/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/sanfoundry_27_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:37:54,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:37:54,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:37:54,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:37:54,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:37:54,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:37:54,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:37:54,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:37:54,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:37:54,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:37:54,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:37:54,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:37:54,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:37:54,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:37:54,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:37:54,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:37:54,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:37:54,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:37:54,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:37:54,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:37:54,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:37:54,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:37:54,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:37:54,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:37:54,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:37:54,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:37:54,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:37:54,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:37:54,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:37:54,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:37:54,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:37:54,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:37:54,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:37:54,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:37:54,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:37:54,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:37:54,795 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 09:37:54,847 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:37:54,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:37:54,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:37:54,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:37:54,853 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:37:54,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:37:54,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:37:54,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:37:54,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:37:54,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:37:54,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:37:54,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:37:54,856 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:37:54,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:37:54,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:37:54,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:37:54,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:37:54,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:37:54,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:37:54,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:37:54,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:37:54,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:37:54,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:37:54,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:37:54,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:37:54,860 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:37:55,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:37:55,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:37:55,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:37:55,384 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:37:55,384 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:37:55,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_27_ground.i [2021-01-06 09:37:55,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5ac7eeae9/64eb3f71a5204866aa3bad376ae119e7/FLAG46dcd77dc [2021-01-06 09:37:56,230 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:37:56,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_27_ground.i [2021-01-06 09:37:56,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5ac7eeae9/64eb3f71a5204866aa3bad376ae119e7/FLAG46dcd77dc [2021-01-06 09:37:56,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5ac7eeae9/64eb3f71a5204866aa3bad376ae119e7 [2021-01-06 09:37:56,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:37:56,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:37:56,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:37:56,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:37:56,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:37:56,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692b728c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56, skipping insertion in model container [2021-01-06 09:37:56,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:37:56,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:37:56,826 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/sanfoundry_27_ground.i[813,826] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~largest~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:37:56,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:37:56,860 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:37:56,881 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/sanfoundry_27_ground.i[813,826] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~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[~largest~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:37:56,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:37:56,929 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:37:56,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56 WrapperNode [2021-01-06 09:37:56,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:37:56,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:37:56,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:37:56,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:37:56,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:37:56,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:37:56,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:37:56,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:37:57,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:57,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:37:57,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:37:57,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:37:57,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:37:57,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (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 09:37:57,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:37:57,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:37:57,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:37:57,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:37:57,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:37:57,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:37:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:37:57,670 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:37:57,670 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 09:37:57,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:37:57 BoogieIcfgContainer [2021-01-06 09:37:57,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:37:57,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:37:57,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:37:57,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:37:57,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:37:56" (1/3) ... [2021-01-06 09:37:57,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fcc478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:37:57, skipping insertion in model container [2021-01-06 09:37:57,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (2/3) ... [2021-01-06 09:37:57,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57fcc478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:37:57, skipping insertion in model container [2021-01-06 09:37:57,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:37:57" (3/3) ... [2021-01-06 09:37:57,700 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.i [2021-01-06 09:37:57,719 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:37:57,732 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:37:57,770 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:37:57,818 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:37:57,819 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:37:57,819 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:37:57,819 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:37:57,819 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:37:57,820 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:37:57,820 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:37:57,820 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:37:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-01-06 09:37:57,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 09:37:57,848 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:57,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:57,849 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2006137184, now seen corresponding path program 1 times [2021-01-06 09:37:57,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:57,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117882732] [2021-01-06 09:37:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,082 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 09:37:58,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117882732] [2021-01-06 09:37:58,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:37:58,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 09:37:58,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59782466] [2021-01-06 09:37:58,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 09:37:58,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:58,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 09:37:58,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 09:37:58,118 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2021-01-06 09:37:58,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:58,139 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-01-06 09:37:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 09:37:58,141 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 09:37:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:58,155 INFO L225 Difference]: With dead ends: 34 [2021-01-06 09:37:58,156 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 09:37:58,159 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 09:37:58,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 09:37:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 09:37:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 09:37:58,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-01-06 09:37:58,204 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2021-01-06 09:37:58,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:58,204 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-01-06 09:37:58,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 09:37:58,205 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-01-06 09:37:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 09:37:58,206 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:58,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:58,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:37:58,208 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:58,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:58,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2016295915, now seen corresponding path program 1 times [2021-01-06 09:37:58,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:58,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622033660] [2021-01-06 09:37:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,270 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 09:37:58,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622033660] [2021-01-06 09:37:58,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:37:58,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:37:58,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968324952] [2021-01-06 09:37:58,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:37:58,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:58,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:37:58,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:37:58,274 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2021-01-06 09:37:58,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:58,320 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-01-06 09:37:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:37:58,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 09:37:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:58,322 INFO L225 Difference]: With dead ends: 28 [2021-01-06 09:37:58,322 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 09:37:58,323 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 09:37:58,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 09:37:58,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-01-06 09:37:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 09:37:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-01-06 09:37:58,328 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-01-06 09:37:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:58,328 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-01-06 09:37:58,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:37:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-01-06 09:37:58,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 09:37:58,329 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:58,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:58,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 09:37:58,330 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:58,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:58,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1564799315, now seen corresponding path program 1 times [2021-01-06 09:37:58,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:58,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43328063] [2021-01-06 09:37:58,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:37:58,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43328063] [2021-01-06 09:37:58,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937640955] [2021-01-06 09:37:58,377 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 09:37:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:37:58,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:37:58,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:37:58,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-01-06 09:37:58,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874887840] [2021-01-06 09:37:58,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:37:58,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:58,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:37:58,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 09:37:58,472 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2021-01-06 09:37:58,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:58,503 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-01-06 09:37:58,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:37:58,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 09:37:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:58,504 INFO L225 Difference]: With dead ends: 27 [2021-01-06 09:37:58,504 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 09:37:58,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 09:37:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 09:37:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-01-06 09:37:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 09:37:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-01-06 09:37:58,510 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2021-01-06 09:37:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:58,510 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-01-06 09:37:58,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:37:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-01-06 09:37:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 09:37:58,511 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:58,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:58,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 09:37:58,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:58,728 INFO L82 PathProgramCache]: Analyzing trace with hash -324137903, now seen corresponding path program 1 times [2021-01-06 09:37:58,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:58,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056150839] [2021-01-06 09:37:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:37:58,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056150839] [2021-01-06 09:37:58,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790374886] [2021-01-06 09:37:58,788 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 09:37:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:37:58,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:37:58,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:37:58,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:37:58,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854721257] [2021-01-06 09:37:58,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:37:58,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:58,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:37:58,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:58,961 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2021-01-06 09:37:59,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:59,008 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-01-06 09:37:59,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:37:59,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 09:37:59,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:59,010 INFO L225 Difference]: With dead ends: 34 [2021-01-06 09:37:59,011 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 09:37:59,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 09:37:59,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-01-06 09:37:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 09:37:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-01-06 09:37:59,018 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2021-01-06 09:37:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:59,018 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-01-06 09:37:59,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:37:59,019 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-01-06 09:37:59,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 09:37:59,020 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:59,020 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:59,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:59,235 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:59,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1157925421, now seen corresponding path program 2 times [2021-01-06 09:37:59,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:59,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912971773] [2021-01-06 09:37:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:37:59,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912971773] [2021-01-06 09:37:59,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214204340] [2021-01-06 09:37:59,299 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 09:37:59,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:37:59,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:37:59,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:37:59,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:37:59,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:37:59,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-01-06 09:37:59,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569419906] [2021-01-06 09:37:59,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:37:59,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:59,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:37:59,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:37:59,425 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2021-01-06 09:37:59,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:59,479 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-01-06 09:37:59,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:37:59,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2021-01-06 09:37:59,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:59,481 INFO L225 Difference]: With dead ends: 39 [2021-01-06 09:37:59,481 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 09:37:59,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:37:59,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 09:37:59,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-01-06 09:37:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:37:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 09:37:59,487 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-01-06 09:37:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:59,488 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 09:37:59,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:37:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 09:37:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:37:59,489 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:59,489 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:59,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:59,706 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1946849393, now seen corresponding path program 3 times [2021-01-06 09:37:59,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:59,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019823558] [2021-01-06 09:37:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:37:59,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019823558] [2021-01-06 09:37:59,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327369780] [2021-01-06 09:37:59,811 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 09:37:59,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:37:59,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:37:59,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:37:59,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:37:59,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:37:59,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:37:59,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732493017] [2021-01-06 09:37:59,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:37:59,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:59,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:37:59,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:37:59,914 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2021-01-06 09:37:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:59,968 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-01-06 09:37:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:37:59,968 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 09:37:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:59,969 INFO L225 Difference]: With dead ends: 37 [2021-01-06 09:37:59,970 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 09:37:59,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 09:37:59,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 09:37:59,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-01-06 09:37:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 09:37:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-01-06 09:37:59,976 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 21 [2021-01-06 09:37:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:59,976 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-01-06 09:37:59,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:37:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-01-06 09:37:59,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 09:37:59,978 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:59,978 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:00,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:00,192 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:00,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:00,193 INFO L82 PathProgramCache]: Analyzing trace with hash 962598037, now seen corresponding path program 4 times [2021-01-06 09:38:00,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:00,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916582795] [2021-01-06 09:38:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:38:00,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916582795] [2021-01-06 09:38:00,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587070435] [2021-01-06 09:38:00,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:00,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:00,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:00,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:38:00,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:38:00,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:00,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:38:00,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738086116] [2021-01-06 09:38:00,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:38:00,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:00,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:38:00,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:38:00,371 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 7 states. [2021-01-06 09:38:00,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:00,430 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2021-01-06 09:38:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:38:00,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2021-01-06 09:38:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:00,431 INFO L225 Difference]: With dead ends: 50 [2021-01-06 09:38:00,431 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:38:00,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:38:00,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:38:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-01-06 09:38:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 09:38:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-01-06 09:38:00,438 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 24 [2021-01-06 09:38:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:00,439 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-01-06 09:38:00,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:38:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-01-06 09:38:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 09:38:00,440 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:00,440 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:00,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 09:38:00,654 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:00,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:00,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1260321897, now seen corresponding path program 5 times [2021-01-06 09:38:00,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:00,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972598477] [2021-01-06 09:38:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:38:00,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972598477] [2021-01-06 09:38:00,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229755165] [2021-01-06 09:38:00,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:00,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 09:38:00,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:00,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:38:00,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 09:38:00,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:00,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-01-06 09:38:00,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857181483] [2021-01-06 09:38:00,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:38:00,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:00,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:38:00,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:38:00,895 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 7 states. [2021-01-06 09:38:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:00,954 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2021-01-06 09:38:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:38:00,955 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-01-06 09:38:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:00,956 INFO L225 Difference]: With dead ends: 55 [2021-01-06 09:38:00,956 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 09:38:00,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:38:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 09:38:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-01-06 09:38:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 09:38:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-01-06 09:38:00,962 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 26 [2021-01-06 09:38:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:00,963 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-01-06 09:38:00,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:38:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-01-06 09:38:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 09:38:00,964 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:00,964 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:01,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:01,179 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:01,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:01,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1241135669, now seen corresponding path program 6 times [2021-01-06 09:38:01,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:01,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919093302] [2021-01-06 09:38:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 09:38:01,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919093302] [2021-01-06 09:38:01,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105464177] [2021-01-06 09:38:01,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:01,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 09:38:01,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:01,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:38:01,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 09:38:01,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:01,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-01-06 09:38:01,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143291179] [2021-01-06 09:38:01,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:38:01,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:01,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:38:01,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:38:01,422 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 8 states. [2021-01-06 09:38:01,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:01,498 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-01-06 09:38:01,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:38:01,499 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2021-01-06 09:38:01,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:01,500 INFO L225 Difference]: With dead ends: 63 [2021-01-06 09:38:01,500 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 09:38:01,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:38:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 09:38:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-01-06 09:38:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 09:38:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-01-06 09:38:01,507 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 31 [2021-01-06 09:38:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:01,507 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-01-06 09:38:01,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:38:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-01-06 09:38:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 09:38:01,508 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:01,508 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:01,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:01,722 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:01,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:01,723 INFO L82 PathProgramCache]: Analyzing trace with hash 78567771, now seen corresponding path program 7 times [2021-01-06 09:38:01,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:01,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434897530] [2021-01-06 09:38:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 09:38:01,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434897530] [2021-01-06 09:38:01,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774579018] [2021-01-06 09:38:01,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:01,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:38:01,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 09:38:01,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:01,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:38:01,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373581954] [2021-01-06 09:38:01,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:38:01,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:01,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:38:01,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:38:01,937 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 10 states. [2021-01-06 09:38:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:02,040 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2021-01-06 09:38:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:38:02,041 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2021-01-06 09:38:02,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:02,042 INFO L225 Difference]: With dead ends: 71 [2021-01-06 09:38:02,042 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 09:38:02,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:38:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 09:38:02,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-01-06 09:38:02,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:38:02,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-01-06 09:38:02,048 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 36 [2021-01-06 09:38:02,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:02,049 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-01-06 09:38:02,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:38:02,049 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-01-06 09:38:02,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:38:02,050 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:02,050 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:02,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 09:38:02,264 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:02,264 INFO L82 PathProgramCache]: Analyzing trace with hash 266712071, now seen corresponding path program 8 times [2021-01-06 09:38:02,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:02,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648650694] [2021-01-06 09:38:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 09:38:02,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648650694] [2021-01-06 09:38:02,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086143375] [2021-01-06 09:38:02,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:02,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:02,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:02,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:38:02,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 09:38:02,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:02,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:38:02,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644493783] [2021-01-06 09:38:02,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:38:02,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:02,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:38:02,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:38:02,620 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 11 states. [2021-01-06 09:38:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:02,709 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2021-01-06 09:38:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:38:02,710 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2021-01-06 09:38:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:02,711 INFO L225 Difference]: With dead ends: 79 [2021-01-06 09:38:02,711 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 09:38:02,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 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 09:38:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 09:38:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-01-06 09:38:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 09:38:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2021-01-06 09:38:02,718 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 41 [2021-01-06 09:38:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:02,718 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2021-01-06 09:38:02,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:38:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2021-01-06 09:38:02,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 09:38:02,719 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:02,719 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:02,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:02,934 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:02,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:02,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1334495457, now seen corresponding path program 9 times [2021-01-06 09:38:02,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:02,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239015767] [2021-01-06 09:38:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 09:38:03,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239015767] [2021-01-06 09:38:03,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620286453] [2021-01-06 09:38:03,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:03,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 09:38:03,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:03,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:38:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:38:03,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:03,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-01-06 09:38:03,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249927624] [2021-01-06 09:38:03,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:38:03,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:03,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:38:03,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:38:03,269 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 11 states. [2021-01-06 09:38:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:03,362 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2021-01-06 09:38:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:38:03,362 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2021-01-06 09:38:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:03,364 INFO L225 Difference]: With dead ends: 87 [2021-01-06 09:38:03,364 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 09:38:03,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:38:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 09:38:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-01-06 09:38:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 09:38:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-01-06 09:38:03,382 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2021-01-06 09:38:03,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:03,383 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-01-06 09:38:03,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:38:03,383 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-01-06 09:38:03,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 09:38:03,386 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:03,386 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:03,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:03,600 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:03,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:03,601 INFO L82 PathProgramCache]: Analyzing trace with hash 134543939, now seen corresponding path program 10 times [2021-01-06 09:38:03,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:03,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160130668] [2021-01-06 09:38:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 09:38:03,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160130668] [2021-01-06 09:38:03,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714093918] [2021-01-06 09:38:03,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:03,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:03,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:03,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:38:03,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 09:38:03,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:03,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:38:03,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143360450] [2021-01-06 09:38:03,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:38:03,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:03,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:38:03,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:38:03,933 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 13 states. [2021-01-06 09:38:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:04,037 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2021-01-06 09:38:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:38:04,038 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2021-01-06 09:38:04,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:04,039 INFO L225 Difference]: With dead ends: 95 [2021-01-06 09:38:04,039 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 09:38:04,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:38:04,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 09:38:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-01-06 09:38:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 09:38:04,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-01-06 09:38:04,060 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 51 [2021-01-06 09:38:04,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:04,060 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-01-06 09:38:04,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:38:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-01-06 09:38:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 09:38:04,062 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:04,062 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:04,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:38:04,263 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:04,264 INFO L82 PathProgramCache]: Analyzing trace with hash 642014435, now seen corresponding path program 11 times [2021-01-06 09:38:04,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:04,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391340106] [2021-01-06 09:38:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 09:38:04,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391340106] [2021-01-06 09:38:04,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18908211] [2021-01-06 09:38:04,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:04,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 09:38:04,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:38:04,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:38:04,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:04,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-01-06 09:38:04,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363959927] [2021-01-06 09:38:04,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:38:04,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:04,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:38:04,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:38:04,641 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 13 states. [2021-01-06 09:38:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:04,758 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2021-01-06 09:38:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:38:04,759 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2021-01-06 09:38:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:04,760 INFO L225 Difference]: With dead ends: 103 [2021-01-06 09:38:04,760 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 09:38:04,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:38:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 09:38:04,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-01-06 09:38:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 09:38:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-01-06 09:38:04,766 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 56 [2021-01-06 09:38:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:04,766 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-01-06 09:38:04,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:38:04,766 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-01-06 09:38:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:38:04,767 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:04,767 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:04,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:38:04,981 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:04,982 INFO L82 PathProgramCache]: Analyzing trace with hash 47405183, now seen corresponding path program 12 times [2021-01-06 09:38:04,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:04,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821262020] [2021-01-06 09:38:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 09:38:05,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821262020] [2021-01-06 09:38:05,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832328456] [2021-01-06 09:38:05,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:05,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-01-06 09:38:05,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:05,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:38:05,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 09:38:05,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:05,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:38:05,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919796465] [2021-01-06 09:38:05,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:38:05,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:05,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:38:05,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:38:05,558 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 15 states. [2021-01-06 09:38:05,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:05,681 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2021-01-06 09:38:05,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:38:05,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2021-01-06 09:38:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:05,683 INFO L225 Difference]: With dead ends: 111 [2021-01-06 09:38:05,683 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 09:38:05,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:38:05,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 09:38:05,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-01-06 09:38:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 09:38:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2021-01-06 09:38:05,689 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 61 [2021-01-06 09:38:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:05,689 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2021-01-06 09:38:05,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:38:05,689 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2021-01-06 09:38:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 09:38:05,690 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:05,690 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:05,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 09:38:05,907 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:05,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2144564569, now seen corresponding path program 13 times [2021-01-06 09:38:05,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:05,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393479225] [2021-01-06 09:38:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-01-06 09:38:06,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393479225] [2021-01-06 09:38:06,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268269212] [2021-01-06 09:38:06,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:06,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:38:06,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-01-06 09:38:06,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:06,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:38:06,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920694430] [2021-01-06 09:38:06,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:38:06,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:06,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:38:06,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:38:06,294 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 16 states. [2021-01-06 09:38:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:06,432 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2021-01-06 09:38:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:38:06,432 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2021-01-06 09:38:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:06,433 INFO L225 Difference]: With dead ends: 119 [2021-01-06 09:38:06,433 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 09:38:06,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:38:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 09:38:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-01-06 09:38:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 09:38:06,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-01-06 09:38:06,439 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 66 [2021-01-06 09:38:06,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:06,439 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-01-06 09:38:06,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:38:06,439 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-01-06 09:38:06,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 09:38:06,440 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:06,440 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:06,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:06,654 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:06,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:06,655 INFO L82 PathProgramCache]: Analyzing trace with hash 381718203, now seen corresponding path program 14 times [2021-01-06 09:38:06,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:06,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45822038] [2021-01-06 09:38:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 09:38:06,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45822038] [2021-01-06 09:38:06,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136050885] [2021-01-06 09:38:06,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:06,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:06,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:06,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:38:06,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 09:38:07,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:07,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:38:07,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365068959] [2021-01-06 09:38:07,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:38:07,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:07,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:38:07,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:38:07,024 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 17 states. [2021-01-06 09:38:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:07,155 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2021-01-06 09:38:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:38:07,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2021-01-06 09:38:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:07,156 INFO L225 Difference]: With dead ends: 127 [2021-01-06 09:38:07,156 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 09:38:07,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:38:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 09:38:07,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-01-06 09:38:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 09:38:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2021-01-06 09:38:07,162 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 71 [2021-01-06 09:38:07,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:07,162 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2021-01-06 09:38:07,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:38:07,163 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2021-01-06 09:38:07,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 09:38:07,163 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:07,164 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:07,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:38:07,377 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:07,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:07,378 INFO L82 PathProgramCache]: Analyzing trace with hash -935460757, now seen corresponding path program 15 times [2021-01-06 09:38:07,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:07,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985493327] [2021-01-06 09:38:07,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 09:38:07,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985493327] [2021-01-06 09:38:07,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026345147] [2021-01-06 09:38:07,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:07,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-01-06 09:38:07,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:07,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:38:07,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:38:07,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:07,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-01-06 09:38:07,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731965985] [2021-01-06 09:38:07,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:38:07,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:07,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:38:07,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:38:07,903 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 17 states. [2021-01-06 09:38:08,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:08,065 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2021-01-06 09:38:08,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:38:08,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2021-01-06 09:38:08,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:08,067 INFO L225 Difference]: With dead ends: 135 [2021-01-06 09:38:08,067 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 09:38:08,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:38:08,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 09:38:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2021-01-06 09:38:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 09:38:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2021-01-06 09:38:08,072 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 76 [2021-01-06 09:38:08,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:08,073 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2021-01-06 09:38:08,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:38:08,073 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2021-01-06 09:38:08,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 09:38:08,074 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:08,074 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:08,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 09:38:08,290 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:08,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:08,291 INFO L82 PathProgramCache]: Analyzing trace with hash -935568137, now seen corresponding path program 16 times [2021-01-06 09:38:08,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:08,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548008807] [2021-01-06 09:38:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-01-06 09:38:08,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548008807] [2021-01-06 09:38:08,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172798475] [2021-01-06 09:38:08,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:08,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:08,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:08,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:38:08,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 09:38:08,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:08,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-01-06 09:38:08,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939503815] [2021-01-06 09:38:08,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:38:08,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:08,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:38:08,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:08,694 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 18 states. [2021-01-06 09:38:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:08,825 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2021-01-06 09:38:08,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:38:08,826 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2021-01-06 09:38:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:08,827 INFO L225 Difference]: With dead ends: 143 [2021-01-06 09:38:08,827 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 09:38:08,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 09:38:08,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2021-01-06 09:38:08,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 09:38:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2021-01-06 09:38:08,832 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 81 [2021-01-06 09:38:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:08,832 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2021-01-06 09:38:08,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:38:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2021-01-06 09:38:08,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 09:38:08,833 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:08,833 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:09,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:09,049 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:09,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1015610927, now seen corresponding path program 17 times [2021-01-06 09:38:09,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:09,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164071808] [2021-01-06 09:38:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 09:38:09,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164071808] [2021-01-06 09:38:09,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920542772] [2021-01-06 09:38:09,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:09,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 09:38:09,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:09,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:38:09,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 09:38:09,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:09,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-01-06 09:38:09,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598975457] [2021-01-06 09:38:09,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:38:09,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:09,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:38:09,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:38:09,909 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 19 states. [2021-01-06 09:38:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:10,060 INFO L93 Difference]: Finished difference Result 151 states and 188 transitions. [2021-01-06 09:38:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:38:10,060 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2021-01-06 09:38:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:10,062 INFO L225 Difference]: With dead ends: 151 [2021-01-06 09:38:10,062 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 09:38:10,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:38:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 09:38:10,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2021-01-06 09:38:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 09:38:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2021-01-06 09:38:10,068 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 86 [2021-01-06 09:38:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:10,068 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2021-01-06 09:38:10,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:38:10,068 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2021-01-06 09:38:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 09:38:10,069 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:10,069 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:10,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:10,285 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:10,286 INFO L82 PathProgramCache]: Analyzing trace with hash -977894605, now seen corresponding path program 18 times [2021-01-06 09:38:10,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:10,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302821245] [2021-01-06 09:38:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 09:38:10,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302821245] [2021-01-06 09:38:10,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954907577] [2021-01-06 09:38:10,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:11,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-01-06 09:38:11,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:11,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 09:38:11,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 09:38:11,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:11,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 09:38:11,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865139307] [2021-01-06 09:38:11,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:38:11,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:11,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:38:11,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:38:11,188 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 21 states. [2021-01-06 09:38:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:11,360 INFO L93 Difference]: Finished difference Result 159 states and 198 transitions. [2021-01-06 09:38:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 09:38:11,361 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2021-01-06 09:38:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:11,362 INFO L225 Difference]: With dead ends: 159 [2021-01-06 09:38:11,362 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 09:38:11,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:38:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 09:38:11,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-01-06 09:38:11,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 09:38:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2021-01-06 09:38:11,367 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 91 [2021-01-06 09:38:11,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:11,368 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2021-01-06 09:38:11,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:38:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2021-01-06 09:38:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 09:38:11,368 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:11,369 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:11,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:11,570 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:11,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:11,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1826765837, now seen corresponding path program 19 times [2021-01-06 09:38:11,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:11,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310450191] [2021-01-06 09:38:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 09:38:11,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310450191] [2021-01-06 09:38:11,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513408367] [2021-01-06 09:38:11,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:12,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 09:38:12,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 09:38:12,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:12,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 09:38:12,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993768346] [2021-01-06 09:38:12,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 09:38:12,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:12,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 09:38:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 09:38:12,113 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 22 states. [2021-01-06 09:38:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:12,289 INFO L93 Difference]: Finished difference Result 167 states and 208 transitions. [2021-01-06 09:38:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 09:38:12,289 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 96 [2021-01-06 09:38:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:12,290 INFO L225 Difference]: With dead ends: 167 [2021-01-06 09:38:12,290 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 09:38:12,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 09:38:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 09:38:12,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2021-01-06 09:38:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 09:38:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2021-01-06 09:38:12,296 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 96 [2021-01-06 09:38:12,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:12,296 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2021-01-06 09:38:12,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 09:38:12,296 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2021-01-06 09:38:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 09:38:12,297 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:12,297 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:12,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 09:38:12,512 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:12,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1549876881, now seen corresponding path program 20 times [2021-01-06 09:38:12,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:12,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119460162] [2021-01-06 09:38:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-01-06 09:38:12,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119460162] [2021-01-06 09:38:12,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102032708] [2021-01-06 09:38:12,840 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:12,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:12,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:12,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:38:12,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-01-06 09:38:13,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:13,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 09:38:13,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316032407] [2021-01-06 09:38:13,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:38:13,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:13,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:38:13,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:38:13,046 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 23 states. [2021-01-06 09:38:13,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:13,257 INFO L93 Difference]: Finished difference Result 175 states and 218 transitions. [2021-01-06 09:38:13,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:38:13,258 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2021-01-06 09:38:13,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:13,259 INFO L225 Difference]: With dead ends: 175 [2021-01-06 09:38:13,259 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 09:38:13,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:38:13,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 09:38:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-01-06 09:38:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 09:38:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2021-01-06 09:38:13,267 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 101 [2021-01-06 09:38:13,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:13,267 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2021-01-06 09:38:13,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:38:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2021-01-06 09:38:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 09:38:13,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:13,268 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:13,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 09:38:13,483 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:13,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:13,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1041011127, now seen corresponding path program 21 times [2021-01-06 09:38:13,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:13,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865386536] [2021-01-06 09:38:13,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 09:38:13,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865386536] [2021-01-06 09:38:13,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596056335] [2021-01-06 09:38:13,883 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:14,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-01-06 09:38:14,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:14,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:38:14,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 09:38:14,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:14,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 23 [2021-01-06 09:38:14,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942420476] [2021-01-06 09:38:14,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:38:14,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:14,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:38:14,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:38:14,549 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 23 states. [2021-01-06 09:38:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:14,731 INFO L93 Difference]: Finished difference Result 183 states and 228 transitions. [2021-01-06 09:38:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 09:38:14,732 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2021-01-06 09:38:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:14,733 INFO L225 Difference]: With dead ends: 183 [2021-01-06 09:38:14,733 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 09:38:14,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:38:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 09:38:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2021-01-06 09:38:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-01-06 09:38:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2021-01-06 09:38:14,738 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 106 [2021-01-06 09:38:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:14,739 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2021-01-06 09:38:14,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:38:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2021-01-06 09:38:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 09:38:14,740 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:14,740 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:14,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:14,954 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:14,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:14,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1738221653, now seen corresponding path program 22 times [2021-01-06 09:38:14,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:14,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9437032] [2021-01-06 09:38:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-01-06 09:38:15,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9437032] [2021-01-06 09:38:15,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491213538] [2021-01-06 09:38:15,353 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:15,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:15,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:15,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 09:38:15,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-01-06 09:38:15,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:15,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 09:38:15,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498719641] [2021-01-06 09:38:15,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 09:38:15,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:15,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 09:38:15,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 09:38:15,562 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 25 states. [2021-01-06 09:38:15,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:15,794 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2021-01-06 09:38:15,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 09:38:15,794 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 111 [2021-01-06 09:38:15,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:15,795 INFO L225 Difference]: With dead ends: 191 [2021-01-06 09:38:15,795 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 09:38:15,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 09:38:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 09:38:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-01-06 09:38:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 09:38:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2021-01-06 09:38:15,801 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 111 [2021-01-06 09:38:15,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:15,801 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2021-01-06 09:38:15,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 09:38:15,802 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2021-01-06 09:38:15,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-01-06 09:38:15,803 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:15,803 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:16,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 09:38:16,017 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:16,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1352292485, now seen corresponding path program 23 times [2021-01-06 09:38:16,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:16,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193790230] [2021-01-06 09:38:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-01-06 09:38:16,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193790230] [2021-01-06 09:38:16,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256092125] [2021-01-06 09:38:16,448 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:17,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-01-06 09:38:17,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 09:38:17,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-01-06 09:38:18,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:18,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 09:38:18,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849786879] [2021-01-06 09:38:18,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 09:38:18,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:18,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 09:38:18,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:38:18,005 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 26 states. [2021-01-06 09:38:18,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:18,215 INFO L93 Difference]: Finished difference Result 199 states and 248 transitions. [2021-01-06 09:38:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 09:38:18,215 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 116 [2021-01-06 09:38:18,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:18,216 INFO L225 Difference]: With dead ends: 199 [2021-01-06 09:38:18,216 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 09:38:18,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:38:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 09:38:18,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2021-01-06 09:38:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2021-01-06 09:38:18,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2021-01-06 09:38:18,222 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 116 [2021-01-06 09:38:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:18,222 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2021-01-06 09:38:18,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 09:38:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2021-01-06 09:38:18,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-06 09:38:18,224 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:18,224 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:18,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:18,439 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:18,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:18,440 INFO L82 PathProgramCache]: Analyzing trace with hash 947422695, now seen corresponding path program 24 times [2021-01-06 09:38:18,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:18,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823433495] [2021-01-06 09:38:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-01-06 09:38:18,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823433495] [2021-01-06 09:38:18,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980583179] [2021-01-06 09:38:18,872 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:19,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-01-06 09:38:19,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:19,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 09:38:19,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-01-06 09:38:20,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:20,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 09:38:20,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970213085] [2021-01-06 09:38:20,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 09:38:20,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:20,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 09:38:20,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:38:20,042 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 27 states. [2021-01-06 09:38:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:20,306 INFO L93 Difference]: Finished difference Result 207 states and 258 transitions. [2021-01-06 09:38:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 09:38:20,306 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2021-01-06 09:38:20,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:20,307 INFO L225 Difference]: With dead ends: 207 [2021-01-06 09:38:20,307 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 09:38:20,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:38:20,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 09:38:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-01-06 09:38:20,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-01-06 09:38:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2021-01-06 09:38:20,312 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 121 [2021-01-06 09:38:20,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:20,313 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2021-01-06 09:38:20,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 09:38:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2021-01-06 09:38:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 09:38:20,314 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:20,314 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:20,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 09:38:20,529 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:20,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:20,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1657191105, now seen corresponding path program 25 times [2021-01-06 09:38:20,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:20,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368528636] [2021-01-06 09:38:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-01-06 09:38:21,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368528636] [2021-01-06 09:38:21,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037737696] [2021-01-06 09:38:21,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:21,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 09:38:21,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-01-06 09:38:21,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:21,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 09:38:21,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628178232] [2021-01-06 09:38:21,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 09:38:21,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:21,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 09:38:21,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 09:38:21,250 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 28 states. [2021-01-06 09:38:21,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:21,493 INFO L93 Difference]: Finished difference Result 215 states and 268 transitions. [2021-01-06 09:38:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 09:38:21,494 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 126 [2021-01-06 09:38:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:21,495 INFO L225 Difference]: With dead ends: 215 [2021-01-06 09:38:21,495 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 09:38:21,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 09:38:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 09:38:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2021-01-06 09:38:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 09:38:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2021-01-06 09:38:21,501 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 126 [2021-01-06 09:38:21,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:21,501 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2021-01-06 09:38:21,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 09:38:21,501 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2021-01-06 09:38:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-01-06 09:38:21,502 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:21,502 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:21,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 09:38:21,717 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:21,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:21,718 INFO L82 PathProgramCache]: Analyzing trace with hash 843680803, now seen corresponding path program 26 times [2021-01-06 09:38:21,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:21,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344173593] [2021-01-06 09:38:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-01-06 09:38:22,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344173593] [2021-01-06 09:38:22,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123221609] [2021-01-06 09:38:22,220 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:22,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:22,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:22,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 09:38:22,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-01-06 09:38:22,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:22,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 09:38:22,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812757554] [2021-01-06 09:38:22,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:38:22,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:22,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:38:22,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:38:22,453 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand 29 states. [2021-01-06 09:38:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:22,707 INFO L93 Difference]: Finished difference Result 223 states and 278 transitions. [2021-01-06 09:38:22,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 09:38:22,708 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 131 [2021-01-06 09:38:22,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:22,709 INFO L225 Difference]: With dead ends: 223 [2021-01-06 09:38:22,709 INFO L226 Difference]: Without dead ends: 142 [2021-01-06 09:38:22,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:38:22,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-01-06 09:38:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2021-01-06 09:38:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-06 09:38:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2021-01-06 09:38:22,715 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 131 [2021-01-06 09:38:22,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:22,715 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2021-01-06 09:38:22,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:38:22,715 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2021-01-06 09:38:22,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 09:38:22,716 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:22,717 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:22,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 09:38:22,930 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:22,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:22,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1167567619, now seen corresponding path program 27 times [2021-01-06 09:38:22,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:22,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442262709] [2021-01-06 09:38:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-01-06 09:38:23,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442262709] [2021-01-06 09:38:23,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913940942] [2021-01-06 09:38:23,461 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:24,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-01-06 09:38:24,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 09:38:24,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-01-06 09:38:24,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:24,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 29 [2021-01-06 09:38:24,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22182453] [2021-01-06 09:38:24,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:38:24,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:24,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:38:24,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:38:24,761 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 29 states. [2021-01-06 09:38:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:25,008 INFO L93 Difference]: Finished difference Result 231 states and 288 transitions. [2021-01-06 09:38:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 09:38:25,009 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 136 [2021-01-06 09:38:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:25,010 INFO L225 Difference]: With dead ends: 231 [2021-01-06 09:38:25,011 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 09:38:25,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:38:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 09:38:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-01-06 09:38:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 09:38:25,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2021-01-06 09:38:25,016 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 136 [2021-01-06 09:38:25,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:25,017 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2021-01-06 09:38:25,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:38:25,017 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2021-01-06 09:38:25,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-01-06 09:38:25,018 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:25,018 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:25,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:25,233 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:25,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:25,234 INFO L82 PathProgramCache]: Analyzing trace with hash 172468831, now seen corresponding path program 28 times [2021-01-06 09:38:25,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:25,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885215007] [2021-01-06 09:38:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2021-01-06 09:38:25,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885215007] [2021-01-06 09:38:25,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714889704] [2021-01-06 09:38:25,822 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:25,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:25,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:25,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 09:38:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-01-06 09:38:26,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:26,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2021-01-06 09:38:26,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880744063] [2021-01-06 09:38:26,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 09:38:26,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:26,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 09:38:26,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:38:26,110 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand 30 states. [2021-01-06 09:38:26,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:26,364 INFO L93 Difference]: Finished difference Result 239 states and 298 transitions. [2021-01-06 09:38:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 09:38:26,364 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2021-01-06 09:38:26,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:26,365 INFO L225 Difference]: With dead ends: 239 [2021-01-06 09:38:26,365 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 09:38:26,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:38:26,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 09:38:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2021-01-06 09:38:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2021-01-06 09:38:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2021-01-06 09:38:26,371 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 141 [2021-01-06 09:38:26,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:26,371 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2021-01-06 09:38:26,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 09:38:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2021-01-06 09:38:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-01-06 09:38:26,373 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:26,373 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:26,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 09:38:26,589 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:26,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:26,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1299113785, now seen corresponding path program 29 times [2021-01-06 09:38:26,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:26,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181885229] [2021-01-06 09:38:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-01-06 09:38:27,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181885229] [2021-01-06 09:38:27,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737123136] [2021-01-06 09:38:27,186 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:32,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-01-06 09:38:32,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:32,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 09:38:32,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-01-06 09:38:32,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:32,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 09:38:32,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630238182] [2021-01-06 09:38:32,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 09:38:32,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:32,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 09:38:32,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:38:32,663 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 32 states. [2021-01-06 09:38:33,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:33,006 INFO L93 Difference]: Finished difference Result 247 states and 308 transitions. [2021-01-06 09:38:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 09:38:33,008 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 146 [2021-01-06 09:38:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:33,010 INFO L225 Difference]: With dead ends: 247 [2021-01-06 09:38:33,010 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 09:38:33,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:38:33,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 09:38:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-01-06 09:38:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 09:38:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2021-01-06 09:38:33,016 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 146 [2021-01-06 09:38:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:33,016 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2021-01-06 09:38:33,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 09:38:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2021-01-06 09:38:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 09:38:33,017 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:33,018 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:33,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:33,218 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:33,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:33,220 INFO L82 PathProgramCache]: Analyzing trace with hash -689790821, now seen corresponding path program 30 times [2021-01-06 09:38:33,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:33,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210967881] [2021-01-06 09:38:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2021-01-06 09:38:33,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210967881] [2021-01-06 09:38:33,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269728501] [2021-01-06 09:38:33,866 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:39,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2021-01-06 09:38:39,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:39,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 09:38:39,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-01-06 09:38:39,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:39,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2021-01-06 09:38:39,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674781588] [2021-01-06 09:38:39,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 09:38:39,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:39,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 09:38:39,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:38:39,300 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand 32 states. [2021-01-06 09:38:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:39,582 INFO L93 Difference]: Finished difference Result 255 states and 318 transitions. [2021-01-06 09:38:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 09:38:39,583 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 151 [2021-01-06 09:38:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:39,584 INFO L225 Difference]: With dead ends: 255 [2021-01-06 09:38:39,584 INFO L226 Difference]: Without dead ends: 162 [2021-01-06 09:38:39,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:38:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-01-06 09:38:39,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2021-01-06 09:38:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 09:38:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2021-01-06 09:38:39,590 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 151 [2021-01-06 09:38:39,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:39,591 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2021-01-06 09:38:39,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 09:38:39,591 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2021-01-06 09:38:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-01-06 09:38:39,592 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:39,592 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:39,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 09:38:39,807 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:39,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:39,808 INFO L82 PathProgramCache]: Analyzing trace with hash -30028149, now seen corresponding path program 31 times [2021-01-06 09:38:39,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:39,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546786851] [2021-01-06 09:38:39,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-01-06 09:38:40,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546786851] [2021-01-06 09:38:40,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599972709] [2021-01-06 09:38:40,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:40,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 09:38:40,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-01-06 09:38:40,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:40,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 09:38:40,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343511795] [2021-01-06 09:38:40,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 09:38:40,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:40,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 09:38:40,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 09:38:40,807 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand 34 states. [2021-01-06 09:38:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:41,126 INFO L93 Difference]: Finished difference Result 263 states and 328 transitions. [2021-01-06 09:38:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 09:38:41,127 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 156 [2021-01-06 09:38:41,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:41,129 INFO L225 Difference]: With dead ends: 263 [2021-01-06 09:38:41,129 INFO L226 Difference]: Without dead ends: 167 [2021-01-06 09:38:41,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 09:38:41,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-01-06 09:38:41,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2021-01-06 09:38:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 09:38:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2021-01-06 09:38:41,135 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 156 [2021-01-06 09:38:41,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:41,135 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2021-01-06 09:38:41,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 09:38:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2021-01-06 09:38:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 09:38:41,136 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:41,137 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:41,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 09:38:41,349 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:41,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:41,351 INFO L82 PathProgramCache]: Analyzing trace with hash -58052905, now seen corresponding path program 32 times [2021-01-06 09:38:41,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:41,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242008229] [2021-01-06 09:38:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-01-06 09:38:42,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242008229] [2021-01-06 09:38:42,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991318318] [2021-01-06 09:38:42,086 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:42,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:42,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:42,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 09:38:42,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-01-06 09:38:42,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:42,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 09:38:42,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257032012] [2021-01-06 09:38:42,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 09:38:42,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:42,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 09:38:42,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:38:42,372 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand 35 states. [2021-01-06 09:38:42,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:42,682 INFO L93 Difference]: Finished difference Result 271 states and 338 transitions. [2021-01-06 09:38:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 09:38:42,683 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 161 [2021-01-06 09:38:42,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:42,685 INFO L225 Difference]: With dead ends: 271 [2021-01-06 09:38:42,685 INFO L226 Difference]: Without dead ends: 172 [2021-01-06 09:38:42,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:38:42,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-01-06 09:38:42,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2021-01-06 09:38:42,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2021-01-06 09:38:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2021-01-06 09:38:42,690 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 161 [2021-01-06 09:38:42,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:42,691 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2021-01-06 09:38:42,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 09:38:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2021-01-06 09:38:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 09:38:42,692 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:42,692 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:42,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 09:38:42,906 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:42,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1768551345, now seen corresponding path program 33 times [2021-01-06 09:38:42,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:42,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125643982] [2021-01-06 09:38:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-01-06 09:38:43,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125643982] [2021-01-06 09:38:43,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398231078] [2021-01-06 09:38:43,669 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:49,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-01-06 09:38:49,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:49,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 09:38:49,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-01-06 09:38:50,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:50,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 35 [2021-01-06 09:38:50,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070404117] [2021-01-06 09:38:50,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 09:38:50,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:50,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 09:38:50,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:38:50,171 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 35 states. [2021-01-06 09:38:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:50,474 INFO L93 Difference]: Finished difference Result 279 states and 348 transitions. [2021-01-06 09:38:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 09:38:50,480 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 166 [2021-01-06 09:38:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:50,482 INFO L225 Difference]: With dead ends: 279 [2021-01-06 09:38:50,482 INFO L226 Difference]: Without dead ends: 177 [2021-01-06 09:38:50,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:38:50,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-01-06 09:38:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2021-01-06 09:38:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2021-01-06 09:38:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2021-01-06 09:38:50,489 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 166 [2021-01-06 09:38:50,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:50,489 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2021-01-06 09:38:50,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 09:38:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2021-01-06 09:38:50,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-01-06 09:38:50,490 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:50,490 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:50,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 09:38:50,704 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:50,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:50,704 INFO L82 PathProgramCache]: Analyzing trace with hash -374467309, now seen corresponding path program 34 times [2021-01-06 09:38:50,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:50,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965669436] [2021-01-06 09:38:50,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-01-06 09:38:51,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965669436] [2021-01-06 09:38:51,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786895568] [2021-01-06 09:38:51,560 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:51,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:51,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:51,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 09:38:51,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-01-06 09:38:51,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:51,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 09:38:51,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144503581] [2021-01-06 09:38:51,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 09:38:51,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:51,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 09:38:51,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 09:38:51,867 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand 37 states. [2021-01-06 09:38:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:52,257 INFO L93 Difference]: Finished difference Result 287 states and 358 transitions. [2021-01-06 09:38:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 09:38:52,258 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 171 [2021-01-06 09:38:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:52,259 INFO L225 Difference]: With dead ends: 287 [2021-01-06 09:38:52,259 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 09:38:52,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 09:38:52,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 09:38:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2021-01-06 09:38:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 09:38:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2021-01-06 09:38:52,265 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 171 [2021-01-06 09:38:52,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:52,265 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2021-01-06 09:38:52,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 09:38:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2021-01-06 09:38:52,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-01-06 09:38:52,266 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:52,267 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:52,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 09:38:52,480 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2117987821, now seen corresponding path program 35 times [2021-01-06 09:38:52,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:52,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593986226] [2021-01-06 09:38:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2773 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2021-01-06 09:38:53,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593986226] [2021-01-06 09:38:53,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422700056] [2021-01-06 09:38:53,248 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:08,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-01-06 09:39:08,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:08,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 09:39:08,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2773 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2021-01-06 09:39:08,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:08,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 09:39:08,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129977645] [2021-01-06 09:39:08,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 09:39:08,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:08,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 09:39:08,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:39:08,980 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand 38 states. [2021-01-06 09:39:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:09,364 INFO L93 Difference]: Finished difference Result 295 states and 368 transitions. [2021-01-06 09:39:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 09:39:09,365 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 176 [2021-01-06 09:39:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:09,366 INFO L225 Difference]: With dead ends: 295 [2021-01-06 09:39:09,366 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 09:39:09,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:39:09,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 09:39:09,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2021-01-06 09:39:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 09:39:09,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2021-01-06 09:39:09,372 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 176 [2021-01-06 09:39:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:09,372 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2021-01-06 09:39:09,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 09:39:09,373 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2021-01-06 09:39:09,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 09:39:09,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:09,374 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:09,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 09:39:09,575 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:09,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:09,576 INFO L82 PathProgramCache]: Analyzing trace with hash -759295153, now seen corresponding path program 36 times [2021-01-06 09:39:09,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:09,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003698143] [2021-01-06 09:39:09,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2942 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2021-01-06 09:39:10,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003698143] [2021-01-06 09:39:10,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694963322] [2021-01-06 09:39:10,516 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:21,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2021-01-06 09:39:21,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:21,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 09:39:21,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2942 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2021-01-06 09:39:21,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:21,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 09:39:21,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839646848] [2021-01-06 09:39:21,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 09:39:21,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:21,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 09:39:21,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 09:39:21,204 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand 39 states. [2021-01-06 09:39:21,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:21,597 INFO L93 Difference]: Finished difference Result 303 states and 378 transitions. [2021-01-06 09:39:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 09:39:21,598 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 181 [2021-01-06 09:39:21,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:21,599 INFO L225 Difference]: With dead ends: 303 [2021-01-06 09:39:21,599 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 09:39:21,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 09:39:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 09:39:21,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2021-01-06 09:39:21,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-01-06 09:39:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2021-01-06 09:39:21,605 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 181 [2021-01-06 09:39:21,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:21,606 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2021-01-06 09:39:21,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 09:39:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2021-01-06 09:39:21,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-01-06 09:39:21,607 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:21,607 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:21,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 09:39:21,823 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:21,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:21,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1580589097, now seen corresponding path program 37 times [2021-01-06 09:39:21,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:21,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450957650] [2021-01-06 09:39:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2021-01-06 09:39:22,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450957650] [2021-01-06 09:39:22,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905254060] [2021-01-06 09:39:22,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:22,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 09:39:22,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2021-01-06 09:39:23,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:23,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 09:39:23,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256057691] [2021-01-06 09:39:23,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 09:39:23,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:23,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 09:39:23,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 09:39:23,156 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand 40 states. [2021-01-06 09:39:23,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:23,570 INFO L93 Difference]: Finished difference Result 311 states and 388 transitions. [2021-01-06 09:39:23,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 09:39:23,570 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 186 [2021-01-06 09:39:23,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:23,571 INFO L225 Difference]: With dead ends: 311 [2021-01-06 09:39:23,571 INFO L226 Difference]: Without dead ends: 197 [2021-01-06 09:39:23,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 09:39:23,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-01-06 09:39:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2021-01-06 09:39:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2021-01-06 09:39:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2021-01-06 09:39:23,577 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 186 [2021-01-06 09:39:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:23,578 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2021-01-06 09:39:23,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 09:39:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2021-01-06 09:39:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-01-06 09:39:23,579 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:23,579 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:23,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 09:39:23,795 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:23,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:23,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1848240523, now seen corresponding path program 38 times [2021-01-06 09:39:23,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:23,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035811097] [2021-01-06 09:39:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3295 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2021-01-06 09:39:24,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035811097] [2021-01-06 09:39:24,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964634443] [2021-01-06 09:39:24,832 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:25,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:39:25,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:25,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 09:39:25,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3295 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2021-01-06 09:39:25,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:25,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 09:39:25,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718622241] [2021-01-06 09:39:25,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 09:39:25,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:25,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 09:39:25,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 09:39:25,224 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand 41 states. [2021-01-06 09:39:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:25,690 INFO L93 Difference]: Finished difference Result 319 states and 398 transitions. [2021-01-06 09:39:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 09:39:25,691 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 191 [2021-01-06 09:39:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:25,693 INFO L225 Difference]: With dead ends: 319 [2021-01-06 09:39:25,693 INFO L226 Difference]: Without dead ends: 202 [2021-01-06 09:39:25,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 09:39:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-01-06 09:39:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2021-01-06 09:39:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-01-06 09:39:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2021-01-06 09:39:25,700 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 191 [2021-01-06 09:39:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:25,700 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2021-01-06 09:39:25,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 09:39:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2021-01-06 09:39:25,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-01-06 09:39:25,701 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:25,701 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:25,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:25,915 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash -121735781, now seen corresponding path program 39 times [2021-01-06 09:39:25,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:25,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471682661] [2021-01-06 09:39:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-01-06 09:39:27,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471682661] [2021-01-06 09:39:27,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247114900] [2021-01-06 09:39:27,019 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:45,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2021-01-06 09:39:45,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:45,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 139 conjunts are in the unsatisfiable core [2021-01-06 09:39:45,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:45,433 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-01-06 09:39:45,435 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:39:45,441 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:39:45,442 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:39:45,442 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:7 [2021-01-06 09:40:10,690 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-01-06 09:41:47,442 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-01-06 09:41:47,444 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2021-01-06 09:41:47,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:41:47,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-01-06 09:41:47,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389703557] [2021-01-06 09:41:47,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 09:41:47,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:41:47,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 09:41:47,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1416, Invalid=3270, Unknown=6, NotChecked=0, Total=4692 [2021-01-06 09:41:47,446 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand 41 states. [2021-01-06 09:41:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 09:41:47,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:41:47,649 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1da2ceb2 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:62) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-01-06 09:41:47,654 INFO L168 Benchmark]: Toolchain (without parser) took 231060.75 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 125.7 MB in the beginning and 272.1 MB in the end (delta: -146.4 MB). Peak memory consumption was 18.7 MB. Max. memory is 8.0 GB. [2021-01-06 09:41:47,655 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 09:41:47,655 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.00 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 115.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 09:41:47,656 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.51 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 09:41:47,656 INFO L168 Benchmark]: Boogie Preprocessor took 65.38 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 113.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 09:41:47,656 INFO L168 Benchmark]: RCFGBuilder took 617.57 ms. Allocated memory is still 151.0 MB. Free memory was 113.0 MB in the beginning and 131.6 MB in the end (delta: -18.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. [2021-01-06 09:41:47,657 INFO L168 Benchmark]: TraceAbstraction took 229975.11 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 131.1 MB in the beginning and 272.1 MB in the end (delta: -140.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 8.0 GB. [2021-01-06 09:41:47,659 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 335.00 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 115.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 57.51 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.38 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 113.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 617.57 ms. Allocated memory is still 151.0 MB. Free memory was 113.0 MB in the beginning and 131.6 MB in the end (delta: -18.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 229975.11 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 131.1 MB in the beginning and 272.1 MB in the end (delta: -140.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1da2ceb2 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1da2ceb2: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...