/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-examples/standard_running-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:57:01,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:57:01,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:57:01,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:57:01,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:57:01,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:57:01,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:57:01,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:57:01,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:57:01,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:57:01,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:57:01,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:57:01,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:57:01,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:57:01,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:57:01,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:57:01,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:57:01,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:57:01,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:57:01,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:57:01,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:57:01,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:57:01,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:57:01,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:57:01,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:57:01,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:57:01,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:57:01,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:57:01,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:57:01,839 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:57:01,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:57:01,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:57:01,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:57:01,845 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:57:01,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:57:01,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:57:01,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:57:01,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:57:01,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:57:01,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:57:01,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:57:01,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:57:01,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:57:01,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:57:01,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:57:01,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:57:01,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:57:01,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:57:01,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:57:01,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:57:01,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:57:01,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:57:01,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:57:01,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:57:01,851 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:57:02,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:57:02,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:57:02,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:57:02,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:57:02,328 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:57:02,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_running-1.i [2021-01-06 09:57:02,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0479263bf/a8438ab6ad4547408dccd05b2ce9c2f4/FLAG2864b9baf [2021-01-06 09:57:03,177 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:57:03,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-1.i [2021-01-06 09:57:03,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0479263bf/a8438ab6ad4547408dccd05b2ce9c2f4/FLAG2864b9baf [2021-01-06 09:57:03,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0479263bf/a8438ab6ad4547408dccd05b2ce9c2f4 [2021-01-06 09:57:03,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:57:03,519 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:57:03,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:57:03,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:57:03,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:57:03,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:57:03" (1/1) ... [2021-01-06 09:57:03,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dded8b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:03, skipping insertion in model container [2021-01-06 09:57:03,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:57:03" (1/1) ... [2021-01-06 09:57:03,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:57:03,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:57:03,700 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-examples/standard_running-1.i[811,824] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 09:57:03,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:57:03,734 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:57:03,750 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-examples/standard_running-1.i[811,824] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 09:57:03,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:57:03,778 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:57:03,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:03 WrapperNode [2021-01-06 09:57:03,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:57:03,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:57:03,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:57:03,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:57:03,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:03" (1/1) ... [2021-01-06 09:57:03,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:03" (1/1) ... [2021-01-06 09:57:03,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:57:03,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:57:03,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:57:03,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:57:03,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:03" (1/1) ... [2021-01-06 09:57:03,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:03" (1/1) ... [2021-01-06 09:57:03,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:03" (1/1) ... [2021-01-06 09:57:03,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:03" (1/1) ... [2021-01-06 09:57:03,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:03" (1/1) ... [2021-01-06 09:57:03,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:03" (1/1) ... [2021-01-06 09:57:03,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:03" (1/1) ... [2021-01-06 09:57:03,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:57:03,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:57:03,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:57:03,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:57:03,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:57:04,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:57:04,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:57:04,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:57:04,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:57:04,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:57:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:57:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:57:04,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:57:04,488 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 09:57:04,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:57:04 BoogieIcfgContainer [2021-01-06 09:57:04,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:57:04,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:57:04,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:57:04,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:57:04,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:57:03" (1/3) ... [2021-01-06 09:57:04,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d63b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:57:04, skipping insertion in model container [2021-01-06 09:57:04,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:03" (2/3) ... [2021-01-06 09:57:04,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d63b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:57:04, skipping insertion in model container [2021-01-06 09:57:04,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:57:04" (3/3) ... [2021-01-06 09:57:04,500 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2021-01-06 09:57:04,508 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:57:04,513 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:57:04,543 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:57:04,583 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:57:04,584 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:57:04,584 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:57:04,584 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:57:04,584 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:57:04,584 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:57:04,585 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:57:04,585 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:57:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-01-06 09:57:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 09:57:04,607 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:04,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:04,608 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:04,616 INFO L82 PathProgramCache]: Analyzing trace with hash -2030235279, now seen corresponding path program 1 times [2021-01-06 09:57:04,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:04,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660885582] [2021-01-06 09:57:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:57:04,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660885582] [2021-01-06 09:57:04,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:57:04,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 09:57:04,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104331391] [2021-01-06 09:57:04,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 09:57:04,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:04,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 09:57:04,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 09:57:04,830 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2021-01-06 09:57:04,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:04,849 INFO L93 Difference]: Finished difference Result 44 states and 64 transitions. [2021-01-06 09:57:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 09:57:04,850 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 09:57:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:04,859 INFO L225 Difference]: With dead ends: 44 [2021-01-06 09:57:04,860 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 09:57:04,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 09:57:04,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 09:57:04,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 09:57:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 09:57:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2021-01-06 09:57:04,907 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 10 [2021-01-06 09:57:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:04,907 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2021-01-06 09:57:04,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 09:57:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2021-01-06 09:57:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 09:57:04,908 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:04,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:04,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:57:04,909 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:04,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:04,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1948917626, now seen corresponding path program 1 times [2021-01-06 09:57:04,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:04,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707454627] [2021-01-06 09:57:04,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:57:04,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707454627] [2021-01-06 09:57:04,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:57:04,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:57:04,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613125139] [2021-01-06 09:57:04,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:57:04,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:04,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:57:04,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:57:04,976 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand 3 states. [2021-01-06 09:57:05,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:05,093 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2021-01-06 09:57:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:57:05,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 09:57:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:05,096 INFO L225 Difference]: With dead ends: 48 [2021-01-06 09:57:05,096 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:57:05,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:57:05,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:57:05,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-01-06 09:57:05,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 09:57:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-01-06 09:57:05,104 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2021-01-06 09:57:05,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:05,104 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-01-06 09:57:05,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:57:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-01-06 09:57:05,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 09:57:05,106 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:05,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:05,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 09:57:05,106 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:05,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:05,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1221461665, now seen corresponding path program 1 times [2021-01-06 09:57:05,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:05,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464431450] [2021-01-06 09:57:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:57:05,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464431450] [2021-01-06 09:57:05,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405908849] [2021-01-06 09:57:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:05,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:57:05,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:57:05,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:05,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:57:05,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582064308] [2021-01-06 09:57:05,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:57:05,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:05,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:57:05,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:57:05,389 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 5 states. [2021-01-06 09:57:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:05,482 INFO L93 Difference]: Finished difference Result 62 states and 88 transitions. [2021-01-06 09:57:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:57:05,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-01-06 09:57:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:05,484 INFO L225 Difference]: With dead ends: 62 [2021-01-06 09:57:05,484 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 09:57:05,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:57:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 09:57:05,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-01-06 09:57:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 09:57:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2021-01-06 09:57:05,492 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 22 [2021-01-06 09:57:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:05,493 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-01-06 09:57:05,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:57:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2021-01-06 09:57:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 09:57:05,494 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:05,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:05,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 09:57:05,710 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:05,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:05,712 INFO L82 PathProgramCache]: Analyzing trace with hash 36788574, now seen corresponding path program 2 times [2021-01-06 09:57:05,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:05,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832268630] [2021-01-06 09:57:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:57:05,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832268630] [2021-01-06 09:57:05,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:57:05,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 09:57:05,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597598405] [2021-01-06 09:57:05,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:57:05,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:05,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:57:05,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:57:05,882 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand 5 states. [2021-01-06 09:57:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:05,956 INFO L93 Difference]: Finished difference Result 61 states and 86 transitions. [2021-01-06 09:57:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:57:05,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2021-01-06 09:57:05,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:05,958 INFO L225 Difference]: With dead ends: 61 [2021-01-06 09:57:05,958 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 09:57:05,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:57:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 09:57:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-01-06 09:57:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 09:57:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2021-01-06 09:57:05,966 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 34 [2021-01-06 09:57:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:05,967 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2021-01-06 09:57:05,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:57:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2021-01-06 09:57:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 09:57:05,972 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:05,972 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:05,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 09:57:05,972 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:05,974 INFO L82 PathProgramCache]: Analyzing trace with hash 271130974, now seen corresponding path program 1 times [2021-01-06 09:57:05,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:05,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631918581] [2021-01-06 09:57:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 09:57:06,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631918581] [2021-01-06 09:57:06,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214175184] [2021-01-06 09:57:06,112 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 [2021-01-06 09:57:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:06,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:57:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 09:57:06,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:06,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:57:06,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268869133] [2021-01-06 09:57:06,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:57:06,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:06,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:57:06,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:57:06,257 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand 6 states. [2021-01-06 09:57:06,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:06,380 INFO L93 Difference]: Finished difference Result 108 states and 150 transitions. [2021-01-06 09:57:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:57:06,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2021-01-06 09:57:06,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:06,382 INFO L225 Difference]: With dead ends: 108 [2021-01-06 09:57:06,382 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 09:57:06,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:57:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 09:57:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2021-01-06 09:57:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 09:57:06,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2021-01-06 09:57:06,392 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 34 [2021-01-06 09:57:06,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:06,392 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2021-01-06 09:57:06,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:57:06,393 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2021-01-06 09:57:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 09:57:06,394 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:06,394 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:06,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:06,608 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:06,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:06,609 INFO L82 PathProgramCache]: Analyzing trace with hash 984188611, now seen corresponding path program 2 times [2021-01-06 09:57:06,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:06,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222858064] [2021-01-06 09:57:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:57:06,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222858064] [2021-01-06 09:57:06,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414661936] [2021-01-06 09:57:06,727 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 [2021-01-06 09:57:06,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:06,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:06,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:57:06,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:57:06,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:06,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:57:06,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976731934] [2021-01-06 09:57:06,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:57:06,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:06,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:57:06,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:57:06,914 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand 7 states. [2021-01-06 09:57:07,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:07,045 INFO L93 Difference]: Finished difference Result 138 states and 192 transitions. [2021-01-06 09:57:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:57:07,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2021-01-06 09:57:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:07,047 INFO L225 Difference]: With dead ends: 138 [2021-01-06 09:57:07,047 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 09:57:07,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:57:07,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 09:57:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2021-01-06 09:57:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 09:57:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2021-01-06 09:57:07,056 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 46 [2021-01-06 09:57:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:07,057 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2021-01-06 09:57:07,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:57:07,057 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2021-01-06 09:57:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 09:57:07,059 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:07,059 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:07,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:07,274 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:07,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:07,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1354664638, now seen corresponding path program 3 times [2021-01-06 09:57:07,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:07,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932928254] [2021-01-06 09:57:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-01-06 09:57:07,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932928254] [2021-01-06 09:57:07,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522276544] [2021-01-06 09:57:07,416 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 [2021-01-06 09:57:07,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:57:07,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:07,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:57:07,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:07,670 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 09:57:07,672 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:07,679 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:07,680 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:07,681 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 09:57:08,066 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:08,075 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 09:57:08,112 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:08,113 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-01-06 09:57:08,116 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:08,118 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:08,127 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:08,128 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-01-06 09:57:08,130 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:08,180 INFO L625 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2021-01-06 09:57:08,187 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 09:57:08,188 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:69, output treesize:18 [2021-01-06 09:57:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 09:57:08,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:08,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-01-06 09:57:08,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066946248] [2021-01-06 09:57:08,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:57:08,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:08,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:57:08,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:57:08,288 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand 14 states. [2021-01-06 09:57:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:09,264 INFO L93 Difference]: Finished difference Result 290 states and 416 transitions. [2021-01-06 09:57:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 09:57:09,265 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2021-01-06 09:57:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:09,271 INFO L225 Difference]: With dead ends: 290 [2021-01-06 09:57:09,271 INFO L226 Difference]: Without dead ends: 226 [2021-01-06 09:57:09,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 09:57:09,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-01-06 09:57:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 204. [2021-01-06 09:57:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2021-01-06 09:57:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 285 transitions. [2021-01-06 09:57:09,325 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 285 transitions. Word has length 58 [2021-01-06 09:57:09,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:09,325 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 285 transitions. [2021-01-06 09:57:09,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:57:09,326 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 285 transitions. [2021-01-06 09:57:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 09:57:09,331 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:09,332 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:09,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:09,547 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:09,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:09,548 INFO L82 PathProgramCache]: Analyzing trace with hash -937413107, now seen corresponding path program 1 times [2021-01-06 09:57:09,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:09,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089159166] [2021-01-06 09:57:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-01-06 09:57:09,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089159166] [2021-01-06 09:57:09,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564537290] [2021-01-06 09:57:09,769 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:09,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:57:09,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-01-06 09:57:10,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:10,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:57:10,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261355643] [2021-01-06 09:57:10,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:57:10,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:10,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:57:10,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:57:10,003 INFO L87 Difference]: Start difference. First operand 204 states and 285 transitions. Second operand 11 states. [2021-01-06 09:57:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:10,257 INFO L93 Difference]: Finished difference Result 472 states and 660 transitions. [2021-01-06 09:57:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:57:10,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2021-01-06 09:57:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:10,260 INFO L225 Difference]: With dead ends: 472 [2021-01-06 09:57:10,260 INFO L226 Difference]: Without dead ends: 285 [2021-01-06 09:57:10,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:57:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-01-06 09:57:10,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2021-01-06 09:57:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2021-01-06 09:57:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 323 transitions. [2021-01-06 09:57:10,276 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 323 transitions. Word has length 94 [2021-01-06 09:57:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:10,277 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 323 transitions. [2021-01-06 09:57:10,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:57:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 323 transitions. [2021-01-06 09:57:10,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 09:57:10,287 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:10,287 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:10,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:10,506 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:10,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1234891020, now seen corresponding path program 2 times [2021-01-06 09:57:10,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:10,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813588653] [2021-01-06 09:57:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-01-06 09:57:10,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813588653] [2021-01-06 09:57:10,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666436243] [2021-01-06 09:57:10,708 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:10,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:10,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:10,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:57:10,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-01-06 09:57:10,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:10,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:57:10,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022699175] [2021-01-06 09:57:10,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:57:10,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:10,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:57:10,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:57:10,926 INFO L87 Difference]: Start difference. First operand 231 states and 323 transitions. Second operand 12 states. [2021-01-06 09:57:11,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:11,169 INFO L93 Difference]: Finished difference Result 524 states and 734 transitions. [2021-01-06 09:57:11,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:57:11,170 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 106 [2021-01-06 09:57:11,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:11,172 INFO L225 Difference]: With dead ends: 524 [2021-01-06 09:57:11,172 INFO L226 Difference]: Without dead ends: 312 [2021-01-06 09:57:11,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:57:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-01-06 09:57:11,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 258. [2021-01-06 09:57:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2021-01-06 09:57:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 361 transitions. [2021-01-06 09:57:11,194 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 361 transitions. Word has length 106 [2021-01-06 09:57:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:11,194 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 361 transitions. [2021-01-06 09:57:11,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:57:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 361 transitions. [2021-01-06 09:57:11,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 09:57:11,206 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:11,206 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:11,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:11,420 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:11,421 INFO L82 PathProgramCache]: Analyzing trace with hash -967925327, now seen corresponding path program 3 times [2021-01-06 09:57:11,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:11,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750712175] [2021-01-06 09:57:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-01-06 09:57:11,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750712175] [2021-01-06 09:57:11,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748261096] [2021-01-06 09:57:11,662 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:11,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 09:57:11,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:11,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:57:11,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:11,816 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 09:57:11,817 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:11,819 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:11,820 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:11,821 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2021-01-06 09:57:11,887 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-01-06 09:57:11,888 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-01-06 09:57:11,889 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:11,897 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:11,898 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:11,899 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2021-01-06 09:57:12,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 09:57:12,289 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 09:57:12,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:12,321 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:12,322 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-01-06 09:57:12,324 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:12,353 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 09:57:12,354 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2021-01-06 09:57:12,356 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 09:57:12,357 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:12,359 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:12,415 INFO L625 ElimStorePlain]: treesize reduction 1, result has 97.2 percent of original size [2021-01-06 09:57:12,421 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-01-06 09:57:12,422 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:87, output treesize:17 [2021-01-06 09:57:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 39 proven. 101 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-01-06 09:57:12,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:12,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-01-06 09:57:12,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263863723] [2021-01-06 09:57:12,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:57:12,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:12,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:57:12,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:57:12,645 INFO L87 Difference]: Start difference. First operand 258 states and 361 transitions. Second operand 23 states. [2021-01-06 09:57:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:16,197 INFO L93 Difference]: Finished difference Result 890 states and 1256 transitions. [2021-01-06 09:57:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-01-06 09:57:16,198 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 118 [2021-01-06 09:57:16,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:16,202 INFO L225 Difference]: With dead ends: 890 [2021-01-06 09:57:16,202 INFO L226 Difference]: Without dead ends: 653 [2021-01-06 09:57:16,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1857, Invalid=6333, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 09:57:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-01-06 09:57:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 516. [2021-01-06 09:57:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2021-01-06 09:57:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 731 transitions. [2021-01-06 09:57:16,232 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 731 transitions. Word has length 118 [2021-01-06 09:57:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:16,232 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 731 transitions. [2021-01-06 09:57:16,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:57:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 731 transitions. [2021-01-06 09:57:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 09:57:16,235 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:16,235 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:16,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 09:57:16,449 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:16,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:16,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1090307401, now seen corresponding path program 4 times [2021-01-06 09:57:16,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:16,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98761834] [2021-01-06 09:57:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 806 trivial. 0 not checked. [2021-01-06 09:57:16,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98761834] [2021-01-06 09:57:16,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747576682] [2021-01-06 09:57:16,705 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:16,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:57:16,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:16,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 09:57:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:16,990 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 09:57:16,991 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:16,997 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:16,998 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:16,998 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 09:57:17,072 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:17,073 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 09:57:17,075 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:17,095 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2021-01-06 09:57:17,095 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:17,096 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2021-01-06 09:57:17,181 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-01-06 09:57:17,183 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-01-06 09:57:17,185 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:17,192 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:17,193 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:17,197 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-01-06 09:57:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 197 proven. 592 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-01-06 09:57:17,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:17,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 30] total 43 [2021-01-06 09:57:17,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398148466] [2021-01-06 09:57:17,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 09:57:17,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:17,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 09:57:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1404, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 09:57:17,960 INFO L87 Difference]: Start difference. First operand 516 states and 731 transitions. Second operand 43 states. [2021-01-06 09:57:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:20,029 INFO L93 Difference]: Finished difference Result 1471 states and 2083 transitions. [2021-01-06 09:57:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 09:57:20,030 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2021-01-06 09:57:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:20,036 INFO L225 Difference]: With dead ends: 1471 [2021-01-06 09:57:20,036 INFO L226 Difference]: Without dead ends: 984 [2021-01-06 09:57:20,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=434, Invalid=1636, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 09:57:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-01-06 09:57:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 680. [2021-01-06 09:57:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2021-01-06 09:57:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 966 transitions. [2021-01-06 09:57:20,072 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 966 transitions. Word has length 166 [2021-01-06 09:57:20,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:20,072 INFO L481 AbstractCegarLoop]: Abstraction has 680 states and 966 transitions. [2021-01-06 09:57:20,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 09:57:20,073 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 966 transitions. [2021-01-06 09:57:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-01-06 09:57:20,076 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:20,076 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:20,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 09:57:20,290 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:20,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1067722828, now seen corresponding path program 5 times [2021-01-06 09:57:20,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:20,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203700380] [2021-01-06 09:57:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 938 trivial. 0 not checked. [2021-01-06 09:57:20,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203700380] [2021-01-06 09:57:20,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588897480] [2021-01-06 09:57:20,567 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:29,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-01-06 09:57:29,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:29,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:57:29,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-01-06 09:57:29,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:29,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:57:29,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33716278] [2021-01-06 09:57:29,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:57:29,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:29,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:57:29,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:57:29,527 INFO L87 Difference]: Start difference. First operand 680 states and 966 transitions. Second operand 18 states. [2021-01-06 09:57:29,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:29,878 INFO L93 Difference]: Finished difference Result 1566 states and 2226 transitions. [2021-01-06 09:57:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:57:29,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 178 [2021-01-06 09:57:29,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:29,884 INFO L225 Difference]: With dead ends: 1566 [2021-01-06 09:57:29,884 INFO L226 Difference]: Without dead ends: 917 [2021-01-06 09:57:29,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:57:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-01-06 09:57:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 721. [2021-01-06 09:57:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2021-01-06 09:57:29,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1024 transitions. [2021-01-06 09:57:29,919 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1024 transitions. Word has length 178 [2021-01-06 09:57:29,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:29,919 INFO L481 AbstractCegarLoop]: Abstraction has 721 states and 1024 transitions. [2021-01-06 09:57:29,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:57:29,920 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1024 transitions. [2021-01-06 09:57:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-01-06 09:57:29,923 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:29,923 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:30,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:30,137 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:30,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1455991971, now seen corresponding path program 6 times [2021-01-06 09:57:30,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:30,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638698798] [2021-01-06 09:57:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-01-06 09:57:30,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638698798] [2021-01-06 09:57:30,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145011650] [2021-01-06 09:57:30,504 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:31,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 09:57:31,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:31,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:57:31,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:31,254 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 09:57:31,255 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:31,257 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:31,257 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:31,258 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2021-01-06 09:57:31,312 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-01-06 09:57:31,315 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-01-06 09:57:31,317 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:31,322 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:31,322 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:31,323 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2021-01-06 09:57:31,417 INFO L348 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-01-06 09:57:31,417 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2021-01-06 09:57:31,420 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:31,428 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:31,429 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:31,429 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2021-01-06 09:57:34,914 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 09:57:34,918 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 09:57:34,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:34,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:34,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:34,965 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:34,965 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2021-01-06 09:57:34,967 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 09:57:34,969 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 09:57:34,970 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:34,972 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:35,010 INFO L348 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2021-01-06 09:57:35,011 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2021-01-06 09:57:35,014 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:35,058 INFO L625 ElimStorePlain]: treesize reduction 1, result has 97.8 percent of original size [2021-01-06 09:57:35,063 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-01-06 09:57:35,063 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:111, output treesize:23 [2021-01-06 09:57:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 106 proven. 266 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2021-01-06 09:57:35,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:35,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-01-06 09:57:35,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289649337] [2021-01-06 09:57:35,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 09:57:35,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:35,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 09:57:35,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=697, Unknown=2, NotChecked=0, Total=992 [2021-01-06 09:57:35,552 INFO L87 Difference]: Start difference. First operand 721 states and 1024 transitions. Second operand 32 states. [2021-01-06 09:57:51,439 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 09:58:06,961 WARN L197 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-01-06 09:58:28,186 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 09:58:50,806 WARN L197 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 09:59:15,167 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 09:59:41,636 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 10:00:10,040 WARN L197 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 10:00:30,123 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 10:00:54,169 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 10:01:19,509 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36