/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-tiling/mlceu.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:30:21,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:30:21,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:30:21,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:30:21,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:30:21,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:30:21,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:30:21,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:30:21,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:30:21,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:30:21,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:30:21,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:30:21,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:30:21,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:30:21,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:30:21,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:30:21,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:30:21,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:30:21,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:30:21,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:30:21,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:30:21,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:30:21,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:30:21,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:30:21,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:30:21,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:30:21,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:30:21,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:30:21,845 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:30:21,895 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:30:21,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:30:21,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:30:21,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:30:21,898 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:30:21,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:30:21,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:30:21,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:30:21,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:30:21,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:30:21,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:30:21,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:30:21,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:30:21,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:30:21,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:30:21,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:30:21,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:30:21,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:30:21,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:30:21,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:30:21,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:30:21,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:30:21,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:30:21,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:30:21,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:30:21,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:30:22,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:30:22,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:30:22,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:30:22,337 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:30:22,338 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:30:22,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mlceu.c [2020-12-23 00:30:22,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd5ab1c18/e338c858a5924ca6a58b06bbdad6d8f2/FLAG28055fb86 [2020-12-23 00:30:23,218 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:30:23,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu.c [2020-12-23 00:30:23,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd5ab1c18/e338c858a5924ca6a58b06bbdad6d8f2/FLAG28055fb86 [2020-12-23 00:30:23,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd5ab1c18/e338c858a5924ca6a58b06bbdad6d8f2 [2020-12-23 00:30:23,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:30:23,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:30:23,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:30:23,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:30:23,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:30:23,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:30:23" (1/1) ... [2020-12-23 00:30:23,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30394489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:30:23, skipping insertion in model container [2020-12-23 00:30:23,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:30:23" (1/1) ... [2020-12-23 00:30:23,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:30:23,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:30:23,767 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-tiling/mlceu.c[396,409] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] 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: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:30:23,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:30:23,810 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:30:23,828 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-tiling/mlceu.c[396,409] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] 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: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:30:23,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:30:23,868 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:30:23,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:30:23 WrapperNode [2020-12-23 00:30:23,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:30:23,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:30:23,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:30:23,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:30:23,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:30:23" (1/1) ... [2020-12-23 00:30:23,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:30:23" (1/1) ... [2020-12-23 00:30:23,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:30:23,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:30:23,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:30:23,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:30:23,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:30:23" (1/1) ... [2020-12-23 00:30:23,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:30:23" (1/1) ... [2020-12-23 00:30:23,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:30:23" (1/1) ... [2020-12-23 00:30:23,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:30:23" (1/1) ... [2020-12-23 00:30:23,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:30:23" (1/1) ... [2020-12-23 00:30:23,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:30:23" (1/1) ... [2020-12-23 00:30:23,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:30:23" (1/1) ... [2020-12-23 00:30:23,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:30:23,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:30:23,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:30:23,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:30:23,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:30:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:30:24,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:30:24,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:30:24,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:30:24,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 00:30:24,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:30:24,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:30:24,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:30:24,344 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:30:24,345 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 00:30:24,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:30:24 BoogieIcfgContainer [2020-12-23 00:30:24,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:30:24,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:30:24,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:30:24,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:30:24,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:30:23" (1/3) ... [2020-12-23 00:30:24,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499a1bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:30:24, skipping insertion in model container [2020-12-23 00:30:24,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:30:23" (2/3) ... [2020-12-23 00:30:24,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499a1bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:30:24, skipping insertion in model container [2020-12-23 00:30:24,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:30:24" (3/3) ... [2020-12-23 00:30:24,358 INFO L111 eAbstractionObserver]: Analyzing ICFG mlceu.c [2020-12-23 00:30:24,365 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:30:24,370 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:30:24,390 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:30:24,419 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:30:24,419 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:30:24,419 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:30:24,419 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:30:24,419 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:30:24,420 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:30:24,420 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:30:24,420 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:30:24,434 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 00:30:24,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:30:24,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:24,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:24,440 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1096717866, now seen corresponding path program 1 times [2020-12-23 00:30:24,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:24,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770668067] [2020-12-23 00:30:24,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:24,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770668067] [2020-12-23 00:30:24,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:30:24,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:30:24,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734265907] [2020-12-23 00:30:24,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:30:24,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:24,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:30:24,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:30:24,695 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-23 00:30:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:24,720 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-23 00:30:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:30:24,723 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 00:30:24,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:24,743 INFO L225 Difference]: With dead ends: 34 [2020-12-23 00:30:24,744 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 00:30:24,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:30:24,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 00:30:24,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 00:30:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 00:30:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-23 00:30:24,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2020-12-23 00:30:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:24,808 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-23 00:30:24,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:30:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-23 00:30:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:30:24,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:24,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:24,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:30:24,812 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:24,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:24,816 INFO L82 PathProgramCache]: Analyzing trace with hash 678289496, now seen corresponding path program 1 times [2020-12-23 00:30:24,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:24,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456214066] [2020-12-23 00:30:24,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:24,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456214066] [2020-12-23 00:30:24,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:30:24,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:30:24,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697027372] [2020-12-23 00:30:24,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:30:24,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:24,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:30:24,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:30:24,983 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-12-23 00:30:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:25,075 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-12-23 00:30:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:30:25,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 00:30:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:25,080 INFO L225 Difference]: With dead ends: 34 [2020-12-23 00:30:25,083 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 00:30:25,084 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 [2020-12-23 00:30:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 00:30:25,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2020-12-23 00:30:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 00:30:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 00:30:25,097 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-23 00:30:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:25,098 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 00:30:25,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:30:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 00:30:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:30:25,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:25,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:25,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:30:25,103 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:25,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1190752748, now seen corresponding path program 1 times [2020-12-23 00:30:25,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:25,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676856530] [2020-12-23 00:30:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:25,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676856530] [2020-12-23 00:30:25,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567225836] [2020-12-23 00:30:25,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:25,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:30:25,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:25,498 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 11 treesize of output 7 [2020-12-23 00:30:25,499 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:30:25,503 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:30:25,504 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:30:25,505 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-23 00:30:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:25,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:25,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 00:30:25,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403845111] [2020-12-23 00:30:25,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:30:25,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:25,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:30:25,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:30:25,647 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 10 states. [2020-12-23 00:30:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:25,821 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-12-23 00:30:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:30:25,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-23 00:30:25,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:25,823 INFO L225 Difference]: With dead ends: 25 [2020-12-23 00:30:25,823 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 00:30:25,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:30:25,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 00:30:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2020-12-23 00:30:25,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 00:30:25,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-23 00:30:25,830 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-12-23 00:30:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:25,831 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-23 00:30:25,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:30:25,831 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-23 00:30:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:30:25,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:25,832 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:26,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:30:26,046 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:26,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:26,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1891500962, now seen corresponding path program 1 times [2020-12-23 00:30:26,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:26,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384722104] [2020-12-23 00:30:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:26,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384722104] [2020-12-23 00:30:26,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855452506] [2020-12-23 00:30:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:26,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:30:26,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:26,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:26,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 00:30:26,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818502782] [2020-12-23 00:30:26,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:30:26,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:26,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:30:26,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:30:26,285 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 10 states. [2020-12-23 00:30:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:26,375 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-12-23 00:30:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:30:26,376 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-23 00:30:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:26,377 INFO L225 Difference]: With dead ends: 49 [2020-12-23 00:30:26,377 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:30:26,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:30:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:30:26,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2020-12-23 00:30:26,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 00:30:26,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-23 00:30:26,383 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-12-23 00:30:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:26,383 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-23 00:30:26,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:30:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-23 00:30:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:30:26,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:26,384 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:26,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:26,600 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:26,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2006236274, now seen corresponding path program 2 times [2020-12-23 00:30:26,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:26,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668890936] [2020-12-23 00:30:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:26,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668890936] [2020-12-23 00:30:26,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974491889] [2020-12-23 00:30:26,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:26,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:30:26,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:26,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:30:26,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:26,932 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 [2020-12-23 00:30:26,937 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:30:26,944 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:30:26,948 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:30:26,948 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-12-23 00:30:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:27,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:27,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 16 [2020-12-23 00:30:27,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477625021] [2020-12-23 00:30:27,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:30:27,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:27,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:30:27,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:30:27,079 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 16 states. [2020-12-23 00:30:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:27,692 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-12-23 00:30:27,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:30:27,693 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-23 00:30:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:27,694 INFO L225 Difference]: With dead ends: 52 [2020-12-23 00:30:27,694 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 00:30:27,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:30:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 00:30:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2020-12-23 00:30:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:30:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-12-23 00:30:27,703 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2020-12-23 00:30:27,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:27,703 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-12-23 00:30:27,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:30:27,703 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-12-23 00:30:27,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 00:30:27,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:27,704 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:27,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:27,919 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:27,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:27,920 INFO L82 PathProgramCache]: Analyzing trace with hash 466236484, now seen corresponding path program 3 times [2020-12-23 00:30:27,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:27,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344295723] [2020-12-23 00:30:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:28,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344295723] [2020-12-23 00:30:28,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411863040] [2020-12-23 00:30:28,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:28,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:30:28,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:28,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:30:28,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:28,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:28,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 00:30:28,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455456385] [2020-12-23 00:30:28,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:30:28,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:28,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:30:28,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:30:28,277 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 13 states. [2020-12-23 00:30:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:28,387 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-12-23 00:30:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:30:28,388 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-23 00:30:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:28,388 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:30:28,389 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 00:30:28,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:30:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 00:30:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-12-23 00:30:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:30:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-23 00:30:28,395 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2020-12-23 00:30:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:28,396 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-23 00:30:28,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:30:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-23 00:30:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:30:28,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:28,397 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:28,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:28,611 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:28,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:28,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1524796712, now seen corresponding path program 4 times [2020-12-23 00:30:28,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:28,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628468478] [2020-12-23 00:30:28,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:28,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628468478] [2020-12-23 00:30:28,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128334848] [2020-12-23 00:30:28,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:28,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:30:28,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:28,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:30:28,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:29,037 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 [2020-12-23 00:30:29,038 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:30:29,040 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:30:29,042 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:30:29,043 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-12-23 00:30:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:29,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:29,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2020-12-23 00:30:29,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580333042] [2020-12-23 00:30:29,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:30:29,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:29,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:30:29,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:30:29,180 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 19 states. [2020-12-23 00:30:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:29,503 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-23 00:30:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:30:29,504 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-12-23 00:30:29,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:29,505 INFO L225 Difference]: With dead ends: 39 [2020-12-23 00:30:29,506 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 00:30:29,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:30:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 00:30:29,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-12-23 00:30:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:30:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-23 00:30:29,516 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-12-23 00:30:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:29,517 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-23 00:30:29,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:30:29,517 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-23 00:30:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 00:30:29,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:29,518 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:29,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:30:29,728 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash 702525070, now seen corresponding path program 5 times [2020-12-23 00:30:29,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:29,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055149710] [2020-12-23 00:30:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:29,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055149710] [2020-12-23 00:30:29,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640545399] [2020-12-23 00:30:29,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:29,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 00:30:29,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:29,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:30:29,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:30,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:30,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 00:30:30,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665277275] [2020-12-23 00:30:30,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:30:30,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:30,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:30:30,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:30:30,031 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 16 states. [2020-12-23 00:30:30,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:30,199 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-12-23 00:30:30,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:30:30,200 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-12-23 00:30:30,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:30,201 INFO L225 Difference]: With dead ends: 79 [2020-12-23 00:30:30,201 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 00:30:30,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:30:30,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 00:30:30,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-12-23 00:30:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 00:30:30,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-23 00:30:30,208 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-12-23 00:30:30,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:30,209 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-23 00:30:30,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:30:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-23 00:30:30,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 00:30:30,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:30,210 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:30,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:30,421 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:30,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:30,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1539792518, now seen corresponding path program 6 times [2020-12-23 00:30:30,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:30,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170200618] [2020-12-23 00:30:30,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:30,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170200618] [2020-12-23 00:30:30,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683690716] [2020-12-23 00:30:30,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:30,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:30:30,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:30,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 00:30:30,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:30,949 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 [2020-12-23 00:30:30,949 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:30:30,954 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:30:30,955 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:30:30,955 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-12-23 00:30:31,398 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:30:31,404 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:30:31,407 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:30:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:31,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:31,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2020-12-23 00:30:31,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826516964] [2020-12-23 00:30:31,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:30:31,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:31,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:30:31,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:30:31,445 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 26 states. [2020-12-23 00:30:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:33,383 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-12-23 00:30:33,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:30:33,384 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-12-23 00:30:33,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:33,385 INFO L225 Difference]: With dead ends: 90 [2020-12-23 00:30:33,385 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 00:30:33,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=585, Invalid=2721, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 00:30:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 00:30:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-12-23 00:30:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 00:30:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-12-23 00:30:33,396 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 34 [2020-12-23 00:30:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:33,396 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-12-23 00:30:33,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:30:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-12-23 00:30:33,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:30:33,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:33,398 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:33,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:33,612 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:33,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:33,613 INFO L82 PathProgramCache]: Analyzing trace with hash 122087364, now seen corresponding path program 7 times [2020-12-23 00:30:33,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:33,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922456558] [2020-12-23 00:30:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:33,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922456558] [2020-12-23 00:30:33,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202560355] [2020-12-23 00:30:33,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:33,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:30:33,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:33,969 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 [2020-12-23 00:30:33,970 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:30:33,975 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:30:33,978 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:30:33,978 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2020-12-23 00:30:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:34,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:34,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2020-12-23 00:30:34,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775352567] [2020-12-23 00:30:34,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:30:34,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:34,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:30:34,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:30:34,132 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 19 states. [2020-12-23 00:30:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:34,615 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-12-23 00:30:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:30:34,615 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-12-23 00:30:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:34,616 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:30:34,617 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 00:30:34,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:30:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 00:30:34,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-12-23 00:30:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 00:30:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-12-23 00:30:34,625 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2020-12-23 00:30:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:34,626 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-12-23 00:30:34,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:30:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-12-23 00:30:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:30:34,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:34,627 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:34,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:30:34,841 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:34,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1087582854, now seen corresponding path program 8 times [2020-12-23 00:30:34,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:34,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018197737] [2020-12-23 00:30:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:34,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018197737] [2020-12-23 00:30:34,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338040323] [2020-12-23 00:30:34,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:35,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:30:35,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:35,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:30:35,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:35,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:35,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2020-12-23 00:30:35,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817449187] [2020-12-23 00:30:35,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:30:35,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:35,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:30:35,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:30:35,268 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 22 states. [2020-12-23 00:30:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:35,455 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2020-12-23 00:30:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:30:35,455 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-12-23 00:30:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:35,456 INFO L225 Difference]: With dead ends: 109 [2020-12-23 00:30:35,456 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 00:30:35,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:30:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 00:30:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2020-12-23 00:30:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 00:30:35,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-12-23 00:30:35,466 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2020-12-23 00:30:35,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:35,466 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-12-23 00:30:35,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:30:35,466 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-12-23 00:30:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 00:30:35,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:35,467 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:35,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:35,682 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:35,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:35,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2143538330, now seen corresponding path program 9 times [2020-12-23 00:30:35,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:35,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015465091] [2020-12-23 00:30:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:35,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015465091] [2020-12-23 00:30:35,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097027041] [2020-12-23 00:30:35,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:36,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 00:30:36,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:36,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:30:36,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:36,225 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 [2020-12-23 00:30:36,226 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:30:36,229 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:30:36,231 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:30:36,232 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:30:36,780 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:30:36,783 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:30:36,785 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:30:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:36,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:36,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2020-12-23 00:30:36,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447797370] [2020-12-23 00:30:36,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 00:30:36,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:36,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 00:30:36,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:30:36,829 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 33 states. [2020-12-23 00:30:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:38,952 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2020-12-23 00:30:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 00:30:38,952 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 48 [2020-12-23 00:30:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:38,953 INFO L225 Difference]: With dead ends: 121 [2020-12-23 00:30:38,953 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 00:30:38,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=707, Invalid=4695, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 00:30:38,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 00:30:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2020-12-23 00:30:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 00:30:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-12-23 00:30:38,982 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 48 [2020-12-23 00:30:38,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:38,982 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-12-23 00:30:38,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 00:30:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-12-23 00:30:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:30:38,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:38,984 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:39,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:39,185 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:39,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:39,186 INFO L82 PathProgramCache]: Analyzing trace with hash 969527472, now seen corresponding path program 10 times [2020-12-23 00:30:39,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:39,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185172278] [2020-12-23 00:30:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:39,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185172278] [2020-12-23 00:30:39,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108232347] [2020-12-23 00:30:39,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:39,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:30:39,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:39,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 00:30:39,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:39,614 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 [2020-12-23 00:30:39,615 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:30:39,620 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:30:39,622 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:30:39,622 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2020-12-23 00:30:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:39,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:39,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 26 [2020-12-23 00:30:39,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275545283] [2020-12-23 00:30:39,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:30:39,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:39,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:30:39,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:30:39,900 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 26 states. [2020-12-23 00:30:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:40,682 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-12-23 00:30:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:30:40,683 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2020-12-23 00:30:40,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:40,684 INFO L225 Difference]: With dead ends: 68 [2020-12-23 00:30:40,684 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 00:30:40,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:30:40,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 00:30:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-12-23 00:30:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 00:30:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-12-23 00:30:40,694 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 55 [2020-12-23 00:30:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:40,694 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-12-23 00:30:40,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:30:40,694 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-12-23 00:30:40,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:30:40,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:40,695 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:40,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:30:40,909 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:40,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1292279706, now seen corresponding path program 11 times [2020-12-23 00:30:40,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:40,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140042381] [2020-12-23 00:30:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 73 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:41,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140042381] [2020-12-23 00:30:41,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882163128] [2020-12-23 00:30:41,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:41,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 00:30:41,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:41,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:30:41,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:41,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:41,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2020-12-23 00:30:41,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116059253] [2020-12-23 00:30:41,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:30:41,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:41,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:30:41,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:30:41,537 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 28 states. [2020-12-23 00:30:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:41,790 INFO L93 Difference]: Finished difference Result 139 states and 145 transitions. [2020-12-23 00:30:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:30:41,791 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2020-12-23 00:30:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:41,792 INFO L225 Difference]: With dead ends: 139 [2020-12-23 00:30:41,792 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 00:30:41,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:30:41,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 00:30:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-12-23 00:30:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:30:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-23 00:30:41,801 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2020-12-23 00:30:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:41,802 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-23 00:30:41,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:30:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-23 00:30:41,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 00:30:41,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:41,803 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:42,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:30:42,017 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:42,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:42,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1425668434, now seen corresponding path program 12 times [2020-12-23 00:30:42,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:42,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901446134] [2020-12-23 00:30:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:42,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901446134] [2020-12-23 00:30:42,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039597884] [2020-12-23 00:30:42,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:42,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:30:42,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:42,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:30:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:42,917 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 [2020-12-23 00:30:42,920 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:30:42,924 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:30:42,925 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:30:42,925 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:30:45,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:30:45,903 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:30:45,905 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:30:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 89 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:45,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:45,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2020-12-23 00:30:45,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951288138] [2020-12-23 00:30:45,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 00:30:45,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:45,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 00:30:45,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1513, Unknown=1, NotChecked=0, Total=1722 [2020-12-23 00:30:45,971 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 42 states. [2020-12-23 00:30:49,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:49,723 INFO L93 Difference]: Finished difference Result 151 states and 159 transitions. [2020-12-23 00:30:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 00:30:49,723 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 62 [2020-12-23 00:30:49,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:49,724 INFO L225 Difference]: With dead ends: 151 [2020-12-23 00:30:49,724 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 00:30:49,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2096 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1021, Invalid=7908, Unknown=1, NotChecked=0, Total=8930 [2020-12-23 00:30:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 00:30:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2020-12-23 00:30:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 00:30:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-12-23 00:30:49,737 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 62 [2020-12-23 00:30:49,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:49,738 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-12-23 00:30:49,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 00:30:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-12-23 00:30:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:30:49,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:49,739 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:49,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:30:49,947 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:49,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2030424676, now seen corresponding path program 13 times [2020-12-23 00:30:49,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:49,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268723864] [2020-12-23 00:30:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:50,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268723864] [2020-12-23 00:30:50,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178830023] [2020-12-23 00:30:50,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:50,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 00:30:50,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:50,547 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 [2020-12-23 00:30:50,548 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:30:50,553 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:30:50,555 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:30:50,556 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2020-12-23 00:30:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:50,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:50,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 31 [2020-12-23 00:30:50,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238281290] [2020-12-23 00:30:50,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:30:50,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:30:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:30:50,981 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 31 states. [2020-12-23 00:30:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:52,124 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-12-23 00:30:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:30:52,125 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-12-23 00:30:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:52,126 INFO L225 Difference]: With dead ends: 82 [2020-12-23 00:30:52,126 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 00:30:52,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=217, Invalid=2435, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:30:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 00:30:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2020-12-23 00:30:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 00:30:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-12-23 00:30:52,137 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 69 [2020-12-23 00:30:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:52,137 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-12-23 00:30:52,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:30:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-12-23 00:30:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 00:30:52,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:52,139 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:52,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:52,353 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:52,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:52,353 INFO L82 PathProgramCache]: Analyzing trace with hash 93939538, now seen corresponding path program 14 times [2020-12-23 00:30:52,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:52,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807753241] [2020-12-23 00:30:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 129 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:52,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807753241] [2020-12-23 00:30:52,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150265375] [2020-12-23 00:30:52,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:52,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:30:52,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:52,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 00:30:52,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 162 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:53,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:53,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2020-12-23 00:30:53,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111136822] [2020-12-23 00:30:53,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:30:53,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:53,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:30:53,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:30:53,101 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 34 states. [2020-12-23 00:30:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:53,469 INFO L93 Difference]: Finished difference Result 169 states and 175 transitions. [2020-12-23 00:30:53,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 00:30:53,470 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2020-12-23 00:30:53,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:53,471 INFO L225 Difference]: With dead ends: 169 [2020-12-23 00:30:53,471 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 00:30:53,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:30:53,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 00:30:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2020-12-23 00:30:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 00:30:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-23 00:30:53,481 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2020-12-23 00:30:53,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:53,482 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-23 00:30:53,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:30:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-23 00:30:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 00:30:53,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:53,483 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:53,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:30:53,698 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:53,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1156969278, now seen corresponding path program 15 times [2020-12-23 00:30:53,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:53,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498213937] [2020-12-23 00:30:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:54,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498213937] [2020-12-23 00:30:54,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217518363] [2020-12-23 00:30:54,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:54,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 00:30:54,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:54,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 00:30:54,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:55,206 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 [2020-12-23 00:30:55,207 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:30:55,212 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:30:55,213 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:30:55,213 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-12-23 00:30:56,312 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:30:56,313 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:30:56,315 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:30:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:30:56,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:56,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28] total 51 [2020-12-23 00:30:56,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107230184] [2020-12-23 00:30:56,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 00:30:56,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:56,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 00:30:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2319, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 00:30:56,390 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 51 states. [2020-12-23 00:31:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:02,806 INFO L93 Difference]: Finished difference Result 181 states and 189 transitions. [2020-12-23 00:31:02,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 00:31:02,807 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 76 [2020-12-23 00:31:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:02,808 INFO L225 Difference]: With dead ends: 181 [2020-12-23 00:31:02,808 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 00:31:02,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3334 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1612, Invalid=12908, Unknown=0, NotChecked=0, Total=14520 [2020-12-23 00:31:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 00:31:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2020-12-23 00:31:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:31:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-12-23 00:31:02,820 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 76 [2020-12-23 00:31:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:02,821 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-12-23 00:31:02,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 00:31:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-12-23 00:31:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 00:31:02,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:02,822 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:03,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:31:03,036 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:03,037 INFO L82 PathProgramCache]: Analyzing trace with hash 925630088, now seen corresponding path program 16 times [2020-12-23 00:31:03,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:03,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401208059] [2020-12-23 00:31:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:03,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401208059] [2020-12-23 00:31:03,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650629215] [2020-12-23 00:31:03,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:03,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:31:03,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:31:03,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 00:31:03,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:03,740 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 [2020-12-23 00:31:03,741 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:03,746 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:03,747 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:31:03,748 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2020-12-23 00:31:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:04,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:04,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 38 [2020-12-23 00:31:04,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056084752] [2020-12-23 00:31:04,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 00:31:04,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:04,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 00:31:04,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:31:04,329 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 38 states. [2020-12-23 00:31:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:06,108 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-12-23 00:31:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 00:31:06,108 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2020-12-23 00:31:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:06,109 INFO L225 Difference]: With dead ends: 96 [2020-12-23 00:31:06,109 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 00:31:06,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=278, Invalid=3754, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 00:31:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 00:31:06,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2020-12-23 00:31:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 00:31:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-12-23 00:31:06,120 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 83 [2020-12-23 00:31:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:06,120 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-12-23 00:31:06,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 00:31:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-12-23 00:31:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 00:31:06,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:06,122 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:06,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:06,325 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:06,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:06,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1251941826, now seen corresponding path program 17 times [2020-12-23 00:31:06,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:06,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004076662] [2020-12-23 00:31:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 201 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:06,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004076662] [2020-12-23 00:31:06,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806045407] [2020-12-23 00:31:06,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:06,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 00:31:06,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:31:06,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:31:06,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 242 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:07,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:07,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2020-12-23 00:31:07,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706980758] [2020-12-23 00:31:07,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:31:07,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:07,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:31:07,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:31:07,417 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 40 states. [2020-12-23 00:31:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:07,827 INFO L93 Difference]: Finished difference Result 199 states and 205 transitions. [2020-12-23 00:31:07,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:31:07,828 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 87 [2020-12-23 00:31:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:07,829 INFO L225 Difference]: With dead ends: 199 [2020-12-23 00:31:07,829 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 00:31:07,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:31:07,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 00:31:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2020-12-23 00:31:07,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:31:07,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-12-23 00:31:07,840 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 87 [2020-12-23 00:31:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:07,841 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-12-23 00:31:07,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:31:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-12-23 00:31:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 00:31:07,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:07,842 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:08,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:08,056 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:08,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:08,056 INFO L82 PathProgramCache]: Analyzing trace with hash -592174806, now seen corresponding path program 18 times [2020-12-23 00:31:08,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:08,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792424910] [2020-12-23 00:31:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:08,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792424910] [2020-12-23 00:31:08,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137585884] [2020-12-23 00:31:08,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:09,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:31:09,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:31:09,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 00:31:09,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:09,608 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 [2020-12-23 00:31:09,609 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:09,614 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:09,615 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:31:09,615 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:31:11,054 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:11,056 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:31:11,057 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:31:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 231 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:11,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:11,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 57 [2020-12-23 00:31:11,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560496466] [2020-12-23 00:31:11,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 00:31:11,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:11,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 00:31:11,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2834, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 00:31:11,149 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 57 states. [2020-12-23 00:31:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:17,566 INFO L93 Difference]: Finished difference Result 211 states and 219 transitions. [2020-12-23 00:31:17,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-23 00:31:17,567 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 90 [2020-12-23 00:31:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:17,568 INFO L225 Difference]: With dead ends: 211 [2020-12-23 00:31:17,568 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 00:31:17,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4182 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1724, Invalid=16098, Unknown=0, NotChecked=0, Total=17822 [2020-12-23 00:31:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 00:31:17,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-12-23 00:31:17,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 00:31:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-12-23 00:31:17,579 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 90 [2020-12-23 00:31:17,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:17,580 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-12-23 00:31:17,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 00:31:17,580 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-12-23 00:31:17,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 00:31:17,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:17,580 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:17,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:17,781 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:17,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:17,782 INFO L82 PathProgramCache]: Analyzing trace with hash 280183668, now seen corresponding path program 19 times [2020-12-23 00:31:17,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:17,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731458111] [2020-12-23 00:31:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:18,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731458111] [2020-12-23 00:31:18,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763621809] [2020-12-23 00:31:18,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:18,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 00:31:18,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:19,354 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 [2020-12-23 00:31:19,355 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:19,357 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:19,358 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:31:19,358 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-12-23 00:31:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:20,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:20,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2020-12-23 00:31:20,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485481578] [2020-12-23 00:31:20,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 00:31:20,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 00:31:20,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3087, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 00:31:20,260 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 58 states. [2020-12-23 00:31:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:22,255 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-12-23 00:31:22,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 00:31:22,261 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 97 [2020-12-23 00:31:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:22,262 INFO L225 Difference]: With dead ends: 109 [2020-12-23 00:31:22,262 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 00:31:22,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=374, Invalid=5028, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 00:31:22,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 00:31:22,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2020-12-23 00:31:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 00:31:22,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2020-12-23 00:31:22,276 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 97 [2020-12-23 00:31:22,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:22,277 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2020-12-23 00:31:22,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 00:31:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2020-12-23 00:31:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:31:22,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:22,278 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:22,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:31:22,492 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1050923306, now seen corresponding path program 20 times [2020-12-23 00:31:22,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:22,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747229788] [2020-12-23 00:31:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 289 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:22,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747229788] [2020-12-23 00:31:22,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809571820] [2020-12-23 00:31:22,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:23,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:31:23,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:31:23,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 00:31:23,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 338 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:23,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:23,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2020-12-23 00:31:23,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350789236] [2020-12-23 00:31:23,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 00:31:23,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:23,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 00:31:23,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:31:23,773 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 46 states. [2020-12-23 00:31:24,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:24,366 INFO L93 Difference]: Finished difference Result 229 states and 235 transitions. [2020-12-23 00:31:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:31:24,367 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 101 [2020-12-23 00:31:24,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:24,368 INFO L225 Difference]: With dead ends: 229 [2020-12-23 00:31:24,368 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 00:31:24,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=828, Invalid=2712, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 00:31:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 00:31:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2020-12-23 00:31:24,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 00:31:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-12-23 00:31:24,381 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2020-12-23 00:31:24,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:24,381 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-12-23 00:31:24,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 00:31:24,381 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-12-23 00:31:24,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 00:31:24,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:24,383 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:24,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:31:24,597 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:24,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:24,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1833401578, now seen corresponding path program 21 times [2020-12-23 00:31:24,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:24,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186111882] [2020-12-23 00:31:24,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:25,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186111882] [2020-12-23 00:31:25,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602680472] [2020-12-23 00:31:25,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:26,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-23 00:31:26,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:31:26,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 00:31:26,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:27,261 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 [2020-12-23 00:31:27,262 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:27,269 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:27,271 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:31:27,272 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:31:29,583 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:29,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:31:29,587 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:31:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:29,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:29,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 65 [2020-12-23 00:31:29,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110305853] [2020-12-23 00:31:29,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 00:31:29,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:29,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 00:31:29,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=3705, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 00:31:29,729 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 65 states. [2020-12-23 00:31:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:38,898 INFO L93 Difference]: Finished difference Result 241 states and 249 transitions. [2020-12-23 00:31:38,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-12-23 00:31:38,899 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 104 [2020-12-23 00:31:38,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:38,899 INFO L225 Difference]: With dead ends: 241 [2020-12-23 00:31:38,900 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 00:31:38,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2151, Invalid=21411, Unknown=0, NotChecked=0, Total=23562 [2020-12-23 00:31:38,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 00:31:38,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2020-12-23 00:31:38,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 00:31:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-12-23 00:31:38,915 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 104 [2020-12-23 00:31:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:38,916 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-12-23 00:31:38,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 00:31:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-12-23 00:31:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 00:31:38,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:38,917 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:39,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:39,132 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:39,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash -672924576, now seen corresponding path program 22 times [2020-12-23 00:31:39,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:39,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735994539] [2020-12-23 00:31:39,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:40,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735994539] [2020-12-23 00:31:40,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770595013] [2020-12-23 00:31:40,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:40,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:31:40,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:31:40,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 00:31:40,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:40,418 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 [2020-12-23 00:31:40,419 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:40,425 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:40,427 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:31:40,427 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2020-12-23 00:31:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:41,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:41,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 50 [2020-12-23 00:31:41,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115620730] [2020-12-23 00:31:41,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 00:31:41,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:41,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 00:31:41,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2305, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 00:31:41,595 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 50 states. [2020-12-23 00:31:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:46,347 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-12-23 00:31:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 00:31:46,347 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2020-12-23 00:31:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:46,349 INFO L225 Difference]: With dead ends: 124 [2020-12-23 00:31:46,349 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 00:31:46,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=362, Invalid=6610, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 00:31:46,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 00:31:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2020-12-23 00:31:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 00:31:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2020-12-23 00:31:46,365 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 111 [2020-12-23 00:31:46,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:46,365 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2020-12-23 00:31:46,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 00:31:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2020-12-23 00:31:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 00:31:46,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:46,366 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:46,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:31:46,580 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash 464925718, now seen corresponding path program 23 times [2020-12-23 00:31:46,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:46,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250665331] [2020-12-23 00:31:46,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 393 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:47,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250665331] [2020-12-23 00:31:47,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242528738] [2020-12-23 00:31:47,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:47,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 00:31:47,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:31:47,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 00:31:47,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:48,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:48,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2020-12-23 00:31:48,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043167749] [2020-12-23 00:31:48,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 00:31:48,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:48,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 00:31:48,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=2035, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:31:48,727 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 52 states. [2020-12-23 00:31:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:31:49,527 INFO L93 Difference]: Finished difference Result 259 states and 265 transitions. [2020-12-23 00:31:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:31:49,527 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 115 [2020-12-23 00:31:49,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:31:49,528 INFO L225 Difference]: With dead ends: 259 [2020-12-23 00:31:49,529 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 00:31:49,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1057, Invalid=3499, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 00:31:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 00:31:49,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2020-12-23 00:31:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:31:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-12-23 00:31:49,546 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 115 [2020-12-23 00:31:49,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:31:49,547 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-12-23 00:31:49,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 00:31:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-12-23 00:31:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 00:31:49,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:31:49,548 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:31:49,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:49,759 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:31:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:31:49,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1200036098, now seen corresponding path program 24 times [2020-12-23 00:31:49,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:31:49,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350963] [2020-12-23 00:31:49,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:31:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:31:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:51,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350963] [2020-12-23 00:31:51,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119063638] [2020-12-23 00:31:51,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:31:53,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 00:31:53,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:31:53,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 00:31:53,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:31:54,518 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 [2020-12-23 00:31:54,520 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:31:54,524 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:31:54,526 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:31:54,526 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:31:57,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:31:57,263 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:31:57,264 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:31:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 435 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:31:57,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:31:57,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 73 [2020-12-23 00:31:57,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076159957] [2020-12-23 00:31:57,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 00:31:57,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:31:57,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 00:31:57,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=4692, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 00:31:57,417 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 73 states. [2020-12-23 00:32:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:32:10,978 INFO L93 Difference]: Finished difference Result 271 states and 279 transitions. [2020-12-23 00:32:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-12-23 00:32:10,978 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 118 [2020-12-23 00:32:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:32:10,980 INFO L225 Difference]: With dead ends: 271 [2020-12-23 00:32:10,980 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 00:32:10,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7102 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=2622, Invalid=27480, Unknown=0, NotChecked=0, Total=30102 [2020-12-23 00:32:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 00:32:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 127. [2020-12-23 00:32:10,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 00:32:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-12-23 00:32:10,999 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 118 [2020-12-23 00:32:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:32:10,999 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-12-23 00:32:10,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 00:32:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-12-23 00:32:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-23 00:32:11,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:32:11,000 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:32:11,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:32:11,213 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:32:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:32:11,214 INFO L82 PathProgramCache]: Analyzing trace with hash -820893364, now seen corresponding path program 25 times [2020-12-23 00:32:11,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:32:11,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174531161] [2020-12-23 00:32:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:32:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:32:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:12,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174531161] [2020-12-23 00:32:12,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237461251] [2020-12-23 00:32:12,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:32:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:32:12,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 00:32:12,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:32:12,899 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 [2020-12-23 00:32:12,900 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:12,909 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:12,912 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:32:12,913 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2020-12-23 00:32:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:14,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:32:14,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 55 [2020-12-23 00:32:14,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327341521] [2020-12-23 00:32:14,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 00:32:14,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:32:14,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 00:32:14,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 00:32:14,487 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 55 states. [2020-12-23 00:32:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:32:21,131 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-12-23 00:32:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 00:32:21,132 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 125 [2020-12-23 00:32:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:32:21,134 INFO L225 Difference]: With dead ends: 138 [2020-12-23 00:32:21,134 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 00:32:21,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=385, Invalid=7987, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 00:32:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 00:32:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2020-12-23 00:32:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 00:32:21,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2020-12-23 00:32:21,149 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 125 [2020-12-23 00:32:21,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:32:21,150 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2020-12-23 00:32:21,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 00:32:21,150 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2020-12-23 00:32:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-23 00:32:21,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:32:21,151 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:32:21,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:32:21,362 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:32:21,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:32:21,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1156320002, now seen corresponding path program 26 times [2020-12-23 00:32:21,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:32:21,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840812440] [2020-12-23 00:32:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:32:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:32:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 513 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:22,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840812440] [2020-12-23 00:32:22,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472891256] [2020-12-23 00:32:22,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:32:22,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:32:22,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:32:22,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:32:22,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:32:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 578 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:23,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:32:23,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2020-12-23 00:32:23,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044947980] [2020-12-23 00:32:23,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 00:32:23,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:32:23,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 00:32:23,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=2541, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 00:32:23,868 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 58 states. [2020-12-23 00:32:24,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:32:24,977 INFO L93 Difference]: Finished difference Result 289 states and 295 transitions. [2020-12-23 00:32:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 00:32:24,980 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 129 [2020-12-23 00:32:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:32:24,982 INFO L225 Difference]: With dead ends: 289 [2020-12-23 00:32:24,982 INFO L226 Difference]: Without dead ends: 143 [2020-12-23 00:32:24,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1314, Invalid=4386, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 00:32:24,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-23 00:32:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 134. [2020-12-23 00:32:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 00:32:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-12-23 00:32:25,007 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 129 [2020-12-23 00:32:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:32:25,007 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-12-23 00:32:25,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 00:32:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-12-23 00:32:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-23 00:32:25,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:32:25,009 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:32:25,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:32:25,210 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:32:25,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:32:25,211 INFO L82 PathProgramCache]: Analyzing trace with hash -979115282, now seen corresponding path program 27 times [2020-12-23 00:32:25,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:32:25,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871391613] [2020-12-23 00:32:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:32:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:32:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:27,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871391613] [2020-12-23 00:32:27,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001213963] [2020-12-23 00:32:27,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:32:29,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-12-23 00:32:29,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:32:29,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 00:32:29,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:32:31,011 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 [2020-12-23 00:32:31,012 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:31,020 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:31,021 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:32:31,021 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:32:35,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:32:35,496 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:32:35,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:32:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 561 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:35,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:32:35,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 81 [2020-12-23 00:32:35,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802568170] [2020-12-23 00:32:35,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 00:32:35,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:32:35,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 00:32:35,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=685, Invalid=5795, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 00:32:35,677 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 81 states. [2020-12-23 00:32:54,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:32:54,750 INFO L93 Difference]: Finished difference Result 301 states and 309 transitions. [2020-12-23 00:32:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-23 00:32:54,751 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 132 [2020-12-23 00:32:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:32:54,753 INFO L225 Difference]: With dead ends: 301 [2020-12-23 00:32:54,753 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 00:32:54,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8850 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=3137, Invalid=34305, Unknown=0, NotChecked=0, Total=37442 [2020-12-23 00:32:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 00:32:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2020-12-23 00:32:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 00:32:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-12-23 00:32:54,773 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 132 [2020-12-23 00:32:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:32:54,773 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-12-23 00:32:54,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 00:32:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-12-23 00:32:54,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-23 00:32:54,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:32:54,774 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:32:54,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:32:54,975 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:32:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:32:54,976 INFO L82 PathProgramCache]: Analyzing trace with hash 915524152, now seen corresponding path program 28 times [2020-12-23 00:32:54,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:32:54,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282290036] [2020-12-23 00:32:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:32:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:32:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:32:57,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282290036] [2020-12-23 00:32:57,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646551796] [2020-12-23 00:32:57,382 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 [2020-12-23 00:32:57,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:32:57,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:32:57,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-23 00:32:57,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:32:57,598 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 [2020-12-23 00:32:57,600 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:32:57,608 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:32:57,610 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:32:57,610 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2020-12-23 00:33:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:33:00,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:33:00,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 62 [2020-12-23 00:33:00,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136010657] [2020-12-23 00:33:00,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 00:33:00,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:33:00,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 00:33:00,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3601, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 00:33:00,899 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 62 states. [2020-12-23 00:33:09,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:33:09,534 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-12-23 00:33:09,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-23 00:33:09,535 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 139 [2020-12-23 00:33:09,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:33:09,537 INFO L225 Difference]: With dead ends: 152 [2020-12-23 00:33:09,538 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 00:33:09,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=446, Invalid=10266, Unknown=0, NotChecked=0, Total=10712 [2020-12-23 00:33:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 00:33:09,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2020-12-23 00:33:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 00:33:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2020-12-23 00:33:09,554 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 139 [2020-12-23 00:33:09,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:33:09,554 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2020-12-23 00:33:09,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 00:33:09,554 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2020-12-23 00:33:09,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-23 00:33:09,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:33:09,555 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:33:09,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 00:33:09,758 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:33:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:33:09,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1332128274, now seen corresponding path program 29 times [2020-12-23 00:33:09,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:33:09,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056397008] [2020-12-23 00:33:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:33:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:33:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 649 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:33:12,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056397008] [2020-12-23 00:33:12,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899398376] [2020-12-23 00:33:12,302 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 [2020-12-23 00:33:14,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-12-23 00:33:14,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:33:14,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 00:33:14,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:33:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 722 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:33:16,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:33:16,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2020-12-23 00:33:16,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585672879] [2020-12-23 00:33:16,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 00:33:16,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:33:16,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 00:33:16,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=3103, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 00:33:16,956 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 64 states. [2020-12-23 00:33:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:33:18,657 INFO L93 Difference]: Finished difference Result 319 states and 325 transitions. [2020-12-23 00:33:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 00:33:18,660 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 143 [2020-12-23 00:33:18,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:33:18,661 INFO L225 Difference]: With dead ends: 319 [2020-12-23 00:33:18,661 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 00:33:18,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1599, Invalid=5373, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 00:33:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 00:33:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 148. [2020-12-23 00:33:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-23 00:33:18,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2020-12-23 00:33:18,684 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2020-12-23 00:33:18,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:33:18,684 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2020-12-23 00:33:18,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 00:33:18,684 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2020-12-23 00:33:18,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 00:33:18,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:33:18,686 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:33:18,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:33:18,892 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:33:18,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:33:18,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1100144858, now seen corresponding path program 30 times [2020-12-23 00:33:18,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:33:18,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402997216] [2020-12-23 00:33:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:33:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:33:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:33:22,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402997216] [2020-12-23 00:33:22,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009703202] [2020-12-23 00:33:22,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:33:29,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-23 00:33:29,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:33:29,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 00:33:29,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:33:31,662 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 [2020-12-23 00:33:31,663 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:33:31,670 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:33:31,671 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:33:31,671 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:33:36,984 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:33:36,985 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:33:36,986 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:33:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 703 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:33:37,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:33:37,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 89 [2020-12-23 00:33:37,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620336462] [2020-12-23 00:33:37,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-12-23 00:33:37,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:33:37,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-12-23 00:33:37,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=7014, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 00:33:37,191 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 89 states. [2020-12-23 00:34:00,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:00,471 INFO L93 Difference]: Finished difference Result 331 states and 339 transitions. [2020-12-23 00:34:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-12-23 00:34:00,472 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 146 [2020-12-23 00:34:00,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:00,473 INFO L225 Difference]: With dead ends: 331 [2020-12-23 00:34:00,473 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 00:34:00,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10790 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=3696, Invalid=41886, Unknown=0, NotChecked=0, Total=45582 [2020-12-23 00:34:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 00:34:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2020-12-23 00:34:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 00:34:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2020-12-23 00:34:00,499 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 146 [2020-12-23 00:34:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:00,499 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2020-12-23 00:34:00,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-12-23 00:34:00,500 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2020-12-23 00:34:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-23 00:34:00,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:00,501 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:00,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:34:00,715 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:00,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:00,716 INFO L82 PathProgramCache]: Analyzing trace with hash -860430556, now seen corresponding path program 31 times [2020-12-23 00:34:00,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:00,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467888994] [2020-12-23 00:34:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:05,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467888994] [2020-12-23 00:34:05,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404939565] [2020-12-23 00:34:05,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:05,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-23 00:34:05,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:05,793 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 [2020-12-23 00:34:05,796 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:05,818 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:05,820 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:34:05,821 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2020-12-23 00:34:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:10,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:10,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 67 [2020-12-23 00:34:10,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662867713] [2020-12-23 00:34:10,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 00:34:10,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:10,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 00:34:10,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 00:34:10,857 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 67 states.