/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-cav19/array_init_var_plus_ind.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:02:33,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:02:33,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:02:33,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:02:33,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:02:33,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:02:33,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:02:33,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:02:33,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:02:33,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:02:33,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:02:33,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:02:33,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:02:33,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:02:33,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:02:33,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:02:33,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:02:33,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:02:33,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:02:33,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:02:33,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:02:33,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:02:33,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:02:33,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:02:33,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:02:34,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 11:02:34,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 11:02:34,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 11:02:34,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 11:02:34,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 11:02:34,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 11:02:34,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 11:02:34,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 11:02:34,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:02:34,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:02:34,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:02:34,018 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 11:02:34,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:02:34,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:02:34,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:02:34,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:02:34,087 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:02:34,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:02:34,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:02:34,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:02:34,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:02:34,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:02:34,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:02:34,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:02:34,090 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:02:34,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:02:34,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:02:34,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:02:34,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:02:34,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:02:34,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:02:34,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:02:34,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:02:34,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:02:34,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:02:34,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:02:34,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:02:34,094 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:02:34,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:02:34,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:02:34,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:02:34,589 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:02:34,589 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:02:34,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2021-01-06 11:02:34,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/098518763/f94c9611caf74568823ea930840d6614/FLAG7dea3557d [2021-01-06 11:02:35,395 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:02:35,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2021-01-06 11:02:35,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/098518763/f94c9611caf74568823ea930840d6614/FLAG7dea3557d [2021-01-06 11:02:35,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/098518763/f94c9611caf74568823ea930840d6614 [2021-01-06 11:02:35,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:02:35,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:02:35,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:02:35,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:02:35,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:02:35,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:02:35" (1/1) ... [2021-01-06 11:02:35,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d96288a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:35, skipping insertion in model container [2021-01-06 11:02:35,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:02:35" (1/1) ... [2021-01-06 11:02:35,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:02:35,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:02:35,932 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-cav19/array_init_var_plus_ind.c[414,427] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 11:02:35,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:02:35,959 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:02:35,974 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-cav19/array_init_var_plus_ind.c[414,427] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 11:02:35,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:02:35,997 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:02:35,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:35 WrapperNode [2021-01-06 11:02:35,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:02:35,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:02:36,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:02:36,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:02:36,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:35" (1/1) ... [2021-01-06 11:02:36,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:35" (1/1) ... [2021-01-06 11:02:36,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:02:36,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:02:36,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:02:36,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:02:36,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:35" (1/1) ... [2021-01-06 11:02:36,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:35" (1/1) ... [2021-01-06 11:02:36,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:35" (1/1) ... [2021-01-06 11:02:36,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:35" (1/1) ... [2021-01-06 11:02:36,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:35" (1/1) ... [2021-01-06 11:02:36,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:35" (1/1) ... [2021-01-06 11:02:36,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:35" (1/1) ... [2021-01-06 11:02:36,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:02:36,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:02:36,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:02:36,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:02:36,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:35" (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 11:02:36,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:02:36,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:02:36,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:02:36,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:02:36,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:02:36,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:02:36,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 11:02:36,457 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:02:36,458 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 11:02:36,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:02:36 BoogieIcfgContainer [2021-01-06 11:02:36,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:02:36,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:02:36,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:02:36,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:02:36,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:02:35" (1/3) ... [2021-01-06 11:02:36,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3776ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:02:36, skipping insertion in model container [2021-01-06 11:02:36,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:35" (2/3) ... [2021-01-06 11:02:36,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3776ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:02:36, skipping insertion in model container [2021-01-06 11:02:36,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:02:36" (3/3) ... [2021-01-06 11:02:36,470 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.c [2021-01-06 11:02:36,478 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:02:36,484 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:02:36,528 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:02:36,593 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:02:36,594 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:02:36,594 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:02:36,594 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:02:36,595 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:02:36,595 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:02:36,595 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:02:36,595 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:02:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 11:02:36,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 11:02:36,639 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:36,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:36,641 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:36,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2021-01-06 11:02:36,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:36,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582169223] [2021-01-06 11:02:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:36,890 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 11:02:36,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582169223] [2021-01-06 11:02:36,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:02:36,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:02:36,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286320143] [2021-01-06 11:02:36,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:02:36,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:36,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:02:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:02:36,927 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2021-01-06 11:02:36,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:36,949 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-01-06 11:02:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:02:36,950 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 11:02:36,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:36,977 INFO L225 Difference]: With dead ends: 27 [2021-01-06 11:02:36,978 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 11:02:36,982 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 11:02:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 11:02:37,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 11:02:37,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 11:02:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-01-06 11:02:37,026 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2021-01-06 11:02:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:37,027 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-01-06 11:02:37,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:02:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-01-06 11:02:37,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 11:02:37,029 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:37,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:37,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:02:37,030 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:37,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2021-01-06 11:02:37,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:37,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947635812] [2021-01-06 11:02:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:37,209 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 11:02:37,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947635812] [2021-01-06 11:02:37,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:02:37,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:02:37,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897236543] [2021-01-06 11:02:37,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:02:37,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:37,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:02:37,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:02:37,214 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2021-01-06 11:02:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:37,275 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-01-06 11:02:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:02:37,275 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-01-06 11:02:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:37,277 INFO L225 Difference]: With dead ends: 29 [2021-01-06 11:02:37,277 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 11:02:37,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:02:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 11:02:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2021-01-06 11:02:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 11:02:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-01-06 11:02:37,286 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-01-06 11:02:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:37,287 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-01-06 11:02:37,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:02:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-01-06 11:02:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 11:02:37,290 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:37,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:37,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:02:37,291 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:37,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:37,294 INFO L82 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2021-01-06 11:02:37,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:37,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554933118] [2021-01-06 11:02:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:37,393 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 11:02:37,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554933118] [2021-01-06 11:02:37,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:02:37,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:02:37,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769951623] [2021-01-06 11:02:37,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:02:37,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:37,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:02:37,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:02:37,399 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2021-01-06 11:02:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:37,428 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-01-06 11:02:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:02:37,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-01-06 11:02:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:37,432 INFO L225 Difference]: With dead ends: 23 [2021-01-06 11:02:37,432 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 11:02:37,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:02:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 11:02:37,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-01-06 11:02:37,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 11:02:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-01-06 11:02:37,443 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-01-06 11:02:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:37,443 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-01-06 11:02:37,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:02:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-01-06 11:02:37,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 11:02:37,444 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:37,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:37,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 11:02:37,445 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:37,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:37,446 INFO L82 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2021-01-06 11:02:37,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:37,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19813280] [2021-01-06 11:02:37,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:37,554 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 11:02:37,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19813280] [2021-01-06 11:02:37,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486758965] [2021-01-06 11:02:37,555 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 11:02:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:37,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 11:02:37,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:37,707 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 11:02:37,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:37,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-01-06 11:02:37,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522444751] [2021-01-06 11:02:37,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 11:02:37,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:37,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 11:02:37,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:02:37,710 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2021-01-06 11:02:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:37,765 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-01-06 11:02:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:02:37,766 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-01-06 11:02:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:37,767 INFO L225 Difference]: With dead ends: 27 [2021-01-06 11:02:37,767 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 11:02:37,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:02:37,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 11:02:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-01-06 11:02:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 11:02:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 11:02:37,772 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-01-06 11:02:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:37,772 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 11:02:37,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 11:02:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 11:02:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 11:02:37,773 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:37,773 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:37,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:37,989 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:37,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:37,990 INFO L82 PathProgramCache]: Analyzing trace with hash 818898063, now seen corresponding path program 2 times [2021-01-06 11:02:37,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:37,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879438035] [2021-01-06 11:02:37,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:38,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879438035] [2021-01-06 11:02:38,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855057991] [2021-01-06 11:02:38,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:38,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:02:38,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:38,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:02:38,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:38,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:38,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 11:02:38,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628151807] [2021-01-06 11:02:38,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:02:38,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:38,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:02:38,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:02:38,246 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 9 states. [2021-01-06 11:02:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:38,307 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-01-06 11:02:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:02:38,308 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2021-01-06 11:02:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:38,309 INFO L225 Difference]: With dead ends: 35 [2021-01-06 11:02:38,309 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 11:02:38,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:02:38,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 11:02:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-01-06 11:02:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 11:02:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-01-06 11:02:38,315 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2021-01-06 11:02:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:38,315 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-01-06 11:02:38,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:02:38,315 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-01-06 11:02:38,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 11:02:38,316 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:38,316 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:38,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:38,531 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:38,533 INFO L82 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2021-01-06 11:02:38,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:38,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971373563] [2021-01-06 11:02:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:38,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971373563] [2021-01-06 11:02:38,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039826676] [2021-01-06 11:02:38,697 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 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 11:02:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:38,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:02:38,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:38,822 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:38,823 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:38,832 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:38,838 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:02:38,838 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:18 [2021-01-06 11:02:38,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:38,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:38,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:38,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-01-06 11:02:38,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81889454] [2021-01-06 11:02:38,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:02:38,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:38,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:02:38,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:02:38,916 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 11 states. [2021-01-06 11:02:39,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:39,126 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-01-06 11:02:39,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:02:39,128 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2021-01-06 11:02:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:39,129 INFO L225 Difference]: With dead ends: 35 [2021-01-06 11:02:39,129 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 11:02:39,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:02:39,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 11:02:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-01-06 11:02:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 11:02:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-01-06 11:02:39,141 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-01-06 11:02:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:39,144 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-01-06 11:02:39,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:02:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-01-06 11:02:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 11:02:39,145 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:39,145 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:39,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:39,347 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:39,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1827520567, now seen corresponding path program 3 times [2021-01-06 11:02:39,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:39,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325767411] [2021-01-06 11:02:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:39,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325767411] [2021-01-06 11:02:39,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506806668] [2021-01-06 11:02:39,429 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 11:02:39,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 11:02:39,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:39,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:02:39,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:39,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:39,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 11:02:39,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923287000] [2021-01-06 11:02:39,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:02:39,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:39,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:02:39,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:02:39,565 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 11 states. [2021-01-06 11:02:39,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:39,630 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-01-06 11:02:39,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:02:39,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2021-01-06 11:02:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:39,632 INFO L225 Difference]: With dead ends: 47 [2021-01-06 11:02:39,632 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 11:02:39,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:02:39,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 11:02:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2021-01-06 11:02:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 11:02:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-01-06 11:02:39,638 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-01-06 11:02:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:39,639 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-01-06 11:02:39,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:02:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-01-06 11:02:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 11:02:39,639 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:39,640 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:39,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:39,856 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:39,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:39,857 INFO L82 PathProgramCache]: Analyzing trace with hash -768933834, now seen corresponding path program 2 times [2021-01-06 11:02:39,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:39,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313901859] [2021-01-06 11:02:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:40,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313901859] [2021-01-06 11:02:40,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317947419] [2021-01-06 11:02:40,069 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 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 11:02:40,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:02:40,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:40,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:02:40,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:40,182 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:40,183 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:40,191 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:40,193 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:40,194 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-01-06 11:02:40,274 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:40,275 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2021-01-06 11:02:40,278 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:40,281 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:40,310 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2021-01-06 11:02:40,315 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:02:40,316 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2021-01-06 11:02:40,381 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:40,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:40,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:40,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-01-06 11:02:40,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318578460] [2021-01-06 11:02:40,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:02:40,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:40,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:02:40,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:02:40,419 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 13 states. [2021-01-06 11:02:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:40,646 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-01-06 11:02:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:02:40,647 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2021-01-06 11:02:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:40,647 INFO L225 Difference]: With dead ends: 32 [2021-01-06 11:02:40,648 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 11:02:40,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:02:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 11:02:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-01-06 11:02:40,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 11:02:40,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-01-06 11:02:40,654 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-01-06 11:02:40,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:40,654 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-01-06 11:02:40,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:02:40,654 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-01-06 11:02:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 11:02:40,655 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:40,655 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:40,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:40,869 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:40,870 INFO L82 PathProgramCache]: Analyzing trace with hash 20881638, now seen corresponding path program 1 times [2021-01-06 11:02:40,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:40,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944442357] [2021-01-06 11:02:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:40,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944442357] [2021-01-06 11:02:40,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170175839] [2021-01-06 11:02:40,931 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 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 11:02:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:40,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:02:40,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:41,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:41,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 11:02:41,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826225838] [2021-01-06 11:02:41,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:02:41,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:41,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:02:41,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:02:41,053 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 10 states. [2021-01-06 11:02:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:41,099 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-01-06 11:02:41,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:02:41,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2021-01-06 11:02:41,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:41,100 INFO L225 Difference]: With dead ends: 36 [2021-01-06 11:02:41,100 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 11:02:41,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:02:41,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 11:02:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 11:02:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 11:02:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 11:02:41,106 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2021-01-06 11:02:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:41,106 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 11:02:41,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:02:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 11:02:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 11:02:41,107 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:41,107 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:41,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:41,322 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:41,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:41,323 INFO L82 PathProgramCache]: Analyzing trace with hash -796542484, now seen corresponding path program 2 times [2021-01-06 11:02:41,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:41,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481461501] [2021-01-06 11:02:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:41,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481461501] [2021-01-06 11:02:41,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268439365] [2021-01-06 11:02:41,517 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 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 11:02:41,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:02:41,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:41,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 11:02:41,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:41,669 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:41,671 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:41,678 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:41,679 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:41,680 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:02:41,916 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:41,919 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:02:41,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:41,926 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:02:41,928 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 11:02:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:41,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:41,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-01-06 11:02:41,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869895724] [2021-01-06 11:02:41,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 11:02:41,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:41,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 11:02:41,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:02:41,959 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 19 states. [2021-01-06 11:02:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:42,417 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-01-06 11:02:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:02:42,417 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2021-01-06 11:02:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:42,418 INFO L225 Difference]: With dead ends: 37 [2021-01-06 11:02:42,418 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 11:02:42,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:02:42,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 11:02:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-01-06 11:02:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 11:02:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 11:02:42,424 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2021-01-06 11:02:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:42,424 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 11:02:42,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 11:02:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 11:02:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 11:02:42,425 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:42,425 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:42,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 11:02:42,626 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:42,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:42,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1605494661, now seen corresponding path program 1 times [2021-01-06 11:02:42,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:42,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111411769] [2021-01-06 11:02:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 11:02:42,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111411769] [2021-01-06 11:02:42,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823638200] [2021-01-06 11:02:42,725 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 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 11:02:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:42,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 11:02:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 11:02:42,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:42,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 11:02:42,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066485626] [2021-01-06 11:02:42,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:02:42,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:42,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:02:42,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:02:42,892 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 13 states. [2021-01-06 11:02:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:42,957 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-01-06 11:02:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:02:42,958 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2021-01-06 11:02:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:42,958 INFO L225 Difference]: With dead ends: 47 [2021-01-06 11:02:42,958 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 11:02:42,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:02:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 11:02:42,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-01-06 11:02:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 11:02:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-01-06 11:02:42,965 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2021-01-06 11:02:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:42,965 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-01-06 11:02:42,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:02:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-01-06 11:02:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 11:02:42,966 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:42,966 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:43,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 11:02:43,180 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:43,181 INFO L82 PathProgramCache]: Analyzing trace with hash -213992666, now seen corresponding path program 3 times [2021-01-06 11:02:43,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:43,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218605420] [2021-01-06 11:02:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:43,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218605420] [2021-01-06 11:02:43,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338756809] [2021-01-06 11:02:43,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:43,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 11:02:43,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:43,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 11:02:43,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:43,550 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:43,552 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:43,570 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:43,572 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:43,572 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-01-06 11:02:43,652 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:43,653 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2021-01-06 11:02:43,655 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:43,657 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:43,683 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2021-01-06 11:02:43,686 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:02:43,687 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2021-01-06 11:02:43,772 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:43,775 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:43,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:43,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-01-06 11:02:43,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761345231] [2021-01-06 11:02:43,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 11:02:43,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:43,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 11:02:43,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:02:43,802 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 17 states. [2021-01-06 11:02:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:44,165 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-01-06 11:02:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:02:44,166 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2021-01-06 11:02:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:44,166 INFO L225 Difference]: With dead ends: 36 [2021-01-06 11:02:44,166 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 11:02:44,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:02:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 11:02:44,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-01-06 11:02:44,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 11:02:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-01-06 11:02:44,182 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2021-01-06 11:02:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:44,184 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-01-06 11:02:44,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 11:02:44,185 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-01-06 11:02:44,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 11:02:44,188 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:44,188 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:44,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:44,401 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:44,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:44,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2053274844, now seen corresponding path program 4 times [2021-01-06 11:02:44,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:44,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985569748] [2021-01-06 11:02:44,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:44,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985569748] [2021-01-06 11:02:44,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875317744] [2021-01-06 11:02:44,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:44,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:02:44,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:44,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 11:02:44,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:45,066 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:02:45,067 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:45,072 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:45,074 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:45,074 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2021-01-06 11:02:45,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:45,235 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:45,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:45,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-01-06 11:02:45,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876952538] [2021-01-06 11:02:45,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 11:02:45,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 11:02:45,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:02:45,268 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 27 states. [2021-01-06 11:02:45,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:45,874 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-01-06 11:02:45,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 11:02:45,875 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2021-01-06 11:02:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:45,876 INFO L225 Difference]: With dead ends: 48 [2021-01-06 11:02:45,876 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 11:02:45,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 11:02:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 11:02:45,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 11:02:45,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 11:02:45,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-01-06 11:02:45,896 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2021-01-06 11:02:45,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:45,896 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-01-06 11:02:45,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 11:02:45,896 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-01-06 11:02:45,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 11:02:45,899 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:45,899 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:46,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:46,115 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:46,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:46,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1022889845, now seen corresponding path program 2 times [2021-01-06 11:02:46,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:46,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979934671] [2021-01-06 11:02:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 11:02:46,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979934671] [2021-01-06 11:02:46,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753793190] [2021-01-06 11:02:46,230 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 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 11:02:46,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:02:46,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:46,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:02:46,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 11:02:46,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:46,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 11:02:46,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315772691] [2021-01-06 11:02:46,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 11:02:46,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:46,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 11:02:46,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:02:46,406 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2021-01-06 11:02:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:46,477 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-01-06 11:02:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:02:46,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2021-01-06 11:02:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:46,478 INFO L225 Difference]: With dead ends: 62 [2021-01-06 11:02:46,478 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 11:02:46,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:02:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 11:02:46,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2021-01-06 11:02:46,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 11:02:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-01-06 11:02:46,485 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2021-01-06 11:02:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:46,485 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-01-06 11:02:46,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 11:02:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-01-06 11:02:46,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 11:02:46,486 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:46,486 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:46,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 11:02:46,701 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:46,702 INFO L82 PathProgramCache]: Analyzing trace with hash -272988574, now seen corresponding path program 5 times [2021-01-06 11:02:46,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:46,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775695866] [2021-01-06 11:02:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:47,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775695866] [2021-01-06 11:02:47,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880058271] [2021-01-06 11:02:47,055 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 11:02:47,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 11:02:47,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:47,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 11:02:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:47,203 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:47,204 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:47,214 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:47,215 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:47,215 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-01-06 11:02:47,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:02:47,295 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2021-01-06 11:02:47,303 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:47,312 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:47,314 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:47,314 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:21 [2021-01-06 11:02:47,434 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:47,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:02:47,440 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:47,442 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:02:47,444 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:02:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:47,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:47,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2021-01-06 11:02:47,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110422366] [2021-01-06 11:02:47,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 11:02:47,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:47,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 11:02:47,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:02:47,474 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 20 states. [2021-01-06 11:02:48,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:48,027 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-01-06 11:02:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 11:02:48,028 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2021-01-06 11:02:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:48,029 INFO L225 Difference]: With dead ends: 43 [2021-01-06 11:02:48,029 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 11:02:48,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:02:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 11:02:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-01-06 11:02:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 11:02:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-01-06 11:02:48,038 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2021-01-06 11:02:48,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:48,038 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-01-06 11:02:48,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 11:02:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-01-06 11:02:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 11:02:48,039 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:48,039 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:48,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 11:02:48,254 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:48,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:48,255 INFO L82 PathProgramCache]: Analyzing trace with hash -246527464, now seen corresponding path program 6 times [2021-01-06 11:02:48,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:48,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289038193] [2021-01-06 11:02:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:48,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289038193] [2021-01-06 11:02:48,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945276819] [2021-01-06 11:02:48,607 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 11:02:48,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 11:02:48,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:48,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 11:02:48,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:48,943 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:48,943 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:48,950 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:48,951 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:48,951 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:02:49,375 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:49,379 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:02:49,382 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:49,403 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:02:49,409 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 11:02:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:49,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:49,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-01-06 11:02:49,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116521166] [2021-01-06 11:02:49,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 11:02:49,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:49,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 11:02:49,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-01-06 11:02:49,459 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 31 states. [2021-01-06 11:02:50,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:50,325 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-01-06 11:02:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 11:02:50,326 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2021-01-06 11:02:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:50,327 INFO L225 Difference]: With dead ends: 59 [2021-01-06 11:02:50,327 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 11:02:50,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 11:02:50,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 11:02:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-01-06 11:02:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 11:02:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-01-06 11:02:50,336 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2021-01-06 11:02:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:50,336 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-01-06 11:02:50,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 11:02:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-01-06 11:02:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 11:02:50,337 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:50,337 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:50,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 11:02:50,553 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:50,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:50,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1080336719, now seen corresponding path program 3 times [2021-01-06 11:02:50,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:50,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403213680] [2021-01-06 11:02:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 11:02:50,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403213680] [2021-01-06 11:02:50,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19638737] [2021-01-06 11:02:50,640 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 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 11:02:50,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 11:02:50,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:50,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 11:02:50,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 11:02:50,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:50,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 11:02:50,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645847261] [2021-01-06 11:02:50,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 11:02:50,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:50,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 11:02:50,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:02:50,864 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 17 states. [2021-01-06 11:02:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:50,959 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2021-01-06 11:02:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:02:50,960 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2021-01-06 11:02:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:50,961 INFO L225 Difference]: With dead ends: 77 [2021-01-06 11:02:50,961 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 11:02:50,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:02:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 11:02:50,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-01-06 11:02:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 11:02:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-01-06 11:02:50,973 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2021-01-06 11:02:50,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:50,974 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-01-06 11:02:50,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 11:02:50,974 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-01-06 11:02:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 11:02:50,978 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:50,978 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:51,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:51,192 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1821925934, now seen corresponding path program 7 times [2021-01-06 11:02:51,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:51,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084787443] [2021-01-06 11:02:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:51,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084787443] [2021-01-06 11:02:51,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366159877] [2021-01-06 11:02:51,528 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 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 11:02:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:51,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 11:02:51,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:51,653 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:51,654 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:51,662 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:51,663 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:51,664 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-01-06 11:02:51,734 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:51,735 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2021-01-06 11:02:51,737 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:51,738 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:51,765 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2021-01-06 11:02:51,767 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:02:51,768 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2021-01-06 11:02:51,939 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:51,941 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:51,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:51,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 25 [2021-01-06 11:02:51,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362254923] [2021-01-06 11:02:51,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:02:51,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:51,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:02:51,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:02:51,983 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 25 states. [2021-01-06 11:02:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:52,796 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-01-06 11:02:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 11:02:52,796 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2021-01-06 11:02:52,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:52,797 INFO L225 Difference]: With dead ends: 50 [2021-01-06 11:02:52,797 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 11:02:52,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 11:02:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 11:02:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-01-06 11:02:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 11:02:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-01-06 11:02:52,805 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2021-01-06 11:02:52,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:52,805 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-01-06 11:02:52,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:02:52,805 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-01-06 11:02:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 11:02:52,806 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:52,806 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:53,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 11:02:53,011 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:53,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1086466440, now seen corresponding path program 8 times [2021-01-06 11:02:53,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:53,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858353915] [2021-01-06 11:02:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:53,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858353915] [2021-01-06 11:02:53,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524008140] [2021-01-06 11:02:53,447 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 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 11:02:53,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:02:53,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:53,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 11:02:53,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:53,854 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:53,855 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:53,861 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:53,865 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:53,865 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:02:54,415 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:54,420 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:02:54,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:54,428 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:02:54,431 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 11:02:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:54,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:54,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-01-06 11:02:54,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277909258] [2021-01-06 11:02:54,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 11:02:54,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:54,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 11:02:54,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 11:02:54,485 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 37 states. [2021-01-06 11:02:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:55,792 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2021-01-06 11:02:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 11:02:55,792 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2021-01-06 11:02:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:55,793 INFO L225 Difference]: With dead ends: 70 [2021-01-06 11:02:55,793 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 11:02:55,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=275, Invalid=1887, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 11:02:55,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 11:02:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-01-06 11:02:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 11:02:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-01-06 11:02:55,803 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2021-01-06 11:02:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:55,803 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-01-06 11:02:55,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 11:02:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-01-06 11:02:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 11:02:55,804 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:55,804 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:56,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:56,018 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:56,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1187871967, now seen corresponding path program 4 times [2021-01-06 11:02:56,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:56,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693759545] [2021-01-06 11:02:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 11:02:56,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693759545] [2021-01-06 11:02:56,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184130713] [2021-01-06 11:02:56,123 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 11:02:56,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:02:56,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:56,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 11:02:56,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:56,413 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:56,414 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:56,420 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:56,421 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:56,422 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-01-06 11:02:56,490 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:56,490 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:02:56,492 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:56,493 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:56,514 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2021-01-06 11:02:56,516 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:56,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2021-01-06 11:02:56,791 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:56,793 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:56,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:56,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 22] total 31 [2021-01-06 11:02:56,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767013345] [2021-01-06 11:02:56,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 11:02:56,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:56,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 11:02:56,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-01-06 11:02:56,832 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 31 states. [2021-01-06 11:02:58,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:58,505 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2021-01-06 11:02:58,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 11:02:58,505 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2021-01-06 11:02:58,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:58,506 INFO L225 Difference]: With dead ends: 106 [2021-01-06 11:02:58,506 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 11:02:58,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=439, Invalid=3721, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 11:02:58,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 11:02:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2021-01-06 11:02:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 11:02:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-01-06 11:02:58,517 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2021-01-06 11:02:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:58,517 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-01-06 11:02:58,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 11:02:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-01-06 11:02:58,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 11:02:58,518 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:58,518 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:58,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:58,733 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:58,734 INFO L82 PathProgramCache]: Analyzing trace with hash -707076540, now seen corresponding path program 9 times [2021-01-06 11:02:58,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:58,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39254820] [2021-01-06 11:02:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 24 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:59,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39254820] [2021-01-06 11:02:59,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33079058] [2021-01-06 11:02:59,373 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 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 11:02:59,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 11:02:59,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:59,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 11:02:59,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:59,952 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:59,952 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:59,958 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:59,959 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:59,959 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:03:00,601 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:00,603 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:03:00,604 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:00,606 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:03:00,607 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 11:03:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 41 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:00,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:00,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 43 [2021-01-06 11:03:00,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831774147] [2021-01-06 11:03:00,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 11:03:00,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:00,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 11:03:00,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 11:03:00,663 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 43 states. [2021-01-06 11:03:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:02,230 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2021-01-06 11:03:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 11:03:02,230 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2021-01-06 11:03:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:02,231 INFO L225 Difference]: With dead ends: 81 [2021-01-06 11:03:02,231 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 11:03:02,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=354, Invalid=2616, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 11:03:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 11:03:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-01-06 11:03:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 11:03:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-01-06 11:03:02,241 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2021-01-06 11:03:02,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:02,241 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-01-06 11:03:02,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 11:03:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-01-06 11:03:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 11:03:02,242 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:02,242 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:02,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 11:03:02,458 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:02,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:02,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1660279261, now seen corresponding path program 5 times [2021-01-06 11:03:02,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:02,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213344419] [2021-01-06 11:03:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-01-06 11:03:02,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213344419] [2021-01-06 11:03:02,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712068787] [2021-01-06 11:03:02,580 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 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 11:03:02,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 11:03:02,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:02,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 11:03:02,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-01-06 11:03:02,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:02,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 11:03:02,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273820203] [2021-01-06 11:03:02,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 11:03:02,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:02,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 11:03:02,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:03:02,870 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2021-01-06 11:03:02,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:02,961 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-01-06 11:03:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:03:02,961 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2021-01-06 11:03:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:02,962 INFO L225 Difference]: With dead ends: 107 [2021-01-06 11:03:02,962 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 11:03:02,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:03:02,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 11:03:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2021-01-06 11:03:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 11:03:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-01-06 11:03:02,971 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2021-01-06 11:03:02,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:02,971 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-01-06 11:03:02,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 11:03:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-01-06 11:03:02,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 11:03:02,972 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:02,972 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:03,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:03,187 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:03,187 INFO L82 PathProgramCache]: Analyzing trace with hash -988666754, now seen corresponding path program 10 times [2021-01-06 11:03:03,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:03,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405116542] [2021-01-06 11:03:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:03,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405116542] [2021-01-06 11:03:03,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160206321] [2021-01-06 11:03:03,712 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 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 11:03:03,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:03:03,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:03,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 11:03:03,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:03,827 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:03:03,828 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:03,836 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:03,837 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:03,837 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-01-06 11:03:03,914 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:03,914 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2021-01-06 11:03:03,916 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:03,918 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:03,947 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2021-01-06 11:03:03,949 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:03:03,949 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2021-01-06 11:03:04,260 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:04,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:04,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:04,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 33 [2021-01-06 11:03:04,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859389767] [2021-01-06 11:03:04,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 11:03:04,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:04,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 11:03:04,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 11:03:04,310 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 33 states. [2021-01-06 11:03:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:05,631 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-01-06 11:03:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 11:03:05,631 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 52 [2021-01-06 11:03:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:05,632 INFO L225 Difference]: With dead ends: 64 [2021-01-06 11:03:05,632 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 11:03:05,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=236, Invalid=2214, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 11:03:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 11:03:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-01-06 11:03:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 11:03:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-01-06 11:03:05,641 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2021-01-06 11:03:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:05,641 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-01-06 11:03:05,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 11:03:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-01-06 11:03:05,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 11:03:05,642 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:05,642 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:05,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 11:03:05,846 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:05,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:05,847 INFO L82 PathProgramCache]: Analyzing trace with hash -147752396, now seen corresponding path program 11 times [2021-01-06 11:03:05,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:05,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404403966] [2021-01-06 11:03:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 40 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:06,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404403966] [2021-01-06 11:03:06,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247588659] [2021-01-06 11:03:06,562 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 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 11:03:06,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 11:03:06,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:06,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 11:03:06,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:07,293 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:03:07,294 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:07,298 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:07,299 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:07,299 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2021-01-06 11:03:07,887 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:07,888 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:07,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:07,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 50 [2021-01-06 11:03:07,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657654186] [2021-01-06 11:03:07,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 11:03:07,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:07,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 11:03:07,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2274, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 11:03:07,948 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 50 states. [2021-01-06 11:03:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:09,958 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2021-01-06 11:03:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 11:03:09,959 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 56 [2021-01-06 11:03:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:09,960 INFO L225 Difference]: With dead ends: 96 [2021-01-06 11:03:09,960 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 11:03:09,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=372, Invalid=4320, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 11:03:09,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 11:03:09,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-01-06 11:03:09,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 11:03:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-01-06 11:03:09,970 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 56 [2021-01-06 11:03:09,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:09,971 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-01-06 11:03:09,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 11:03:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-01-06 11:03:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 11:03:09,971 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:09,971 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:10,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 11:03:10,187 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:10,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1103207117, now seen corresponding path program 6 times [2021-01-06 11:03:10,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:10,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977551020] [2021-01-06 11:03:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 11:03:10,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977551020] [2021-01-06 11:03:10,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823461593] [2021-01-06 11:03:10,311 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 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 11:03:10,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 11:03:10,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:10,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:03:10,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 11:03:10,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:10,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-01-06 11:03:10,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305635800] [2021-01-06 11:03:10,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 11:03:10,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:10,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 11:03:10,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:03:10,723 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 23 states. [2021-01-06 11:03:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:10,838 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2021-01-06 11:03:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:03:10,839 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2021-01-06 11:03:10,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:10,839 INFO L225 Difference]: With dead ends: 122 [2021-01-06 11:03:10,839 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 11:03:10,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:03:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 11:03:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2021-01-06 11:03:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 11:03:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-01-06 11:03:10,847 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 58 [2021-01-06 11:03:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:10,847 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-01-06 11:03:10,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 11:03:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-01-06 11:03:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 11:03:10,848 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:10,848 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:11,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:11,049 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:11,050 INFO L82 PathProgramCache]: Analyzing trace with hash -412901702, now seen corresponding path program 12 times [2021-01-06 11:03:11,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:11,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477794678] [2021-01-06 11:03:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:11,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477794678] [2021-01-06 11:03:11,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609633154] [2021-01-06 11:03:11,725 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 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 11:03:12,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 11:03:12,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:12,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 11:03:12,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:12,312 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:03:12,315 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:12,325 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:12,325 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:12,326 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-01-06 11:03:12,446 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:12,446 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 56 [2021-01-06 11:03:12,448 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:12,449 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:12,469 INFO L625 ElimStorePlain]: treesize reduction 22, result has 54.2 percent of original size [2021-01-06 11:03:12,470 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:12,470 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-01-06 11:03:12,642 INFO L348 Elim1Store]: treesize reduction 12, result has 86.8 percent of original size [2021-01-06 11:03:12,642 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 95 [2021-01-06 11:03:12,644 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:12,646 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:12,647 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:12,673 INFO L625 ElimStorePlain]: treesize reduction 43, result has 42.7 percent of original size [2021-01-06 11:03:12,674 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:12,674 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:21 [2021-01-06 11:03:13,150 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:13,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:13,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:03:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:13,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:13,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2021-01-06 11:03:13,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389655351] [2021-01-06 11:03:13,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 11:03:13,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:13,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 11:03:13,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2314, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 11:03:13,459 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 50 states. [2021-01-06 11:03:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:15,948 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-01-06 11:03:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 11:03:15,949 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 59 [2021-01-06 11:03:15,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:15,954 INFO L225 Difference]: With dead ends: 71 [2021-01-06 11:03:15,954 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 11:03:15,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=337, Invalid=4493, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 11:03:15,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 11:03:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2021-01-06 11:03:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 11:03:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-01-06 11:03:15,963 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2021-01-06 11:03:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:15,963 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-01-06 11:03:15,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 11:03:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-01-06 11:03:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 11:03:15,964 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:15,964 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:16,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 11:03:16,165 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:16,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:16,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1132689008, now seen corresponding path program 13 times [2021-01-06 11:03:16,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:16,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353567374] [2021-01-06 11:03:16,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 60 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:17,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353567374] [2021-01-06 11:03:17,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640556998] [2021-01-06 11:03:17,100 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 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 11:03:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:17,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 11:03:17,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:17,981 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:03:17,981 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:17,986 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:17,987 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:17,987 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2021-01-06 11:03:18,733 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:18,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:18,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:18,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 56 [2021-01-06 11:03:18,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330666862] [2021-01-06 11:03:18,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 11:03:18,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:18,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 11:03:18,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2878, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 11:03:18,815 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 56 states. [2021-01-06 11:03:21,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:21,358 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-01-06 11:03:21,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 11:03:21,359 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2021-01-06 11:03:21,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:21,360 INFO L225 Difference]: With dead ends: 107 [2021-01-06 11:03:21,360 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 11:03:21,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=424, Invalid=5428, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 11:03:21,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 11:03:21,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-01-06 11:03:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 11:03:21,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-01-06 11:03:21,370 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2021-01-06 11:03:21,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:21,370 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-01-06 11:03:21,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 11:03:21,370 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-01-06 11:03:21,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 11:03:21,371 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:21,371 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:21,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:21,586 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:21,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:21,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1692837623, now seen corresponding path program 7 times [2021-01-06 11:03:21,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:21,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813239845] [2021-01-06 11:03:21,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-01-06 11:03:21,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813239845] [2021-01-06 11:03:21,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096543984] [2021-01-06 11:03:21,746 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 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 11:03:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:21,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 11:03:21,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-01-06 11:03:22,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:22,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-01-06 11:03:22,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455040562] [2021-01-06 11:03:22,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:03:22,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:22,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:03:22,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:03:22,039 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 25 states. [2021-01-06 11:03:22,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:22,167 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2021-01-06 11:03:22,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:03:22,167 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2021-01-06 11:03:22,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:22,168 INFO L225 Difference]: With dead ends: 137 [2021-01-06 11:03:22,168 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 11:03:22,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:03:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 11:03:22,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 69. [2021-01-06 11:03:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 11:03:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-01-06 11:03:22,179 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2021-01-06 11:03:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:22,179 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-01-06 11:03:22,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:03:22,179 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-01-06 11:03:22,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 11:03:22,180 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:22,180 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:22,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 11:03:22,395 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:22,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:22,395 INFO L82 PathProgramCache]: Analyzing trace with hash 557731626, now seen corresponding path program 14 times [2021-01-06 11:03:22,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:22,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631564737] [2021-01-06 11:03:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:23,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631564737] [2021-01-06 11:03:23,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901598397] [2021-01-06 11:03:23,190 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 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 11:03:23,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:03:23,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:23,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 11:03:23,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:23,337 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:03:23,339 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:23,347 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:23,348 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:23,348 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-01-06 11:03:23,447 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:23,448 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2021-01-06 11:03:23,449 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:23,450 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:23,482 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2021-01-06 11:03:23,484 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:03:23,484 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2021-01-06 11:03:24,026 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:24,030 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:24,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:24,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 41 [2021-01-06 11:03:24,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528180318] [2021-01-06 11:03:24,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 11:03:24,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:24,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 11:03:24,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1531, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 11:03:24,098 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 41 states. [2021-01-06 11:03:26,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:26,178 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2021-01-06 11:03:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 11:03:26,179 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 66 [2021-01-06 11:03:26,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:26,179 INFO L225 Difference]: With dead ends: 78 [2021-01-06 11:03:26,179 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 11:03:26,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=292, Invalid=3490, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 11:03:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 11:03:26,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-01-06 11:03:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 11:03:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-01-06 11:03:26,190 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 66 [2021-01-06 11:03:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:26,190 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-01-06 11:03:26,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 11:03:26,190 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-01-06 11:03:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 11:03:26,191 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:26,191 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:26,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 11:03:26,405 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:26,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:26,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1229951264, now seen corresponding path program 15 times [2021-01-06 11:03:26,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:26,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331146471] [2021-01-06 11:03:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 84 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:27,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331146471] [2021-01-06 11:03:27,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369327081] [2021-01-06 11:03:27,507 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 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 11:03:27,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 11:03:27,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:27,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 11:03:27,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:28,702 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:03:28,703 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:28,710 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:28,711 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:28,711 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:03:29,988 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:29,989 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:03:29,990 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:29,992 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:03:29,993 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 11:03:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 116 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:30,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:30,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 61 [2021-01-06 11:03:30,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990603173] [2021-01-06 11:03:30,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 11:03:30,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:30,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 11:03:30,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=3348, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 11:03:30,087 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 61 states. [2021-01-06 11:03:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:32,873 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2021-01-06 11:03:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 11:03:32,874 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 70 [2021-01-06 11:03:32,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:32,875 INFO L225 Difference]: With dead ends: 114 [2021-01-06 11:03:32,875 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 11:03:32,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=594, Invalid=5106, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 11:03:32,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 11:03:32,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-01-06 11:03:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 11:03:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-01-06 11:03:32,885 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2021-01-06 11:03:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:32,886 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-01-06 11:03:32,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 11:03:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-01-06 11:03:32,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 11:03:32,886 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:32,886 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:33,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:33,087 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:33,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:33,088 INFO L82 PathProgramCache]: Analyzing trace with hash 832919161, now seen corresponding path program 8 times [2021-01-06 11:03:33,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:33,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260272497] [2021-01-06 11:03:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 11:03:33,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260272497] [2021-01-06 11:03:33,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146591016] [2021-01-06 11:03:33,260 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 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 11:03:33,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:03:33,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:33,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:03:33,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 11:03:33,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:33,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-01-06 11:03:33,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681125153] [2021-01-06 11:03:33,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 11:03:33,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:33,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 11:03:33,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:03:33,667 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 27 states. [2021-01-06 11:03:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:33,816 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2021-01-06 11:03:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:03:33,817 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2021-01-06 11:03:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:33,818 INFO L225 Difference]: With dead ends: 152 [2021-01-06 11:03:33,818 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 11:03:33,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:03:33,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 11:03:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 76. [2021-01-06 11:03:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 11:03:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-01-06 11:03:33,832 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2021-01-06 11:03:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:33,832 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-01-06 11:03:33,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 11:03:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-01-06 11:03:33,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 11:03:33,833 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:33,833 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:34,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:34,047 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:34,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1261252838, now seen corresponding path program 16 times [2021-01-06 11:03:34,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:34,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895075171] [2021-01-06 11:03:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:34,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895075171] [2021-01-06 11:03:34,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717559750] [2021-01-06 11:03:34,978 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 11:03:35,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:03:35,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:35,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 11:03:35,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:35,121 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:03:35,122 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:35,131 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:35,132 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:35,132 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-01-06 11:03:35,238 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:35,239 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2021-01-06 11:03:35,240 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:35,242 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:35,274 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2021-01-06 11:03:35,276 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:03:35,276 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2021-01-06 11:03:35,949 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:35,950 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:36,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:36,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 45 [2021-01-06 11:03:36,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747678322] [2021-01-06 11:03:36,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 11:03:36,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 11:03:36,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1860, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 11:03:36,024 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 45 states. [2021-01-06 11:03:38,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:38,488 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2021-01-06 11:03:38,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 11:03:38,488 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 73 [2021-01-06 11:03:38,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:38,489 INFO L225 Difference]: With dead ends: 85 [2021-01-06 11:03:38,489 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 11:03:38,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=320, Invalid=4236, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 11:03:38,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 11:03:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-01-06 11:03:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 11:03:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-01-06 11:03:38,502 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2021-01-06 11:03:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:38,502 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-01-06 11:03:38,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 11:03:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-01-06 11:03:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 11:03:38,503 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:38,503 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:38,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 11:03:38,709 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1499458916, now seen corresponding path program 17 times [2021-01-06 11:03:38,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:38,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389551817] [2021-01-06 11:03:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 112 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:40,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389551817] [2021-01-06 11:03:40,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590619356] [2021-01-06 11:03:40,113 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 11:03:40,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 11:03:40,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:40,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 11:03:40,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:41,561 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:03:41,562 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:41,567 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:41,567 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:41,568 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2021-01-06 11:03:42,719 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:42,722 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:42,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:42,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 68 [2021-01-06 11:03:42,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631308172] [2021-01-06 11:03:42,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 11:03:42,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:42,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 11:03:42,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=4299, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 11:03:42,831 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 68 states. [2021-01-06 11:03:46,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:46,371 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2021-01-06 11:03:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 11:03:46,372 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 77 [2021-01-06 11:03:46,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:46,373 INFO L225 Difference]: With dead ends: 129 [2021-01-06 11:03:46,373 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 11:03:46,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=546, Invalid=8010, Unknown=0, NotChecked=0, Total=8556 [2021-01-06 11:03:46,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 11:03:46,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-01-06 11:03:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 11:03:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2021-01-06 11:03:46,385 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2021-01-06 11:03:46,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:46,385 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2021-01-06 11:03:46,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 11:03:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2021-01-06 11:03:46,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 11:03:46,386 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:46,386 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:46,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:46,587 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:46,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1604461515, now seen corresponding path program 9 times [2021-01-06 11:03:46,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:46,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202095133] [2021-01-06 11:03:46,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 11:03:46,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202095133] [2021-01-06 11:03:46,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579852714] [2021-01-06 11:03:46,787 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 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 11:03:47,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-01-06 11:03:47,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:47,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 11:03:47,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 11:03:47,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:47,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-01-06 11:03:47,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814403642] [2021-01-06 11:03:47,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 11:03:47,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:47,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 11:03:47,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:03:47,348 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 29 states. [2021-01-06 11:03:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:47,528 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2021-01-06 11:03:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:03:47,529 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2021-01-06 11:03:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:47,530 INFO L225 Difference]: With dead ends: 167 [2021-01-06 11:03:47,530 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 11:03:47,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:03:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 11:03:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 83. [2021-01-06 11:03:47,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 11:03:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2021-01-06 11:03:47,545 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2021-01-06 11:03:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:47,545 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2021-01-06 11:03:47,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 11:03:47,545 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2021-01-06 11:03:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 11:03:47,546 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:47,546 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:47,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 11:03:47,760 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:47,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:47,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1642864086, now seen corresponding path program 18 times [2021-01-06 11:03:47,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:47,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358729764] [2021-01-06 11:03:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:48,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358729764] [2021-01-06 11:03:48,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214104316] [2021-01-06 11:03:48,953 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 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 11:03:49,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 11:03:49,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:49,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 11:03:49,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:49,332 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:03:49,334 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:49,343 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:49,344 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:49,344 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-01-06 11:03:49,471 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:49,472 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2021-01-06 11:03:49,473 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:49,475 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:49,508 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2021-01-06 11:03:49,510 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:03:49,510 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2021-01-06 11:03:50,291 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:50,293 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:50,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:50,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 49 [2021-01-06 11:03:50,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822302580] [2021-01-06 11:03:50,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 11:03:50,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:50,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 11:03:50,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2220, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 11:03:50,379 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 49 states. [2021-01-06 11:03:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:53,273 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-01-06 11:03:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 11:03:53,274 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 80 [2021-01-06 11:03:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:53,275 INFO L225 Difference]: With dead ends: 92 [2021-01-06 11:03:53,275 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 11:03:53,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=351, Invalid=5051, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 11:03:53,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 11:03:53,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2021-01-06 11:03:53,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 11:03:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-01-06 11:03:53,292 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 80 [2021-01-06 11:03:53,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:53,292 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-01-06 11:03:53,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 11:03:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-01-06 11:03:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 11:03:53,293 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:53,293 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:53,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 11:03:53,507 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:53,508 INFO L82 PathProgramCache]: Analyzing trace with hash 960432012, now seen corresponding path program 19 times [2021-01-06 11:03:53,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:53,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108048790] [2021-01-06 11:03:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 144 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:55,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108048790] [2021-01-06 11:03:55,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944412196] [2021-01-06 11:03:55,181 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 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 11:03:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:55,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 11:03:55,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:56,886 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:03:56,887 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:56,894 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:56,894 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:56,895 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2021-01-06 11:03:58,285 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:58,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:58,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:58,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 74 [2021-01-06 11:03:58,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450403678] [2021-01-06 11:03:58,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-01-06 11:03:58,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:58,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-01-06 11:03:58,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=5116, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 11:03:58,399 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 74 states. [2021-01-06 11:04:02,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:02,941 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2021-01-06 11:04:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 11:04:02,942 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 84 [2021-01-06 11:04:02,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:02,943 INFO L225 Difference]: With dead ends: 140 [2021-01-06 11:04:02,943 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 11:04:02,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=607, Invalid=9493, Unknown=0, NotChecked=0, Total=10100 [2021-01-06 11:04:02,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 11:04:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-01-06 11:04:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 11:04:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-01-06 11:04:02,961 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2021-01-06 11:04:02,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:02,961 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-01-06 11:04:02,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2021-01-06 11:04:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-01-06 11:04:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 11:04:02,962 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:02,962 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:03,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 11:04:03,176 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1155380773, now seen corresponding path program 10 times [2021-01-06 11:04:03,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:03,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76730872] [2021-01-06 11:04:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 11:04:03,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76730872] [2021-01-06 11:04:03,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098699766] [2021-01-06 11:04:03,403 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 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 11:04:03,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:04:03,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:03,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 73 conjunts are in the unsatisfiable core [2021-01-06 11:04:03,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:04,290 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:04:04,291 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:04,299 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:04,302 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:04,302 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-01-06 11:04:04,439 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:04,440 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:04:04,441 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:04,443 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:04,467 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2021-01-06 11:04:04,469 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:04,469 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2021-01-06 11:04:05,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:05,441 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:05,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:05,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 40] total 55 [2021-01-06 11:04:05,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465104390] [2021-01-06 11:04:05,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 11:04:05,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:05,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 11:04:05,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2746, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 11:04:05,525 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 55 states. [2021-01-06 11:04:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:10,270 INFO L93 Difference]: Finished difference Result 196 states and 202 transitions. [2021-01-06 11:04:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 11:04:10,271 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 86 [2021-01-06 11:04:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:10,272 INFO L225 Difference]: With dead ends: 196 [2021-01-06 11:04:10,272 INFO L226 Difference]: Without dead ends: 151 [2021-01-06 11:04:10,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3315 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=856, Invalid=11800, Unknown=0, NotChecked=0, Total=12656 [2021-01-06 11:04:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-01-06 11:04:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 94. [2021-01-06 11:04:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 11:04:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2021-01-06 11:04:10,289 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 86 [2021-01-06 11:04:10,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:10,289 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2021-01-06 11:04:10,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 11:04:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2021-01-06 11:04:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 11:04:10,290 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:10,290 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:10,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 11:04:10,504 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:10,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:10,504 INFO L82 PathProgramCache]: Analyzing trace with hash -762793272, now seen corresponding path program 20 times [2021-01-06 11:04:10,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:10,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421174840] [2021-01-06 11:04:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 180 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:12,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421174840] [2021-01-06 11:04:12,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095783818] [2021-01-06 11:04:12,548 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 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 11:04:12,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:04:12,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:12,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 11:04:12,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:14,422 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:04:14,424 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:14,433 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:14,436 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:14,436 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:04:16,217 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:16,219 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:16,221 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:16,222 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:16,223 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 11:04:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 221 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:16,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:16,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-01-06 11:04:16,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53070233] [2021-01-06 11:04:16,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-01-06 11:04:16,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:16,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-01-06 11:04:16,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=6201, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 11:04:16,339 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 82 states. [2021-01-06 11:04:21,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:21,275 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2021-01-06 11:04:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 11:04:21,276 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 91 [2021-01-06 11:04:21,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:21,277 INFO L225 Difference]: With dead ends: 146 [2021-01-06 11:04:21,277 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 11:04:21,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3426 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1021, Invalid=10109, Unknown=0, NotChecked=0, Total=11130 [2021-01-06 11:04:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 11:04:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-01-06 11:04:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 11:04:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-01-06 11:04:21,290 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 91 [2021-01-06 11:04:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:21,290 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-01-06 11:04:21,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2021-01-06 11:04:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-01-06 11:04:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 11:04:21,291 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:21,291 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:21,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 11:04:21,492 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:21,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:21,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1377526625, now seen corresponding path program 11 times [2021-01-06 11:04:21,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:21,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493637960] [2021-01-06 11:04:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-01-06 11:04:21,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493637960] [2021-01-06 11:04:21,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662055564] [2021-01-06 11:04:21,794 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 11:04:22,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-01-06 11:04:22,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:22,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 11:04:22,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-01-06 11:04:22,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:22,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-01-06 11:04:22,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252495503] [2021-01-06 11:04:22,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 11:04:22,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:22,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 11:04:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 11:04:22,551 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2021-01-06 11:04:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:22,775 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2021-01-06 11:04:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 11:04:22,776 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 93 [2021-01-06 11:04:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:22,777 INFO L225 Difference]: With dead ends: 197 [2021-01-06 11:04:22,777 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 11:04:22,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 11:04:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 11:04:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 97. [2021-01-06 11:04:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 11:04:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2021-01-06 11:04:22,794 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 93 [2021-01-06 11:04:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:22,794 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2021-01-06 11:04:22,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 11:04:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2021-01-06 11:04:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 11:04:22,795 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:22,795 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:23,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 11:04:23,009 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:23,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:23,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1575251838, now seen corresponding path program 21 times [2021-01-06 11:04:23,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:23,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194107230] [2021-01-06 11:04:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:25,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194107230] [2021-01-06 11:04:25,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255844421] [2021-01-06 11:04:25,131 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 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 11:04:25,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 11:04:25,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:25,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 11:04:25,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:26,311 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:04:26,313 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:26,321 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:26,322 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:26,323 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-01-06 11:04:26,522 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:26,523 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 56 [2021-01-06 11:04:26,524 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:26,526 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:26,551 INFO L625 ElimStorePlain]: treesize reduction 22, result has 54.2 percent of original size [2021-01-06 11:04:26,552 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:26,553 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-01-06 11:04:26,822 INFO L348 Elim1Store]: treesize reduction 12, result has 86.8 percent of original size [2021-01-06 11:04:26,824 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 95 [2021-01-06 11:04:26,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:26,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:26,829 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:26,831 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:26,862 INFO L625 ElimStorePlain]: treesize reduction 43, result has 42.7 percent of original size [2021-01-06 11:04:26,863 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:26,864 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:21 [2021-01-06 11:04:28,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:28,973 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:28,974 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:29,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:29,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 35] total 76 [2021-01-06 11:04:29,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855872579] [2021-01-06 11:04:29,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-01-06 11:04:29,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:29,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-01-06 11:04:29,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5480, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 11:04:29,106 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 76 states. [2021-01-06 11:04:37,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:37,988 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2021-01-06 11:04:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-01-06 11:04:37,989 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 94 [2021-01-06 11:04:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:37,990 INFO L225 Difference]: With dead ends: 215 [2021-01-06 11:04:37,990 INFO L226 Difference]: Without dead ends: 213 [2021-01-06 11:04:37,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3667 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=679, Invalid=14573, Unknown=0, NotChecked=0, Total=15252 [2021-01-06 11:04:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-01-06 11:04:38,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 106. [2021-01-06 11:04:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 11:04:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2021-01-06 11:04:38,009 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 94 [2021-01-06 11:04:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:38,009 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2021-01-06 11:04:38,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2021-01-06 11:04:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2021-01-06 11:04:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 11:04:38,010 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:38,010 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:38,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 11:04:38,224 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:38,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:38,225 INFO L82 PathProgramCache]: Analyzing trace with hash 433931320, now seen corresponding path program 22 times [2021-01-06 11:04:38,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:38,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636962294] [2021-01-06 11:04:38,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 220 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:40,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636962294] [2021-01-06 11:04:40,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776655942] [2021-01-06 11:04:40,812 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 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 11:04:40,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:04:40,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:40,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 81 conjunts are in the unsatisfiable core [2021-01-06 11:04:40,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:43,386 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:04:43,387 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:43,393 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:43,394 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:43,394 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2021-01-06 11:04:45,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:45,533 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:45,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:45,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 86 [2021-01-06 11:04:45,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142464766] [2021-01-06 11:04:45,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-01-06 11:04:45,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:45,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-01-06 11:04:45,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=6963, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 11:04:45,687 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 86 states. [2021-01-06 11:04:52,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:52,674 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2021-01-06 11:04:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 11:04:52,675 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 98 [2021-01-06 11:04:52,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:52,677 INFO L225 Difference]: With dead ends: 166 [2021-01-06 11:04:52,677 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 11:04:52,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2818 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=744, Invalid=12828, Unknown=0, NotChecked=0, Total=13572 [2021-01-06 11:04:52,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 11:04:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2021-01-06 11:04:52,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 11:04:52,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-01-06 11:04:52,696 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 98 [2021-01-06 11:04:52,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:52,696 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-01-06 11:04:52,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2021-01-06 11:04:52,696 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-01-06 11:04:52,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 11:04:52,697 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:52,697 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:52,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:52,910 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:52,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:52,911 INFO L82 PathProgramCache]: Analyzing trace with hash 8544545, now seen corresponding path program 12 times [2021-01-06 11:04:52,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:52,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718085180] [2021-01-06 11:04:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-01-06 11:04:53,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718085180] [2021-01-06 11:04:53,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904922169] [2021-01-06 11:04:53,311 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 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 11:04:54,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 11:04:54,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:54,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 11:04:54,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-01-06 11:04:54,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:54,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-01-06 11:04:54,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882638996] [2021-01-06 11:04:54,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 11:04:54,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:54,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 11:04:54,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 11:04:54,709 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 37 states. [2021-01-06 11:04:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:54,952 INFO L93 Difference]: Finished difference Result 261 states and 267 transitions. [2021-01-06 11:04:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 11:04:54,954 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 99 [2021-01-06 11:04:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:54,955 INFO L225 Difference]: With dead ends: 261 [2021-01-06 11:04:54,955 INFO L226 Difference]: Without dead ends: 207 [2021-01-06 11:04:54,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 11:04:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-01-06 11:04:54,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 108. [2021-01-06 11:04:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 11:04:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2021-01-06 11:04:54,976 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 99 [2021-01-06 11:04:54,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:54,976 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2021-01-06 11:04:54,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 11:04:54,976 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2021-01-06 11:04:54,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 11:04:54,977 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:54,977 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:55,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:55,178 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:55,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:55,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1064023358, now seen corresponding path program 23 times [2021-01-06 11:04:55,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:55,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268457824] [2021-01-06 11:04:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 3 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268457824] [2021-01-06 11:04:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098102104] [2021-01-06 11:04:57,832 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 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 11:04:58,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 11:04:58,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:58,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 82 conjunts are in the unsatisfiable core [2021-01-06 11:04:58,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:00,174 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:05:00,176 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:00,185 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:00,186 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:00,186 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:05:00,405 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:00,405 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:05:00,407 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:00,409 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:00,437 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2021-01-06 11:05:00,439 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:00,439 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:13 [2021-01-06 11:05:00,567 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:00,568 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:05:00,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:00,571 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:00,597 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2021-01-06 11:05:00,599 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:00,599 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:13 [2021-01-06 11:05:00,732 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:00,733 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:05:00,735 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:00,736 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:00,763 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2021-01-06 11:05:00,767 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:00,767 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2021-01-06 11:05:02,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:02,394 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 7 proven. 627 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:02,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:02,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2021-01-06 11:05:02,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503494278] [2021-01-06 11:05:02,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-01-06 11:05:02,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:02,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-01-06 11:05:02,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=7354, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 11:05:02,516 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 88 states. [2021-01-06 11:05:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:10,683 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2021-01-06 11:05:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 11:05:10,684 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 100 [2021-01-06 11:05:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:10,686 INFO L225 Difference]: With dead ends: 159 [2021-01-06 11:05:10,686 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 11:05:10,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=738, Invalid=13068, Unknown=0, NotChecked=0, Total=13806 [2021-01-06 11:05:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 11:05:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 107. [2021-01-06 11:05:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 11:05:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2021-01-06 11:05:10,709 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2021-01-06 11:05:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:10,710 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2021-01-06 11:05:10,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2021-01-06 11:05:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2021-01-06 11:05:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 11:05:10,711 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:10,711 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:10,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:10,927 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:10,928 INFO L82 PathProgramCache]: Analyzing trace with hash -547200706, now seen corresponding path program 24 times [2021-01-06 11:05:10,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:10,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193718973] [2021-01-06 11:05:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:13,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193718973] [2021-01-06 11:05:13,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049227494] [2021-01-06 11:05:13,056 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 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 11:05:13,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-01-06 11:05:13,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:13,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 83 conjunts are in the unsatisfiable core [2021-01-06 11:05:13,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:13,730 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:05:13,731 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:13,743 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:13,745 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:13,745 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-01-06 11:05:13,896 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:13,896 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2021-01-06 11:05:13,898 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:13,900 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:13,938 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2021-01-06 11:05:13,939 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:05:13,940 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2021-01-06 11:05:15,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:15,427 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:15,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:15,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 61 [2021-01-06 11:05:15,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623135840] [2021-01-06 11:05:15,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 11:05:15,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:15,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 11:05:15,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3495, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 11:05:15,550 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 61 states. [2021-01-06 11:05:21,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:21,075 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2021-01-06 11:05:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 11:05:21,076 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 101 [2021-01-06 11:05:21,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:21,077 INFO L225 Difference]: With dead ends: 116 [2021-01-06 11:05:21,077 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 11:05:21,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2002 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=435, Invalid=7937, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 11:05:21,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 11:05:21,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-01-06 11:05:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 11:05:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2021-01-06 11:05:21,099 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 101 [2021-01-06 11:05:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:21,099 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2021-01-06 11:05:21,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 11:05:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2021-01-06 11:05:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 11:05:21,100 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:21,100 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:21,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-06 11:05:21,301 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:21,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:21,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1047177484, now seen corresponding path program 25 times [2021-01-06 11:05:21,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:21,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426875095] [2021-01-06 11:05:21,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 264 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:24,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426875095] [2021-01-06 11:05:24,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35108361] [2021-01-06 11:05:24,456 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 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 11:05:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 86 conjunts are in the unsatisfiable core [2021-01-06 11:05:24,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:27,590 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:05:27,591 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:27,599 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:27,600 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:27,600 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2021-01-06 11:05:30,176 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:30,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:30,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:30,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 92 [2021-01-06 11:05:30,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624116984] [2021-01-06 11:05:30,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-01-06 11:05:30,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:30,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-01-06 11:05:30,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=7993, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 11:05:30,344 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 92 states. [2021-01-06 11:05:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:38,203 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2021-01-06 11:05:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 11:05:38,204 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 105 [2021-01-06 11:05:38,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:38,205 INFO L225 Difference]: With dead ends: 174 [2021-01-06 11:05:38,206 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 11:05:38,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3231 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=817, Invalid=14683, Unknown=0, NotChecked=0, Total=15500 [2021-01-06 11:05:38,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 11:05:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-01-06 11:05:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 11:05:38,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-01-06 11:05:38,233 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 105 [2021-01-06 11:05:38,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:38,234 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-01-06 11:05:38,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2021-01-06 11:05:38,234 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-01-06 11:05:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-01-06 11:05:38,234 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:38,234 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:38,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:38,450 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:38,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1647532242, now seen corresponding path program 26 times [2021-01-06 11:05:38,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:38,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571437894] [2021-01-06 11:05:38,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 0 proven. 730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:41,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571437894] [2021-01-06 11:05:41,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576831654] [2021-01-06 11:05:41,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:05:41,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:05:41,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:41,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 88 conjunts are in the unsatisfiable core [2021-01-06 11:05:41,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:41,362 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:05:41,363 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:41,376 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:41,378 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:41,378 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-01-06 11:05:41,556 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:41,557 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2021-01-06 11:05:41,559 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:41,561 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:41,606 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2021-01-06 11:05:41,609 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:05:41,609 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2021-01-06 11:05:43,483 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:43,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 0 proven. 730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:43,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:43,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 65 [2021-01-06 11:05:43,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567017794] [2021-01-06 11:05:43,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 11:05:43,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:43,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 11:05:43,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3985, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 11:05:43,646 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 65 states. [2021-01-06 11:05:51,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:51,047 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2021-01-06 11:05:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-01-06 11:05:51,049 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 108 [2021-01-06 11:05:51,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:51,050 INFO L225 Difference]: With dead ends: 120 [2021-01-06 11:05:51,050 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 11:05:51,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2290 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=460, Invalid=9046, Unknown=0, NotChecked=0, Total=9506 [2021-01-06 11:05:51,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 11:05:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2021-01-06 11:05:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 11:05:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2021-01-06 11:05:51,079 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2021-01-06 11:05:51,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:51,080 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2021-01-06 11:05:51,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 11:05:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2021-01-06 11:05:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 11:05:51,080 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:51,080 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:51,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:51,295 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:51,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:51,295 INFO L82 PathProgramCache]: Analyzing trace with hash 344663268, now seen corresponding path program 27 times [2021-01-06 11:05:51,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:51,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910080273] [2021-01-06 11:05:51,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 312 proven. 472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:55,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910080273] [2021-01-06 11:05:55,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859335381] [2021-01-06 11:05:55,549 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 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 11:05:56,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-01-06 11:05:56,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:56,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 11:05:56,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:56,325 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-01-06 11:05:56,327 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:56,330 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:56,331 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:56,331 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:3 [2021-01-06 11:05:58,122 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:05:58,131 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:58,142 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:58,143 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:58,144 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-01-06 11:05:58,463 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-01-06 11:05:58,464 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-01-06 11:05:58,466 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:58,477 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:58,479 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:58,479 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-01-06 11:06:24,143 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:06:25,082 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:06:25,083 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:06:25,085 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:06:25,087 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:06:25,088 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 11:06:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 378 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:06:25,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:25,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 39] total 88 [2021-01-06 11:06:25,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931002983] [2021-01-06 11:06:25,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-01-06 11:06:25,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:25,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-01-06 11:06:25,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=917, Invalid=6726, Unknown=13, NotChecked=0, Total=7656 [2021-01-06 11:06:25,331 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 88 states. [2021-01-06 11:06:36,535 WARN L197 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-01-06 11:06:39,069 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 39 DAG size of output: 38