/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/single_elem_safe.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:12:20,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:12:20,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:12:20,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:12:20,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:12:20,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:12:20,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:12:20,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:12:20,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:12:20,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:12:20,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:12:20,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:12:20,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:12:20,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:12:20,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:12:20,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:12:20,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:12:20,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:12:20,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:12:20,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:12:20,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:12:20,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:12:20,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:12:20,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:12:20,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:12:20,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:12:20,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:12:20,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:12:20,659 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 01:12:20,693 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:12:20,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:12:20,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:12:20,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:12:20,697 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:12:20,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:12:20,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:12:20,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:12:20,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:12:20,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:12:20,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:12:20,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:12:20,699 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:12:20,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:12:20,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:12:20,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:12:20,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:12:20,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:12:20,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:12:20,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:12:20,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:12:20,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:12:20,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:12:20,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:12:20,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:12:20,702 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:12:21,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:12:21,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:12:21,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:12:21,200 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:12:21,201 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:12:21,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/single_elem_safe.i [2020-12-23 01:12:21,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1fd1e1bc1/ccea49ef1b704d37a0c16d76aa04e883/FLAG5d4c6f74f [2020-12-23 01:12:22,292 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:12:22,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/single_elem_safe.i [2020-12-23 01:12:22,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1fd1e1bc1/ccea49ef1b704d37a0c16d76aa04e883/FLAG5d4c6f74f [2020-12-23 01:12:22,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1fd1e1bc1/ccea49ef1b704d37a0c16d76aa04e883 [2020-12-23 01:12:22,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:12:22,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:12:22,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:12:22,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:12:22,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:12:22,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:12:22" (1/1) ... [2020-12-23 01:12:22,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476b1c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:22, skipping insertion in model container [2020-12-23 01:12:22,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:12:22" (1/1) ... [2020-12-23 01:12:22,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:12:22,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:12:22,815 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/single_elem_safe.i[809,822] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~s~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],StructAccessExpression[IdentifierExpression[~s~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],StructAccessExpression[IdentifierExpression[~s~0,],offset]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IntegerLiteral[3]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 01:12:22,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:12:22,924 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:12:22,952 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/single_elem_safe.i[809,822] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~s~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],StructAccessExpression[IdentifierExpression[~s~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],StructAccessExpression[IdentifierExpression[~s~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[24],StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 01:12:23,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:12:23,058 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:12:23,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:23 WrapperNode [2020-12-23 01:12:23,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:12:23,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:12:23,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:12:23,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:12:23,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:23" (1/1) ... [2020-12-23 01:12:23,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:23" (1/1) ... [2020-12-23 01:12:23,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:12:23,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:12:23,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:12:23,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:12:23,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:23" (1/1) ... [2020-12-23 01:12:23,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:23" (1/1) ... [2020-12-23 01:12:23,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:23" (1/1) ... [2020-12-23 01:12:23,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:23" (1/1) ... [2020-12-23 01:12:23,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:23" (1/1) ... [2020-12-23 01:12:23,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:23" (1/1) ... [2020-12-23 01:12:23,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:23" (1/1) ... [2020-12-23 01:12:23,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:12:23,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:12:23,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:12:23,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:12:23,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:23" (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 01:12:23,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-23 01:12:23,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:12:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-23 01:12:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:12:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:12:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 01:12:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:12:23,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:12:23,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:12:24,015 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:12:24,016 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 01:12:24,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:12:24 BoogieIcfgContainer [2020-12-23 01:12:24,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:12:24,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:12:24,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:12:24,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:12:24,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:12:22" (1/3) ... [2020-12-23 01:12:24,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba7f9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:12:24, skipping insertion in model container [2020-12-23 01:12:24,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:12:23" (2/3) ... [2020-12-23 01:12:24,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba7f9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:12:24, skipping insertion in model container [2020-12-23 01:12:24,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:12:24" (3/3) ... [2020-12-23 01:12:24,031 INFO L111 eAbstractionObserver]: Analyzing ICFG single_elem_safe.i [2020-12-23 01:12:24,041 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:12:24,050 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:12:24,080 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:12:24,117 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:12:24,117 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:12:24,118 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:12:24,118 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:12:24,118 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:12:24,118 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:12:24,118 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:12:24,118 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:12:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 01:12:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 01:12:24,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:24,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:24,150 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:24,161 INFO L82 PathProgramCache]: Analyzing trace with hash -739796340, now seen corresponding path program 1 times [2020-12-23 01:12:24,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:24,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377438070] [2020-12-23 01:12:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:24,397 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 01:12:24,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377438070] [2020-12-23 01:12:24,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:12:24,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:12:24,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163737922] [2020-12-23 01:12:24,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:12:24,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:24,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:12:24,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:12:24,433 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 01:12:24,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:24,461 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2020-12-23 01:12:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:12:24,463 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 01:12:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:24,475 INFO L225 Difference]: With dead ends: 34 [2020-12-23 01:12:24,476 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 01:12:24,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:12:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 01:12:24,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 01:12:24,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 01:12:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2020-12-23 01:12:24,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 9 [2020-12-23 01:12:24,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:24,521 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2020-12-23 01:12:24,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:12:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2020-12-23 01:12:24,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 01:12:24,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:24,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:24,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:12:24,523 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:24,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:24,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1452551885, now seen corresponding path program 1 times [2020-12-23 01:12:24,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:24,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388421045] [2020-12-23 01:12:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:24,611 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 01:12:24,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388421045] [2020-12-23 01:12:24,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:12:24,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:12:24,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326492314] [2020-12-23 01:12:24,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:12:24,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:24,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:12:24,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:12:24,618 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand 3 states. [2020-12-23 01:12:24,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:24,693 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-12-23 01:12:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:12:24,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 01:12:24,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:24,699 INFO L225 Difference]: With dead ends: 40 [2020-12-23 01:12:24,700 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 01:12:24,702 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 01:12:24,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 01:12:24,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 18. [2020-12-23 01:12:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 01:12:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2020-12-23 01:12:24,716 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 9 [2020-12-23 01:12:24,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:24,716 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2020-12-23 01:12:24,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:12:24,718 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2020-12-23 01:12:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 01:12:24,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:24,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:24,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 01:12:24,724 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:24,728 INFO L82 PathProgramCache]: Analyzing trace with hash 479393663, now seen corresponding path program 1 times [2020-12-23 01:12:24,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:24,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355831941] [2020-12-23 01:12:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:24,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355831941] [2020-12-23 01:12:24,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:12:24,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:12:24,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944247172] [2020-12-23 01:12:24,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:12:24,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:24,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:12:24,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:12:24,853 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand 3 states. [2020-12-23 01:12:24,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:24,898 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2020-12-23 01:12:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:12:24,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-23 01:12:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:24,902 INFO L225 Difference]: With dead ends: 47 [2020-12-23 01:12:24,903 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 01:12:24,907 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 01:12:24,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 01:12:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 19. [2020-12-23 01:12:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 01:12:24,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2020-12-23 01:12:24,920 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 14 [2020-12-23 01:12:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:24,920 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-12-23 01:12:24,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:12:24,921 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-12-23 01:12:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 01:12:24,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:24,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:24,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 01:12:24,924 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:24,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1180458241, now seen corresponding path program 1 times [2020-12-23 01:12:24,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:24,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368490346] [2020-12-23 01:12:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:25,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368490346] [2020-12-23 01:12:25,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165320091] [2020-12-23 01:12:25,086 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 01:12:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:25,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 01:12:25,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:12:25,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:12:25,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 01:12:25,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967560568] [2020-12-23 01:12:25,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:12:25,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:25,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:12:25,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:12:25,201 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 3 states. [2020-12-23 01:12:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:25,217 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2020-12-23 01:12:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:12:25,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-23 01:12:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:25,219 INFO L225 Difference]: With dead ends: 28 [2020-12-23 01:12:25,219 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 01:12:25,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:12:25,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 01:12:25,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 01:12:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 01:12:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-12-23 01:12:25,225 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 14 [2020-12-23 01:12:25,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:25,226 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-12-23 01:12:25,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:12:25,226 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2020-12-23 01:12:25,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 01:12:25,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:25,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:25,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:25,442 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1180398659, now seen corresponding path program 1 times [2020-12-23 01:12:25,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:25,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965415758] [2020-12-23 01:12:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:25,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965415758] [2020-12-23 01:12:25,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725399082] [2020-12-23 01:12:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:25,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 01:12:25,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:25,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:25,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 01:12:25,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555870991] [2020-12-23 01:12:25,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:12:25,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:25,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:12:25,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:12:25,749 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 5 states. [2020-12-23 01:12:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:25,808 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2020-12-23 01:12:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:12:25,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 01:12:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:25,810 INFO L225 Difference]: With dead ends: 61 [2020-12-23 01:12:25,811 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 01:12:25,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:12:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 01:12:25,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 27. [2020-12-23 01:12:25,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 01:12:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-12-23 01:12:25,820 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 14 [2020-12-23 01:12:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:25,821 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-12-23 01:12:25,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:12:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-12-23 01:12:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 01:12:25,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:25,823 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:26,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:26,037 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:26,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:26,039 INFO L82 PathProgramCache]: Analyzing trace with hash -795862731, now seen corresponding path program 2 times [2020-12-23 01:12:26,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:26,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851169039] [2020-12-23 01:12:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:26,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851169039] [2020-12-23 01:12:26,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249424605] [2020-12-23 01:12:26,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:26,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:26,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:26,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 01:12:26,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:26,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:26,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 01:12:26,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299636102] [2020-12-23 01:12:26,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:12:26,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:26,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:12:26,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:12:26,269 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 6 states. [2020-12-23 01:12:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:26,331 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2020-12-23 01:12:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 01:12:26,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-23 01:12:26,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:26,333 INFO L225 Difference]: With dead ends: 77 [2020-12-23 01:12:26,333 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 01:12:26,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 01:12:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 01:12:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2020-12-23 01:12:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 01:12:26,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2020-12-23 01:12:26,343 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 19 [2020-12-23 01:12:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:26,344 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2020-12-23 01:12:26,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:12:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2020-12-23 01:12:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 01:12:26,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:26,345 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:26,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:26,560 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:26,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:26,562 INFO L82 PathProgramCache]: Analyzing trace with hash -23676029, now seen corresponding path program 3 times [2020-12-23 01:12:26,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:26,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523645088] [2020-12-23 01:12:26,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:26,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523645088] [2020-12-23 01:12:26,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844536242] [2020-12-23 01:12:26,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:26,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 01:12:26,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:26,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 01:12:26,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:26,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:26,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 01:12:26,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737865209] [2020-12-23 01:12:26,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:12:26,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:26,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:12:26,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:12:26,815 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 7 states. [2020-12-23 01:12:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:26,898 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2020-12-23 01:12:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:12:26,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-23 01:12:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:26,905 INFO L225 Difference]: With dead ends: 93 [2020-12-23 01:12:26,906 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 01:12:26,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 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 01:12:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 01:12:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 41. [2020-12-23 01:12:26,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 01:12:26,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 56 transitions. [2020-12-23 01:12:26,933 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 56 transitions. Word has length 24 [2020-12-23 01:12:26,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:26,933 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 56 transitions. [2020-12-23 01:12:26,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:12:26,934 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 56 transitions. [2020-12-23 01:12:26,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 01:12:26,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:26,935 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:27,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:27,136 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:27,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:27,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1702929931, now seen corresponding path program 4 times [2020-12-23 01:12:27,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:27,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663068452] [2020-12-23 01:12:27,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:27,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663068452] [2020-12-23 01:12:27,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427951273] [2020-12-23 01:12:27,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:27,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:27,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:27,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:12:27,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:27,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:27,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 01:12:27,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486593087] [2020-12-23 01:12:27,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 01:12:27,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:27,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 01:12:27,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:12:27,494 INFO L87 Difference]: Start difference. First operand 41 states and 56 transitions. Second operand 8 states. [2020-12-23 01:12:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:27,567 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2020-12-23 01:12:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:12:27,568 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-12-23 01:12:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:27,570 INFO L225 Difference]: With dead ends: 109 [2020-12-23 01:12:27,570 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 01:12:27,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 01:12:27,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 01:12:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 48. [2020-12-23 01:12:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 01:12:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2020-12-23 01:12:27,579 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 29 [2020-12-23 01:12:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:27,579 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2020-12-23 01:12:27,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 01:12:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2020-12-23 01:12:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 01:12:27,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:27,581 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:27,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:27,795 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:27,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1882066237, now seen corresponding path program 5 times [2020-12-23 01:12:27,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:27,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346705834] [2020-12-23 01:12:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:27,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346705834] [2020-12-23 01:12:27,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422509182] [2020-12-23 01:12:27,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:12:28,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 01:12:28,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:28,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 01:12:28,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:28,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:28,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 01:12:28,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639243100] [2020-12-23 01:12:28,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:12:28,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:28,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:12:28,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:12:28,267 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand 9 states. [2020-12-23 01:12:28,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:28,361 INFO L93 Difference]: Finished difference Result 125 states and 164 transitions. [2020-12-23 01:12:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:12:28,362 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-12-23 01:12:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:28,363 INFO L225 Difference]: With dead ends: 125 [2020-12-23 01:12:28,364 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 01:12:28,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 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 01:12:28,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 01:12:28,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 55. [2020-12-23 01:12:28,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 01:12:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2020-12-23 01:12:28,372 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 34 [2020-12-23 01:12:28,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:28,373 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2020-12-23 01:12:28,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:12:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2020-12-23 01:12:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 01:12:28,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:28,374 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:28,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:28,591 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:28,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:28,593 INFO L82 PathProgramCache]: Analyzing trace with hash -572216651, now seen corresponding path program 6 times [2020-12-23 01:12:28,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:28,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227216053] [2020-12-23 01:12:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:28,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227216053] [2020-12-23 01:12:28,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367088976] [2020-12-23 01:12:28,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:29,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 01:12:29,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:12:29,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:29,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:29,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 01:12:29,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075883145] [2020-12-23 01:12:29,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:12:29,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:29,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:12:29,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:12:29,377 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand 10 states. [2020-12-23 01:12:29,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:29,513 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2020-12-23 01:12:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:12:29,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-12-23 01:12:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:29,515 INFO L225 Difference]: With dead ends: 141 [2020-12-23 01:12:29,515 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 01:12:29,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 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 01:12:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 01:12:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 62. [2020-12-23 01:12:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 01:12:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-12-23 01:12:29,533 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 39 [2020-12-23 01:12:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:29,534 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-12-23 01:12:29,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:12:29,535 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-12-23 01:12:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 01:12:29,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:29,540 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:29,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 01:12:29,755 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:29,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:29,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1860246019, now seen corresponding path program 7 times [2020-12-23 01:12:29,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:29,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869831471] [2020-12-23 01:12:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:29,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869831471] [2020-12-23 01:12:29,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442604371] [2020-12-23 01:12:29,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 01:12:30,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:30,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:30,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 01:12:30,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586760114] [2020-12-23 01:12:30,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:12:30,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:30,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:12:30,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:12:30,175 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 11 states. [2020-12-23 01:12:30,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:30,289 INFO L93 Difference]: Finished difference Result 157 states and 206 transitions. [2020-12-23 01:12:30,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:12:30,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-12-23 01:12:30,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:30,292 INFO L225 Difference]: With dead ends: 157 [2020-12-23 01:12:30,292 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 01:12:30,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 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 01:12:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 01:12:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 69. [2020-12-23 01:12:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 01:12:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 96 transitions. [2020-12-23 01:12:30,300 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 96 transitions. Word has length 44 [2020-12-23 01:12:30,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:30,300 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 96 transitions. [2020-12-23 01:12:30,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:12:30,301 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 96 transitions. [2020-12-23 01:12:30,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:12:30,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:30,302 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:30,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 01:12:30,516 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:30,517 INFO L82 PathProgramCache]: Analyzing trace with hash 174852981, now seen corresponding path program 8 times [2020-12-23 01:12:30,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:30,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740897211] [2020-12-23 01:12:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:30,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740897211] [2020-12-23 01:12:30,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353708450] [2020-12-23 01:12:30,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:30,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:30,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:30,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 01:12:30,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:30,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:30,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 01:12:30,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230459841] [2020-12-23 01:12:30,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 01:12:30,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:30,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 01:12:30,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:12:30,859 INFO L87 Difference]: Start difference. First operand 69 states and 96 transitions. Second operand 12 states. [2020-12-23 01:12:31,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:31,000 INFO L93 Difference]: Finished difference Result 173 states and 227 transitions. [2020-12-23 01:12:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:12:31,001 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-12-23 01:12:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:31,004 INFO L225 Difference]: With dead ends: 173 [2020-12-23 01:12:31,004 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 01:12:31,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 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 01:12:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 01:12:31,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 76. [2020-12-23 01:12:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 01:12:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-12-23 01:12:31,011 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 49 [2020-12-23 01:12:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:31,012 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-12-23 01:12:31,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 01:12:31,013 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-12-23 01:12:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 01:12:31,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:31,014 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:31,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:31,230 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:31,231 INFO L82 PathProgramCache]: Analyzing trace with hash 395850051, now seen corresponding path program 9 times [2020-12-23 01:12:31,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:31,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596705294] [2020-12-23 01:12:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:31,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596705294] [2020-12-23 01:12:31,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647659836] [2020-12-23 01:12:31,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:32,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 01:12:32,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:32,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 01:12:32,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:32,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:32,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 01:12:32,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130172631] [2020-12-23 01:12:32,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:12:32,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:32,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:12:32,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:12:32,394 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 13 states. [2020-12-23 01:12:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:32,623 INFO L93 Difference]: Finished difference Result 189 states and 248 transitions. [2020-12-23 01:12:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:12:32,624 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-12-23 01:12:32,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:32,626 INFO L225 Difference]: With dead ends: 189 [2020-12-23 01:12:32,626 INFO L226 Difference]: Without dead ends: 179 [2020-12-23 01:12:32,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:12:32,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-23 01:12:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 83. [2020-12-23 01:12:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 01:12:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 116 transitions. [2020-12-23 01:12:32,641 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 116 transitions. Word has length 54 [2020-12-23 01:12:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:32,641 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 116 transitions. [2020-12-23 01:12:32,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:12:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 116 transitions. [2020-12-23 01:12:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 01:12:32,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:32,643 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:32,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:32,859 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:32,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:32,860 INFO L82 PathProgramCache]: Analyzing trace with hash -389972939, now seen corresponding path program 10 times [2020-12-23 01:12:32,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:32,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527147110] [2020-12-23 01:12:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:33,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527147110] [2020-12-23 01:12:33,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808331791] [2020-12-23 01:12:33,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:33,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:33,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:33,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:12:33,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:33,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:33,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 01:12:33,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98272426] [2020-12-23 01:12:33,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 01:12:33,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:33,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 01:12:33,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:12:33,629 INFO L87 Difference]: Start difference. First operand 83 states and 116 transitions. Second operand 14 states. [2020-12-23 01:12:33,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:33,803 INFO L93 Difference]: Finished difference Result 205 states and 269 transitions. [2020-12-23 01:12:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 01:12:33,804 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-12-23 01:12:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:33,806 INFO L225 Difference]: With dead ends: 205 [2020-12-23 01:12:33,806 INFO L226 Difference]: Without dead ends: 195 [2020-12-23 01:12:33,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 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 01:12:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-23 01:12:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 90. [2020-12-23 01:12:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 01:12:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-12-23 01:12:33,814 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-12-23 01:12:33,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:33,815 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-12-23 01:12:33,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 01:12:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-12-23 01:12:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 01:12:33,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:33,817 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:34,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 01:12:34,027 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:34,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1288386691, now seen corresponding path program 11 times [2020-12-23 01:12:34,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:34,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109316988] [2020-12-23 01:12:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:34,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109316988] [2020-12-23 01:12:34,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637027234] [2020-12-23 01:12:34,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:34,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 01:12:34,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:34,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 01:12:34,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:34,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:34,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 01:12:34,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031312001] [2020-12-23 01:12:34,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 01:12:34,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:34,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 01:12:34,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:12:34,827 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 15 states. [2020-12-23 01:12:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:35,012 INFO L93 Difference]: Finished difference Result 221 states and 290 transitions. [2020-12-23 01:12:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:12:35,013 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-12-23 01:12:35,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:35,015 INFO L225 Difference]: With dead ends: 221 [2020-12-23 01:12:35,016 INFO L226 Difference]: Without dead ends: 211 [2020-12-23 01:12:35,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 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 01:12:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-23 01:12:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 97. [2020-12-23 01:12:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 01:12:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2020-12-23 01:12:35,024 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 64 [2020-12-23 01:12:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:35,025 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2020-12-23 01:12:35,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:12:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2020-12-23 01:12:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 01:12:35,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:35,027 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:35,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 01:12:35,241 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:35,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:35,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1519451381, now seen corresponding path program 12 times [2020-12-23 01:12:35,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:35,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142377187] [2020-12-23 01:12:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:35,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142377187] [2020-12-23 01:12:35,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949436872] [2020-12-23 01:12:35,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:39,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 01:12:39,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:39,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:12:39,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:39,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:39,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 01:12:39,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876502001] [2020-12-23 01:12:39,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:12:39,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:39,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:12:39,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:12:39,570 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand 16 states. [2020-12-23 01:12:39,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:39,756 INFO L93 Difference]: Finished difference Result 237 states and 311 transitions. [2020-12-23 01:12:39,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:12:39,756 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-12-23 01:12:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:39,758 INFO L225 Difference]: With dead ends: 237 [2020-12-23 01:12:39,758 INFO L226 Difference]: Without dead ends: 227 [2020-12-23 01:12:39,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 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 01:12:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-23 01:12:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 104. [2020-12-23 01:12:39,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 01:12:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 146 transitions. [2020-12-23 01:12:39,771 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 146 transitions. Word has length 69 [2020-12-23 01:12:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:39,773 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 146 transitions. [2020-12-23 01:12:39,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:12:39,773 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 146 transitions. [2020-12-23 01:12:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 01:12:39,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:39,777 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:39,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 01:12:39,979 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:39,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1481519043, now seen corresponding path program 13 times [2020-12-23 01:12:39,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:39,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139200951] [2020-12-23 01:12:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:40,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139200951] [2020-12-23 01:12:40,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466438932] [2020-12-23 01:12:40,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:40,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 01:12:40,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:40,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:40,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 01:12:40,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123321628] [2020-12-23 01:12:40,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 01:12:40,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:40,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 01:12:40,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:12:40,429 INFO L87 Difference]: Start difference. First operand 104 states and 146 transitions. Second operand 17 states. [2020-12-23 01:12:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:40,623 INFO L93 Difference]: Finished difference Result 253 states and 332 transitions. [2020-12-23 01:12:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:12:40,624 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2020-12-23 01:12:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:40,626 INFO L225 Difference]: With dead ends: 253 [2020-12-23 01:12:40,626 INFO L226 Difference]: Without dead ends: 243 [2020-12-23 01:12:40,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 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 01:12:40,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-23 01:12:40,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 111. [2020-12-23 01:12:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 01:12:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 156 transitions. [2020-12-23 01:12:40,634 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 156 transitions. Word has length 74 [2020-12-23 01:12:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:40,634 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 156 transitions. [2020-12-23 01:12:40,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 01:12:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 156 transitions. [2020-12-23 01:12:40,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 01:12:40,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:40,636 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:40,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:40,851 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:40,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:40,852 INFO L82 PathProgramCache]: Analyzing trace with hash 445025717, now seen corresponding path program 14 times [2020-12-23 01:12:40,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:40,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530059372] [2020-12-23 01:12:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:41,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530059372] [2020-12-23 01:12:41,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488289330] [2020-12-23 01:12:41,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:41,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:12:41,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:41,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:12:41,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:41,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:41,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 01:12:41,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330152041] [2020-12-23 01:12:41,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 01:12:41,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:41,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 01:12:41,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:12:41,356 INFO L87 Difference]: Start difference. First operand 111 states and 156 transitions. Second operand 18 states. [2020-12-23 01:12:41,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:41,556 INFO L93 Difference]: Finished difference Result 269 states and 353 transitions. [2020-12-23 01:12:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:12:41,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-12-23 01:12:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:41,559 INFO L225 Difference]: With dead ends: 269 [2020-12-23 01:12:41,559 INFO L226 Difference]: Without dead ends: 259 [2020-12-23 01:12:41,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 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 01:12:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-23 01:12:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 118. [2020-12-23 01:12:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 01:12:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2020-12-23 01:12:41,567 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 79 [2020-12-23 01:12:41,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:41,567 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2020-12-23 01:12:41,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 01:12:41,567 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2020-12-23 01:12:41,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 01:12:41,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:41,569 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:41,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 01:12:41,781 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:41,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:41,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1257576195, now seen corresponding path program 15 times [2020-12-23 01:12:41,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:41,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414208281] [2020-12-23 01:12:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:42,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414208281] [2020-12-23 01:12:42,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324757921] [2020-12-23 01:12:42,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:57,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 01:12:57,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 01:12:57,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:57,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:57,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 01:12:57,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694247595] [2020-12-23 01:12:57,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:12:57,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:57,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:12:57,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:12:57,597 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand 19 states. [2020-12-23 01:12:57,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:57,843 INFO L93 Difference]: Finished difference Result 285 states and 374 transitions. [2020-12-23 01:12:57,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:12:57,844 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 84 [2020-12-23 01:12:57,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:57,845 INFO L225 Difference]: With dead ends: 285 [2020-12-23 01:12:57,845 INFO L226 Difference]: Without dead ends: 275 [2020-12-23 01:12:57,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 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 01:12:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-23 01:12:57,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 125. [2020-12-23 01:12:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 01:12:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 176 transitions. [2020-12-23 01:12:57,856 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 176 transitions. Word has length 84 [2020-12-23 01:12:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:57,857 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 176 transitions. [2020-12-23 01:12:57,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:12:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 176 transitions. [2020-12-23 01:12:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 01:12:57,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:57,858 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:58,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:58,073 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:58,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2085498485, now seen corresponding path program 16 times [2020-12-23 01:12:58,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:58,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219660531] [2020-12-23 01:12:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:58,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219660531] [2020-12-23 01:12:58,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681224117] [2020-12-23 01:12:58,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:59,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:59,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:59,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:12:59,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:59,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:59,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 01:12:59,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49935920] [2020-12-23 01:12:59,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 01:12:59,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:59,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 01:12:59,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:12:59,428 INFO L87 Difference]: Start difference. First operand 125 states and 176 transitions. Second operand 20 states. [2020-12-23 01:12:59,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:59,687 INFO L93 Difference]: Finished difference Result 301 states and 395 transitions. [2020-12-23 01:12:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 01:12:59,688 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-12-23 01:12:59,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:59,689 INFO L225 Difference]: With dead ends: 301 [2020-12-23 01:12:59,690 INFO L226 Difference]: Without dead ends: 291 [2020-12-23 01:12:59,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:12:59,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-23 01:12:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 132. [2020-12-23 01:12:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 01:12:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 186 transitions. [2020-12-23 01:12:59,697 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 186 transitions. Word has length 89 [2020-12-23 01:12:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:59,697 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 186 transitions. [2020-12-23 01:12:59,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 01:12:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 186 transitions. [2020-12-23 01:12:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 01:12:59,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:59,698 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:59,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:59,913 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1016327747, now seen corresponding path program 17 times [2020-12-23 01:12:59,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:59,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193040933] [2020-12-23 01:12:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:00,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193040933] [2020-12-23 01:13:00,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019491608] [2020-12-23 01:13:00,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:13:58,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 01:13:58,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:58,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 01:13:58,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:59,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:59,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 01:13:59,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774936774] [2020-12-23 01:13:59,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 01:13:59,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:59,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 01:13:59,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:13:59,119 INFO L87 Difference]: Start difference. First operand 132 states and 186 transitions. Second operand 21 states. [2020-12-23 01:13:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:59,345 INFO L93 Difference]: Finished difference Result 317 states and 416 transitions. [2020-12-23 01:13:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 01:13:59,345 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2020-12-23 01:13:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:59,347 INFO L225 Difference]: With dead ends: 317 [2020-12-23 01:13:59,347 INFO L226 Difference]: Without dead ends: 307 [2020-12-23 01:13:59,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:13:59,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-23 01:13:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 139. [2020-12-23 01:13:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 01:13:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 196 transitions. [2020-12-23 01:13:59,353 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 196 transitions. Word has length 94 [2020-12-23 01:13:59,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:59,354 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 196 transitions. [2020-12-23 01:13:59,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 01:13:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 196 transitions. [2020-12-23 01:13:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 01:13:59,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:59,355 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:59,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 01:13:59,556 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:59,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:59,557 INFO L82 PathProgramCache]: Analyzing trace with hash 747888437, now seen corresponding path program 18 times [2020-12-23 01:13:59,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:59,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996203115] [2020-12-23 01:13:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:59,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996203115] [2020-12-23 01:13:59,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133079194] [2020-12-23 01:13:59,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true