/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:07:25,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:07:25,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:07:25,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:07:25,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:07:25,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:07:25,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:07:25,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:07:25,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:07:25,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:07:25,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:07:25,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-23 00:07:25,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:07:25,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:07:25,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:07:25,949 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 00:07:25,983 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:07:25,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:07:25,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:07:25,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:07:25,987 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:07:25,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:07:25,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:07:25,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:07:25,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:07:25,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:07:25,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:07:25,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:07:25,988 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:07:25,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:07:25,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:07:25,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:07:25,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:07:25,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:07:25,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:07:25,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:07:25,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:07:25,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:07:25,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:07:25,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:07:25,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:07:25,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:07:26,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:07:26,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:07:26,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:07:26,402 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:07:26,403 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:07:26,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2020-12-23 00:07:26,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8517af0c8/e9ad0e3b6b7e4e2680b0c22a7c531ac8/FLAGd6a40de19 [2020-12-23 00:07:27,189 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:07:27,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2020-12-23 00:07:27,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8517af0c8/e9ad0e3b6b7e4e2680b0c22a7c531ac8/FLAGd6a40de19 [2020-12-23 00:07:27,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8517af0c8/e9ad0e3b6b7e4e2680b0c22a7c531ac8 [2020-12-23 00:07:27,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:07:27,577 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:07:27,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:07:27,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:07:27,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:07:27,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:07:27" (1/1) ... [2020-12-23 00:07:27,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32f589c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:27, skipping insertion in model container [2020-12-23 00:07:27,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:07:27" (1/1) ... [2020-12-23 00:07:27,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:07:27,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:07:27,768 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-1.i[860,873] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~aa~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~bb~0,],[IdentifierExpression[~b~0,]]] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~cc~0,],[IdentifierExpression[~c~0,]]] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:07:27,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:07:27,800 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:07:27,812 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-1.i[860,873] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#aa~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#aa~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#bb~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#bb~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~b~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#cc~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#cc~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~c~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:07:27,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:07:27,838 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:07:27,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:27 WrapperNode [2020-12-23 00:07:27,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:07:27,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:07:27,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:07:27,840 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:07:27,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:27" (1/1) ... [2020-12-23 00:07:27,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:27" (1/1) ... [2020-12-23 00:07:27,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:07:27,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:07:27,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:07:27,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:07:27,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:27" (1/1) ... [2020-12-23 00:07:27,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:27" (1/1) ... [2020-12-23 00:07:27,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:27" (1/1) ... [2020-12-23 00:07:27,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:27" (1/1) ... [2020-12-23 00:07:27,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:27" (1/1) ... [2020-12-23 00:07:27,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:27" (1/1) ... [2020-12-23 00:07:27,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:27" (1/1) ... [2020-12-23 00:07:27,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:07:27,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:07:27,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:07:27,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:07:27,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:27" (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 00:07:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:07:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:07:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:07:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:07:28,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:07:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:07:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:07:28,387 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:07:28,387 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 00:07:28,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:07:28 BoogieIcfgContainer [2020-12-23 00:07:28,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:07:28,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:07:28,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:07:28,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:07:28,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:07:27" (1/3) ... [2020-12-23 00:07:28,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b29f119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:07:28, skipping insertion in model container [2020-12-23 00:07:28,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:27" (2/3) ... [2020-12-23 00:07:28,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b29f119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:07:28, skipping insertion in model container [2020-12-23 00:07:28,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:07:28" (3/3) ... [2020-12-23 00:07:28,400 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2020-12-23 00:07:28,409 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:07:28,414 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 00:07:28,438 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 00:07:28,468 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:07:28,468 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:07:28,469 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:07:28,469 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:07:28,469 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:07:28,469 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:07:28,469 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:07:28,469 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:07:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-23 00:07:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:07:28,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:28,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:28,494 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:28,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:28,501 INFO L82 PathProgramCache]: Analyzing trace with hash 232427437, now seen corresponding path program 1 times [2020-12-23 00:07:28,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:28,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392698065] [2020-12-23 00:07:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:28,718 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 00:07:28,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392698065] [2020-12-23 00:07:28,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:28,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:07:28,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872342365] [2020-12-23 00:07:28,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:07:28,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:28,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:07:28,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:07:28,746 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-12-23 00:07:28,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:28,765 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2020-12-23 00:07:28,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:07:28,766 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 00:07:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:28,776 INFO L225 Difference]: With dead ends: 49 [2020-12-23 00:07:28,776 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 00:07:28,781 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 00:07:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 00:07:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 00:07:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:07:28,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-23 00:07:28,829 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2020-12-23 00:07:28,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:28,830 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-23 00:07:28,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:07:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-23 00:07:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:07:28,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:28,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:28,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:07:28,834 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:28,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:28,839 INFO L82 PathProgramCache]: Analyzing trace with hash -950337193, now seen corresponding path program 1 times [2020-12-23 00:07:28,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:28,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288584433] [2020-12-23 00:07:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:28,952 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 00:07:28,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288584433] [2020-12-23 00:07:28,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:28,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:07:28,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311357317] [2020-12-23 00:07:28,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:07:28,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:28,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:07:28,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:07:28,963 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 3 states. [2020-12-23 00:07:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:29,052 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-12-23 00:07:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:07:29,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 00:07:29,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:29,056 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:07:29,056 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:07:29,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:07:29,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:07:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-12-23 00:07:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 00:07:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-12-23 00:07:29,070 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 9 [2020-12-23 00:07:29,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:29,071 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-12-23 00:07:29,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:07:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-12-23 00:07:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:07:29,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:29,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:29,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:07:29,073 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:29,074 INFO L82 PathProgramCache]: Analyzing trace with hash 166796571, now seen corresponding path program 1 times [2020-12-23 00:07:29,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:29,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914986740] [2020-12-23 00:07:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:07:29,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914986740] [2020-12-23 00:07:29,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618338277] [2020-12-23 00:07:29,149 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 00:07:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:29,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:07:29,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:07:29,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:29,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:07:29,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738348897] [2020-12-23 00:07:29,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:07:29,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:29,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:07:29,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:07:29,287 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 5 states. [2020-12-23 00:07:29,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:29,336 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-12-23 00:07:29,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:07:29,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 00:07:29,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:29,338 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:07:29,338 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:07:29,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:07:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:07:29,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-12-23 00:07:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:07:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-23 00:07:29,345 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 15 [2020-12-23 00:07:29,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:29,345 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-23 00:07:29,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:07:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-23 00:07:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:07:29,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:29,346 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:29,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:07:29,552 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1231666793, now seen corresponding path program 2 times [2020-12-23 00:07:29,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:29,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564590544] [2020-12-23 00:07:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 00:07:29,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564590544] [2020-12-23 00:07:29,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:29,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:07:29,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969614439] [2020-12-23 00:07:29,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:07:29,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:29,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:07:29,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:07:29,701 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 4 states. [2020-12-23 00:07:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:29,748 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-12-23 00:07:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:07:29,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-23 00:07:29,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:29,751 INFO L225 Difference]: With dead ends: 72 [2020-12-23 00:07:29,751 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 00:07:29,752 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 00:07:29,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 00:07:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2020-12-23 00:07:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:07:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-12-23 00:07:29,769 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 21 [2020-12-23 00:07:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:29,769 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-12-23 00:07:29,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:07:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2020-12-23 00:07:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:07:29,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:29,772 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:29,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 00:07:29,772 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:29,774 INFO L82 PathProgramCache]: Analyzing trace with hash 48196885, now seen corresponding path program 1 times [2020-12-23 00:07:29,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:29,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204392110] [2020-12-23 00:07:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:07:29,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204392110] [2020-12-23 00:07:29,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571569250] [2020-12-23 00:07:29,875 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 00:07:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:29,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:07:29,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:07:29,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:29,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:07:29,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023041011] [2020-12-23 00:07:29,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:07:29,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:29,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:07:29,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:07:29,972 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 6 states. [2020-12-23 00:07:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:30,028 INFO L93 Difference]: Finished difference Result 98 states and 129 transitions. [2020-12-23 00:07:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:07:30,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-23 00:07:30,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:30,029 INFO L225 Difference]: With dead ends: 98 [2020-12-23 00:07:30,029 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 00:07:30,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:07:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 00:07:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-12-23 00:07:30,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 00:07:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-12-23 00:07:30,039 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 21 [2020-12-23 00:07:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:30,039 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-12-23 00:07:30,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:07:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-12-23 00:07:30,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:07:30,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:30,056 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:30,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:30,271 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:30,273 INFO L82 PathProgramCache]: Analyzing trace with hash -491835875, now seen corresponding path program 2 times [2020-12-23 00:07:30,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:30,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943675672] [2020-12-23 00:07:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:07:30,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943675672] [2020-12-23 00:07:30,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837793253] [2020-12-23 00:07:30,382 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 00:07:30,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:30,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:30,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:07:30,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:07:30,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:30,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:07:30,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742970197] [2020-12-23 00:07:30,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:07:30,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:30,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:07:30,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:07:30,518 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 7 states. [2020-12-23 00:07:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:30,576 INFO L93 Difference]: Finished difference Result 116 states and 153 transitions. [2020-12-23 00:07:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:07:30,577 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-12-23 00:07:30,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:30,578 INFO L225 Difference]: With dead ends: 116 [2020-12-23 00:07:30,579 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 00:07:30,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:07:30,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 00:07:30,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2020-12-23 00:07:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 00:07:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-12-23 00:07:30,592 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 27 [2020-12-23 00:07:30,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:30,592 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-12-23 00:07:30,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:07:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-12-23 00:07:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:07:30,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:30,594 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:30,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:30,813 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:30,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:30,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1359435477, now seen corresponding path program 3 times [2020-12-23 00:07:30,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:30,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610437616] [2020-12-23 00:07:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:07:30,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610437616] [2020-12-23 00:07:30,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074924171] [2020-12-23 00:07:30,881 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 00:07:30,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:07:30,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:30,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:07:30,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:07:31,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:31,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:07:31,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151114856] [2020-12-23 00:07:31,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:07:31,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:31,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:07:31,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:07:31,043 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 8 states. [2020-12-23 00:07:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:31,156 INFO L93 Difference]: Finished difference Result 134 states and 177 transitions. [2020-12-23 00:07:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:07:31,159 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-12-23 00:07:31,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:31,160 INFO L225 Difference]: With dead ends: 134 [2020-12-23 00:07:31,161 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 00:07:31,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:07:31,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 00:07:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2020-12-23 00:07:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 00:07:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2020-12-23 00:07:31,175 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 33 [2020-12-23 00:07:31,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:31,176 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2020-12-23 00:07:31,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:07:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2020-12-23 00:07:31,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 00:07:31,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:31,181 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:31,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:31,383 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:31,384 INFO L82 PathProgramCache]: Analyzing trace with hash 128035293, now seen corresponding path program 4 times [2020-12-23 00:07:31,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:31,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498431877] [2020-12-23 00:07:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:07:31,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498431877] [2020-12-23 00:07:31,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586516696] [2020-12-23 00:07:31,467 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 00:07:31,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:31,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:31,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:07:31,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:07:31,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:31,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:07:31,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137317465] [2020-12-23 00:07:31,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:07:31,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:31,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:07:31,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:07:31,648 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand 9 states. [2020-12-23 00:07:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:31,751 INFO L93 Difference]: Finished difference Result 152 states and 201 transitions. [2020-12-23 00:07:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:07:31,751 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-12-23 00:07:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:31,753 INFO L225 Difference]: With dead ends: 152 [2020-12-23 00:07:31,753 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 00:07:31,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:07:31,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 00:07:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-12-23 00:07:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 00:07:31,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2020-12-23 00:07:31,765 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 39 [2020-12-23 00:07:31,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:31,765 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2020-12-23 00:07:31,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:07:31,765 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2020-12-23 00:07:31,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:07:31,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:31,767 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:31,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:31,981 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:31,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:31,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1662394219, now seen corresponding path program 5 times [2020-12-23 00:07:31,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:31,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742528124] [2020-12-23 00:07:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:07:32,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742528124] [2020-12-23 00:07:32,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795947083] [2020-12-23 00:07:32,101 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 00:07:32,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 00:07:32,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:32,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:07:32,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:07:32,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:32,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:07:32,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861736530] [2020-12-23 00:07:32,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:07:32,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:32,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:07:32,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:07:32,532 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand 10 states. [2020-12-23 00:07:32,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:32,629 INFO L93 Difference]: Finished difference Result 170 states and 225 transitions. [2020-12-23 00:07:32,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:07:32,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-12-23 00:07:32,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:32,632 INFO L225 Difference]: With dead ends: 170 [2020-12-23 00:07:32,632 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 00:07:32,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:07:32,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 00:07:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2020-12-23 00:07:32,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 00:07:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2020-12-23 00:07:32,644 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 45 [2020-12-23 00:07:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:32,644 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2020-12-23 00:07:32,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:07:32,644 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2020-12-23 00:07:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:07:32,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:32,646 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:32,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:32,860 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:32,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:32,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1210402205, now seen corresponding path program 6 times [2020-12-23 00:07:32,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:32,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848204003] [2020-12-23 00:07:32,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:32,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848204003] [2020-12-23 00:07:32,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563141943] [2020-12-23 00:07:32,993 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 00:07:33,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:07:33,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:33,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:07:33,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:33,266 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:33,267 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2020-12-23 00:07:33,271 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:33,280 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:33,281 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:33,281 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2020-12-23 00:07:33,370 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 00:07:33,371 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:33,383 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:33,386 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:33,386 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:27 [2020-12-23 00:07:33,496 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:33,497 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 00:07:33,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:33,508 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:33,537 INFO L625 ElimStorePlain]: treesize reduction 22, result has 62.1 percent of original size [2020-12-23 00:07:33,540 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:33,541 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:22 [2020-12-23 00:07:33,586 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:33,587 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 00:07:33,590 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:33,595 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:33,622 INFO L625 ElimStorePlain]: treesize reduction 16, result has 70.9 percent of original size [2020-12-23 00:07:33,624 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:33,624 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:28 [2020-12-23 00:07:33,665 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:33,698 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:33,711 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 00:07:33,711 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:33,732 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:33,733 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 00:07:33,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:33,740 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:33,795 INFO L625 ElimStorePlain]: treesize reduction 22, result has 73.5 percent of original size [2020-12-23 00:07:33,798 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:07:33,798 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:39 [2020-12-23 00:07:33,830 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:33,834 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:07:33,856 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:33,857 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 49 [2020-12-23 00:07:33,861 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:33,869 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2020-12-23 00:07:33,870 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:33,921 INFO L625 ElimStorePlain]: treesize reduction 24, result has 76.2 percent of original size [2020-12-23 00:07:33,926 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2020-12-23 00:07:33,926 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:85, output treesize:77 [2020-12-23 00:07:34,674 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:37,405 WARN L197 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-23 00:07:37,431 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:39,148 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:39,149 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 104 [2020-12-23 00:07:39,154 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:39,196 INFO L625 ElimStorePlain]: treesize reduction 76, result has 46.5 percent of original size [2020-12-23 00:07:39,202 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 00:07:39,203 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:70, output treesize:66 [2020-12-23 00:07:39,474 INFO L348 Elim1Store]: treesize reduction 17, result has 87.9 percent of original size [2020-12-23 00:07:39,475 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 72 treesize of output 198 [2020-12-23 00:07:39,481 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:39,558 INFO L625 ElimStorePlain]: treesize reduction 160, result has 37.0 percent of original size [2020-12-23 00:07:39,568 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 00:07:39,569 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:90, output treesize:66 [2020-12-23 00:07:41,850 INFO L348 Elim1Store]: treesize reduction 17, result has 87.9 percent of original size [2020-12-23 00:07:41,851 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 72 treesize of output 198 [2020-12-23 00:07:41,856 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:41,930 INFO L625 ElimStorePlain]: treesize reduction 160, result has 37.0 percent of original size [2020-12-23 00:07:41,946 INFO L547 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2020-12-23 00:07:41,947 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:90, output treesize:66 [2020-12-23 00:07:42,216 INFO L348 Elim1Store]: treesize reduction 17, result has 81.9 percent of original size [2020-12-23 00:07:42,217 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 89 [2020-12-23 00:07:42,222 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-23 00:07:42,223 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:42,225 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 3, 1] term [2020-12-23 00:07:42,225 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:07:42,226 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2020-12-23 00:07:42,226 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:42,229 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:07:42,229 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:42,231 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-23 00:07:42,231 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:07:42,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:42,234 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-23 00:07:42,235 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:42,236 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:42,237 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:42,240 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2020-12-23 00:07:42,271 INFO L625 ElimStorePlain]: treesize reduction 58, result has 27.5 percent of original size [2020-12-23 00:07:42,274 INFO L547 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:42,274 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:78, output treesize:7 [2020-12-23 00:07:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 40 proven. 85 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 00:07:42,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:42,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 23] total 31 [2020-12-23 00:07:42,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760697697] [2020-12-23 00:07:42,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:07:42,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:42,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:07:42,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=721, Unknown=5, NotChecked=0, Total=930 [2020-12-23 00:07:42,349 INFO L87 Difference]: Start difference. First operand 106 states and 138 transitions. Second operand 31 states. [2020-12-23 00:07:51,555 WARN L197 SmtUtils]: Spent 5.72 s on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-12-23 00:07:53,558 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2020-12-23 00:07:55,621 WARN L197 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-12-23 00:08:05,148 WARN L197 SmtUtils]: Spent 7.74 s on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-12-23 00:08:13,845 WARN L197 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-23 00:08:21,536 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-12-23 00:08:29,422 WARN L197 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-23 00:08:34,088 WARN L197 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 56 [2020-12-23 00:08:49,782 WARN L197 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-23 00:08:51,369 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-23 00:08:59,045 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-23 00:09:07,877 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-23 00:09:10,081 WARN L197 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-23 00:09:57,504 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2020-12-23 00:10:22,267 WARN L197 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-12-23 00:10:47,130 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-12-23 00:10:47,461 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-12-23 00:11:02,377 WARN L197 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-12-23 00:11:04,987 WARN L197 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-12-23 00:11:19,112 WARN L197 SmtUtils]: Spent 4.56 s on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-12-23 00:11:37,640 WARN L197 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-12-23 00:11:56,117 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-12-23 00:12:07,023 WARN L197 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-12-23 00:12:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:10,410 INFO L93 Difference]: Finished difference Result 330 states and 429 transitions. [2020-12-23 00:12:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 00:12:10,410 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 51 [2020-12-23 00:12:10,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:10,412 INFO L225 Difference]: With dead ends: 330 [2020-12-23 00:12:10,412 INFO L226 Difference]: Without dead ends: 268 [2020-12-23 00:12:10,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 150.0s TimeCoverageRelationStatistics Valid=958, Invalid=4996, Unknown=52, NotChecked=0, Total=6006 [2020-12-23 00:12:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-12-23 00:12:10,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 144. [2020-12-23 00:12:10,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 00:12:10,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 187 transitions. [2020-12-23 00:12:10,448 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 187 transitions. Word has length 51 [2020-12-23 00:12:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:10,448 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 187 transitions. [2020-12-23 00:12:10,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:12:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 187 transitions. [2020-12-23 00:12:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:12:10,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:10,452 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:10,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:12:10,653 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:10,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:10,655 INFO L82 PathProgramCache]: Analyzing trace with hash -109326889, now seen corresponding path program 1 times [2020-12-23 00:12:10,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:10,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145570968] [2020-12-23 00:12:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:12:10,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145570968] [2020-12-23 00:12:10,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001902109] [2020-12-23 00:12:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:12:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:10,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:12:10,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:12:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:12:10,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:12:10,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:12:10,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717349319] [2020-12-23 00:12:10,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:12:10,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:10,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:12:10,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:12:10,971 INFO L87 Difference]: Start difference. First operand 144 states and 187 transitions. Second operand 12 states. [2020-12-23 00:12:11,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:11,086 INFO L93 Difference]: Finished difference Result 249 states and 328 transitions. [2020-12-23 00:12:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:12:11,086 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-12-23 00:12:11,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:11,088 INFO L225 Difference]: With dead ends: 249 [2020-12-23 00:12:11,088 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 00:12:11,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:12:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 00:12:11,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2020-12-23 00:12:11,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 00:12:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 207 transitions. [2020-12-23 00:12:11,103 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 207 transitions. Word has length 57 [2020-12-23 00:12:11,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:11,104 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 207 transitions. [2020-12-23 00:12:11,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:12:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 207 transitions. [2020-12-23 00:12:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:12:11,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:11,106 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:11,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:12:11,321 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:11,322 INFO L82 PathProgramCache]: Analyzing trace with hash 470120091, now seen corresponding path program 2 times [2020-12-23 00:12:11,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:11,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104090574] [2020-12-23 00:12:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:12:11,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104090574] [2020-12-23 00:12:11,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131896503] [2020-12-23 00:12:11,498 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 00:12:11,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:12:11,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:12:11,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:12:11,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:12:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:12:11,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:12:11,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:12:11,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818266666] [2020-12-23 00:12:11,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:12:11,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:11,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:12:11,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:12:11,657 INFO L87 Difference]: Start difference. First operand 159 states and 207 transitions. Second operand 13 states. [2020-12-23 00:12:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:11,782 INFO L93 Difference]: Finished difference Result 270 states and 356 transitions. [2020-12-23 00:12:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:12:11,783 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2020-12-23 00:12:11,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:11,786 INFO L225 Difference]: With dead ends: 270 [2020-12-23 00:12:11,786 INFO L226 Difference]: Without dead ends: 184 [2020-12-23 00:12:11,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:12:11,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-23 00:12:11,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 174. [2020-12-23 00:12:11,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 00:12:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 227 transitions. [2020-12-23 00:12:11,802 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 227 transitions. Word has length 63 [2020-12-23 00:12:11,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:11,803 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 227 transitions. [2020-12-23 00:12:11,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:12:11,803 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 227 transitions. [2020-12-23 00:12:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:12:11,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:11,810 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:12,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:12:12,025 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:12,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:12,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2025811479, now seen corresponding path program 3 times [2020-12-23 00:12:12,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:12,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452160034] [2020-12-23 00:12:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat