:13:30,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:30,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:13:30,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:13:30,583 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-12-23 01:13:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:30,793 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-12-23 01:13:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:13:30,794 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-23 01:13:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:30,797 INFO L225 Difference]: With dead ends: 69 [2020-12-23 01:13:30,797 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 01:13:30,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:13:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 01:13:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 28. [2020-12-23 01:13:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 01:13:30,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 01:13:30,813 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-12-23 01:13:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:30,813 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 01:13:30,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:13:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 01:13:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 01:13:30,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:30,817 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:31,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:31,031 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:31,031 INFO L82 PathProgramCache]: Analyzing trace with hash -318070331, now seen corresponding path program 4 times [2020-12-23 01:13:31,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:31,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121886302] [2020-12-23 01:13:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 01:13:31,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121886302] [2020-12-23 01:13:31,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429902334] [2020-12-23 01:13:31,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:31,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:13:31,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:31,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:13:31,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 01:13:31,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:31,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 01:13:31,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360100105] [2020-12-23 01:13:31,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 01:13:31,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:31,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 01:13:31,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:13:31,569 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-12-23 01:13:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:31,797 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-12-23 01:13:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:13:31,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-23 01:13:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:31,803 INFO L225 Difference]: With dead ends: 81 [2020-12-23 01:13:31,803 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 01:13:31,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:13:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 01:13:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2020-12-23 01:13:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 01:13:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-23 01:13:31,821 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2020-12-23 01:13:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:31,821 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-23 01:13:31,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 01:13:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-23 01:13:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 01:13:31,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:31,823 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:32,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:32,039 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:32,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2015456385, now seen corresponding path program 5 times [2020-12-23 01:13:32,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:32,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715357091] [2020-12-23 01:13:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 01:13:32,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715357091] [2020-12-23 01:13:32,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088019872] [2020-12-23 01:13:32,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:33,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 01:13:33,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:33,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 01:13:33,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 01:13:33,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:33,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 01:13:33,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744931188] [2020-12-23 01:13:33,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:13:33,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:33,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:13:33,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:13:33,124 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-12-23 01:13:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:33,288 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-12-23 01:13:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:13:33,291 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-23 01:13:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:33,292 INFO L225 Difference]: With dead ends: 93 [2020-12-23 01:13:33,292 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 01:13:33,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:13:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 01:13:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 36. [2020-12-23 01:13:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 01:13:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-23 01:13:33,307 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2020-12-23 01:13:33,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:33,308 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-23 01:13:33,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:13:33,308 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-23 01:13:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 01:13:33,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:33,309 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:33,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 01:13:33,526 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:33,526 INFO L82 PathProgramCache]: Analyzing trace with hash -189699779, now seen corresponding path program 6 times [2020-12-23 01:13:33,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:33,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201804716] [2020-12-23 01:13:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 01:13:33,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201804716] [2020-12-23 01:13:33,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844788327] [2020-12-23 01:13:33,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:34,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 01:13:34,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:34,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:13:34,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 01:13:34,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:34,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 01:13:34,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595360893] [2020-12-23 01:13:34,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:13:34,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:34,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:13:34,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:13:34,364 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-12-23 01:13:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:34,501 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2020-12-23 01:13:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:13:34,502 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-12-23 01:13:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:34,506 INFO L225 Difference]: With dead ends: 105 [2020-12-23 01:13:34,506 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 01:13:34,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:13:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 01:13:34,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 40. [2020-12-23 01:13:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 01:13:34,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-23 01:13:34,522 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-12-23 01:13:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:34,522 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-23 01:13:34,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:13:34,523 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-23 01:13:34,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 01:13:34,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:34,527 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:34,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:34,743 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:34,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:34,744 INFO L82 PathProgramCache]: Analyzing trace with hash 760584185, now seen corresponding path program 7 times [2020-12-23 01:13:34,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:34,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451126996] [2020-12-23 01:13:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 01:13:34,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451126996] [2020-12-23 01:13:34,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123562453] [2020-12-23 01:13:34,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:35,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 01:13:35,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 01:13:35,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:35,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 01:13:35,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062915204] [2020-12-23 01:13:35,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:13:35,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:35,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:13:35,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:13:35,340 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2020-12-23 01:13:35,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:35,490 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2020-12-23 01:13:35,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:13:35,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-12-23 01:13:35,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:35,495 INFO L225 Difference]: With dead ends: 117 [2020-12-23 01:13:35,497 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 01:13:35,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:13:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 01:13:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 44. [2020-12-23 01:13:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 01:13:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-23 01:13:35,520 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-12-23 01:13:35,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:35,525 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-23 01:13:35,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:13:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-23 01:13:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 01:13:35,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:35,528 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:35,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:35,729 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:35,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:35,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1775699787, now seen corresponding path program 8 times [2020-12-23 01:13:35,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:35,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809727181] [2020-12-23 01:13:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 01:13:35,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809727181] [2020-12-23 01:13:35,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854264721] [2020-12-23 01:13:35,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:35,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:13:35,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:35,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 01:13:35,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 01:13:36,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:36,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 01:13:36,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193617555] [2020-12-23 01:13:36,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 01:13:36,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:36,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 01:13:36,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:13:36,035 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-12-23 01:13:36,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:36,228 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-12-23 01:13:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:13:36,231 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-12-23 01:13:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:36,233 INFO L225 Difference]: With dead ends: 129 [2020-12-23 01:13:36,233 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 01:13:36,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:13:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 01:13:36,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 48. [2020-12-23 01:13:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 01:13:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-23 01:13:36,252 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2020-12-23 01:13:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:36,253 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-23 01:13:36,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 01:13:36,253 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-23 01:13:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 01:13:36,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:36,258 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:36,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 01:13:36,459 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:36,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:36,459 INFO L82 PathProgramCache]: Analyzing trace with hash -859403407, now seen corresponding path program 9 times [2020-12-23 01:13:36,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:36,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620216785] [2020-12-23 01:13:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 01:13:36,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620216785] [2020-12-23 01:13:36,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204400876] [2020-12-23 01:13:36,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:39,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 01:13:39,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:39,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 01:13:39,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 01:13:39,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:39,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 01:13:39,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632652485] [2020-12-23 01:13:39,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:13:39,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:39,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:13:39,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:13:39,410 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 13 states. [2020-12-23 01:13:39,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:39,563 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2020-12-23 01:13:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:13:39,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-12-23 01:13:39,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:39,564 INFO L225 Difference]: With dead ends: 141 [2020-12-23 01:13:39,564 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 01:13:39,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:13:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 01:13:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 52. [2020-12-23 01:13:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 01:13:39,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-12-23 01:13:39,570 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-12-23 01:13:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:39,571 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-12-23 01:13:39,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:13:39,571 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-12-23 01:13:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:13:39,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:39,572 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:39,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:39,786 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:39,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash 407457837, now seen corresponding path program 10 times [2020-12-23 01:13:39,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:39,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282228252] [2020-12-23 01:13:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 01:13:39,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282228252] [2020-12-23 01:13:39,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824196077] [2020-12-23 01:13:39,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:40,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:13:40,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:40,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:13:40,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 01:13:40,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:40,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 01:13:40,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323922067] [2020-12-23 01:13:40,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 01:13:40,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:40,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 01:13:40,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:13:40,255 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 14 states. [2020-12-23 01:13:40,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:40,467 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2020-12-23 01:13:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 01:13:40,468 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-23 01:13:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:40,470 INFO L225 Difference]: With dead ends: 153 [2020-12-23 01:13:40,470 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 01:13:40,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:13:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 01:13:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 56. [2020-12-23 01:13:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 01:13:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-23 01:13:40,493 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2020-12-23 01:13:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:40,494 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-23 01:13:40,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 01:13:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-23 01:13:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 01:13:40,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:40,497 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:40,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:40,712 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:40,713 INFO L82 PathProgramCache]: Analyzing trace with hash -380877079, now seen corresponding path program 11 times [2020-12-23 01:13:40,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:40,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652519195] [2020-12-23 01:13:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 01:13:40,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652519195] [2020-12-23 01:13:40,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317820550] [2020-12-23 01:13:40,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:38,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 01:14:38,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:14:38,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 01:14:38,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:14:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 01:14:38,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:14:38,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 01:14:38,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544099889] [2020-12-23 01:14:38,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 01:14:38,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:14:38,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 01:14:38,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:14:38,940 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 15 states. [2020-12-23 01:14:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:14:39,114 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2020-12-23 01:14:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:14:39,115 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-12-23 01:14:39,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:14:39,120 INFO L225 Difference]: With dead ends: 165 [2020-12-23 01:14:39,121 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 01:14:39,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:14:39,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 01:14:39,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 60. [2020-12-23 01:14:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 01:14:39,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-23 01:14:39,134 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2020-12-23 01:14:39,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:14:39,134 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-23 01:14:39,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:14:39,135 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-23 01:14:39,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 01:14:39,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:14:39,136 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:14:39,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 01:14:39,351 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:14:39,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:14:39,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1508536229, now seen corresponding path program 12 times [2020-12-23 01:14:39,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:14:39,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045538780] [2020-12-23 01:14:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:14:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 01:14:39,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045538780] [2020-12-23 01:14:39,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831630352] [2020-12-23 01:14:39,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:47,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 01:14:47,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:14:47,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:14:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:14:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 01:14:47,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:14:47,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 01:14:47,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777187081] [2020-12-23 01:14:47,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:14:47,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:14:47,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:14:47,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:14:47,885 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 16 states. [2020-12-23 01:14:48,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:14:48,071 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2020-12-23 01:14:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:14:48,071 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-12-23 01:14:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:14:48,072 INFO L225 Difference]: With dead ends: 177 [2020-12-23 01:14:48,072 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 01:14:48,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:14:48,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 01:14:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 64. [2020-12-23 01:14:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 01:14:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-23 01:14:48,078 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-12-23 01:14:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:14:48,078 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-23 01:14:48,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:14:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-23 01:14:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 01:14:48,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:14:48,079 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:14:48,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 01:14:48,294 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:14:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:14:48,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1380005279, now seen corresponding path program 13 times [2020-12-23 01:14:48,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:14:48,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684280681] [2020-12-23 01:14:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:14:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 01:14:48,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684280681] [2020-12-23 01:14:48,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799503160] [2020-12-23 01:14:48,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:48,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 01:14:48,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:14:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 01:14:48,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:14:48,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 01:14:48,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939139472] [2020-12-23 01:14:48,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 01:14:48,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:14:48,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 01:14:48,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:14:48,693 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-12-23 01:14:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:14:48,946 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2020-12-23 01:14:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:14:48,947 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-12-23 01:14:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:14:48,948 INFO L225 Difference]: With dead ends: 189 [2020-12-23 01:14:48,948 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 01:14:48,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:14:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 01:14:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 68. [2020-12-23 01:14:48,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 01:14:48,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-12-23 01:14:48,955 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-12-23 01:14:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:14:48,956 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-12-23 01:14:48,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 01:14:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-12-23 01:14:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 01:14:48,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:14:48,957 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:14:49,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 01:14:49,168 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:14:49,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:14:49,169 INFO L82 PathProgramCache]: Analyzing trace with hash -773564643, now seen corresponding path program 14 times [2020-12-23 01:14:49,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:14:49,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878982301] [2020-12-23 01:14:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:14:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 01:14:49,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878982301] [2020-12-23 01:14:49,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700794371] [2020-12-23 01:14:49,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:49,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:14:49,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:14:49,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:14:49,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:14:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 01:14:49,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:14:49,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 01:14:49,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529756649] [2020-12-23 01:14:49,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 01:14:49,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:14:49,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 01:14:49,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:14:49,596 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 18 states. [2020-12-23 01:14:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:14:49,838 INFO L93 Difference]: Finished difference Result 201 states and 206 transitions. [2020-12-23 01:14:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:14:49,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-12-23 01:14:49,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:14:49,840 INFO L225 Difference]: With dead ends: 201 [2020-12-23 01:14:49,840 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 01:14:49,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:14:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 01:14:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 72. [2020-12-23 01:14:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 01:14:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-23 01:14:49,845 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2020-12-23 01:14:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:14:49,846 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-23 01:14:49,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 01:14:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-23 01:14:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 01:14:49,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:14:49,847 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:14:50,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:14:50,061 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:14:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:14:50,061 INFO L82 PathProgramCache]: Analyzing trace with hash -587852327, now seen corresponding path program 15 times [2020-12-23 01:14:50,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:14:50,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405362002] [2020-12-23 01:14:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:14:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:14:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 01:14:50,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405362002] [2020-12-23 01:14:50,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969501222] [2020-12-23 01:14:50,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:15:05,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 01:15:05,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:15:05,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 01:15:05,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:15:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 01:15:05,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:15:05,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 01:15:05,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561732135] [2020-12-23 01:15:05,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:15:05,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:15:05,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:15:05,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:15:05,459 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 19 states. [2020-12-23 01:15:05,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:15:05,711 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2020-12-23 01:15:05,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:15:05,712 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2020-12-23 01:15:05,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:15:05,713 INFO L225 Difference]: With dead ends: 213 [2020-12-23 01:15:05,713 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 01:15:05,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:15:05,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 01:15:05,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 76. [2020-12-23 01:15:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 01:15:05,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-12-23 01:15:05,719 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2020-12-23 01:15:05,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:15:05,720 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-12-23 01:15:05,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:15:05,720 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-12-23 01:15:05,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 01:15:05,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:15:05,721 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:15:05,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 01:15:05,935 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:15:05,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:15:05,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1894840683, now seen corresponding path program 16 times [2020-12-23 01:15:05,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:15:05,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036340489] [2020-12-23 01:15:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:15:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:15:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 01:15:06,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036340489] [2020-12-23 01:15:06,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748837911] [2020-12-23 01:15:06,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:15:06,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:15:06,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:15:06,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:15:06,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:15:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 01:15:06,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:15:06,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 01:15:06,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891385758] [2020-12-23 01:15:06,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 01:15:06,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:15:06,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 01:15:06,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:15:06,394 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 20 states. [2020-12-23 01:15:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:15:06,615 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2020-12-23 01:15:06,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 01:15:06,616 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2020-12-23 01:15:06,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:15:06,618 INFO L225 Difference]: With dead ends: 225 [2020-12-23 01:15:06,618 INFO L226 Difference]: Without dead ends: 184 [2020-12-23 01:15:06,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:15:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-23 01:15:06,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 80. [2020-12-23 01:15:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 01:15:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-23 01:15:06,624 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-12-23 01:15:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:15:06,624 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-23 01:15:06,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 01:15:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-23 01:15:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 01:15:06,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:15:06,625 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:15:06,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 01:15:06,837 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:15:06,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:15:06,838 INFO L82 PathProgramCache]: Analyzing trace with hash -775280303, now seen corresponding path program 17 times [2020-12-23 01:15:06,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:15:06,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438212621] [2020-12-23 01:15:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:15:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:15:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-23 01:15:07,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438212621] [2020-12-23 01:15:07,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494548695] [2020-12-23 01:15:07,104 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