/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:56:33,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:56:33,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:56:33,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:56:33,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:56:33,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:56:33,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:56:33,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:56:33,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:56:33,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:56:33,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:56:33,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:56:33,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:56:33,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:56:33,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:56:33,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:56:33,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:56:33,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:56:33,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:56:33,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:56:33,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:56:33,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:56:33,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:56:33,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:56:33,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 09:56:33,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 09:56:33,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 09:56:33,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 09:56:33,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 09:56:33,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 09:56:33,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:56:33,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:56:33,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:56:33,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:56:33,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:56:33,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:56:33,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:56:33,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:56:33,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:56:33,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:56:33,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:56:33,951 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 09:56:34,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:56:34,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:56:34,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:56:34,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:56:34,008 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:56:34,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:56:34,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:56:34,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:56:34,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:56:34,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:56:34,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:56:34,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:56:34,012 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:56:34,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:56:34,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:56:34,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:56:34,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:56:34,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:56:34,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:56:34,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:56:34,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:56:34,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:56:34,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:56:34,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:56:34,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:56:34,015 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:56:34,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:56:34,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:56:34,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:56:34,554 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:56:34,555 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:56:34,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i [2021-01-06 09:56:34,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f543362ea/f67bdafa84034192a36368b1f5198132/FLAG575e230da [2021-01-06 09:56:35,367 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:56:35,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i [2021-01-06 09:56:35,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f543362ea/f67bdafa84034192a36368b1f5198132/FLAG575e230da [2021-01-06 09:56:35,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f543362ea/f67bdafa84034192a36368b1f5198132 [2021-01-06 09:56:35,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:56:35,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:56:35,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:56:35,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:56:35,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:56:35,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:56:35" (1/1) ... [2021-01-06 09:56:35,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3e4a57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:35, skipping insertion in model container [2021-01-06 09:56:35,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:56:35" (1/1) ... [2021-01-06 09:56:35,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:56:35,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:56:35,903 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i[821,834] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~min~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:56:35,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:56:35,936 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:56:35,954 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i[821,834] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~min~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:56:35,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:56:35,983 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:56:35,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:35 WrapperNode [2021-01-06 09:56:35,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:56:35,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:56:35,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:56:35,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:56:35,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:35" (1/1) ... [2021-01-06 09:56:36,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:35" (1/1) ... [2021-01-06 09:56:36,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:56:36,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:56:36,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:56:36,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:56:36,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:35" (1/1) ... [2021-01-06 09:56:36,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:35" (1/1) ... [2021-01-06 09:56:36,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:35" (1/1) ... [2021-01-06 09:56:36,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:35" (1/1) ... [2021-01-06 09:56:36,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:35" (1/1) ... [2021-01-06 09:56:36,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:35" (1/1) ... [2021-01-06 09:56:36,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:35" (1/1) ... [2021-01-06 09:56:36,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:56:36,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:56:36,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:56:36,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:56:36,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:35" (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 09:56:36,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:56:36,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:56:36,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:56:36,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:56:36,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:56:36,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:56:36,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:56:36,688 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:56:36,689 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 09:56:36,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:56:36 BoogieIcfgContainer [2021-01-06 09:56:36,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:56:36,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:56:36,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:56:36,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:56:36,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:56:35" (1/3) ... [2021-01-06 09:56:36,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f88126c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:56:36, skipping insertion in model container [2021-01-06 09:56:36,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:35" (2/3) ... [2021-01-06 09:56:36,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f88126c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:56:36, skipping insertion in model container [2021-01-06 09:56:36,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:56:36" (3/3) ... [2021-01-06 09:56:36,724 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-1.i [2021-01-06 09:56:36,743 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:56:36,758 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:56:36,801 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:56:36,833 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:56:36,834 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:56:36,834 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:56:36,834 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:56:36,834 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:56:36,834 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:56:36,878 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:56:36,879 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:56:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-01-06 09:56:36,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 09:56:36,951 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:36,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:36,955 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:36,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2005182879, now seen corresponding path program 1 times [2021-01-06 09:56:36,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:36,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997575295] [2021-01-06 09:56:36,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:37,150 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 09:56:37,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997575295] [2021-01-06 09:56:37,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:56:37,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 09:56:37,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660972824] [2021-01-06 09:56:37,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 09:56:37,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:37,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 09:56:37,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 09:56:37,180 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2021-01-06 09:56:37,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:37,206 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-01-06 09:56:37,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 09:56:37,208 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 09:56:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:37,221 INFO L225 Difference]: With dead ends: 34 [2021-01-06 09:56:37,221 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 09:56:37,225 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 09:56:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 09:56:37,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 09:56:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 09:56:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-01-06 09:56:37,267 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2021-01-06 09:56:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:37,268 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-01-06 09:56:37,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 09:56:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-01-06 09:56:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 09:56:37,269 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:37,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:37,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:56:37,270 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:37,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2015341610, now seen corresponding path program 1 times [2021-01-06 09:56:37,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:37,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073432590] [2021-01-06 09:56:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:37,339 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 09:56:37,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073432590] [2021-01-06 09:56:37,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:56:37,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:56:37,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465048127] [2021-01-06 09:56:37,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:56:37,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:37,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:56:37,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:56:37,344 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2021-01-06 09:56:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:37,366 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-01-06 09:56:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:56:37,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 09:56:37,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:37,369 INFO L225 Difference]: With dead ends: 28 [2021-01-06 09:56:37,369 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 09:56:37,370 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 09:56:37,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 09:56:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-01-06 09:56:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 09:56:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-01-06 09:56:37,375 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-01-06 09:56:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:37,376 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-01-06 09:56:37,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:56:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-01-06 09:56:37,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 09:56:37,377 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:37,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:37,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 09:56:37,377 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:37,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1565753620, now seen corresponding path program 1 times [2021-01-06 09:56:37,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:37,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221914676] [2021-01-06 09:56:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:37,437 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 09:56:37,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221914676] [2021-01-06 09:56:37,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718807731] [2021-01-06 09:56:37,438 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 09:56:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:37,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:56:37,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:37,557 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 09:56:37,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:56:37,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:56:37,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384035044] [2021-01-06 09:56:37,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:56:37,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:37,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:56:37,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:56:37,567 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2021-01-06 09:56:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:37,596 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-01-06 09:56:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:56:37,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 09:56:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:37,598 INFO L225 Difference]: With dead ends: 26 [2021-01-06 09:56:37,598 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 09:56:37,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:56:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 09:56:37,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-01-06 09:56:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 09:56:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-01-06 09:56:37,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2021-01-06 09:56:37,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:37,603 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-01-06 09:56:37,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:56:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-01-06 09:56:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 09:56:37,604 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:37,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:37,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 09:56:37,819 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1959207727, now seen corresponding path program 1 times [2021-01-06 09:56:37,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:37,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943560768] [2021-01-06 09:56:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:37,868 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 09:56:37,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943560768] [2021-01-06 09:56:37,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304996464] [2021-01-06 09:56:37,869 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 09:56:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:37,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:56:37,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:38,000 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 09:56:38,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:38,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:56:38,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555117562] [2021-01-06 09:56:38,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:56:38,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:38,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:56:38,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:56:38,004 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2021-01-06 09:56:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:38,031 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-01-06 09:56:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:56:38,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 09:56:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:38,033 INFO L225 Difference]: With dead ends: 32 [2021-01-06 09:56:38,033 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 09:56:38,034 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 09:56:38,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 09:56:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-01-06 09:56:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 09:56:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-01-06 09:56:38,039 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2021-01-06 09:56:38,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:38,040 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-01-06 09:56:38,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:56:38,040 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-01-06 09:56:38,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 09:56:38,041 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:38,041 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:38,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:38,255 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:38,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1501972051, now seen corresponding path program 2 times [2021-01-06 09:56:38,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:38,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076285920] [2021-01-06 09:56:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:38,391 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 09:56:38,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076285920] [2021-01-06 09:56:38,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420191715] [2021-01-06 09:56:38,393 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 09:56:38,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:56:38,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:38,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:56:38,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:38,561 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 09:56:38,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:38,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 09:56:38,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780811011] [2021-01-06 09:56:38,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:56:38,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:38,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:56:38,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:56:38,566 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2021-01-06 09:56:38,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:38,637 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-01-06 09:56:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:56:38,638 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-01-06 09:56:38,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:38,639 INFO L225 Difference]: With dead ends: 39 [2021-01-06 09:56:38,639 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 09:56:38,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:56:38,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 09:56:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-01-06 09:56:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:56:38,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 09:56:38,647 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-01-06 09:56:38,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:38,647 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 09:56:38,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:56:38,647 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 09:56:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:56:38,649 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:38,649 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:38,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:38,863 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:38,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1207096048, now seen corresponding path program 3 times [2021-01-06 09:56:38,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:38,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28233457] [2021-01-06 09:56:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 09:56:38,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28233457] [2021-01-06 09:56:38,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951892795] [2021-01-06 09:56:38,941 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 09:56:39,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:56:39,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:39,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:56:39,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:39,081 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 09:56:39,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:39,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-01-06 09:56:39,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927703271] [2021-01-06 09:56:39,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:56:39,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:39,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:56:39,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:56:39,084 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 9 states. [2021-01-06 09:56:39,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:39,144 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-01-06 09:56:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:56:39,145 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2021-01-06 09:56:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:39,146 INFO L225 Difference]: With dead ends: 47 [2021-01-06 09:56:39,146 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:56:39,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:56:39,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:56:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-01-06 09:56:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 09:56:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-01-06 09:56:39,154 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 21 [2021-01-06 09:56:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:39,154 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-01-06 09:56:39,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:56:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-01-06 09:56:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 09:56:39,155 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:39,156 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:39,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:39,358 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:39,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1223744631, now seen corresponding path program 4 times [2021-01-06 09:56:39,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:39,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560117735] [2021-01-06 09:56:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:39,442 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 09:56:39,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560117735] [2021-01-06 09:56:39,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041244082] [2021-01-06 09:56:39,443 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 09:56:39,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:56:39,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:39,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:56:39,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:39,555 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 09:56:39,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:39,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:56:39,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081946372] [2021-01-06 09:56:39,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:56:39,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:39,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:56:39,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:56:39,559 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 8 states. [2021-01-06 09:56:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:39,592 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-01-06 09:56:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:56:39,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2021-01-06 09:56:39,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:39,593 INFO L225 Difference]: With dead ends: 50 [2021-01-06 09:56:39,593 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:56:39,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:56:39,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:56:39,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-01-06 09:56:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 09:56:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 09:56:39,600 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 26 [2021-01-06 09:56:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:39,600 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 09:56:39,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:56:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 09:56:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 09:56:39,601 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:39,602 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:39,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 09:56:39,818 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:39,820 INFO L82 PathProgramCache]: Analyzing trace with hash -403565831, now seen corresponding path program 5 times [2021-01-06 09:56:39,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:39,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916022974] [2021-01-06 09:56:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:56:39,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916022974] [2021-01-06 09:56:39,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082358482] [2021-01-06 09:56:39,925 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 09:56:40,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 09:56:40,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:40,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:56:40,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 09:56:40,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:40,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-01-06 09:56:40,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030614107] [2021-01-06 09:56:40,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:56:40,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:40,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:56:40,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:56:40,132 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 12 states. [2021-01-06 09:56:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:40,205 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2021-01-06 09:56:40,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:56:40,206 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2021-01-06 09:56:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:40,207 INFO L225 Difference]: With dead ends: 57 [2021-01-06 09:56:40,207 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 09:56:40,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:56:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 09:56:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-01-06 09:56:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 09:56:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-01-06 09:56:40,213 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 28 [2021-01-06 09:56:40,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:40,214 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-01-06 09:56:40,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:56:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-01-06 09:56:40,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 09:56:40,215 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:40,215 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:40,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:40,430 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:40,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:40,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1934839690, now seen corresponding path program 6 times [2021-01-06 09:56:40,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:40,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671974129] [2021-01-06 09:56:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 09:56:40,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671974129] [2021-01-06 09:56:40,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519510085] [2021-01-06 09:56:40,538 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 09:56:40,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:56:40,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:40,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:56:40,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:56:40,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:40,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-01-06 09:56:40,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222399298] [2021-01-06 09:56:40,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:56:40,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:40,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:56:40,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:56:40,764 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 14 states. [2021-01-06 09:56:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:40,842 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2021-01-06 09:56:40,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:56:40,843 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2021-01-06 09:56:40,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:40,844 INFO L225 Difference]: With dead ends: 65 [2021-01-06 09:56:40,844 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 09:56:40,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:56:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 09:56:40,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-01-06 09:56:40,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 09:56:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-01-06 09:56:40,851 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 33 [2021-01-06 09:56:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:40,851 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-01-06 09:56:40,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:56:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-01-06 09:56:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 09:56:40,853 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:40,853 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:41,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:41,067 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:41,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:41,068 INFO L82 PathProgramCache]: Analyzing trace with hash 172781213, now seen corresponding path program 7 times [2021-01-06 09:56:41,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:41,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007694573] [2021-01-06 09:56:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 09:56:41,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007694573] [2021-01-06 09:56:41,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053307825] [2021-01-06 09:56:41,174 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 09:56:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:41,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:56:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 09:56:41,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:41,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:56:41,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037203227] [2021-01-06 09:56:41,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:56:41,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:41,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:56:41,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:56:41,349 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 11 states. [2021-01-06 09:56:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:41,407 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2021-01-06 09:56:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:56:41,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2021-01-06 09:56:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:41,412 INFO L225 Difference]: With dead ends: 68 [2021-01-06 09:56:41,413 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 09:56:41,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 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 09:56:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 09:56:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-01-06 09:56:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 09:56:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-01-06 09:56:41,432 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 38 [2021-01-06 09:56:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:41,434 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-01-06 09:56:41,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:56:41,434 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-01-06 09:56:41,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 09:56:41,435 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:41,436 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:41,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 09:56:41,655 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:41,656 INFO L82 PathProgramCache]: Analyzing trace with hash -239734241, now seen corresponding path program 8 times [2021-01-06 09:56:41,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:41,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257340896] [2021-01-06 09:56:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 09:56:41,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257340896] [2021-01-06 09:56:41,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334770435] [2021-01-06 09:56:41,810 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 09:56:41,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:56:41,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:41,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:56:41,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 09:56:41,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:41,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:56:41,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69861648] [2021-01-06 09:56:41,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:56:41,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:41,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:56:41,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:56:41,962 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 12 states. [2021-01-06 09:56:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:42,002 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-01-06 09:56:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:56:42,004 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2021-01-06 09:56:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:42,004 INFO L225 Difference]: With dead ends: 70 [2021-01-06 09:56:42,007 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 09:56:42,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:56:42,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 09:56:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-01-06 09:56:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 09:56:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-01-06 09:56:42,013 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 40 [2021-01-06 09:56:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:42,013 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-01-06 09:56:42,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:56:42,013 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-01-06 09:56:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 09:56:42,014 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:42,014 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:42,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:42,230 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:42,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1530094303, now seen corresponding path program 9 times [2021-01-06 09:56:42,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:42,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412497866] [2021-01-06 09:56:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 09:56:42,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412497866] [2021-01-06 09:56:42,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895016318] [2021-01-06 09:56:42,387 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 09:56:42,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:56:42,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:42,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:56:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:56:42,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:42,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-01-06 09:56:42,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854846297] [2021-01-06 09:56:42,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:56:42,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:42,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:56:42,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:56:42,610 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 18 states. [2021-01-06 09:56:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:42,723 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2021-01-06 09:56:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:56:42,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2021-01-06 09:56:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:42,724 INFO L225 Difference]: With dead ends: 77 [2021-01-06 09:56:42,724 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 09:56:42,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:56:42,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 09:56:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-01-06 09:56:42,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 09:56:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-01-06 09:56:42,730 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 42 [2021-01-06 09:56:42,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:42,730 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-01-06 09:56:42,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:56:42,730 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-01-06 09:56:42,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 09:56:42,731 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:42,731 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:42,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:42,947 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:42,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:42,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1935274014, now seen corresponding path program 10 times [2021-01-06 09:56:42,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:42,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83840102] [2021-01-06 09:56:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 09:56:43,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83840102] [2021-01-06 09:56:43,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510136433] [2021-01-06 09:56:43,174 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 09:56:43,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:56:43,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:43,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:56:43,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 09:56:43,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:43,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:56:43,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861858904] [2021-01-06 09:56:43,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:56:43,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:43,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:56:43,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:56:43,385 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 14 states. [2021-01-06 09:56:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:43,454 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2021-01-06 09:56:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:56:43,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2021-01-06 09:56:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:43,456 INFO L225 Difference]: With dead ends: 80 [2021-01-06 09:56:43,456 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 09:56:43,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:56:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 09:56:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-01-06 09:56:43,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 09:56:43,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-01-06 09:56:43,461 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 47 [2021-01-06 09:56:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:43,461 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-01-06 09:56:43,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:56:43,462 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-01-06 09:56:43,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 09:56:43,462 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:43,463 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:43,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:56:43,679 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:43,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:43,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1920246112, now seen corresponding path program 11 times [2021-01-06 09:56:43,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:43,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265949821] [2021-01-06 09:56:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 09:56:43,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265949821] [2021-01-06 09:56:43,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488954428] [2021-01-06 09:56:43,853 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 09:56:44,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 09:56:44,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:44,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:56:44,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 09:56:44,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:44,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:56:44,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514372967] [2021-01-06 09:56:44,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:56:44,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:44,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:56:44,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:56:44,083 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 15 states. [2021-01-06 09:56:44,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:44,135 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-01-06 09:56:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:56:44,136 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2021-01-06 09:56:44,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:44,136 INFO L225 Difference]: With dead ends: 82 [2021-01-06 09:56:44,136 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 09:56:44,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 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 09:56:44,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 09:56:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-01-06 09:56:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 09:56:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-01-06 09:56:44,142 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 49 [2021-01-06 09:56:44,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:44,142 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-01-06 09:56:44,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:56:44,142 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-01-06 09:56:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 09:56:44,143 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:44,143 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:44,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:56:44,357 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:44,358 INFO L82 PathProgramCache]: Analyzing trace with hash -363334178, now seen corresponding path program 12 times [2021-01-06 09:56:44,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:44,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162620983] [2021-01-06 09:56:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 09:56:44,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162620983] [2021-01-06 09:56:44,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049192881] [2021-01-06 09:56:44,537 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 09:56:44,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 09:56:44,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:56:44,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 09:56:44,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:44,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-01-06 09:56:44,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303286839] [2021-01-06 09:56:44,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 09:56:44,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:45,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 09:56:45,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-01-06 09:56:45,000 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 22 states. [2021-01-06 09:56:45,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:45,143 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2021-01-06 09:56:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:56:45,143 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2021-01-06 09:56:45,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:45,144 INFO L225 Difference]: With dead ends: 89 [2021-01-06 09:56:45,145 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 09:56:45,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-01-06 09:56:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 09:56:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-01-06 09:56:45,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 09:56:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2021-01-06 09:56:45,150 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 51 [2021-01-06 09:56:45,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:45,150 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2021-01-06 09:56:45,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 09:56:45,150 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2021-01-06 09:56:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 09:56:45,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:45,151 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:45,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 09:56:45,366 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:45,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1122895031, now seen corresponding path program 13 times [2021-01-06 09:56:45,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:45,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433030683] [2021-01-06 09:56:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 09:56:45,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433030683] [2021-01-06 09:56:45,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8326381] [2021-01-06 09:56:45,556 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 09:56:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:45,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:56:45,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 09:56:45,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:45,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:56:45,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129174730] [2021-01-06 09:56:45,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:56:45,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:45,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:56:45,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:56:45,711 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 17 states. [2021-01-06 09:56:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:45,772 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2021-01-06 09:56:45,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:56:45,772 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 56 [2021-01-06 09:56:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:45,773 INFO L225 Difference]: With dead ends: 92 [2021-01-06 09:56:45,773 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 09:56:45,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 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 09:56:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 09:56:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-01-06 09:56:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 09:56:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-01-06 09:56:45,778 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 56 [2021-01-06 09:56:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:45,779 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-01-06 09:56:45,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:56:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-01-06 09:56:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 09:56:45,780 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:45,780 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:45,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:45,994 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:45,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:45,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1664720309, now seen corresponding path program 14 times [2021-01-06 09:56:45,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:45,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087523761] [2021-01-06 09:56:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 09:56:46,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087523761] [2021-01-06 09:56:46,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151406279] [2021-01-06 09:56:46,248 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 09:56:46,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:56:46,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:46,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:56:46,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 09:56:46,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:46,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:56:46,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173328261] [2021-01-06 09:56:46,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:56:46,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:46,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:56:46,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:56:46,437 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 18 states. [2021-01-06 09:56:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:46,503 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2021-01-06 09:56:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:56:46,503 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2021-01-06 09:56:46,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:46,504 INFO L225 Difference]: With dead ends: 94 [2021-01-06 09:56:46,504 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 09:56:46,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:56:46,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 09:56:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-01-06 09:56:46,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 09:56:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-01-06 09:56:46,509 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 58 [2021-01-06 09:56:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:46,510 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-01-06 09:56:46,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:56:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-01-06 09:56:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 09:56:46,511 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:46,511 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:46,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:56:46,725 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:46,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1627197645, now seen corresponding path program 15 times [2021-01-06 09:56:46,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:46,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754056454] [2021-01-06 09:56:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 09:56:46,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754056454] [2021-01-06 09:56:46,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555942813] [2021-01-06 09:56:46,964 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 09:56:47,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 09:56:47,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:47,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:56:47,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 09:56:47,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:47,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2021-01-06 09:56:47,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396011822] [2021-01-06 09:56:47,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 09:56:47,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:47,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 09:56:47,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:56:47,281 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 26 states. [2021-01-06 09:56:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:47,414 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2021-01-06 09:56:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 09:56:47,415 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2021-01-06 09:56:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:47,416 INFO L225 Difference]: With dead ends: 101 [2021-01-06 09:56:47,416 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 09:56:47,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:56:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 09:56:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-01-06 09:56:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 09:56:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-01-06 09:56:47,421 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 60 [2021-01-06 09:56:47,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:47,421 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-01-06 09:56:47,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 09:56:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-01-06 09:56:47,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 09:56:47,422 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:47,422 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:47,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 09:56:47,636 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:47,637 INFO L82 PathProgramCache]: Analyzing trace with hash -220128970, now seen corresponding path program 16 times [2021-01-06 09:56:47,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:47,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307019761] [2021-01-06 09:56:47,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 09:56:47,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307019761] [2021-01-06 09:56:47,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593927864] [2021-01-06 09:56:47,990 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 09:56:48,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:56:48,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:48,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:56:48,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 09:56:48,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:48,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:56:48,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494558039] [2021-01-06 09:56:48,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:56:48,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:48,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:56:48,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:56:48,190 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 20 states. [2021-01-06 09:56:48,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:48,282 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2021-01-06 09:56:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:56:48,283 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2021-01-06 09:56:48,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:48,283 INFO L225 Difference]: With dead ends: 104 [2021-01-06 09:56:48,283 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 09:56:48,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:56:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 09:56:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-01-06 09:56:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 09:56:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2021-01-06 09:56:48,291 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 65 [2021-01-06 09:56:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:48,292 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2021-01-06 09:56:48,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:56:48,292 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2021-01-06 09:56:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 09:56:48,292 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:48,292 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:48,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:48,501 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash -222071692, now seen corresponding path program 17 times [2021-01-06 09:56:48,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:48,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8133508] [2021-01-06 09:56:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 09:56:48,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8133508] [2021-01-06 09:56:48,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793358844] [2021-01-06 09:56:48,801 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 09:56:49,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 09:56:49,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:49,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 09:56:49,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 09:56:49,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:49,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 09:56:49,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993301857] [2021-01-06 09:56:49,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:56:49,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:56:49,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:56:49,186 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 21 states. [2021-01-06 09:56:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:49,259 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2021-01-06 09:56:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 09:56:49,260 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2021-01-06 09:56:49,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:49,261 INFO L225 Difference]: With dead ends: 106 [2021-01-06 09:56:49,261 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 09:56:49,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 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 09:56:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 09:56:49,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-01-06 09:56:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 09:56:49,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-01-06 09:56:49,265 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 67 [2021-01-06 09:56:49,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:49,266 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-01-06 09:56:49,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:56:49,266 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-01-06 09:56:49,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 09:56:49,266 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:49,266 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:49,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:49,482 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:49,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:49,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2089027534, now seen corresponding path program 18 times [2021-01-06 09:56:49,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:49,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733265630] [2021-01-06 09:56:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 09:56:49,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733265630] [2021-01-06 09:56:49,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106541055] [2021-01-06 09:56:49,846 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 09:56:50,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 09:56:50,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:50,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:56:50,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 09:56:50,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:50,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2021-01-06 09:56:50,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336411541] [2021-01-06 09:56:50,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 09:56:50,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:50,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 09:56:50,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:56:50,588 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 30 states. [2021-01-06 09:56:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:50,788 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2021-01-06 09:56:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 09:56:50,788 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2021-01-06 09:56:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:50,789 INFO L225 Difference]: With dead ends: 113 [2021-01-06 09:56:50,789 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 09:56:50,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:56:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 09:56:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-01-06 09:56:50,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 09:56:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2021-01-06 09:56:50,795 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 69 [2021-01-06 09:56:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:50,795 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2021-01-06 09:56:50,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 09:56:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2021-01-06 09:56:50,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 09:56:50,796 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:50,796 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:51,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:51,010 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:51,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:51,011 INFO L82 PathProgramCache]: Analyzing trace with hash -74396683, now seen corresponding path program 19 times [2021-01-06 09:56:51,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:51,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454856286] [2021-01-06 09:56:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 09:56:51,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454856286] [2021-01-06 09:56:51,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554641794] [2021-01-06 09:56:51,357 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 09:56:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:51,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:56:51,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 09:56:51,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:51,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 09:56:51,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924756526] [2021-01-06 09:56:51,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:56:51,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:51,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:56:51,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:56:51,597 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 23 states. [2021-01-06 09:56:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:51,678 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2021-01-06 09:56:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:56:51,679 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 74 [2021-01-06 09:56:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:51,680 INFO L225 Difference]: With dead ends: 116 [2021-01-06 09:56:51,680 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 09:56:51,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 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 09:56:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 09:56:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-01-06 09:56:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 09:56:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-01-06 09:56:51,685 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 74 [2021-01-06 09:56:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:51,685 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-01-06 09:56:51,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:56:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-01-06 09:56:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 09:56:51,686 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:51,686 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:51,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 09:56:51,900 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:51,901 INFO L82 PathProgramCache]: Analyzing trace with hash -17942921, now seen corresponding path program 20 times [2021-01-06 09:56:51,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:51,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133093968] [2021-01-06 09:56:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 09:56:52,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133093968] [2021-01-06 09:56:52,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819928003] [2021-01-06 09:56:52,241 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 09:56:52,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:56:52,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:52,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:56:52,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 09:56:52,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:52,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 09:56:52,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370481780] [2021-01-06 09:56:52,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:56:52,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:52,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:56:52,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:56:52,443 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 24 states. [2021-01-06 09:56:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:52,543 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2021-01-06 09:56:52,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 09:56:52,544 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2021-01-06 09:56:52,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:52,545 INFO L225 Difference]: With dead ends: 118 [2021-01-06 09:56:52,545 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 09:56:52,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:56:52,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 09:56:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-01-06 09:56:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 09:56:52,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2021-01-06 09:56:52,551 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 76 [2021-01-06 09:56:52,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:52,552 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2021-01-06 09:56:52,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:56:52,552 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2021-01-06 09:56:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 09:56:52,552 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:52,553 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:52,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 09:56:52,759 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:52,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1600452487, now seen corresponding path program 21 times [2021-01-06 09:56:52,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:52,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291327098] [2021-01-06 09:56:52,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 09:56:53,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291327098] [2021-01-06 09:56:53,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409945925] [2021-01-06 09:56:53,156 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 09:56:53,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 09:56:53,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:53,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:56:53,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 09:56:53,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:53,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12] total 34 [2021-01-06 09:56:53,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556169253] [2021-01-06 09:56:53,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 09:56:53,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:53,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 09:56:53,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 09:56:53,580 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 34 states. [2021-01-06 09:56:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:53,783 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2021-01-06 09:56:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 09:56:53,783 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2021-01-06 09:56:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:53,785 INFO L225 Difference]: With dead ends: 125 [2021-01-06 09:56:53,785 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 09:56:53,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 09:56:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 09:56:53,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2021-01-06 09:56:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 09:56:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2021-01-06 09:56:53,793 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 78 [2021-01-06 09:56:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:53,793 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2021-01-06 09:56:53,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 09:56:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2021-01-06 09:56:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 09:56:53,794 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:53,794 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:54,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:54,004 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:54,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:54,005 INFO L82 PathProgramCache]: Analyzing trace with hash -754057590, now seen corresponding path program 22 times [2021-01-06 09:56:54,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:54,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285225474] [2021-01-06 09:56:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 09:56:54,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285225474] [2021-01-06 09:56:54,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603248275] [2021-01-06 09:56:54,481 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 09:56:54,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:56:54,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:54,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:56:54,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 09:56:54,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:54,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2021-01-06 09:56:54,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744487714] [2021-01-06 09:56:54,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 09:56:54,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:54,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 09:56:54,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:56:54,953 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 36 states. [2021-01-06 09:56:55,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:55,164 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2021-01-06 09:56:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 09:56:55,165 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 83 [2021-01-06 09:56:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:55,166 INFO L225 Difference]: With dead ends: 133 [2021-01-06 09:56:55,166 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 09:56:55,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:56:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 09:56:55,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-01-06 09:56:55,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 09:56:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2021-01-06 09:56:55,171 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 83 [2021-01-06 09:56:55,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:55,171 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2021-01-06 09:56:55,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 09:56:55,172 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2021-01-06 09:56:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 09:56:55,172 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:55,172 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:55,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 09:56:55,387 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:55,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:55,388 INFO L82 PathProgramCache]: Analyzing trace with hash -77685987, now seen corresponding path program 23 times [2021-01-06 09:56:55,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:55,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957822430] [2021-01-06 09:56:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-01-06 09:56:55,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957822430] [2021-01-06 09:56:55,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116389053] [2021-01-06 09:56:55,800 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 09:56:56,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 09:56:56,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:56,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:56:56,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 09:56:56,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:56,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2021-01-06 09:56:56,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750723649] [2021-01-06 09:56:56,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 09:56:56,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:56,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 09:56:56,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:56:56,822 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand 38 states. [2021-01-06 09:56:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:57,033 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2021-01-06 09:56:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 09:56:57,034 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 88 [2021-01-06 09:56:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:57,035 INFO L225 Difference]: With dead ends: 141 [2021-01-06 09:56:57,035 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 09:56:57,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:56:57,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 09:56:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-01-06 09:56:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 09:56:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2021-01-06 09:56:57,040 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 88 [2021-01-06 09:56:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:57,041 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2021-01-06 09:56:57,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 09:56:57,041 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2021-01-06 09:56:57,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 09:56:57,042 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:57,042 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:57,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:57,254 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:57,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash -182696986, now seen corresponding path program 24 times [2021-01-06 09:56:57,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:57,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062497623] [2021-01-06 09:56:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 09:56:57,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062497623] [2021-01-06 09:56:57,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143929891] [2021-01-06 09:56:57,700 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 09:56:58,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 09:56:58,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:58,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 09:56:58,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 09:56:59,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:59,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 09:56:59,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299969399] [2021-01-06 09:56:59,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 09:56:59,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:59,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 09:56:59,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 09:56:59,077 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 28 states. [2021-01-06 09:56:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:59,167 INFO L93 Difference]: Finished difference Result 144 states and 172 transitions. [2021-01-06 09:56:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 09:56:59,167 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 93 [2021-01-06 09:56:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:59,168 INFO L225 Difference]: With dead ends: 144 [2021-01-06 09:56:59,168 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 09:56:59,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 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 09:56:59,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 09:56:59,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-01-06 09:56:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 09:56:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2021-01-06 09:56:59,172 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 93 [2021-01-06 09:56:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:59,173 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2021-01-06 09:56:59,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 09:56:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2021-01-06 09:56:59,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 09:56:59,174 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:59,174 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:59,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 09:56:59,385 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1785629148, now seen corresponding path program 25 times [2021-01-06 09:56:59,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:59,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941309396] [2021-01-06 09:56:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 09:56:59,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941309396] [2021-01-06 09:56:59,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737849305] [2021-01-06 09:56:59,905 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 09:56:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:59,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 09:56:59,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 09:57:00,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:00,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 09:57:00,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435122372] [2021-01-06 09:57:00,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:57:00,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:00,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:57:00,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:57:00,120 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 29 states. [2021-01-06 09:57:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:00,219 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2021-01-06 09:57:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 09:57:00,220 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2021-01-06 09:57:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:00,221 INFO L225 Difference]: With dead ends: 146 [2021-01-06 09:57:00,222 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 09:57:00,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 95 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 09:57:00,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 09:57:00,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-01-06 09:57:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 09:57:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2021-01-06 09:57:00,227 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 95 [2021-01-06 09:57:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:00,227 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2021-01-06 09:57:00,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:57:00,228 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2021-01-06 09:57:00,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 09:57:00,229 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:00,229 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:00,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 09:57:00,444 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:00,444 INFO L82 PathProgramCache]: Analyzing trace with hash -310177566, now seen corresponding path program 26 times [2021-01-06 09:57:00,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:00,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526866098] [2021-01-06 09:57:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 09:57:00,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526866098] [2021-01-06 09:57:00,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616887419] [2021-01-06 09:57:00,961 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 09:57:01,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:01,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:01,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 09:57:01,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 09:57:01,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:01,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 09:57:01,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44770549] [2021-01-06 09:57:01,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 09:57:01,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:01,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 09:57:01,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:57:01,179 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 30 states. [2021-01-06 09:57:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:01,291 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2021-01-06 09:57:01,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 09:57:01,294 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 97 [2021-01-06 09:57:01,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:01,295 INFO L225 Difference]: With dead ends: 148 [2021-01-06 09:57:01,296 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 09:57:01,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:57:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 09:57:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-01-06 09:57:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 09:57:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2021-01-06 09:57:01,301 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 97 [2021-01-06 09:57:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:01,301 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2021-01-06 09:57:01,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 09:57:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2021-01-06 09:57:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 09:57:01,302 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:01,302 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:01,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 09:57:01,517 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:01,517 INFO L82 PathProgramCache]: Analyzing trace with hash 259585056, now seen corresponding path program 27 times [2021-01-06 09:57:01,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:01,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705695327] [2021-01-06 09:57:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 09:57:02,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705695327] [2021-01-06 09:57:02,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982306119] [2021-01-06 09:57:02,065 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 09:57:02,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-01-06 09:57:02,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:02,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:57:02,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-01-06 09:57:02,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:02,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15] total 43 [2021-01-06 09:57:02,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983580366] [2021-01-06 09:57:02,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 09:57:02,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 09:57:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 09:57:02,628 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand 43 states. [2021-01-06 09:57:02,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:02,844 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2021-01-06 09:57:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 09:57:02,844 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 99 [2021-01-06 09:57:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:02,845 INFO L225 Difference]: With dead ends: 155 [2021-01-06 09:57:02,845 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 09:57:02,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 09:57:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 09:57:02,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-01-06 09:57:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 09:57:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2021-01-06 09:57:02,850 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 99 [2021-01-06 09:57:02,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:02,851 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2021-01-06 09:57:02,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 09:57:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2021-01-06 09:57:02,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 09:57:02,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:02,852 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:03,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:03,068 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:03,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:03,069 INFO L82 PathProgramCache]: Analyzing trace with hash 877425095, now seen corresponding path program 28 times [2021-01-06 09:57:03,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:03,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729439023] [2021-01-06 09:57:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 09:57:03,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729439023] [2021-01-06 09:57:03,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212709725] [2021-01-06 09:57:03,670 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 09:57:03,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:57:03,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:03,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 09:57:03,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 09:57:03,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:03,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 09:57:03,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162021164] [2021-01-06 09:57:03,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 09:57:03,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:03,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 09:57:03,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:57:03,900 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand 32 states. [2021-01-06 09:57:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:04,032 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2021-01-06 09:57:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 09:57:04,032 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 104 [2021-01-06 09:57:04,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:04,033 INFO L225 Difference]: With dead ends: 158 [2021-01-06 09:57:04,034 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 09:57:04,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 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 09:57:04,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 09:57:04,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-01-06 09:57:04,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 09:57:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2021-01-06 09:57:04,038 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 104 [2021-01-06 09:57:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:04,039 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2021-01-06 09:57:04,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 09:57:04,039 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2021-01-06 09:57:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 09:57:04,040 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:04,040 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:04,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 09:57:04,254 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:04,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:04,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1207300919, now seen corresponding path program 29 times [2021-01-06 09:57:04,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:04,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385917994] [2021-01-06 09:57:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 09:57:04,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385917994] [2021-01-06 09:57:04,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78597108] [2021-01-06 09:57:04,875 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 09:57:06,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 09:57:06,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:06,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:57:06,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-01-06 09:57:06,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:06,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16] total 46 [2021-01-06 09:57:06,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116533330] [2021-01-06 09:57:06,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 09:57:06,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:06,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 09:57:06,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=1455, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 09:57:06,701 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand 46 states. [2021-01-06 09:57:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:06,954 INFO L93 Difference]: Finished difference Result 165 states and 198 transitions. [2021-01-06 09:57:06,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 09:57:06,954 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 106 [2021-01-06 09:57:06,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:06,955 INFO L225 Difference]: With dead ends: 165 [2021-01-06 09:57:06,955 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 09:57:06,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=615, Invalid=1455, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 09:57:06,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 09:57:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2021-01-06 09:57:06,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-01-06 09:57:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2021-01-06 09:57:06,961 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 106 [2021-01-06 09:57:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:06,961 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2021-01-06 09:57:06,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 09:57:06,962 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2021-01-06 09:57:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 09:57:06,963 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:06,963 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:07,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:07,179 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:07,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:07,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1187401926, now seen corresponding path program 30 times [2021-01-06 09:57:07,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:07,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081480197] [2021-01-06 09:57:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-01-06 09:57:07,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081480197] [2021-01-06 09:57:07,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197570936] [2021-01-06 09:57:07,801 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 09:57:10,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-01-06 09:57:10,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:57:10,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-01-06 09:57:11,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:11,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 17] total 48 [2021-01-06 09:57:11,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441169708] [2021-01-06 09:57:11,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 09:57:11,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:11,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 09:57:11,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 09:57:11,545 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand 48 states. [2021-01-06 09:57:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:11,841 INFO L93 Difference]: Finished difference Result 173 states and 208 transitions. [2021-01-06 09:57:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 09:57:11,841 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 111 [2021-01-06 09:57:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:11,842 INFO L225 Difference]: With dead ends: 173 [2021-01-06 09:57:11,842 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 09:57:11,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 09:57:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 09:57:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-01-06 09:57:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 09:57:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2021-01-06 09:57:11,849 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 111 [2021-01-06 09:57:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:11,850 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2021-01-06 09:57:11,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 09:57:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2021-01-06 09:57:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-01-06 09:57:11,851 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:11,851 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:12,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 09:57:12,066 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:12,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:12,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1343124845, now seen corresponding path program 31 times [2021-01-06 09:57:12,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:12,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150775929] [2021-01-06 09:57:12,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 09:57:12,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150775929] [2021-01-06 09:57:12,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143130725] [2021-01-06 09:57:12,769 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 09:57:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:12,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 09:57:12,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 09:57:13,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:13,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 09:57:13,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826639745] [2021-01-06 09:57:13,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 09:57:13,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:13,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 09:57:13,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:57:13,013 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand 35 states. [2021-01-06 09:57:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:13,162 INFO L93 Difference]: Finished difference Result 176 states and 210 transitions. [2021-01-06 09:57:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 09:57:13,163 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 116 [2021-01-06 09:57:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:13,164 INFO L225 Difference]: With dead ends: 176 [2021-01-06 09:57:13,164 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 09:57:13,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 116 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 09:57:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 09:57:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-01-06 09:57:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 09:57:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2021-01-06 09:57:13,169 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 116 [2021-01-06 09:57:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:13,170 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2021-01-06 09:57:13,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 09:57:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2021-01-06 09:57:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 09:57:13,171 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:13,171 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:13,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 09:57:13,386 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:13,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:13,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1380031855, now seen corresponding path program 32 times [2021-01-06 09:57:13,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:13,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025270183] [2021-01-06 09:57:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 09:57:14,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025270183] [2021-01-06 09:57:14,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137626145] [2021-01-06 09:57:14,114 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 09:57:14,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:14,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:14,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 09:57:14,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 09:57:14,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:14,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 09:57:14,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701006078] [2021-01-06 09:57:14,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 09:57:14,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:14,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 09:57:14,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:57:14,374 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand 36 states. [2021-01-06 09:57:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:14,502 INFO L93 Difference]: Finished difference Result 178 states and 212 transitions. [2021-01-06 09:57:14,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 09:57:14,503 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 118 [2021-01-06 09:57:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:14,503 INFO L225 Difference]: With dead ends: 178 [2021-01-06 09:57:14,504 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 09:57:14,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:57:14,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 09:57:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-01-06 09:57:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-01-06 09:57:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2021-01-06 09:57:14,508 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 118 [2021-01-06 09:57:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:14,509 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2021-01-06 09:57:14,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 09:57:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2021-01-06 09:57:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-01-06 09:57:14,510 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:14,510 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:14,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 09:57:14,726 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:14,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1807037199, now seen corresponding path program 33 times [2021-01-06 09:57:14,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:14,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295666927] [2021-01-06 09:57:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 09:57:15,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295666927] [2021-01-06 09:57:15,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222910081] [2021-01-06 09:57:15,573 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 09:57:15,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 09:57:15,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:57:15,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-01-06 09:57:16,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:16,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 18] total 52 [2021-01-06 09:57:16,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750029762] [2021-01-06 09:57:16,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 09:57:16,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:16,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 09:57:16,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=1870, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 09:57:16,504 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand 52 states. [2021-01-06 09:57:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:16,854 INFO L93 Difference]: Finished difference Result 185 states and 222 transitions. [2021-01-06 09:57:16,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 09:57:16,855 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 120 [2021-01-06 09:57:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:16,856 INFO L225 Difference]: With dead ends: 185 [2021-01-06 09:57:16,857 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 09:57:16,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=782, Invalid=1870, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 09:57:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 09:57:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-01-06 09:57:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-01-06 09:57:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2021-01-06 09:57:16,862 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 120 [2021-01-06 09:57:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:16,863 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2021-01-06 09:57:16,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 09:57:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2021-01-06 09:57:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-01-06 09:57:16,863 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:16,864 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:17,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 09:57:17,073 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:17,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:17,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1399826030, now seen corresponding path program 34 times [2021-01-06 09:57:17,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:17,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475930326] [2021-01-06 09:57:17,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 09:57:17,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475930326] [2021-01-06 09:57:17,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445151898] [2021-01-06 09:57:17,877 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 09:57:17,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:57:17,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:17,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 09:57:17,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 09:57:18,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:18,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 09:57:18,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881616194] [2021-01-06 09:57:18,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 09:57:18,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:18,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 09:57:18,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:57:18,148 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand 38 states. [2021-01-06 09:57:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:18,293 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2021-01-06 09:57:18,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 09:57:18,294 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 125 [2021-01-06 09:57:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:18,295 INFO L225 Difference]: With dead ends: 188 [2021-01-06 09:57:18,295 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 09:57:18,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:57:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 09:57:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-01-06 09:57:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 09:57:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2021-01-06 09:57:18,300 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 125 [2021-01-06 09:57:18,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:18,300 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2021-01-06 09:57:18,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 09:57:18,301 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2021-01-06 09:57:18,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-01-06 09:57:18,301 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:18,301 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:18,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 09:57:18,517 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:18,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:18,517 INFO L82 PathProgramCache]: Analyzing trace with hash -704834608, now seen corresponding path program 35 times [2021-01-06 09:57:18,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:18,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53763305] [2021-01-06 09:57:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 09:57:19,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53763305] [2021-01-06 09:57:19,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972409108] [2021-01-06 09:57:19,429 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 09:57:21,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-01-06 09:57:21,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:21,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 09:57:21,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 09:57:22,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:22,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 09:57:22,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949328060] [2021-01-06 09:57:22,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 09:57:22,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:22,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 09:57:22,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 09:57:22,026 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand 39 states. [2021-01-06 09:57:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:22,153 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2021-01-06 09:57:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 09:57:22,153 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 127 [2021-01-06 09:57:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:22,154 INFO L225 Difference]: With dead ends: 190 [2021-01-06 09:57:22,154 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 09:57:22,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 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 09:57:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 09:57:22,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-01-06 09:57:22,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 09:57:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2021-01-06 09:57:22,158 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 127 [2021-01-06 09:57:22,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:22,159 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2021-01-06 09:57:22,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 09:57:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2021-01-06 09:57:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-01-06 09:57:22,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:22,159 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:22,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 09:57:22,360 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:22,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:22,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1461991054, now seen corresponding path program 36 times [2021-01-06 09:57:22,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:22,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082656238] [2021-01-06 09:57:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 09:57:23,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082656238] [2021-01-06 09:57:23,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898385610] [2021-01-06 09:57:23,243 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 09:57:27,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2021-01-06 09:57:27,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:27,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:57:27,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-01-06 09:57:28,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:28,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 19] total 56 [2021-01-06 09:57:28,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965132968] [2021-01-06 09:57:28,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 09:57:28,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:28,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 09:57:28,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=2169, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 09:57:28,515 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand 56 states. [2021-01-06 09:57:28,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:28,751 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2021-01-06 09:57:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 09:57:28,752 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 129 [2021-01-06 09:57:28,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:28,753 INFO L225 Difference]: With dead ends: 197 [2021-01-06 09:57:28,753 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 09:57:28,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=911, Invalid=2169, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 09:57:28,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 09:57:28,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2021-01-06 09:57:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 09:57:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2021-01-06 09:57:28,761 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 129 [2021-01-06 09:57:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:28,762 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2021-01-06 09:57:28,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 09:57:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2021-01-06 09:57:28,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-01-06 09:57:28,763 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:28,763 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:28,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 09:57:28,978 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:28,978 INFO L82 PathProgramCache]: Analyzing trace with hash 975069465, now seen corresponding path program 37 times [2021-01-06 09:57:28,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:28,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349986443] [2021-01-06 09:57:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 09:57:30,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349986443] [2021-01-06 09:57:30,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929586943] [2021-01-06 09:57:30,025 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 09:57:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 09:57:30,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 09:57:30,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:30,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 09:57:30,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578472738] [2021-01-06 09:57:30,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 09:57:30,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:30,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 09:57:30,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 09:57:30,305 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand 41 states. [2021-01-06 09:57:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:30,465 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2021-01-06 09:57:30,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 09:57:30,465 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 134 [2021-01-06 09:57:30,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:30,466 INFO L225 Difference]: With dead ends: 200 [2021-01-06 09:57:30,467 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 09:57:30,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 134 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 09:57:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 09:57:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-01-06 09:57:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-06 09:57:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 158 transitions. [2021-01-06 09:57:30,471 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 158 transitions. Word has length 134 [2021-01-06 09:57:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:30,471 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 158 transitions. [2021-01-06 09:57:30,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 09:57:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 158 transitions. [2021-01-06 09:57:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 09:57:30,472 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:30,472 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:30,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 09:57:30,673 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:30,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:30,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1881951387, now seen corresponding path program 38 times [2021-01-06 09:57:30,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:30,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346708806] [2021-01-06 09:57:30,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 09:57:31,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346708806] [2021-01-06 09:57:31,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900083730] [2021-01-06 09:57:31,715 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 09:57:31,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:31,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:31,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 09:57:31,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 09:57:32,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:32,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 09:57:32,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749076369] [2021-01-06 09:57:32,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 09:57:32,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:32,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 09:57:32,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 09:57:32,007 INFO L87 Difference]: Start difference. First operand 139 states and 158 transitions. Second operand 42 states. [2021-01-06 09:57:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:32,157 INFO L93 Difference]: Finished difference Result 202 states and 240 transitions. [2021-01-06 09:57:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 09:57:32,157 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 136 [2021-01-06 09:57:32,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:32,158 INFO L225 Difference]: With dead ends: 202 [2021-01-06 09:57:32,158 INFO L226 Difference]: Without dead ends: 142 [2021-01-06 09:57:32,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 09:57:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-01-06 09:57:32,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-01-06 09:57:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-01-06 09:57:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-01-06 09:57:32,163 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 136 [2021-01-06 09:57:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:32,164 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-01-06 09:57:32,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 09:57:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-01-06 09:57:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 09:57:32,165 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:32,165 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:32,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:32,380 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:32,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:32,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1517117341, now seen corresponding path program 39 times [2021-01-06 09:57:32,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:32,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939493943] [2021-01-06 09:57:32,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 09:57:33,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939493943] [2021-01-06 09:57:33,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003168530] [2021-01-06 09:57:33,458 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 09:57:33,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 09:57:33,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:33,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 09:57:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2021-01-06 09:57:34,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:34,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 20] total 60 [2021-01-06 09:57:34,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129338874] [2021-01-06 09:57:34,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 09:57:34,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:34,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 09:57:34,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1050, Invalid=2490, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 09:57:34,646 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand 60 states. [2021-01-06 09:57:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:35,043 INFO L93 Difference]: Finished difference Result 209 states and 250 transitions. [2021-01-06 09:57:35,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 09:57:35,044 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 138 [2021-01-06 09:57:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:35,045 INFO L225 Difference]: With dead ends: 209 [2021-01-06 09:57:35,045 INFO L226 Difference]: Without dead ends: 149 [2021-01-06 09:57:35,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1050, Invalid=2490, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 09:57:35,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-01-06 09:57:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2021-01-06 09:57:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-01-06 09:57:35,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2021-01-06 09:57:35,051 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 138 [2021-01-06 09:57:35,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:35,051 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2021-01-06 09:57:35,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 09:57:35,052 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2021-01-06 09:57:35,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-01-06 09:57:35,052 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:35,053 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:35,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:35,266 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:35,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:35,266 INFO L82 PathProgramCache]: Analyzing trace with hash -159054874, now seen corresponding path program 40 times [2021-01-06 09:57:35,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:35,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322651411] [2021-01-06 09:57:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-01-06 09:57:36,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322651411] [2021-01-06 09:57:36,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432053673] [2021-01-06 09:57:36,473 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:36,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:57:36,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:36,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 09:57:36,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-01-06 09:57:37,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:37,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 21] total 62 [2021-01-06 09:57:37,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672898062] [2021-01-06 09:57:37,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 09:57:37,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:37,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 09:57:37,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1112, Invalid=2670, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 09:57:37,554 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand 62 states. [2021-01-06 09:57:37,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:37,886 INFO L93 Difference]: Finished difference Result 217 states and 260 transitions. [2021-01-06 09:57:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 09:57:37,886 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 143 [2021-01-06 09:57:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:37,888 INFO L225 Difference]: With dead ends: 217 [2021-01-06 09:57:37,888 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 09:57:37,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1112, Invalid=2670, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 09:57:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 09:57:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2021-01-06 09:57:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 09:57:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2021-01-06 09:57:37,897 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 143 [2021-01-06 09:57:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:37,897 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2021-01-06 09:57:37,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 09:57:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2021-01-06 09:57:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-01-06 09:57:37,898 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:37,899 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:38,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 09:57:38,113 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:38,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1007793855, now seen corresponding path program 41 times [2021-01-06 09:57:38,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:38,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602000549] [2021-01-06 09:57:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 09:57:39,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602000549] [2021-01-06 09:57:39,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762101603] [2021-01-06 09:57:39,284 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:46,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 09:57:46,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:46,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 09:57:46,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 09:57:46,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:46,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 09:57:46,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634668296] [2021-01-06 09:57:46,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 09:57:46,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:46,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 09:57:46,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 09:57:46,382 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand 45 states. [2021-01-06 09:57:46,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:46,570 INFO L93 Difference]: Finished difference Result 220 states and 262 transitions. [2021-01-06 09:57:46,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 09:57:46,571 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 148 [2021-01-06 09:57:46,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:46,572 INFO L225 Difference]: With dead ends: 220 [2021-01-06 09:57:46,572 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 09:57:46,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 09:57:46,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 09:57:46,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-01-06 09:57:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 09:57:46,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2021-01-06 09:57:46,577 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 148 [2021-01-06 09:57:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:46,577 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2021-01-06 09:57:46,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 09:57:46,578 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2021-01-06 09:57:46,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-01-06 09:57:46,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:46,578 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:46,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:46,779 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:46,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash -349116093, now seen corresponding path program 42 times [2021-01-06 09:57:46,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:46,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502502915] [2021-01-06 09:57:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 09:57:48,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502502915] [2021-01-06 09:57:48,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595526821] [2021-01-06 09:57:48,139 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:59,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-01-06 09:57:59,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:59,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:57:59,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:58:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2021-01-06 09:58:00,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:58:00,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 22] total 65 [2021-01-06 09:58:00,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075829683] [2021-01-06 09:58:00,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 09:58:00,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:58:00,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 09:58:00,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 09:58:00,094 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand 65 states. [2021-01-06 09:58:00,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:58:00,510 INFO L93 Difference]: Finished difference Result 227 states and 272 transitions. [2021-01-06 09:58:00,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 09:58:00,511 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 150 [2021-01-06 09:58:00,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:58:00,512 INFO L225 Difference]: With dead ends: 227 [2021-01-06 09:58:00,512 INFO L226 Difference]: Without dead ends: 161 [2021-01-06 09:58:00,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 09:58:00,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-01-06 09:58:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2021-01-06 09:58:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 09:58:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2021-01-06 09:58:00,519 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 150 [2021-01-06 09:58:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:58:00,519 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2021-01-06 09:58:00,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 09:58:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2021-01-06 09:58:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-01-06 09:58:00,520 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:58:00,520 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:58:00,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:00,735 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:58:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:58:00,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1604131968, now seen corresponding path program 43 times [2021-01-06 09:58:00,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:58:00,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016664960] [2021-01-06 09:58:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:58:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:58:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-01-06 09:58:02,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016664960] [2021-01-06 09:58:02,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263460566] [2021-01-06 09:58:02,040 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:58:02,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 09:58:02,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:58:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-01-06 09:58:02,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:58:02,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 09:58:02,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075339864] [2021-01-06 09:58:02,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 09:58:02,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:58:02,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 09:58:02,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 09:58:02,380 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand 47 states. [2021-01-06 09:58:02,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:58:02,594 INFO L93 Difference]: Finished difference Result 230 states and 274 transitions. [2021-01-06 09:58:02,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 09:58:02,595 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 155 [2021-01-06 09:58:02,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:58:02,596 INFO L225 Difference]: With dead ends: 230 [2021-01-06 09:58:02,596 INFO L226 Difference]: Without dead ends: 161 [2021-01-06 09:58:02,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 09:58:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-01-06 09:58:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-01-06 09:58:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 09:58:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2021-01-06 09:58:02,601 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 155 [2021-01-06 09:58:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:58:02,602 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2021-01-06 09:58:02,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 09:58:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2021-01-06 09:58:02,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-01-06 09:58:02,603 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:58:02,603 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:58:02,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 09:58:02,817 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:58:02,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:58:02,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1230070466, now seen corresponding path program 44 times [2021-01-06 09:58:02,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:58:02,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809529242] [2021-01-06 09:58:02,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:58:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:58:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-01-06 09:58:04,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809529242] [2021-01-06 09:58:04,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402890977] [2021-01-06 09:58:04,194 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:04,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:58:04,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:58:04,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 09:58:04,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:58:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-01-06 09:58:04,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:58:04,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 09:58:04,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907906084] [2021-01-06 09:58:04,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 09:58:04,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:58:04,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 09:58:04,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 09:58:04,510 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand 48 states. [2021-01-06 09:58:04,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:58:04,705 INFO L93 Difference]: Finished difference Result 232 states and 276 transitions. [2021-01-06 09:58:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 09:58:04,710 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 157 [2021-01-06 09:58:04,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:58:04,711 INFO L225 Difference]: With dead ends: 232 [2021-01-06 09:58:04,711 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 09:58:04,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 09:58:04,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 09:58:04,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-01-06 09:58:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 09:58:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2021-01-06 09:58:04,716 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 157 [2021-01-06 09:58:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:58:04,717 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2021-01-06 09:58:04,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 09:58:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2021-01-06 09:58:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-01-06 09:58:04,718 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:58:04,718 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:58:04,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 09:58:04,932 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:58:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:58:04,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1760747388, now seen corresponding path program 45 times [2021-01-06 09:58:04,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:58:04,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976161150] [2021-01-06 09:58:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:58:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:58:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-01-06 09:58:06,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976161150] [2021-01-06 09:58:06,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392368593] [2021-01-06 09:58:06,372 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:06,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-01-06 09:58:06,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:58:06,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:58:06,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:58:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2021-01-06 09:58:08,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:58:08,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 23] total 69 [2021-01-06 09:58:08,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014419083] [2021-01-06 09:58:08,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 09:58:08,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:58:08,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 09:58:08,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3312, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 09:58:08,082 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand 69 states. [2021-01-06 09:58:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:58:08,518 INFO L93 Difference]: Finished difference Result 239 states and 286 transitions. [2021-01-06 09:58:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 09:58:08,519 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 159 [2021-01-06 09:58:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:58:08,520 INFO L225 Difference]: With dead ends: 239 [2021-01-06 09:58:08,520 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 09:58:08,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1380, Invalid=3312, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 09:58:08,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 09:58:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2021-01-06 09:58:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 09:58:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 190 transitions. [2021-01-06 09:58:08,527 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 190 transitions. Word has length 159 [2021-01-06 09:58:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:58:08,527 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 190 transitions. [2021-01-06 09:58:08,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 09:58:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 190 transitions. [2021-01-06 09:58:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-01-06 09:58:08,528 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:58:08,528 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:58:08,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 09:58:08,743 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:58:08,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:58:08,744 INFO L82 PathProgramCache]: Analyzing trace with hash 872774123, now seen corresponding path program 46 times [2021-01-06 09:58:08,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:58:08,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104210541] [2021-01-06 09:58:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:58:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:58:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-01-06 09:58:10,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104210541] [2021-01-06 09:58:10,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108955479] [2021-01-06 09:58:10,337 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:10,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:58:10,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:58:10,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 09:58:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:58:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-01-06 09:58:11,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:58:11,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 24] total 71 [2021-01-06 09:58:11,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219107672] [2021-01-06 09:58:11,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-01-06 09:58:11,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:58:11,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-01-06 09:58:11,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1451, Invalid=3519, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 09:58:11,725 INFO L87 Difference]: Start difference. First operand 167 states and 190 transitions. Second operand 71 states. [2021-01-06 09:58:12,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:58:12,145 INFO L93 Difference]: Finished difference Result 247 states and 296 transitions. [2021-01-06 09:58:12,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 09:58:12,146 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 164 [2021-01-06 09:58:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:58:12,147 INFO L225 Difference]: With dead ends: 247 [2021-01-06 09:58:12,147 INFO L226 Difference]: Without dead ends: 175 [2021-01-06 09:58:12,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1451, Invalid=3519, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 09:58:12,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-01-06 09:58:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2021-01-06 09:58:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 09:58:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2021-01-06 09:58:12,154 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 164 [2021-01-06 09:58:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:58:12,154 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2021-01-06 09:58:12,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2021-01-06 09:58:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2021-01-06 09:58:12,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-01-06 09:58:12,156 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:58:12,156 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:58:12,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:58:12,371 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:58:12,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:58:12,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1899844264, now seen corresponding path program 47 times [2021-01-06 09:58:12,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:58:12,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160452164] [2021-01-06 09:58:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:58:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:58:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2924 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-01-06 09:58:14,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160452164] [2021-01-06 09:58:14,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339924449] [2021-01-06 09:58:14,004 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:59:32,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-01-06 09:59:32,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:59:32,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 09:59:32,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:59:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2924 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2021-01-06 09:59:33,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:59:33,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 25] total 73 [2021-01-06 09:59:33,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060243690] [2021-01-06 09:59:33,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-01-06 09:59:33,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:59:33,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-01-06 09:59:33,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=3732, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 09:59:33,838 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand 73 states. [2021-01-06 09:59:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:59:34,284 INFO L93 Difference]: Finished difference Result 255 states and 306 transitions. [2021-01-06 09:59:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-01-06 09:59:34,285 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 169 [2021-01-06 09:59:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:59:34,286 INFO L225 Difference]: With dead ends: 255 [2021-01-06 09:59:34,286 INFO L226 Difference]: Without dead ends: 180 [2021-01-06 09:59:34,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1524, Invalid=3732, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 09:59:34,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-01-06 09:59:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2021-01-06 09:59:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 09:59:34,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 202 transitions. [2021-01-06 09:59:34,294 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 202 transitions. Word has length 169 [2021-01-06 09:59:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:59:34,294 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 202 transitions. [2021-01-06 09:59:34,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2021-01-06 09:59:34,295 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 202 transitions. [2021-01-06 09:59:34,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-01-06 09:59:34,296 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:59:34,296 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:59:34,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 09:59:34,510 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:59:34,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:59:34,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2102154255, now seen corresponding path program 48 times [2021-01-06 09:59:34,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:59:34,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907684226] [2021-01-06 09:59:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:59:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:59:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3086 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-01-06 09:59:36,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907684226] [2021-01-06 09:59:36,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929126610] [2021-01-06 09:59:36,301 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:00:44,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-01-06 10:00:44,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:00:44,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 10:00:44,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:00:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3086 backedges. 95 proven. 782 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2021-01-06 10:00:46,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:00:46,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 28] total 77 [2021-01-06 10:00:46,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147681207] [2021-01-06 10:00:46,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-01-06 10:00:46,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:00:46,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-01-06 10:00:46,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1702, Invalid=4150, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 10:00:46,373 INFO L87 Difference]: Start difference. First operand 177 states and 202 transitions. Second operand 77 states. [2021-01-06 10:00:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:00:48,491 INFO L93 Difference]: Finished difference Result 264 states and 318 transitions. [2021-01-06 10:00:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-01-06 10:00:48,494 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 174 [2021-01-06 10:00:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:00:48,495 INFO L225 Difference]: With dead ends: 264 [2021-01-06 10:00:48,495 INFO L226 Difference]: Without dead ends: 186 [2021-01-06 10:00:48,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2350, Invalid=7750, Unknown=0, NotChecked=0, Total=10100 [2021-01-06 10:00:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-01-06 10:00:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-01-06 10:00:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 10:00:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 210 transitions. [2021-01-06 10:00:48,503 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 210 transitions. Word has length 174 [2021-01-06 10:00:48,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:00:48,503 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 210 transitions. [2021-01-06 10:00:48,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2021-01-06 10:00:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 210 transitions. [2021-01-06 10:00:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 10:00:48,505 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:00:48,505 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:00:48,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:00:48,706 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:00:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:00:48,707 INFO L82 PathProgramCache]: Analyzing trace with hash 898464498, now seen corresponding path program 49 times [2021-01-06 10:00:48,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:00:48,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152866834] [2021-01-06 10:00:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:00:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:00:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3352 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-01-06 10:00:50,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152866834] [2021-01-06 10:00:50,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673776137] [2021-01-06 10:00:50,588 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:00:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:00:50,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 10:00:50,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:00:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3352 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-01-06 10:00:50,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:00:50,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 10:00:50,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134558710] [2021-01-06 10:00:50,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 10:00:50,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:00:50,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 10:00:50,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:00:50,958 INFO L87 Difference]: Start difference. First operand 184 states and 210 transitions. Second operand 54 states. [2021-01-06 10:00:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:00:51,238 INFO L93 Difference]: Finished difference Result 268 states and 320 transitions. [2021-01-06 10:00:51,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 10:00:51,239 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 181 [2021-01-06 10:00:51,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:00:51,240 INFO L225 Difference]: With dead ends: 268 [2021-01-06 10:00:51,240 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 10:00:51,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:00:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 10:00:51,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-01-06 10:00:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-01-06 10:00:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 212 transitions. [2021-01-06 10:00:51,247 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 212 transitions. Word has length 181 [2021-01-06 10:00:51,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:00:51,247 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 212 transitions. [2021-01-06 10:00:51,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 10:00:51,247 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 212 transitions. [2021-01-06 10:00:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-01-06 10:00:51,248 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:00:51,248 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:00:51,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:00:51,462 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:00:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:00:51,463 INFO L82 PathProgramCache]: Analyzing trace with hash -748788944, now seen corresponding path program 50 times [2021-01-06 10:00:51,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:00:51,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748373316] [2021-01-06 10:00:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:00:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat