/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/sorting_bubblesort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:37:54,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:37:54,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:37:54,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:37:54,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:37:54,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:37:54,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:37:54,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:37:54,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:37:54,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:37:54,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:37:54,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:37:54,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:37:54,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:37:54,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:37:54,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:37:54,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:37:54,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:37:54,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:37:54,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:37:54,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:37:54,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:37:54,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:37:54,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:37:54,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:37:54,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:37:54,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:37:54,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:37:54,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:37:54,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:37:54,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:37:54,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:37:54,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:37:54,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:37:54,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:37:54,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:37:54,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:37:54,829 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:37:54,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:37:54,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:37:54,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:37:54,834 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:37:54,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:37:54,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:37:54,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:37:54,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:37:54,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:37:54,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:37:54,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:37:54,837 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:37:54,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:37:54,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:37:54,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:37:54,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:37:54,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:37:54,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:37:54,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:37:54,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:37:54,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:37:54,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:37:54,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:37:54,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:37:54,839 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:37:55,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:37:55,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:37:55,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:37:55,323 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:37:55,323 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:37:55,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2021-01-06 09:37:55,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2d5fc0ebb/f7d665c3d2e34e949c0245cae3524352/FLAGb51a57830 [2021-01-06 09:37:55,900 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:37:55,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2021-01-06 09:37:55,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2d5fc0ebb/f7d665c3d2e34e949c0245cae3524352/FLAGb51a57830 [2021-01-06 09:37:56,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2d5fc0ebb/f7d665c3d2e34e949c0245cae3524352 [2021-01-06 09:37:56,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:37:56,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:37:56,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:37:56,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:37:56,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:37:56,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5616607b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56, skipping insertion in model container [2021-01-06 09:37:56,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:37:56,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:37:56,503 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/sorting_bubblesort_ground-2.i[820,833] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[BinaryExpression[ARITHMINUS,IdentifierExpression[~i~0,],IntegerLiteral[1]]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 09:37:56,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:37:56,545 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:37:56,567 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/sorting_bubblesort_ground-2.i[820,833] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,IdentifierExpression[~i~0,],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 09:37:56,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:37:56,622 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:37:56,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56 WrapperNode [2021-01-06 09:37:56,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:37:56,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:37:56,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:37:56,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:37:56,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:37:56,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:37:56,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:37:56,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:37:56,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... [2021-01-06 09:37:56,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:37:56,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:37:56,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:37:56,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:37:56,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:37:56,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:37:56,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:37:56,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:37:56,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:37:56,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:37:56,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:37:56,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:37:57,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:37:57,122 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 09:37:57,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:37:57 BoogieIcfgContainer [2021-01-06 09:37:57,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:37:57,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:37:57,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:37:57,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:37:57,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:37:56" (1/3) ... [2021-01-06 09:37:57,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6cf2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:37:57, skipping insertion in model container [2021-01-06 09:37:57,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:37:56" (2/3) ... [2021-01-06 09:37:57,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6cf2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:37:57, skipping insertion in model container [2021-01-06 09:37:57,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:37:57" (3/3) ... [2021-01-06 09:37:57,135 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2021-01-06 09:37:57,142 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:37:57,147 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:37:57,174 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:37:57,210 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:37:57,210 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:37:57,211 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:37:57,211 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:37:57,211 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:37:57,212 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:37:57,212 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:37:57,212 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:37:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2021-01-06 09:37:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 09:37:57,239 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:57,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:57,240 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:57,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2021-01-06 09:37:57,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:57,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706507896] [2021-01-06 09:37:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:37:57,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706507896] [2021-01-06 09:37:57,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:37:57,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:37:57,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977877100] [2021-01-06 09:37:57,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:37:57,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:57,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:37:57,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:37:57,550 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2021-01-06 09:37:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:57,612 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2021-01-06 09:37:57,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:37:57,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 09:37:57,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:57,625 INFO L225 Difference]: With dead ends: 42 [2021-01-06 09:37:57,626 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 09:37:57,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:37:57,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 09:37:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-01-06 09:37:57,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 09:37:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-01-06 09:37:57,673 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-01-06 09:37:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:57,673 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-01-06 09:37:57,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:37:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-01-06 09:37:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 09:37:57,675 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:57,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:57,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:37:57,675 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:57,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:57,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2021-01-06 09:37:57,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:57,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265071209] [2021-01-06 09:37:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:37:57,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265071209] [2021-01-06 09:37:57,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999169926] [2021-01-06 09:37:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:57,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:37:57,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:37:57,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:37:57,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:37:57,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157677496] [2021-01-06 09:37:57,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:37:57,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:57,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:37:57,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:57,852 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2021-01-06 09:37:57,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:57,865 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-01-06 09:37:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:37:57,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-01-06 09:37:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:57,867 INFO L225 Difference]: With dead ends: 32 [2021-01-06 09:37:57,867 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 09:37:57,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 09:37:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 09:37:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 09:37:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-01-06 09:37:57,874 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2021-01-06 09:37:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:57,874 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-01-06 09:37:57,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:37:57,875 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-01-06 09:37:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 09:37:57,875 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:57,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:58,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:37:58,092 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:58,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:58,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2021-01-06 09:37:58,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:58,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138094298] [2021-01-06 09:37:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:37:58,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138094298] [2021-01-06 09:37:58,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831389229] [2021-01-06 09:37:58,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:37:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:37:58,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:37:58,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:37:58,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029770372] [2021-01-06 09:37:58,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:37:58,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:58,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:37:58,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:58,240 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 3 states. [2021-01-06 09:37:58,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:58,259 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-01-06 09:37:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:37:58,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2021-01-06 09:37:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:58,261 INFO L225 Difference]: With dead ends: 44 [2021-01-06 09:37:58,261 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 09:37:58,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:58,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 09:37:58,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-01-06 09:37:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:37:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-01-06 09:37:58,267 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2021-01-06 09:37:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:58,268 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-01-06 09:37:58,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:37:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-01-06 09:37:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 09:37:58,269 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:58,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:58,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:58,483 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:58,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:58,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2021-01-06 09:37:58,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:58,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051823660] [2021-01-06 09:37:58,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:37:58,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051823660] [2021-01-06 09:37:58,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376455017] [2021-01-06 09:37:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:58,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:37:58,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:37:58,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:37:58,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:37:58,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541457023] [2021-01-06 09:37:58,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:37:58,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:58,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:37:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:58,702 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2021-01-06 09:37:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:58,725 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-01-06 09:37:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:37:58,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-01-06 09:37:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:58,727 INFO L225 Difference]: With dead ends: 46 [2021-01-06 09:37:58,727 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 09:37:58,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:37:58,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 09:37:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-01-06 09:37:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 09:37:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-01-06 09:37:58,732 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2021-01-06 09:37:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:58,733 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-01-06 09:37:58,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:37:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-01-06 09:37:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 09:37:58,734 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:58,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:58,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:58,949 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:58,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:58,951 INFO L82 PathProgramCache]: Analyzing trace with hash 784472297, now seen corresponding path program 2 times [2021-01-06 09:37:58,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:58,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102083820] [2021-01-06 09:37:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:37:59,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102083820] [2021-01-06 09:37:59,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096303759] [2021-01-06 09:37:59,032 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:59,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:37:59,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:37:59,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:37:59,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:37:59,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:37:59,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 09:37:59,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555117423] [2021-01-06 09:37:59,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:37:59,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:59,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:37:59,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:37:59,235 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2021-01-06 09:37:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:59,300 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2021-01-06 09:37:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:37:59,301 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2021-01-06 09:37:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:59,302 INFO L225 Difference]: With dead ends: 57 [2021-01-06 09:37:59,302 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 09:37:59,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:37:59,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 09:37:59,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2021-01-06 09:37:59,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 09:37:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-01-06 09:37:59,308 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 19 [2021-01-06 09:37:59,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:59,309 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-01-06 09:37:59,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:37:59,309 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-01-06 09:37:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 09:37:59,310 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:59,310 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:37:59,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:59,525 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:37:59,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:37:59,526 INFO L82 PathProgramCache]: Analyzing trace with hash -201702437, now seen corresponding path program 3 times [2021-01-06 09:37:59,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:37:59,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668093120] [2021-01-06 09:37:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:37:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:37:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:37:59,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668093120] [2021-01-06 09:37:59,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119449165] [2021-01-06 09:37:59,604 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:37:59,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 09:37:59,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:37:59,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:37:59,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:37:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:37:59,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:37:59,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-01-06 09:37:59,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194535214] [2021-01-06 09:37:59,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:37:59,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:37:59,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:37:59,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:37:59,745 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 9 states. [2021-01-06 09:37:59,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:37:59,814 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-01-06 09:37:59,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:37:59,815 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2021-01-06 09:37:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:37:59,816 INFO L225 Difference]: With dead ends: 70 [2021-01-06 09:37:59,816 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 09:37:59,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:37:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 09:37:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-01-06 09:37:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 09:37:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-01-06 09:37:59,823 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 24 [2021-01-06 09:37:59,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:37:59,824 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-01-06 09:37:59,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:37:59,824 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-01-06 09:37:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 09:37:59,825 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:37:59,825 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:00,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:38:00,040 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:00,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:00,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1255714277, now seen corresponding path program 4 times [2021-01-06 09:38:00,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:00,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600438973] [2021-01-06 09:38:00,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 09:38:00,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600438973] [2021-01-06 09:38:00,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776107958] [2021-01-06 09:38:00,140 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:00,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:00,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:00,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:38:00,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 09:38:00,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:00,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:38:00,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422996791] [2021-01-06 09:38:00,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:38:00,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:00,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:38:00,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:38:00,276 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 8 states. [2021-01-06 09:38:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:00,308 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2021-01-06 09:38:00,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:38:00,308 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2021-01-06 09:38:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:00,309 INFO L225 Difference]: With dead ends: 74 [2021-01-06 09:38:00,309 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 09:38:00,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:38:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 09:38:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-01-06 09:38:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 09:38:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2021-01-06 09:38:00,316 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 29 [2021-01-06 09:38:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:00,317 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2021-01-06 09:38:00,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:38:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2021-01-06 09:38:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 09:38:00,318 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:00,318 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:00,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:00,532 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:00,534 INFO L82 PathProgramCache]: Analyzing trace with hash -654389213, now seen corresponding path program 5 times [2021-01-06 09:38:00,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:00,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667211521] [2021-01-06 09:38:00,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 09:38:00,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667211521] [2021-01-06 09:38:00,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170897472] [2021-01-06 09:38:00,655 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:00,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 09:38:00,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:00,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:38:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 09:38:00,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:00,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-01-06 09:38:00,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679399886] [2021-01-06 09:38:00,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:38:00,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:00,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:38:00,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:38:00,794 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 12 states. [2021-01-06 09:38:00,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:00,866 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2021-01-06 09:38:00,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:38:00,867 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2021-01-06 09:38:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:00,868 INFO L225 Difference]: With dead ends: 86 [2021-01-06 09:38:00,868 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 09:38:00,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:38:00,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 09:38:00,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2021-01-06 09:38:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 09:38:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-01-06 09:38:00,875 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 31 [2021-01-06 09:38:00,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:00,875 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-01-06 09:38:00,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:38:00,876 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-01-06 09:38:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 09:38:00,877 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:00,877 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:01,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:01,091 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:01,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:01,093 INFO L82 PathProgramCache]: Analyzing trace with hash -568371359, now seen corresponding path program 6 times [2021-01-06 09:38:01,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:01,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022227137] [2021-01-06 09:38:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 09:38:01,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022227137] [2021-01-06 09:38:01,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651483349] [2021-01-06 09:38:01,178 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:01,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:38:01,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:01,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:38:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:38:01,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:01,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-01-06 09:38:01,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152404305] [2021-01-06 09:38:01,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:38:01,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:01,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:38:01,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:38:01,361 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 14 states. [2021-01-06 09:38:01,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:01,431 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2021-01-06 09:38:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:38:01,432 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2021-01-06 09:38:01,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:01,433 INFO L225 Difference]: With dead ends: 100 [2021-01-06 09:38:01,433 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 09:38:01,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:38:01,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 09:38:01,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-01-06 09:38:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 09:38:01,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-01-06 09:38:01,440 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 36 [2021-01-06 09:38:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:01,440 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-01-06 09:38:01,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:38:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-01-06 09:38:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:38:01,442 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:01,442 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:01,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:38:01,656 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1072367713, now seen corresponding path program 7 times [2021-01-06 09:38:01,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:01,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628064080] [2021-01-06 09:38:01,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:38:01,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628064080] [2021-01-06 09:38:01,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71823570] [2021-01-06 09:38:01,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:01,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:38:01,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:38:01,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:01,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:38:01,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322582559] [2021-01-06 09:38:01,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:38:01,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:01,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:38:01,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:38:01,915 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 11 states. [2021-01-06 09:38:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:01,954 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2021-01-06 09:38:01,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:38:01,955 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2021-01-06 09:38:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:01,956 INFO L225 Difference]: With dead ends: 104 [2021-01-06 09:38:01,956 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 09:38:01,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:38:01,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 09:38:01,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-01-06 09:38:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 09:38:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2021-01-06 09:38:01,963 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 41 [2021-01-06 09:38:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:01,963 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2021-01-06 09:38:01,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:38:01,963 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2021-01-06 09:38:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 09:38:01,964 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:01,964 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:02,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:02,178 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:02,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1876143325, now seen corresponding path program 8 times [2021-01-06 09:38:02,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:02,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704528771] [2021-01-06 09:38:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:38:02,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704528771] [2021-01-06 09:38:02,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513274939] [2021-01-06 09:38:02,305 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:02,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:02,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:02,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:38:02,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:38:02,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:02,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:38:02,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988094069] [2021-01-06 09:38:02,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:38:02,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:02,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:38:02,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:38:02,438 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 12 states. [2021-01-06 09:38:02,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:02,477 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2021-01-06 09:38:02,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:38:02,479 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2021-01-06 09:38:02,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:02,480 INFO L225 Difference]: With dead ends: 106 [2021-01-06 09:38:02,480 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 09:38:02,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:38:02,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 09:38:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-01-06 09:38:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 09:38:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-01-06 09:38:02,493 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 43 [2021-01-06 09:38:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:02,493 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-01-06 09:38:02,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:38:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-01-06 09:38:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 09:38:02,494 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:02,495 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:02,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:02,711 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:02,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:02,712 INFO L82 PathProgramCache]: Analyzing trace with hash 716835483, now seen corresponding path program 9 times [2021-01-06 09:38:02,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:02,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770311132] [2021-01-06 09:38:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:38:02,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770311132] [2021-01-06 09:38:02,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975770022] [2021-01-06 09:38:02,847 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:02,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 09:38:02,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:02,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:38:02,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:38:03,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:03,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-01-06 09:38:03,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083489067] [2021-01-06 09:38:03,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:38:03,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:03,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:38:03,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:03,086 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 18 states. [2021-01-06 09:38:03,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:03,183 INFO L93 Difference]: Finished difference Result 118 states and 152 transitions. [2021-01-06 09:38:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:38:03,183 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2021-01-06 09:38:03,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:03,184 INFO L225 Difference]: With dead ends: 118 [2021-01-06 09:38:03,184 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 09:38:03,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:03,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 09:38:03,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2021-01-06 09:38:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 09:38:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2021-01-06 09:38:03,191 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 45 [2021-01-06 09:38:03,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:03,192 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2021-01-06 09:38:03,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:38:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2021-01-06 09:38:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 09:38:03,193 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:03,193 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:03,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:38:03,408 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:03,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1555127913, now seen corresponding path program 10 times [2021-01-06 09:38:03,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:03,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193754324] [2021-01-06 09:38:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 09:38:03,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193754324] [2021-01-06 09:38:03,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754593196] [2021-01-06 09:38:03,540 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:03,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:03,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:03,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:38:03,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 09:38:03,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:03,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:38:03,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065126677] [2021-01-06 09:38:03,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:38:03,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:03,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:38:03,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:38:03,679 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 14 states. [2021-01-06 09:38:03,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:03,732 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2021-01-06 09:38:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:38:03,733 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2021-01-06 09:38:03,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:03,733 INFO L225 Difference]: With dead ends: 122 [2021-01-06 09:38:03,733 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 09:38:03,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:38:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 09:38:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-01-06 09:38:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 09:38:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2021-01-06 09:38:03,740 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 50 [2021-01-06 09:38:03,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:03,740 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2021-01-06 09:38:03,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:38:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2021-01-06 09:38:03,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 09:38:03,741 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:03,741 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:03,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:38:03,955 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:03,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1720209685, now seen corresponding path program 11 times [2021-01-06 09:38:03,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:03,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309307244] [2021-01-06 09:38:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 09:38:04,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309307244] [2021-01-06 09:38:04,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545865706] [2021-01-06 09:38:04,102 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:04,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 09:38:04,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:04,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:38:04,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 09:38:04,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:04,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-01-06 09:38:04,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41005797] [2021-01-06 09:38:04,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:38:04,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:04,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:38:04,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:38:04,410 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 21 states. [2021-01-06 09:38:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:04,518 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2021-01-06 09:38:04,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 09:38:04,519 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2021-01-06 09:38:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:04,519 INFO L225 Difference]: With dead ends: 134 [2021-01-06 09:38:04,520 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 09:38:04,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:38:04,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 09:38:04,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2021-01-06 09:38:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 09:38:04,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2021-01-06 09:38:04,526 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 52 [2021-01-06 09:38:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:04,527 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2021-01-06 09:38:04,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:38:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2021-01-06 09:38:04,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 09:38:04,528 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:04,528 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:04,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:38:04,742 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:04,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:04,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2017640405, now seen corresponding path program 12 times [2021-01-06 09:38:04,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:04,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489211824] [2021-01-06 09:38:04,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:04,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489211824] [2021-01-06 09:38:04,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915166885] [2021-01-06 09:38:04,933 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:05,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 09:38:05,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:05,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:38:05,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:05,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:05,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:38:05,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435612802] [2021-01-06 09:38:05,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:38:05,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:05,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:38:05,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:38:05,224 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand 16 states. [2021-01-06 09:38:05,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:05,289 INFO L93 Difference]: Finished difference Result 138 states and 174 transitions. [2021-01-06 09:38:05,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:38:05,290 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2021-01-06 09:38:05,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:05,291 INFO L225 Difference]: With dead ends: 138 [2021-01-06 09:38:05,291 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 09:38:05,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:38:05,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 09:38:05,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-01-06 09:38:05,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 09:38:05,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-01-06 09:38:05,297 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 57 [2021-01-06 09:38:05,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:05,298 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-01-06 09:38:05,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:38:05,298 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-01-06 09:38:05,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 09:38:05,299 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:05,299 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:05,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:05,513 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:05,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:05,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1894041325, now seen corresponding path program 13 times [2021-01-06 09:38:05,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:05,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311231564] [2021-01-06 09:38:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:05,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311231564] [2021-01-06 09:38:05,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172581930] [2021-01-06 09:38:05,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:05,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:38:05,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:05,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:05,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:38:05,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495014935] [2021-01-06 09:38:05,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:38:05,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:05,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:38:05,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:38:05,857 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 17 states. [2021-01-06 09:38:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:05,924 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2021-01-06 09:38:05,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:38:05,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2021-01-06 09:38:05,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:05,925 INFO L225 Difference]: With dead ends: 140 [2021-01-06 09:38:05,926 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 09:38:05,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:38:05,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 09:38:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-01-06 09:38:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 09:38:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2021-01-06 09:38:05,931 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 59 [2021-01-06 09:38:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:05,932 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2021-01-06 09:38:05,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:38:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2021-01-06 09:38:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:38:05,933 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:05,933 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:06,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:38:06,147 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:06,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:06,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1371167441, now seen corresponding path program 14 times [2021-01-06 09:38:06,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:06,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093575505] [2021-01-06 09:38:06,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:06,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093575505] [2021-01-06 09:38:06,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818958985] [2021-01-06 09:38:06,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:06,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:06,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:06,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:38:06,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:06,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:06,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:38:06,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951132314] [2021-01-06 09:38:06,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:38:06,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:06,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:38:06,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:06,562 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 18 states. [2021-01-06 09:38:06,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:06,622 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2021-01-06 09:38:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:38:06,622 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2021-01-06 09:38:06,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:06,626 INFO L225 Difference]: With dead ends: 142 [2021-01-06 09:38:06,626 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 09:38:06,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:06,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 09:38:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-01-06 09:38:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 09:38:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2021-01-06 09:38:06,634 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 61 [2021-01-06 09:38:06,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:06,636 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2021-01-06 09:38:06,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:38:06,636 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2021-01-06 09:38:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 09:38:06,637 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:06,637 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:06,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:38:06,852 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:06,853 INFO L82 PathProgramCache]: Analyzing trace with hash -384301809, now seen corresponding path program 15 times [2021-01-06 09:38:06,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:06,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845552482] [2021-01-06 09:38:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 09:38:07,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845552482] [2021-01-06 09:38:07,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347242513] [2021-01-06 09:38:07,091 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:07,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 09:38:07,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:07,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:38:07,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 09:38:07,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:07,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2021-01-06 09:38:07,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786012537] [2021-01-06 09:38:07,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 09:38:07,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:07,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 09:38:07,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:38:07,388 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand 26 states. [2021-01-06 09:38:07,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:07,536 INFO L93 Difference]: Finished difference Result 154 states and 196 transitions. [2021-01-06 09:38:07,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 09:38:07,536 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2021-01-06 09:38:07,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:07,537 INFO L225 Difference]: With dead ends: 154 [2021-01-06 09:38:07,537 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 09:38:07,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:38:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 09:38:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-01-06 09:38:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 09:38:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2021-01-06 09:38:07,542 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 63 [2021-01-06 09:38:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:07,543 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2021-01-06 09:38:07,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 09:38:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2021-01-06 09:38:07,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 09:38:07,543 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:07,544 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:07,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 09:38:07,759 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:07,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:07,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2008179445, now seen corresponding path program 16 times [2021-01-06 09:38:07,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:07,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815789290] [2021-01-06 09:38:07,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-01-06 09:38:08,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815789290] [2021-01-06 09:38:08,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155980593] [2021-01-06 09:38:08,003 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:08,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:08,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:08,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:38:08,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-01-06 09:38:08,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:08,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:38:08,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870674724] [2021-01-06 09:38:08,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:38:08,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:08,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:38:08,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:38:08,163 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 20 states. [2021-01-06 09:38:08,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:08,222 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2021-01-06 09:38:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:38:08,222 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2021-01-06 09:38:08,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:08,223 INFO L225 Difference]: With dead ends: 158 [2021-01-06 09:38:08,223 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 09:38:08,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:38:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 09:38:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-01-06 09:38:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 09:38:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2021-01-06 09:38:08,228 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 68 [2021-01-06 09:38:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:08,228 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2021-01-06 09:38:08,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:38:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2021-01-06 09:38:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 09:38:08,229 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:08,229 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:08,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:08,439 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:08,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:08,439 INFO L82 PathProgramCache]: Analyzing trace with hash -32876809, now seen corresponding path program 17 times [2021-01-06 09:38:08,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:08,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439412753] [2021-01-06 09:38:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-01-06 09:38:08,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439412753] [2021-01-06 09:38:08,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575137270] [2021-01-06 09:38:08,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:08,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 09:38:08,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:08,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:38:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 09:38:09,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:09,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2021-01-06 09:38:09,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379578607] [2021-01-06 09:38:09,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:38:09,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:09,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:38:09,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:38:09,142 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 29 states. [2021-01-06 09:38:09,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:09,295 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2021-01-06 09:38:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 09:38:09,296 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2021-01-06 09:38:09,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:09,297 INFO L225 Difference]: With dead ends: 170 [2021-01-06 09:38:09,297 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 09:38:09,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:38:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 09:38:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2021-01-06 09:38:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 09:38:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2021-01-06 09:38:09,302 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 70 [2021-01-06 09:38:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:09,302 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2021-01-06 09:38:09,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:38:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2021-01-06 09:38:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 09:38:09,303 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:09,303 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:09,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:09,516 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:09,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1211963593, now seen corresponding path program 18 times [2021-01-06 09:38:09,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:09,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161928104] [2021-01-06 09:38:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-01-06 09:38:09,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161928104] [2021-01-06 09:38:09,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055566006] [2021-01-06 09:38:09,799 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:10,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 09:38:10,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:10,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:38:10,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 09:38:10,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:10,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2021-01-06 09:38:10,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039703721] [2021-01-06 09:38:10,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 09:38:10,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:10,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 09:38:10,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2021-01-06 09:38:10,519 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 31 states. [2021-01-06 09:38:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:10,674 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2021-01-06 09:38:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 09:38:10,675 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2021-01-06 09:38:10,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:10,676 INFO L225 Difference]: With dead ends: 184 [2021-01-06 09:38:10,676 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 09:38:10,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2021-01-06 09:38:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 09:38:10,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2021-01-06 09:38:10,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 09:38:10,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2021-01-06 09:38:10,682 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 75 [2021-01-06 09:38:10,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:10,682 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2021-01-06 09:38:10,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 09:38:10,682 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2021-01-06 09:38:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 09:38:10,683 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:10,683 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:10,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 09:38:10,898 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:10,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:10,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2135143941, now seen corresponding path program 19 times [2021-01-06 09:38:10,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:10,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906465309] [2021-01-06 09:38:10,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-01-06 09:38:11,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906465309] [2021-01-06 09:38:11,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705143461] [2021-01-06 09:38:11,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:11,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:38:11,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-01-06 09:38:11,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:11,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 09:38:11,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915243616] [2021-01-06 09:38:11,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:38:11,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:11,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:38:11,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:38:11,415 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand 23 states. [2021-01-06 09:38:11,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:11,487 INFO L93 Difference]: Finished difference Result 188 states and 236 transitions. [2021-01-06 09:38:11,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:38:11,488 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 80 [2021-01-06 09:38:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:11,489 INFO L225 Difference]: With dead ends: 188 [2021-01-06 09:38:11,489 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 09:38:11,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:38:11,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 09:38:11,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-01-06 09:38:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 09:38:11,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2021-01-06 09:38:11,495 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 80 [2021-01-06 09:38:11,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:11,496 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2021-01-06 09:38:11,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:38:11,496 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2021-01-06 09:38:11,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 09:38:11,497 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:11,497 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:11,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 09:38:11,711 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:11,712 INFO L82 PathProgramCache]: Analyzing trace with hash -70497539, now seen corresponding path program 20 times [2021-01-06 09:38:11,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:11,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152239989] [2021-01-06 09:38:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-01-06 09:38:12,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152239989] [2021-01-06 09:38:12,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350321302] [2021-01-06 09:38:12,019 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:12,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:12,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:38:12,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-01-06 09:38:12,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:12,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 09:38:12,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991741730] [2021-01-06 09:38:12,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:38:12,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:12,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:38:12,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:38:12,205 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand 24 states. [2021-01-06 09:38:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:12,287 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2021-01-06 09:38:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 09:38:12,294 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2021-01-06 09:38:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:12,295 INFO L225 Difference]: With dead ends: 190 [2021-01-06 09:38:12,295 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 09:38:12,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:38:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 09:38:12,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-01-06 09:38:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 09:38:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2021-01-06 09:38:12,305 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 82 [2021-01-06 09:38:12,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:12,305 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2021-01-06 09:38:12,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:38:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2021-01-06 09:38:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 09:38:12,307 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:12,308 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:12,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:12,523 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:12,524 INFO L82 PathProgramCache]: Analyzing trace with hash -220195969, now seen corresponding path program 21 times [2021-01-06 09:38:12,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:12,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79141285] [2021-01-06 09:38:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-01-06 09:38:12,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79141285] [2021-01-06 09:38:12,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642510050] [2021-01-06 09:38:12,902 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:13,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 09:38:13,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:13,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:38:13,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 09:38:13,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:13,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2021-01-06 09:38:13,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165467796] [2021-01-06 09:38:13,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 09:38:13,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:13,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 09:38:13,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:38:13,465 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 35 states. [2021-01-06 09:38:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:13,623 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2021-01-06 09:38:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 09:38:13,624 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2021-01-06 09:38:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:13,625 INFO L225 Difference]: With dead ends: 202 [2021-01-06 09:38:13,625 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 09:38:13,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:38:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 09:38:13,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2021-01-06 09:38:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 09:38:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2021-01-06 09:38:13,630 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 84 [2021-01-06 09:38:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:13,631 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2021-01-06 09:38:13,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 09:38:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2021-01-06 09:38:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 09:38:13,632 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:13,632 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:13,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 09:38:13,847 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:13,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1727048385, now seen corresponding path program 22 times [2021-01-06 09:38:13,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:13,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011004318] [2021-01-06 09:38:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-01-06 09:38:14,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011004318] [2021-01-06 09:38:14,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643814044] [2021-01-06 09:38:14,232 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:14,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:14,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:14,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 09:38:14,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-01-06 09:38:14,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:14,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 09:38:14,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619372116] [2021-01-06 09:38:14,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 09:38:14,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:14,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 09:38:14,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:38:14,430 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand 26 states. [2021-01-06 09:38:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:14,510 INFO L93 Difference]: Finished difference Result 206 states and 258 transitions. [2021-01-06 09:38:14,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 09:38:14,511 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 89 [2021-01-06 09:38:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:14,512 INFO L225 Difference]: With dead ends: 206 [2021-01-06 09:38:14,512 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 09:38:14,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:38:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 09:38:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-01-06 09:38:14,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 09:38:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2021-01-06 09:38:14,517 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 89 [2021-01-06 09:38:14,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:14,517 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2021-01-06 09:38:14,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 09:38:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2021-01-06 09:38:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 09:38:14,519 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:14,519 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:14,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:14,736 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:14,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1880839169, now seen corresponding path program 23 times [2021-01-06 09:38:14,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:14,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039048151] [2021-01-06 09:38:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-01-06 09:38:15,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039048151] [2021-01-06 09:38:15,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123032266] [2021-01-06 09:38:15,171 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:15,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-01-06 09:38:15,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:15,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:38:15,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 09:38:16,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:16,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2021-01-06 09:38:16,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537095796] [2021-01-06 09:38:16,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 09:38:16,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:16,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 09:38:16,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:38:16,073 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand 38 states. [2021-01-06 09:38:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:16,260 INFO L93 Difference]: Finished difference Result 218 states and 276 transitions. [2021-01-06 09:38:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 09:38:16,261 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 91 [2021-01-06 09:38:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:16,262 INFO L225 Difference]: With dead ends: 218 [2021-01-06 09:38:16,262 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 09:38:16,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:38:16,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 09:38:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-01-06 09:38:16,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-01-06 09:38:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2021-01-06 09:38:16,268 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 91 [2021-01-06 09:38:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:16,268 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2021-01-06 09:38:16,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 09:38:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2021-01-06 09:38:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 09:38:16,269 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:16,269 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:16,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 09:38:16,485 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:16,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1961812219, now seen corresponding path program 24 times [2021-01-06 09:38:16,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:16,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229740160] [2021-01-06 09:38:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-01-06 09:38:16,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229740160] [2021-01-06 09:38:16,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185754781] [2021-01-06 09:38:16,955 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:18,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 09:38:18,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:18,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:38:18,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 09:38:18,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:18,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 40 [2021-01-06 09:38:18,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146848118] [2021-01-06 09:38:18,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 09:38:18,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:18,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 09:38:18,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 09:38:18,507 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand 40 states. [2021-01-06 09:38:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:18,703 INFO L93 Difference]: Finished difference Result 232 states and 294 transitions. [2021-01-06 09:38:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 09:38:18,704 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 96 [2021-01-06 09:38:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:18,705 INFO L225 Difference]: With dead ends: 232 [2021-01-06 09:38:18,705 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 09:38:18,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 09:38:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 09:38:18,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2021-01-06 09:38:18,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 09:38:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2021-01-06 09:38:18,711 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 96 [2021-01-06 09:38:18,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:18,711 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2021-01-06 09:38:18,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 09:38:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2021-01-06 09:38:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 09:38:18,712 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:18,713 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:18,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 09:38:18,928 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:18,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash -226001797, now seen corresponding path program 25 times [2021-01-06 09:38:18,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:18,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110400709] [2021-01-06 09:38:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-01-06 09:38:19,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110400709] [2021-01-06 09:38:19,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175802643] [2021-01-06 09:38:19,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:19,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 09:38:19,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-01-06 09:38:19,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:19,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 09:38:19,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696450129] [2021-01-06 09:38:19,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:38:19,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:19,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:38:19,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:38:19,597 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand 29 states. [2021-01-06 09:38:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:19,676 INFO L93 Difference]: Finished difference Result 236 states and 296 transitions. [2021-01-06 09:38:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 09:38:19,677 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 101 [2021-01-06 09:38:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:19,678 INFO L225 Difference]: With dead ends: 236 [2021-01-06 09:38:19,678 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 09:38:19,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:38:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 09:38:19,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-01-06 09:38:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 09:38:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2021-01-06 09:38:19,684 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 101 [2021-01-06 09:38:19,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:19,684 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2021-01-06 09:38:19,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:38:19,684 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2021-01-06 09:38:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-01-06 09:38:19,685 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:19,686 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:19,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 09:38:19,900 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:19,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:19,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1807904583, now seen corresponding path program 26 times [2021-01-06 09:38:19,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:19,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833080755] [2021-01-06 09:38:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-01-06 09:38:20,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833080755] [2021-01-06 09:38:20,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459755118] [2021-01-06 09:38:20,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:20,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:20,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:20,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 09:38:20,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-01-06 09:38:20,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:20,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 09:38:20,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122331233] [2021-01-06 09:38:20,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 09:38:20,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:20,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 09:38:20,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:38:20,603 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand 30 states. [2021-01-06 09:38:20,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:20,701 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2021-01-06 09:38:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 09:38:20,702 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 103 [2021-01-06 09:38:20,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:20,703 INFO L225 Difference]: With dead ends: 238 [2021-01-06 09:38:20,703 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 09:38:20,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:38:20,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 09:38:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-01-06 09:38:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 09:38:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2021-01-06 09:38:20,709 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 103 [2021-01-06 09:38:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:20,709 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2021-01-06 09:38:20,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 09:38:20,709 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2021-01-06 09:38:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 09:38:20,710 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:20,710 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:20,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 09:38:20,924 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1598059145, now seen corresponding path program 27 times [2021-01-06 09:38:20,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:20,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276736157] [2021-01-06 09:38:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-01-06 09:38:21,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276736157] [2021-01-06 09:38:21,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791758992] [2021-01-06 09:38:21,454 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:21,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 09:38:21,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:21,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:38:21,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-01-06 09:38:22,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:22,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16] total 44 [2021-01-06 09:38:22,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412619408] [2021-01-06 09:38:22,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 09:38:22,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:22,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 09:38:22,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 09:38:22,117 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand 44 states. [2021-01-06 09:38:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:22,318 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2021-01-06 09:38:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 09:38:22,319 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 105 [2021-01-06 09:38:22,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:22,320 INFO L225 Difference]: With dead ends: 250 [2021-01-06 09:38:22,320 INFO L226 Difference]: Without dead ends: 160 [2021-01-06 09:38:22,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 09:38:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-01-06 09:38:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2021-01-06 09:38:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 09:38:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2021-01-06 09:38:22,326 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 105 [2021-01-06 09:38:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:22,326 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2021-01-06 09:38:22,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 09:38:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2021-01-06 09:38:22,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 09:38:22,327 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:22,327 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:22,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:22,541 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:22,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1910005517, now seen corresponding path program 28 times [2021-01-06 09:38:22,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:22,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162553036] [2021-01-06 09:38:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 09:38:23,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162553036] [2021-01-06 09:38:23,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821086266] [2021-01-06 09:38:23,084 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:23,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:23,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:23,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 09:38:23,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 09:38:23,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:23,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 09:38:23,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579975538] [2021-01-06 09:38:23,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 09:38:23,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:23,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 09:38:23,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:38:23,295 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand 32 states. [2021-01-06 09:38:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:23,399 INFO L93 Difference]: Finished difference Result 254 states and 318 transitions. [2021-01-06 09:38:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 09:38:23,399 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 110 [2021-01-06 09:38:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:23,400 INFO L225 Difference]: With dead ends: 254 [2021-01-06 09:38:23,400 INFO L226 Difference]: Without dead ends: 158 [2021-01-06 09:38:23,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:38:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-01-06 09:38:23,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-01-06 09:38:23,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 09:38:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 189 transitions. [2021-01-06 09:38:23,406 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 189 transitions. Word has length 110 [2021-01-06 09:38:23,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:23,406 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 189 transitions. [2021-01-06 09:38:23,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 09:38:23,406 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 189 transitions. [2021-01-06 09:38:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 09:38:23,407 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:23,407 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:23,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:23,622 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:23,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:23,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1132605583, now seen corresponding path program 29 times [2021-01-06 09:38:23,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:23,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110521822] [2021-01-06 09:38:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 09:38:24,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110521822] [2021-01-06 09:38:24,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696166057] [2021-01-06 09:38:24,265 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:28,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-01-06 09:38:28,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:28,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:38:28,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-01-06 09:38:28,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:28,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 17] total 47 [2021-01-06 09:38:28,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312546291] [2021-01-06 09:38:28,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 09:38:28,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:28,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 09:38:28,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 09:38:28,657 INFO L87 Difference]: Start difference. First operand 157 states and 189 transitions. Second operand 47 states. [2021-01-06 09:38:28,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:28,916 INFO L93 Difference]: Finished difference Result 266 states and 336 transitions. [2021-01-06 09:38:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 09:38:28,916 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 112 [2021-01-06 09:38:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:28,917 INFO L225 Difference]: With dead ends: 266 [2021-01-06 09:38:28,917 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 09:38:28,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 09:38:28,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 09:38:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-01-06 09:38:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 09:38:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2021-01-06 09:38:28,924 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 112 [2021-01-06 09:38:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:28,924 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2021-01-06 09:38:28,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 09:38:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2021-01-06 09:38:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 09:38:28,925 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:28,925 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:29,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:29,141 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:29,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:29,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1997294257, now seen corresponding path program 30 times [2021-01-06 09:38:29,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:29,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138718753] [2021-01-06 09:38:29,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-01-06 09:38:29,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138718753] [2021-01-06 09:38:29,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595296487] [2021-01-06 09:38:29,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:32,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 09:38:32,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:32,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:38:32,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-01-06 09:38:33,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:33,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 18] total 49 [2021-01-06 09:38:33,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711327771] [2021-01-06 09:38:33,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 09:38:33,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:33,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 09:38:33,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 09:38:33,298 INFO L87 Difference]: Start difference. First operand 165 states and 199 transitions. Second operand 49 states. [2021-01-06 09:38:33,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:33,551 INFO L93 Difference]: Finished difference Result 280 states and 354 transitions. [2021-01-06 09:38:33,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 09:38:33,552 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 117 [2021-01-06 09:38:33,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:33,553 INFO L225 Difference]: With dead ends: 280 [2021-01-06 09:38:33,553 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 09:38:33,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 09:38:33,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 09:38:33,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2021-01-06 09:38:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 09:38:33,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 209 transitions. [2021-01-06 09:38:33,559 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 209 transitions. Word has length 117 [2021-01-06 09:38:33,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:33,560 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 209 transitions. [2021-01-06 09:38:33,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 09:38:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 209 transitions. [2021-01-06 09:38:33,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-01-06 09:38:33,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:33,561 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:33,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 09:38:33,775 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:33,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1124602733, now seen corresponding path program 31 times [2021-01-06 09:38:33,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:33,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027311919] [2021-01-06 09:38:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-01-06 09:38:34,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027311919] [2021-01-06 09:38:34,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532815862] [2021-01-06 09:38:34,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:34,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 09:38:34,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-01-06 09:38:34,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:34,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 09:38:34,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190194462] [2021-01-06 09:38:34,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 09:38:34,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:34,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 09:38:34,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:38:34,641 INFO L87 Difference]: Start difference. First operand 173 states and 209 transitions. Second operand 35 states. [2021-01-06 09:38:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:34,759 INFO L93 Difference]: Finished difference Result 284 states and 356 transitions. [2021-01-06 09:38:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 09:38:34,759 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 122 [2021-01-06 09:38:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:34,760 INFO L225 Difference]: With dead ends: 284 [2021-01-06 09:38:34,760 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 09:38:34,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:38:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 09:38:34,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-01-06 09:38:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 09:38:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-01-06 09:38:34,767 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 122 [2021-01-06 09:38:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:34,767 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-01-06 09:38:34,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 09:38:34,768 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-01-06 09:38:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 09:38:34,768 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:34,768 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:34,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:34,982 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:34,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1878625045, now seen corresponding path program 32 times [2021-01-06 09:38:34,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:34,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864202470] [2021-01-06 09:38:34,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-01-06 09:38:35,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864202470] [2021-01-06 09:38:35,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551072220] [2021-01-06 09:38:35,731 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:35,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:35,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:35,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 09:38:35,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-01-06 09:38:35,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:35,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 09:38:35,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480954417] [2021-01-06 09:38:35,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 09:38:35,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:35,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 09:38:35,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:38:35,987 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand 36 states. [2021-01-06 09:38:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:36,102 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2021-01-06 09:38:36,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 09:38:36,103 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2021-01-06 09:38:36,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:36,104 INFO L225 Difference]: With dead ends: 286 [2021-01-06 09:38:36,104 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 09:38:36,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:38:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 09:38:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-01-06 09:38:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 09:38:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2021-01-06 09:38:36,110 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 124 [2021-01-06 09:38:36,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:36,110 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2021-01-06 09:38:36,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 09:38:36,110 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2021-01-06 09:38:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 09:38:36,111 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:36,111 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:36,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 09:38:36,326 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:36,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:36,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1762496791, now seen corresponding path program 33 times [2021-01-06 09:38:36,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:36,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835989133] [2021-01-06 09:38:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-01-06 09:38:37,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835989133] [2021-01-06 09:38:37,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333724097] [2021-01-06 09:38:37,098 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:37,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 09:38:37,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:37,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:38:37,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-01-06 09:38:38,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:38,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19] total 53 [2021-01-06 09:38:38,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141906480] [2021-01-06 09:38:38,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 09:38:38,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:38,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 09:38:38,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 09:38:38,070 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand 53 states. [2021-01-06 09:38:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:38,396 INFO L93 Difference]: Finished difference Result 298 states and 376 transitions. [2021-01-06 09:38:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 09:38:38,397 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 126 [2021-01-06 09:38:38,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:38,398 INFO L225 Difference]: With dead ends: 298 [2021-01-06 09:38:38,398 INFO L226 Difference]: Without dead ends: 190 [2021-01-06 09:38:38,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 09:38:38,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-01-06 09:38:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2021-01-06 09:38:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 09:38:38,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 223 transitions. [2021-01-06 09:38:38,404 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 223 transitions. Word has length 126 [2021-01-06 09:38:38,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:38,405 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 223 transitions. [2021-01-06 09:38:38,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 09:38:38,405 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 223 transitions. [2021-01-06 09:38:38,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-01-06 09:38:38,406 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:38,406 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:38,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:38,620 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:38,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:38,621 INFO L82 PathProgramCache]: Analyzing trace with hash 247814313, now seen corresponding path program 34 times [2021-01-06 09:38:38,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:38,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988506401] [2021-01-06 09:38:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-01-06 09:38:39,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988506401] [2021-01-06 09:38:39,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789487062] [2021-01-06 09:38:39,401 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:39,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:39,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:39,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 09:38:39,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-01-06 09:38:39,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:39,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 09:38:39,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445462364] [2021-01-06 09:38:39,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 09:38:39,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:39,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 09:38:39,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:38:39,656 INFO L87 Difference]: Start difference. First operand 185 states and 223 transitions. Second operand 38 states. [2021-01-06 09:38:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:39,811 INFO L93 Difference]: Finished difference Result 302 states and 378 transitions. [2021-01-06 09:38:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 09:38:39,812 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 131 [2021-01-06 09:38:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:39,813 INFO L225 Difference]: With dead ends: 302 [2021-01-06 09:38:39,814 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 09:38:39,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:38:39,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 09:38:39,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-01-06 09:38:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-01-06 09:38:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 225 transitions. [2021-01-06 09:38:39,820 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 225 transitions. Word has length 131 [2021-01-06 09:38:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:39,820 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 225 transitions. [2021-01-06 09:38:39,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 09:38:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 225 transitions. [2021-01-06 09:38:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-01-06 09:38:39,821 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:39,822 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:40,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 09:38:40,037 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:40,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:40,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1912542105, now seen corresponding path program 35 times [2021-01-06 09:38:40,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:40,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599085576] [2021-01-06 09:38:40,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-01-06 09:38:40,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599085576] [2021-01-06 09:38:40,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440529545] [2021-01-06 09:38:40,854 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:46,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-01-06 09:38:46,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:46,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 09:38:46,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-01-06 09:38:47,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:47,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 20] total 56 [2021-01-06 09:38:47,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329671425] [2021-01-06 09:38:47,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 09:38:47,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:47,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 09:38:47,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 09:38:47,341 INFO L87 Difference]: Start difference. First operand 187 states and 225 transitions. Second operand 56 states. [2021-01-06 09:38:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:47,577 INFO L93 Difference]: Finished difference Result 314 states and 396 transitions. [2021-01-06 09:38:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 09:38:47,578 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 133 [2021-01-06 09:38:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:47,579 INFO L225 Difference]: With dead ends: 314 [2021-01-06 09:38:47,579 INFO L226 Difference]: Without dead ends: 200 [2021-01-06 09:38:47,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 09:38:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-01-06 09:38:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2021-01-06 09:38:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 09:38:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 235 transitions. [2021-01-06 09:38:47,588 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 235 transitions. Word has length 133 [2021-01-06 09:38:47,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:47,588 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 235 transitions. [2021-01-06 09:38:47,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 09:38:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 235 transitions. [2021-01-06 09:38:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 09:38:47,589 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:47,590 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:47,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 09:38:47,804 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:47,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:47,805 INFO L82 PathProgramCache]: Analyzing trace with hash 550249245, now seen corresponding path program 36 times [2021-01-06 09:38:47,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:47,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67662797] [2021-01-06 09:38:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2021-01-06 09:38:48,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67662797] [2021-01-06 09:38:48,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113901182] [2021-01-06 09:38:48,722 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:03,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-01-06 09:39:03,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:03,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 09:39:03,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 72 proven. 477 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-01-06 09:39:04,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:04,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 23] total 60 [2021-01-06 09:39:04,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810084801] [2021-01-06 09:39:04,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 09:39:04,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:04,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 09:39:04,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1029, Invalid=2511, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 09:39:04,321 INFO L87 Difference]: Start difference. First operand 195 states and 235 transitions. Second operand 60 states. [2021-01-06 09:39:05,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:05,381 INFO L93 Difference]: Finished difference Result 329 states and 416 transitions. [2021-01-06 09:39:05,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 09:39:05,382 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 138 [2021-01-06 09:39:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:05,383 INFO L225 Difference]: With dead ends: 329 [2021-01-06 09:39:05,383 INFO L226 Difference]: Without dead ends: 209 [2021-01-06 09:39:05,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1447, Invalid=4715, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 09:39:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-01-06 09:39:05,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2021-01-06 09:39:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2021-01-06 09:39:05,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2021-01-06 09:39:05,390 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 138 [2021-01-06 09:39:05,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:05,390 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2021-01-06 09:39:05,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 09:39:05,390 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2021-01-06 09:39:05,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-01-06 09:39:05,391 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:05,391 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:05,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 09:39:05,592 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:05,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1263614625, now seen corresponding path program 37 times [2021-01-06 09:39:05,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:05,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943947917] [2021-01-06 09:39:05,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-01-06 09:39:06,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943947917] [2021-01-06 09:39:06,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410631556] [2021-01-06 09:39:06,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:06,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 09:39:06,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-01-06 09:39:06,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:06,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 09:39:06,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243203522] [2021-01-06 09:39:06,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 09:39:06,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:06,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 09:39:06,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 09:39:06,896 INFO L87 Difference]: Start difference. First operand 205 states and 247 transitions. Second operand 42 states. [2021-01-06 09:39:07,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:07,069 INFO L93 Difference]: Finished difference Result 334 states and 418 transitions. [2021-01-06 09:39:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 09:39:07,069 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 145 [2021-01-06 09:39:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:07,070 INFO L225 Difference]: With dead ends: 334 [2021-01-06 09:39:07,070 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 09:39:07,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 09:39:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 09:39:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-01-06 09:39:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-01-06 09:39:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 249 transitions. [2021-01-06 09:39:07,075 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 249 transitions. Word has length 145 [2021-01-06 09:39:07,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:07,075 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 249 transitions. [2021-01-06 09:39:07,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 09:39:07,075 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 249 transitions. [2021-01-06 09:39:07,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-01-06 09:39:07,076 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:07,076 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:07,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 09:39:07,277 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:07,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:07,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1238865441, now seen corresponding path program 38 times [2021-01-06 09:39:07,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:07,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894400289] [2021-01-06 09:39:07,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-01-06 09:39:08,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894400289] [2021-01-06 09:39:08,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330707286] [2021-01-06 09:39:08,360 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:08,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:39:08,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:08,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 09:39:08,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-01-06 09:39:08,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:08,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 09:39:08,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169068534] [2021-01-06 09:39:08,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 09:39:08,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:08,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 09:39:08,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 09:39:08,640 INFO L87 Difference]: Start difference. First operand 207 states and 249 transitions. Second operand 43 states. [2021-01-06 09:39:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:08,788 INFO L93 Difference]: Finished difference Result 336 states and 420 transitions. [2021-01-06 09:39:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 09:39:08,789 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 147 [2021-01-06 09:39:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:08,790 INFO L225 Difference]: With dead ends: 336 [2021-01-06 09:39:08,790 INFO L226 Difference]: Without dead ends: 210 [2021-01-06 09:39:08,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 09:39:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-01-06 09:39:08,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-01-06 09:39:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-01-06 09:39:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 251 transitions. [2021-01-06 09:39:08,802 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 251 transitions. Word has length 147 [2021-01-06 09:39:08,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:08,802 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 251 transitions. [2021-01-06 09:39:08,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 09:39:08,803 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 251 transitions. [2021-01-06 09:39:08,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-01-06 09:39:08,804 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:08,804 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:09,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:09,018 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:09,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:09,019 INFO L82 PathProgramCache]: Analyzing trace with hash -940523107, now seen corresponding path program 39 times [2021-01-06 09:39:09,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:09,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465114297] [2021-01-06 09:39:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-01-06 09:39:10,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465114297] [2021-01-06 09:39:10,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522487348] [2021-01-06 09:39:10,146 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:10,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-01-06 09:39:10,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:10,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 09:39:10,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 80 proven. 532 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2021-01-06 09:39:11,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:11,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 24] total 65 [2021-01-06 09:39:11,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900753609] [2021-01-06 09:39:11,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 09:39:11,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:11,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 09:39:11,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 09:39:11,683 INFO L87 Difference]: Start difference. First operand 209 states and 251 transitions. Second operand 65 states. [2021-01-06 09:39:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:12,966 INFO L93 Difference]: Finished difference Result 349 states and 440 transitions. [2021-01-06 09:39:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 09:39:12,966 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 149 [2021-01-06 09:39:12,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:12,968 INFO L225 Difference]: With dead ends: 349 [2021-01-06 09:39:12,968 INFO L226 Difference]: Without dead ends: 223 [2021-01-06 09:39:12,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1680, Invalid=5460, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 09:39:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-01-06 09:39:12,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2021-01-06 09:39:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2021-01-06 09:39:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 263 transitions. [2021-01-06 09:39:12,973 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 263 transitions. Word has length 149 [2021-01-06 09:39:12,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:12,974 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 263 transitions. [2021-01-06 09:39:12,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 09:39:12,974 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 263 transitions. [2021-01-06 09:39:12,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-01-06 09:39:12,974 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:12,975 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:13,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 09:39:13,187 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:13,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1691192489, now seen corresponding path program 40 times [2021-01-06 09:39:13,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:13,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294146951] [2021-01-06 09:39:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2021-01-06 09:39:14,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294146951] [2021-01-06 09:39:14,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210015084] [2021-01-06 09:39:14,430 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:14,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:39:14,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:14,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:39:14,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 1 proven. 590 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2021-01-06 09:39:15,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:15,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 23] total 66 [2021-01-06 09:39:15,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164664347] [2021-01-06 09:39:15,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 09:39:15,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:15,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 09:39:15,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 09:39:15,595 INFO L87 Difference]: Start difference. First operand 219 states and 263 transitions. Second operand 66 states. [2021-01-06 09:39:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:16,004 INFO L93 Difference]: Finished difference Result 364 states and 458 transitions. [2021-01-06 09:39:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 09:39:16,004 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 156 [2021-01-06 09:39:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:16,006 INFO L225 Difference]: With dead ends: 364 [2021-01-06 09:39:16,006 INFO L226 Difference]: Without dead ends: 232 [2021-01-06 09:39:16,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 09:39:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-01-06 09:39:16,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 227. [2021-01-06 09:39:16,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2021-01-06 09:39:16,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 273 transitions. [2021-01-06 09:39:16,014 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 273 transitions. Word has length 156 [2021-01-06 09:39:16,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:16,014 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 273 transitions. [2021-01-06 09:39:16,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 09:39:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 273 transitions. [2021-01-06 09:39:16,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 09:39:16,015 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:16,015 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:16,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:16,229 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:16,230 INFO L82 PathProgramCache]: Analyzing trace with hash -682288297, now seen corresponding path program 41 times [2021-01-06 09:39:16,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:16,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777370453] [2021-01-06 09:39:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-01-06 09:39:17,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777370453] [2021-01-06 09:39:17,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359177008] [2021-01-06 09:39:17,550 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:40:06,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-01-06 09:40:06,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:40:06,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 09:40:06,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:40:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 1 proven. 651 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2021-01-06 09:40:07,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:40:07,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 24] total 68 [2021-01-06 09:40:07,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894534099] [2021-01-06 09:40:07,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 09:40:07,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:40:07,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 09:40:07,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1310, Invalid=3246, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 09:40:07,748 INFO L87 Difference]: Start difference. First operand 227 states and 273 transitions. Second operand 68 states. [2021-01-06 09:40:08,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:40:08,115 INFO L93 Difference]: Finished difference Result 378 states and 476 transitions. [2021-01-06 09:40:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 09:40:08,116 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 161 [2021-01-06 09:40:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:40:08,117 INFO L225 Difference]: With dead ends: 378 [2021-01-06 09:40:08,117 INFO L226 Difference]: Without dead ends: 240 [2021-01-06 09:40:08,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1310, Invalid=3246, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 09:40:08,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-01-06 09:40:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2021-01-06 09:40:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2021-01-06 09:40:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 283 transitions. [2021-01-06 09:40:08,124 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 283 transitions. Word has length 161 [2021-01-06 09:40:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:40:08,124 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 283 transitions. [2021-01-06 09:40:08,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 09:40:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 283 transitions. [2021-01-06 09:40:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 09:40:08,126 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:40:08,126 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:40:08,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:40:08,327 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:40:08,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:40:08,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1050437843, now seen corresponding path program 42 times [2021-01-06 09:40:08,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:40:08,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506675158] [2021-01-06 09:40:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:40:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:40:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-01-06 09:40:09,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506675158] [2021-01-06 09:40:09,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754528664] [2021-01-06 09:40:09,618 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:40:27,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2021-01-06 09:40:27,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:40:27,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 09:40:27,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:40:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2021-01-06 09:40:28,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:40:28,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 25] total 70 [2021-01-06 09:40:28,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906202020] [2021-01-06 09:40:28,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 09:40:28,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:40:28,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 09:40:28,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3450, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 09:40:28,709 INFO L87 Difference]: Start difference. First operand 235 states and 283 transitions. Second operand 70 states. [2021-01-06 09:40:29,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:40:29,070 INFO L93 Difference]: Finished difference Result 392 states and 494 transitions. [2021-01-06 09:40:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-01-06 09:40:29,071 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 166 [2021-01-06 09:40:29,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:40:29,072 INFO L225 Difference]: With dead ends: 392 [2021-01-06 09:40:29,073 INFO L226 Difference]: Without dead ends: 248 [2021-01-06 09:40:29,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1380, Invalid=3450, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 09:40:29,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-01-06 09:40:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 243. [2021-01-06 09:40:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2021-01-06 09:40:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 293 transitions. [2021-01-06 09:40:29,081 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 293 transitions. Word has length 166 [2021-01-06 09:40:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:40:29,081 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 293 transitions. [2021-01-06 09:40:29,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 09:40:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 293 transitions. [2021-01-06 09:40:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-01-06 09:40:29,082 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:40:29,083 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:40:29,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 09:40:29,298 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:40:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:40:29,299 INFO L82 PathProgramCache]: Analyzing trace with hash -180945709, now seen corresponding path program 43 times [2021-01-06 09:40:29,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:40:29,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757049238] [2021-01-06 09:40:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:40:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:40:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-01-06 09:40:30,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757049238] [2021-01-06 09:40:30,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367797551] [2021-01-06 09:40:30,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:40:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:40:30,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 09:40:30,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:40:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-01-06 09:40:31,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:40:31,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 09:40:31,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009132163] [2021-01-06 09:40:31,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 09:40:31,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:40:31,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 09:40:31,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 09:40:31,019 INFO L87 Difference]: Start difference. First operand 243 states and 293 transitions. Second operand 49 states. [2021-01-06 09:40:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:40:31,204 INFO L93 Difference]: Finished difference Result 396 states and 496 transitions. [2021-01-06 09:40:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 09:40:31,204 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 171 [2021-01-06 09:40:31,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:40:31,205 INFO L225 Difference]: With dead ends: 396 [2021-01-06 09:40:31,205 INFO L226 Difference]: Without dead ends: 246 [2021-01-06 09:40:31,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 09:40:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-01-06 09:40:31,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-01-06 09:40:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2021-01-06 09:40:31,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 295 transitions. [2021-01-06 09:40:31,213 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 295 transitions. Word has length 171 [2021-01-06 09:40:31,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:40:31,213 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 295 transitions. [2021-01-06 09:40:31,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 09:40:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 295 transitions. [2021-01-06 09:40:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-01-06 09:40:31,214 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:40:31,214 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:40:31,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 09:40:31,426 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:40:31,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:40:31,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1258063215, now seen corresponding path program 44 times [2021-01-06 09:40:31,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:40:31,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588522153] [2021-01-06 09:40:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:40:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:40:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2899 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-01-06 09:40:32,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588522153] [2021-01-06 09:40:32,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447050601] [2021-01-06 09:40:32,854 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:40:32,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:40:32,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:40:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 09:40:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:40:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2899 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-01-06 09:40:33,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:40:33,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 09:40:33,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4909737] [2021-01-06 09:40:33,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 09:40:33,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:40:33,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 09:40:33,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 09:40:33,183 INFO L87 Difference]: Start difference. First operand 245 states and 295 transitions. Second operand 50 states. [2021-01-06 09:40:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:40:33,377 INFO L93 Difference]: Finished difference Result 398 states and 498 transitions. [2021-01-06 09:40:33,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 09:40:33,378 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 173 [2021-01-06 09:40:33,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:40:33,379 INFO L225 Difference]: With dead ends: 398 [2021-01-06 09:40:33,379 INFO L226 Difference]: Without dead ends: 248 [2021-01-06 09:40:33,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 09:40:33,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-01-06 09:40:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2021-01-06 09:40:33,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2021-01-06 09:40:33,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 297 transitions. [2021-01-06 09:40:33,386 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 297 transitions. Word has length 173 [2021-01-06 09:40:33,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:40:33,386 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 297 transitions. [2021-01-06 09:40:33,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 09:40:33,387 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 297 transitions. [2021-01-06 09:40:33,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-01-06 09:40:33,388 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:40:33,388 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:40:33,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 09:40:33,601 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:40:33,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:40:33,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1280868145, now seen corresponding path program 45 times [2021-01-06 09:40:33,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:40:33,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935004296] [2021-01-06 09:40:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:40:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:40:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-01-06 09:40:35,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935004296] [2021-01-06 09:40:35,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889770718] [2021-01-06 09:40:35,095 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:40:36,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-01-06 09:40:36,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:40:36,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 09:40:36,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:40:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 94 proven. 782 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-01-06 09:40:37,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:40:37,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 28] total 76 [2021-01-06 09:40:37,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292520669] [2021-01-06 09:40:37,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-01-06 09:40:37,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:40:37,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-01-06 09:40:37,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1650, Invalid=4050, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 09:40:37,614 INFO L87 Difference]: Start difference. First operand 247 states and 297 transitions. Second operand 76 states. [2021-01-06 09:40:39,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:40:39,296 INFO L93 Difference]: Finished difference Result 411 states and 518 transitions. [2021-01-06 09:40:39,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-01-06 09:40:39,297 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 175 [2021-01-06 09:40:39,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:40:39,298 INFO L225 Difference]: With dead ends: 411 [2021-01-06 09:40:39,299 INFO L226 Difference]: Without dead ends: 261 [2021-01-06 09:40:39,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2298, Invalid=7602, Unknown=0, NotChecked=0, Total=9900 [2021-01-06 09:40:39,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-01-06 09:40:39,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2021-01-06 09:40:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2021-01-06 09:40:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 309 transitions. [2021-01-06 09:40:39,308 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 309 transitions. Word has length 175 [2021-01-06 09:40:39,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:40:39,309 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 309 transitions. [2021-01-06 09:40:39,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2021-01-06 09:40:39,309 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 309 transitions. [2021-01-06 09:40:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-01-06 09:40:39,310 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:40:39,310 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:40:39,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:40:39,524 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:40:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:40:39,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1237945143, now seen corresponding path program 46 times [2021-01-06 09:40:39,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:40:39,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153485278] [2021-01-06 09:40:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:40:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:40:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2021-01-06 09:40:41,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153485278] [2021-01-06 09:40:41,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527932323] [2021-01-06 09:40:41,151 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:40:41,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:40:41,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:40:41,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 09:40:41,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:40:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2021-01-06 09:40:41,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:40:41,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 09:40:41,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933019749] [2021-01-06 09:40:41,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 09:40:41,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:40:41,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 09:40:41,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 09:40:41,488 INFO L87 Difference]: Start difference. First operand 257 states and 309 transitions. Second operand 53 states. [2021-01-06 09:40:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:40:41,698 INFO L93 Difference]: Finished difference Result 416 states and 520 transitions. [2021-01-06 09:40:41,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 09:40:41,699 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 182 [2021-01-06 09:40:41,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:40:41,700 INFO L225 Difference]: With dead ends: 416 [2021-01-06 09:40:41,700 INFO L226 Difference]: Without dead ends: 260 [2021-01-06 09:40:41,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 09:40:41,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-01-06 09:40:41,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-01-06 09:40:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2021-01-06 09:40:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 311 transitions. [2021-01-06 09:40:41,708 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 311 transitions. Word has length 182 [2021-01-06 09:40:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:40:41,708 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 311 transitions. [2021-01-06 09:40:41,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 09:40:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 311 transitions. [2021-01-06 09:40:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-01-06 09:40:41,709 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:40:41,710 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:40:41,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 09:40:41,923 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:40:41,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:40:41,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1712695993, now seen corresponding path program 47 times [2021-01-06 09:40:41,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:40:41,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27853251] [2021-01-06 09:40:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:40:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:40:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2021-01-06 09:40:43,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27853251] [2021-01-06 09:40:43,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744356083] [2021-01-06 09:40:43,630 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:41:26,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2021-01-06 09:41:26,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:41:26,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 09:41:26,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:41:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 1 proven. 852 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2021-01-06 09:41:27,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:41:27,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 27] total 78 [2021-01-06 09:41:27,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827814022] [2021-01-06 09:41:27,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-01-06 09:41:27,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:41:27,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-01-06 09:41:27,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1728, Invalid=4278, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 09:41:27,784 INFO L87 Difference]: Start difference. First operand 259 states and 311 transitions. Second operand 78 states. [2021-01-06 09:41:28,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:41:28,240 INFO L93 Difference]: Finished difference Result 428 states and 538 transitions. [2021-01-06 09:41:28,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 09:41:28,241 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 184 [2021-01-06 09:41:28,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:41:28,246 INFO L225 Difference]: With dead ends: 428 [2021-01-06 09:41:28,246 INFO L226 Difference]: Without dead ends: 272 [2021-01-06 09:41:28,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1728, Invalid=4278, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 09:41:28,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-01-06 09:41:28,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 267. [2021-01-06 09:41:28,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2021-01-06 09:41:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 321 transitions. [2021-01-06 09:41:28,254 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 321 transitions. Word has length 184 [2021-01-06 09:41:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:41:28,254 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 321 transitions. [2021-01-06 09:41:28,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2021-01-06 09:41:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 321 transitions. [2021-01-06 09:41:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-01-06 09:41:28,255 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:41:28,256 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:41:28,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 09:41:28,456 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:41:28,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:41:28,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1136663111, now seen corresponding path program 48 times [2021-01-06 09:41:28,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:41:28,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905350392] [2021-01-06 09:41:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:41:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:41:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3527 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2021-01-06 09:41:30,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905350392] [2021-01-06 09:41:30,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729912109] [2021-01-06 09:41:30,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true