/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-crafted/mapsum4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:44:39,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:44:39,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:44:39,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:44:39,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:44:39,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:44:39,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:44:39,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:44:39,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:44:39,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:44:39,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:44:39,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:44:39,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:44:39,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:44:39,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:44:39,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:44:39,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:44:39,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:44:39,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:44:39,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:44:39,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:44:39,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:44:39,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:44:39,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:44:39,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:44:39,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:44:39,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:44:39,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:44:39,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:44:39,887 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:44:39,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:44:39,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:44:39,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:44:39,892 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:44:39,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:44:39,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:44:39,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:44:39,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:44:39,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:44:39,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:44:39,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:44:39,893 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:44:39,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:44:39,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:44:39,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:44:39,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:44:39,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:44:39,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:44:39,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:44:39,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:44:39,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:44:39,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:44:39,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:44:39,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:44:39,896 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:44:40,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:44:40,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:44:40,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:44:40,384 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:44:40,385 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:44:40,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapsum4.i [2020-12-23 00:44:40,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d9b020c31/650ab511a0f94c049cf055683f0b1a19/FLAG418a2e1b3 [2020-12-23 00:44:41,184 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:44:41,186 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum4.i [2020-12-23 00:44:41,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d9b020c31/650ab511a0f94c049cf055683f0b1a19/FLAG418a2e1b3 [2020-12-23 00:44:41,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d9b020c31/650ab511a0f94c049cf055683f0b1a19 [2020-12-23 00:44:41,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:44:41,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:44:41,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:44:41,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:44:41,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:44:41,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:44:41" (1/1) ... [2020-12-23 00:44:41,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd70ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:41, skipping insertion in model container [2020-12-23 00:44:41,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:44:41" (1/1) ... [2020-12-23 00:44:41,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:44:41,562 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[99999]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:44:41,745 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-crafted/mapsum4.i[1318,1331] [2020-12-23 00:44:41,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:44:41,761 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[399996],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:44:41,786 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-crafted/mapsum4.i[1318,1331] [2020-12-23 00:44:41,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:44:41,804 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:44:41,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:41 WrapperNode [2020-12-23 00:44:41,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:44:41,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:44:41,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:44:41,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:44:41,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:41" (1/1) ... [2020-12-23 00:44:41,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:41" (1/1) ... [2020-12-23 00:44:41,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:44:41,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:44:41,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:44:41,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:44:41,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:41" (1/1) ... [2020-12-23 00:44:41,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:41" (1/1) ... [2020-12-23 00:44:41,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:41" (1/1) ... [2020-12-23 00:44:41,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:41" (1/1) ... [2020-12-23 00:44:41,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:41" (1/1) ... [2020-12-23 00:44:41,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:41" (1/1) ... [2020-12-23 00:44:41,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:41" (1/1) ... [2020-12-23 00:44:41,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:44:41,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:44:41,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:44:41,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:44:41,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:44:41,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:44:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:44:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:44:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:44:41,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:44:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:44:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:44:42,399 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:44:42,400 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 00:44:42,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:44:42 BoogieIcfgContainer [2020-12-23 00:44:42,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:44:42,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:44:42,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:44:42,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:44:42,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:44:41" (1/3) ... [2020-12-23 00:44:42,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa64ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:44:42, skipping insertion in model container [2020-12-23 00:44:42,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:41" (2/3) ... [2020-12-23 00:44:42,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa64ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:44:42, skipping insertion in model container [2020-12-23 00:44:42,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:44:42" (3/3) ... [2020-12-23 00:44:42,425 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum4.i [2020-12-23 00:44:42,456 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:44:42,461 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:44:42,498 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:44:42,546 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:44:42,548 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:44:42,548 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:44:42,549 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:44:42,549 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:44:42,549 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:44:42,549 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:44:42,550 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:44:42,575 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-23 00:44:42,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:44:42,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:42,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:42,584 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:42,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2020-12-23 00:44:42,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:42,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928754191] [2020-12-23 00:44:42,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:44:42,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928754191] [2020-12-23 00:44:42,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:44:42,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:44:42,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846046125] [2020-12-23 00:44:42,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:44:42,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:42,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:44:42,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:44:42,971 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-12-23 00:44:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:43,053 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2020-12-23 00:44:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:44:43,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:44:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:43,077 INFO L225 Difference]: With dead ends: 52 [2020-12-23 00:44:43,078 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 00:44:43,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:44:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 00:44:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-23 00:44:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:44:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-23 00:44:43,130 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-12-23 00:44:43,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:43,131 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-23 00:44:43,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:44:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-23 00:44:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:44:43,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:43,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:43,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:44:43,135 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:43,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:43,139 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2020-12-23 00:44:43,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:43,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488112997] [2020-12-23 00:44:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:44:43,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488112997] [2020-12-23 00:44:43,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571206205] [2020-12-23 00:44:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:43,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:44:43,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:44:43,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:44:43,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:44:43,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92218196] [2020-12-23 00:44:43,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:44:43,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:43,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:44:43,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:43,401 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2020-12-23 00:44:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:43,447 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-23 00:44:43,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:44:43,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:44:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:43,450 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:44:43,451 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 00:44:43,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 00:44:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-12-23 00:44:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:44:43,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-23 00:44:43,469 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-12-23 00:44:43,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:43,470 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-23 00:44:43,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:44:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-23 00:44:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:44:43,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:43,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:43,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:44:43,680 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:43,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:43,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2020-12-23 00:44:43,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:43,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706997120] [2020-12-23 00:44:43,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:44:43,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706997120] [2020-12-23 00:44:43,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337102437] [2020-12-23 00:44:43,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:43,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:44:43,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:44:43,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:44:43,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:44:43,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567045242] [2020-12-23 00:44:43,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:44:43,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:43,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:44:43,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:43,907 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2020-12-23 00:44:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:43,921 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-23 00:44:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:44:43,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-23 00:44:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:43,923 INFO L225 Difference]: With dead ends: 38 [2020-12-23 00:44:43,923 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:44:43,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:44:43,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-23 00:44:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:44:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-23 00:44:43,930 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2020-12-23 00:44:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:43,930 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-23 00:44:43,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:44:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-23 00:44:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:44:43,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:43,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:44,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:44,146 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:44,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:44,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2020-12-23 00:44:44,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:44,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519961816] [2020-12-23 00:44:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:44:44,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519961816] [2020-12-23 00:44:44,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268076678] [2020-12-23 00:44:44,205 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 [2020-12-23 00:44:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:44,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:44:44,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:44:44,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:44,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:44:44,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808070401] [2020-12-23 00:44:44,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:44:44,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:44,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:44:44,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:44,429 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-12-23 00:44:44,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:44,469 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-12-23 00:44:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:44:44,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-23 00:44:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:44,473 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:44:44,474 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:44:44,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:44,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:44:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 00:44:44,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:44:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-23 00:44:44,485 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2020-12-23 00:44:44,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:44,485 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-23 00:44:44,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:44:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-23 00:44:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:44:44,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:44,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:44,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:44,704 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:44,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:44,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2020-12-23 00:44:44,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:44,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661414031] [2020-12-23 00:44:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:44:44,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661414031] [2020-12-23 00:44:44,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115609561] [2020-12-23 00:44:44,757 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 [2020-12-23 00:44:44,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:44,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:44,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:44:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:44:44,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:44,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:44:44,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306405537] [2020-12-23 00:44:44,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:44:44,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:44,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:44:44,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:44:44,895 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-12-23 00:44:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:44,969 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-12-23 00:44:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:44:44,970 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-12-23 00:44:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:44,971 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:44:44,971 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 00:44:44,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:44:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 00:44:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-12-23 00:44:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:44:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-23 00:44:44,978 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2020-12-23 00:44:44,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:44,978 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-23 00:44:44,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:44:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-23 00:44:44,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 00:44:44,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:44,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:45,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:45,193 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:45,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:45,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2020-12-23 00:44:45,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:45,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087097378] [2020-12-23 00:44:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 00:44:45,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087097378] [2020-12-23 00:44:45,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703433484] [2020-12-23 00:44:45,264 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 [2020-12-23 00:44:45,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:44:45,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:45,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:44:45,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 00:44:45,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:45,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 00:44:45,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102294301] [2020-12-23 00:44:45,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:44:45,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:45,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:44:45,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:44:45,392 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-12-23 00:44:45,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:45,470 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-12-23 00:44:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:44:45,470 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-12-23 00:44:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:45,471 INFO L225 Difference]: With dead ends: 81 [2020-12-23 00:44:45,471 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 00:44:45,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:44:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 00:44:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-12-23 00:44:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:44:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-12-23 00:44:45,479 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2020-12-23 00:44:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:45,479 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-12-23 00:44:45,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:44:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-12-23 00:44:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:44:45,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:45,481 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:45,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:44:45,696 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:45,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:45,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1892525292, now seen corresponding path program 4 times [2020-12-23 00:44:45,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:45,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465887554] [2020-12-23 00:44:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:44:45,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465887554] [2020-12-23 00:44:45,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152599476] [2020-12-23 00:44:45,848 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 [2020-12-23 00:44:45,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:45,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:45,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:44:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:44:45,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:45,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:44:45,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393118086] [2020-12-23 00:44:45,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:44:45,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:45,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:44:45,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:44:45,966 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2020-12-23 00:44:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:45,987 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-12-23 00:44:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:44:45,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-12-23 00:44:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:45,989 INFO L225 Difference]: With dead ends: 86 [2020-12-23 00:44:45,989 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:44:45,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:44:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:44:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 00:44:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:44:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-12-23 00:44:45,995 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2020-12-23 00:44:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:45,996 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-12-23 00:44:45,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:44:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-12-23 00:44:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:44:45,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:45,997 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:46,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:46,212 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash 704135506, now seen corresponding path program 5 times [2020-12-23 00:44:46,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:46,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785537123] [2020-12-23 00:44:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:44:46,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785537123] [2020-12-23 00:44:46,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350934254] [2020-12-23 00:44:46,290 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 [2020-12-23 00:44:46,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:44:46,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:46,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:44:46,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 00:44:46,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:46,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-23 00:44:46,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909051888] [2020-12-23 00:44:46,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:44:46,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:46,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:44:46,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:46,499 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2020-12-23 00:44:46,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:46,606 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2020-12-23 00:44:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:44:46,607 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-12-23 00:44:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:46,607 INFO L225 Difference]: With dead ends: 97 [2020-12-23 00:44:46,608 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:44:46,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:44:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-12-23 00:44:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:44:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-23 00:44:46,615 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2020-12-23 00:44:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:46,615 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-23 00:44:46,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:44:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-23 00:44:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:44:46,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:46,616 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:46,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:46,827 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:46,830 INFO L82 PathProgramCache]: Analyzing trace with hash -788382450, now seen corresponding path program 6 times [2020-12-23 00:44:46,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:46,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694824931] [2020-12-23 00:44:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-23 00:44:46,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694824931] [2020-12-23 00:44:46,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515246957] [2020-12-23 00:44:46,923 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 [2020-12-23 00:44:47,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:44:47,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:44:47,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:47,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:47,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-23 00:44:47,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60055456] [2020-12-23 00:44:47,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:44:47,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:47,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:44:47,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:47,254 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 11 states. [2020-12-23 00:44:47,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:47,312 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2020-12-23 00:44:47,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:44:47,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-12-23 00:44:47,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:47,314 INFO L225 Difference]: With dead ends: 105 [2020-12-23 00:44:47,314 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 00:44:47,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 00:44:47,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-12-23 00:44:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 00:44:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-12-23 00:44:47,322 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2020-12-23 00:44:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:47,322 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-12-23 00:44:47,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:44:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-12-23 00:44:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:44:47,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:47,324 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:47,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:44:47,533 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:47,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:47,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1118484150, now seen corresponding path program 7 times [2020-12-23 00:44:47,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:47,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249752719] [2020-12-23 00:44:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:47,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249752719] [2020-12-23 00:44:47,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298697063] [2020-12-23 00:44:47,651 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 [2020-12-23 00:44:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:47,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:44:47,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:47,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:47,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:44:47,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295828766] [2020-12-23 00:44:47,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:44:47,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:47,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:44:47,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:44:47,819 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 10 states. [2020-12-23 00:44:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:47,854 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-12-23 00:44:47,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:44:47,854 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-12-23 00:44:47,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:47,855 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:44:47,855 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 00:44:47,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:44:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 00:44:47,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-23 00:44:47,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 00:44:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-12-23 00:44:47,863 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2020-12-23 00:44:47,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:47,863 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-12-23 00:44:47,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:44:47,864 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-12-23 00:44:47,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:44:47,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:47,865 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:48,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:48,080 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:48,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 8 times [2020-12-23 00:44:48,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:48,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336884231] [2020-12-23 00:44:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:48,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336884231] [2020-12-23 00:44:48,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146783900] [2020-12-23 00:44:48,229 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 [2020-12-23 00:44:48,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:48,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:44:48,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:48,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:48,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:44:48,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254943376] [2020-12-23 00:44:48,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:44:48,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:48,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:44:48,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:48,447 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2020-12-23 00:44:48,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:48,481 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-12-23 00:44:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:44:48,482 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-12-23 00:44:48,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:48,483 INFO L225 Difference]: With dead ends: 110 [2020-12-23 00:44:48,483 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 00:44:48,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:48,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 00:44:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-23 00:44:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:44:48,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-12-23 00:44:48,490 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2020-12-23 00:44:48,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:48,490 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-12-23 00:44:48,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:44:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-12-23 00:44:48,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:44:48,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:48,492 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:48,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:48,707 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:48,708 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 9 times [2020-12-23 00:44:48,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:48,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614815271] [2020-12-23 00:44:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:48,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614815271] [2020-12-23 00:44:48,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497969802] [2020-12-23 00:44:48,832 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 [2020-12-23 00:44:48,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:44:48,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:48,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:44:48,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-23 00:44:49,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:49,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-12-23 00:44:49,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257096222] [2020-12-23 00:44:49,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:44:49,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:49,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:44:49,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:44:49,056 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 15 states. [2020-12-23 00:44:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:49,129 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-12-23 00:44:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:44:49,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-12-23 00:44:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:49,130 INFO L225 Difference]: With dead ends: 115 [2020-12-23 00:44:49,130 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 00:44:49,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:44:49,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 00:44:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-12-23 00:44:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 00:44:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-12-23 00:44:49,137 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 63 [2020-12-23 00:44:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:49,137 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-12-23 00:44:49,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:44:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-12-23 00:44:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 00:44:49,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:49,139 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:49,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 00:44:49,354 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:49,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:49,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1743137406, now seen corresponding path program 10 times [2020-12-23 00:44:49,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:49,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339145893] [2020-12-23 00:44:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:49,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339145893] [2020-12-23 00:44:49,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174011151] [2020-12-23 00:44:49,543 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 [2020-12-23 00:44:49,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:49,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:44:49,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:49,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:49,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:44:49,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352028160] [2020-12-23 00:44:49,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:44:49,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:49,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:44:49,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:44:49,760 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 13 states. [2020-12-23 00:44:49,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:49,811 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-12-23 00:44:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:44:49,812 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-12-23 00:44:49,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:49,813 INFO L225 Difference]: With dead ends: 118 [2020-12-23 00:44:49,813 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 00:44:49,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:44:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 00:44:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-23 00:44:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 00:44:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-12-23 00:44:49,819 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2020-12-23 00:44:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:49,820 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-12-23 00:44:49,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:44:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-12-23 00:44:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:44:49,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:49,821 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:50,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:44:50,037 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:50,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:50,038 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 11 times [2020-12-23 00:44:50,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:50,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412444103] [2020-12-23 00:44:50,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:50,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412444103] [2020-12-23 00:44:50,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156635948] [2020-12-23 00:44:50,177 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 [2020-12-23 00:44:50,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:44:50,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:50,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:44:50,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:50,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:50,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:44:50,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360980696] [2020-12-23 00:44:50,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:44:50,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:50,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:44:50,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:44:50,558 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2020-12-23 00:44:50,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:50,605 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-12-23 00:44:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:44:50,606 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-12-23 00:44:50,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:50,607 INFO L225 Difference]: With dead ends: 120 [2020-12-23 00:44:50,607 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 00:44:50,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:44:50,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 00:44:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-23 00:44:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 00:44:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-12-23 00:44:50,613 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2020-12-23 00:44:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:50,613 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-12-23 00:44:50,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:44:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-12-23 00:44:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:44:50,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:50,615 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:50,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:44:50,830 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:50,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:50,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 12 times [2020-12-23 00:44:50,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:50,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495233102] [2020-12-23 00:44:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:51,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495233102] [2020-12-23 00:44:51,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867309075] [2020-12-23 00:44:51,013 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 [2020-12-23 00:44:51,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:44:51,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:51,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:44:51,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 00:44:51,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:51,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2020-12-23 00:44:51,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205079707] [2020-12-23 00:44:51,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:44:51,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:51,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:44:51,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:51,531 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2020-12-23 00:44:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:51,646 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2020-12-23 00:44:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:44:51,647 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2020-12-23 00:44:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:51,648 INFO L225 Difference]: With dead ends: 125 [2020-12-23 00:44:51,648 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 00:44:51,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 00:44:51,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-12-23 00:44:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:44:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-12-23 00:44:51,653 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2020-12-23 00:44:51,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:51,654 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-12-23 00:44:51,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:44:51,654 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-12-23 00:44:51,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:44:51,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:51,655 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:51,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:51,869 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:51,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:51,870 INFO L82 PathProgramCache]: Analyzing trace with hash 970283450, now seen corresponding path program 13 times [2020-12-23 00:44:51,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:51,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088959643] [2020-12-23 00:44:51,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:52,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088959643] [2020-12-23 00:44:52,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470566528] [2020-12-23 00:44:52,085 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 [2020-12-23 00:44:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:52,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:44:52,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:52,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:52,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:44:52,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702510205] [2020-12-23 00:44:52,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:44:52,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:52,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:44:52,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:44:52,272 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 16 states. [2020-12-23 00:44:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:52,365 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-12-23 00:44:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:44:52,366 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-12-23 00:44:52,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:52,367 INFO L225 Difference]: With dead ends: 128 [2020-12-23 00:44:52,367 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 00:44:52,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:44:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 00:44:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-12-23 00:44:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 00:44:52,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-12-23 00:44:52,377 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2020-12-23 00:44:52,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:52,377 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-12-23 00:44:52,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:44:52,378 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-12-23 00:44:52,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:44:52,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:52,378 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:52,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:44:52,592 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:52,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 14 times [2020-12-23 00:44:52,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:52,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849080490] [2020-12-23 00:44:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:52,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849080490] [2020-12-23 00:44:52,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517496578] [2020-12-23 00:44:52,794 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 [2020-12-23 00:44:52,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:52,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:52,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:44:52,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:52,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:52,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:44:52,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50740630] [2020-12-23 00:44:52,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:44:52,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:52,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:44:52,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:44:52,978 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2020-12-23 00:44:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:53,035 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-12-23 00:44:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:44:53,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-12-23 00:44:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:53,037 INFO L225 Difference]: With dead ends: 130 [2020-12-23 00:44:53,037 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 00:44:53,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:44:53,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 00:44:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-23 00:44:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 00:44:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-12-23 00:44:53,042 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2020-12-23 00:44:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:53,042 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-12-23 00:44:53,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:44:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-12-23 00:44:53,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 00:44:53,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:53,043 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:53,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:44:53,257 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:53,258 INFO L82 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 15 times [2020-12-23 00:44:53,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:53,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397614161] [2020-12-23 00:44:53,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:53,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397614161] [2020-12-23 00:44:53,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639495203] [2020-12-23 00:44:53,481 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 [2020-12-23 00:44:53,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:44:53,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:53,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:44:53,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-23 00:44:53,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:53,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2020-12-23 00:44:53,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534107106] [2020-12-23 00:44:53,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:44:53,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:53,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:44:53,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:53,760 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 22 states. [2020-12-23 00:44:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:53,955 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2020-12-23 00:44:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:44:53,956 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 79 [2020-12-23 00:44:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:53,957 INFO L225 Difference]: With dead ends: 141 [2020-12-23 00:44:53,957 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 00:44:53,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 00:44:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-12-23 00:44:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 00:44:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-12-23 00:44:53,962 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2020-12-23 00:44:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:53,963 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-12-23 00:44:53,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:44:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-12-23 00:44:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 00:44:53,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:53,964 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:54,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:44:54,179 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:54,180 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 16 times [2020-12-23 00:44:54,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:54,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217899504] [2020-12-23 00:44:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:54,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217899504] [2020-12-23 00:44:54,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527657306] [2020-12-23 00:44:54,409 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 [2020-12-23 00:44:54,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:54,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:54,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:44:54,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:54,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:54,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:44:54,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166414884] [2020-12-23 00:44:54,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:44:54,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:54,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:44:54,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:54,659 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 19 states. [2020-12-23 00:44:54,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:54,729 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2020-12-23 00:44:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:44:54,729 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2020-12-23 00:44:54,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:54,730 INFO L225 Difference]: With dead ends: 146 [2020-12-23 00:44:54,730 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 00:44:54,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:54,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 00:44:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-12-23 00:44:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:44:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-12-23 00:44:54,736 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2020-12-23 00:44:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:54,736 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-12-23 00:44:54,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:44:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-12-23 00:44:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:44:54,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:54,737 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:54,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:54,951 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:54,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:54,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2002949072, now seen corresponding path program 17 times [2020-12-23 00:44:54,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:54,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319314230] [2020-12-23 00:44:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:55,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319314230] [2020-12-23 00:44:55,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838365560] [2020-12-23 00:44:55,236 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 [2020-12-23 00:44:56,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 00:44:56,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:56,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:44:56,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:56,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:56,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:44:56,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164848732] [2020-12-23 00:44:56,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:44:56,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:56,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:44:56,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:44:56,223 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 20 states. [2020-12-23 00:44:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:56,298 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2020-12-23 00:44:56,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:44:56,298 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-12-23 00:44:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:56,299 INFO L225 Difference]: With dead ends: 148 [2020-12-23 00:44:56,299 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:44:56,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:44:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:44:56,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 00:44:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:44:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-12-23 00:44:56,304 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2020-12-23 00:44:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:56,304 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-12-23 00:44:56,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:44:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-12-23 00:44:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 00:44:56,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:56,305 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:56,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:56,521 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:56,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:56,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 18 times [2020-12-23 00:44:56,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:56,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255789257] [2020-12-23 00:44:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:56,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255789257] [2020-12-23 00:44:56,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110581884] [2020-12-23 00:44:56,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:57,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 00:44:57,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:57,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:44:57,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-12-23 00:44:57,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:57,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-12-23 00:44:57,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464002554] [2020-12-23 00:44:57,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:44:57,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:57,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:44:57,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:44:57,704 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 26 states. [2020-12-23 00:44:57,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:57,878 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-12-23 00:44:57,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:44:57,879 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2020-12-23 00:44:57,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:57,879 INFO L225 Difference]: With dead ends: 159 [2020-12-23 00:44:57,880 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:44:57,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:44:57,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:44:57,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-12-23 00:44:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 00:44:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-12-23 00:44:57,884 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2020-12-23 00:44:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:57,885 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-12-23 00:44:57,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:44:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-12-23 00:44:57,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 00:44:57,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:57,886 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:58,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:44:58,090 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:58,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:58,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1310358570, now seen corresponding path program 19 times [2020-12-23 00:44:58,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:58,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432451185] [2020-12-23 00:44:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:58,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432451185] [2020-12-23 00:44:58,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030173888] [2020-12-23 00:44:58,397 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 [2020-12-23 00:44:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:58,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:44:58,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:58,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:58,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 00:44:58,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563354242] [2020-12-23 00:44:58,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:44:58,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:44:58,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:58,657 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 22 states. [2020-12-23 00:44:58,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:58,736 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2020-12-23 00:44:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:44:58,736 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2020-12-23 00:44:58,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:58,737 INFO L225 Difference]: With dead ends: 164 [2020-12-23 00:44:58,738 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 00:44:58,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 00:44:58,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-12-23 00:44:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 00:44:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-12-23 00:44:58,742 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2020-12-23 00:44:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:58,742 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-12-23 00:44:58,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:44:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-12-23 00:44:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:44:58,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:58,744 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:58,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:44:58,958 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:58,959 INFO L82 PathProgramCache]: Analyzing trace with hash -903575576, now seen corresponding path program 20 times [2020-12-23 00:44:58,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:58,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153510044] [2020-12-23 00:44:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:59,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153510044] [2020-12-23 00:44:59,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622774762] [2020-12-23 00:44:59,308 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 [2020-12-23 00:44:59,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:59,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:59,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:44:59,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:59,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:59,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:44:59,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665785571] [2020-12-23 00:44:59,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:44:59,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:59,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:44:59,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:44:59,544 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 23 states. [2020-12-23 00:44:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:59,615 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2020-12-23 00:44:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:44:59,616 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2020-12-23 00:44:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:59,616 INFO L225 Difference]: With dead ends: 166 [2020-12-23 00:44:59,617 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 00:44:59,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:44:59,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 00:44:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-12-23 00:44:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 00:44:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-12-23 00:44:59,621 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2020-12-23 00:44:59,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:59,622 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-12-23 00:44:59,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:44:59,622 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-12-23 00:44:59,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 00:44:59,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:59,623 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:59,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:59,839 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:59,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1809488934, now seen corresponding path program 21 times [2020-12-23 00:44:59,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:59,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127723854] [2020-12-23 00:44:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:45:00,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127723854] [2020-12-23 00:45:00,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693388458] [2020-12-23 00:45:00,181 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 [2020-12-23 00:45:00,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:45:00,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:00,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:45:00,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-12-23 00:45:00,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:00,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2020-12-23 00:45:00,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770305853] [2020-12-23 00:45:00,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:45:00,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:00,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:45:00,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:45:00,695 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 29 states. [2020-12-23 00:45:00,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:00,827 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2020-12-23 00:45:00,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:45:00,828 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 103 [2020-12-23 00:45:00,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:00,829 INFO L225 Difference]: With dead ends: 171 [2020-12-23 00:45:00,829 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 00:45:00,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:45:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 00:45:00,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-12-23 00:45:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 00:45:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-12-23 00:45:00,834 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2020-12-23 00:45:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:00,835 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-12-23 00:45:00,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:45:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-12-23 00:45:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 00:45:00,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:00,836 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:01,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 00:45:01,050 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:01,051 INFO L82 PathProgramCache]: Analyzing trace with hash 676687458, now seen corresponding path program 22 times [2020-12-23 00:45:01,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:01,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102931178] [2020-12-23 00:45:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:45:01,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102931178] [2020-12-23 00:45:01,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348640179] [2020-12-23 00:45:01,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:01,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:45:01,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:01,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:45:01,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2020-12-23 00:45:01,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:01,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 31 [2020-12-23 00:45:01,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824622496] [2020-12-23 00:45:01,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:45:01,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:01,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:45:01,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:45:01,795 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 31 states. [2020-12-23 00:45:01,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:01,936 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2020-12-23 00:45:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 00:45:01,937 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 107 [2020-12-23 00:45:01,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:01,938 INFO L225 Difference]: With dead ends: 177 [2020-12-23 00:45:01,938 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 00:45:01,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:45:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 00:45:01,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-12-23 00:45:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 00:45:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-12-23 00:45:01,943 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2020-12-23 00:45:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:01,943 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-12-23 00:45:01,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:45:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-12-23 00:45:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 00:45:01,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:01,944 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:02,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:02,160 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:02,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:02,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1973169506, now seen corresponding path program 23 times [2020-12-23 00:45:02,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:02,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417225431] [2020-12-23 00:45:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-12-23 00:45:02,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417225431] [2020-12-23 00:45:02,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255691214] [2020-12-23 00:45:02,551 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 [2020-12-23 00:45:04,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-23 00:45:04,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:04,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:45:04,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-23 00:45:04,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:04,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2020-12-23 00:45:04,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417357547] [2020-12-23 00:45:04,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:45:04,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:04,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:45:04,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:45:04,913 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 32 states. [2020-12-23 00:45:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:05,162 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2020-12-23 00:45:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:45:05,163 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 111 [2020-12-23 00:45:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:05,163 INFO L225 Difference]: With dead ends: 189 [2020-12-23 00:45:05,164 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 00:45:05,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:45:05,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 00:45:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-12-23 00:45:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:45:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-12-23 00:45:05,169 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 111 [2020-12-23 00:45:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:05,170 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-12-23 00:45:05,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:45:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-12-23 00:45:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 00:45:05,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:05,171 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:05,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:45:05,387 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:05,387 INFO L82 PathProgramCache]: Analyzing trace with hash 41685082, now seen corresponding path program 24 times [2020-12-23 00:45:05,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:05,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207342853] [2020-12-23 00:45:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 00:45:05,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207342853] [2020-12-23 00:45:05,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676599257] [2020-12-23 00:45:05,833 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 [2020-12-23 00:45:08,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 00:45:08,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:08,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:45:08,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-23 00:45:08,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:08,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2020-12-23 00:45:08,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986005412] [2020-12-23 00:45:08,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:45:08,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:08,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:45:08,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:45:08,443 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 34 states. [2020-12-23 00:45:08,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:08,674 INFO L93 Difference]: Finished difference Result 203 states and 214 transitions. [2020-12-23 00:45:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:45:08,675 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 119 [2020-12-23 00:45:08,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:08,676 INFO L225 Difference]: With dead ends: 203 [2020-12-23 00:45:08,676 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 00:45:08,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:45:08,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 00:45:08,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2020-12-23 00:45:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 00:45:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-12-23 00:45:08,681 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2020-12-23 00:45:08,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:08,682 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-12-23 00:45:08,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:45:08,682 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-12-23 00:45:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 00:45:08,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:08,683 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:08,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:45:08,898 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:08,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 25 times [2020-12-23 00:45:08,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:08,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868000280] [2020-12-23 00:45:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:45:09,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868000280] [2020-12-23 00:45:09,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824294393] [2020-12-23 00:45:09,355 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 [2020-12-23 00:45:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:09,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:45:09,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:45:09,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:09,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 00:45:09,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686852827] [2020-12-23 00:45:09,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:45:09,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:09,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:45:09,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:45:09,653 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2020-12-23 00:45:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:09,754 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2020-12-23 00:45:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:45:09,754 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2020-12-23 00:45:09,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:09,755 INFO L225 Difference]: With dead ends: 208 [2020-12-23 00:45:09,756 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 00:45:09,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:45:09,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 00:45:09,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-12-23 00:45:09,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 00:45:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-12-23 00:45:09,763 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2020-12-23 00:45:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:09,764 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-12-23 00:45:09,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:45:09,764 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-12-23 00:45:09,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-23 00:45:09,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:09,765 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:09,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:45:09,980 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:09,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:09,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 26 times [2020-12-23 00:45:09,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:09,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745243866] [2020-12-23 00:45:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:45:10,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745243866] [2020-12-23 00:45:10,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993830069] [2020-12-23 00:45:10,515 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 [2020-12-23 00:45:10,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:45:10,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:10,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:45:10,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:45:10,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:10,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 00:45:10,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010977391] [2020-12-23 00:45:10,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:45:10,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:10,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:45:10,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:45:10,787 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 29 states. [2020-12-23 00:45:10,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:10,900 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2020-12-23 00:45:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:45:10,900 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2020-12-23 00:45:10,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:10,901 INFO L225 Difference]: With dead ends: 210 [2020-12-23 00:45:10,901 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 00:45:10,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:45:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 00:45:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-12-23 00:45:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 00:45:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2020-12-23 00:45:10,907 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2020-12-23 00:45:10,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:10,907 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2020-12-23 00:45:10,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:45:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2020-12-23 00:45:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 00:45:10,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:10,909 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:11,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:45:11,124 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:11,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1805967086, now seen corresponding path program 27 times [2020-12-23 00:45:11,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:11,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797237366] [2020-12-23 00:45:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:45:11,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797237366] [2020-12-23 00:45:11,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086911127] [2020-12-23 00:45:11,644 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 [2020-12-23 00:45:12,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:45:12,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:12,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:45:12,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2020-12-23 00:45:12,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:12,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2020-12-23 00:45:12,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276913362] [2020-12-23 00:45:12,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:45:12,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:12,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:45:12,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:45:12,326 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 37 states. [2020-12-23 00:45:12,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:12,517 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2020-12-23 00:45:12,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:45:12,518 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 131 [2020-12-23 00:45:12,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:12,519 INFO L225 Difference]: With dead ends: 215 [2020-12-23 00:45:12,519 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 00:45:12,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:45:12,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 00:45:12,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-12-23 00:45:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 00:45:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2020-12-23 00:45:12,525 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 131 [2020-12-23 00:45:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:12,525 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2020-12-23 00:45:12,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:45:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2020-12-23 00:45:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 00:45:12,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:12,527 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:12,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:12,740 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:12,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:12,741 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 28 times [2020-12-23 00:45:12,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:12,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110146839] [2020-12-23 00:45:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:45:13,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110146839] [2020-12-23 00:45:13,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513976948] [2020-12-23 00:45:13,366 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 [2020-12-23 00:45:13,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:45:13,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:13,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:45:13,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:45:13,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:13,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 00:45:13,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879606571] [2020-12-23 00:45:13,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:45:13,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:13,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:45:13,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:45:13,659 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 31 states. [2020-12-23 00:45:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:13,770 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2020-12-23 00:45:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:45:13,770 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 135 [2020-12-23 00:45:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:13,771 INFO L225 Difference]: With dead ends: 218 [2020-12-23 00:45:13,771 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 00:45:13,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:45:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 00:45:13,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-12-23 00:45:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 00:45:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-12-23 00:45:13,777 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2020-12-23 00:45:13,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:13,777 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-12-23 00:45:13,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:45:13,778 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-12-23 00:45:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-23 00:45:13,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:13,778 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:13,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:13,992 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:13,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1428315124, now seen corresponding path program 29 times [2020-12-23 00:45:13,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:13,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864026147] [2020-12-23 00:45:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:45:14,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864026147] [2020-12-23 00:45:14,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042189747] [2020-12-23 00:45:14,612 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 [2020-12-23 00:45:16,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-23 00:45:16,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:16,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:45:16,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2020-12-23 00:45:16,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:16,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2020-12-23 00:45:16,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816400640] [2020-12-23 00:45:16,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:45:16,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:45:16,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:45:16,443 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 40 states. [2020-12-23 00:45:16,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:16,674 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2020-12-23 00:45:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:45:16,675 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 137 [2020-12-23 00:45:16,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:16,676 INFO L225 Difference]: With dead ends: 223 [2020-12-23 00:45:16,676 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 00:45:16,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:45:16,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 00:45:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-12-23 00:45:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 00:45:16,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-12-23 00:45:16,690 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 137 [2020-12-23 00:45:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:16,690 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-12-23 00:45:16,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:45:16,691 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-12-23 00:45:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-23 00:45:16,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:16,692 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:16,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:16,904 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:16,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1798907208, now seen corresponding path program 30 times [2020-12-23 00:45:16,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:16,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291279969] [2020-12-23 00:45:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-12-23 00:45:17,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291279969] [2020-12-23 00:45:17,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448571693] [2020-12-23 00:45:17,534 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 [2020-12-23 00:45:20,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 00:45:20,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:20,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:45:20,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2020-12-23 00:45:21,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:21,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 41 [2020-12-23 00:45:21,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176677353] [2020-12-23 00:45:21,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:45:21,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:21,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:45:21,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:45:21,199 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 41 states. [2020-12-23 00:45:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:21,595 INFO L93 Difference]: Finished difference Result 235 states and 246 transitions. [2020-12-23 00:45:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 00:45:21,596 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 141 [2020-12-23 00:45:21,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:21,597 INFO L225 Difference]: With dead ends: 235 [2020-12-23 00:45:21,597 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 00:45:21,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:45:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 00:45:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-12-23 00:45:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 00:45:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2020-12-23 00:45:21,603 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 141 [2020-12-23 00:45:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:21,604 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2020-12-23 00:45:21,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:45:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2020-12-23 00:45:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-23 00:45:21,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:21,605 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:21,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:45:21,819 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:21,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:21,820 INFO L82 PathProgramCache]: Analyzing trace with hash 308754692, now seen corresponding path program 31 times [2020-12-23 00:45:21,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:21,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918806756] [2020-12-23 00:45:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:45:22,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918806756] [2020-12-23 00:45:22,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710552503] [2020-12-23 00:45:22,466 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 [2020-12-23 00:45:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:22,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 00:45:22,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:45:22,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:22,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 00:45:22,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582780108] [2020-12-23 00:45:22,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:45:22,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:22,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:45:22,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:45:22,770 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 34 states. [2020-12-23 00:45:22,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:22,882 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2020-12-23 00:45:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:45:22,883 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2020-12-23 00:45:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:22,884 INFO L225 Difference]: With dead ends: 240 [2020-12-23 00:45:22,884 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 00:45:22,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:45:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 00:45:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-12-23 00:45:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 00:45:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-12-23 00:45:22,890 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2020-12-23 00:45:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:22,891 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-12-23 00:45:22,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:45:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-12-23 00:45:22,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-23 00:45:22,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:22,892 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:23,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:23,106 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash -747071166, now seen corresponding path program 32 times [2020-12-23 00:45:23,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:23,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174254932] [2020-12-23 00:45:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:45:23,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174254932] [2020-12-23 00:45:23,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44439617] [2020-12-23 00:45:23,844 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 [2020-12-23 00:45:23,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:45:23,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:23,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:45:23,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:45:24,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:24,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 00:45:24,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724954832] [2020-12-23 00:45:24,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:45:24,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:24,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:45:24,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:45:24,165 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 35 states. [2020-12-23 00:45:24,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:24,311 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2020-12-23 00:45:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:45:24,311 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 151 [2020-12-23 00:45:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:24,312 INFO L225 Difference]: With dead ends: 242 [2020-12-23 00:45:24,312 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 00:45:24,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:45:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 00:45:24,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-12-23 00:45:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 00:45:24,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2020-12-23 00:45:24,319 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2020-12-23 00:45:24,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:24,319 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2020-12-23 00:45:24,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:45:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2020-12-23 00:45:24,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-23 00:45:24,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:24,320 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:24,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:45:24,534 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:24,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:24,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1783438848, now seen corresponding path program 33 times [2020-12-23 00:45:24,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:24,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764465769] [2020-12-23 00:45:24,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:45:25,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764465769] [2020-12-23 00:45:25,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629039416] [2020-12-23 00:45:25,339 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 [2020-12-23 00:45:25,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:45:25,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:25,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:45:25,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2020-12-23 00:45:26,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:26,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 12] total 45 [2020-12-23 00:45:26,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908231862] [2020-12-23 00:45:26,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:45:26,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:26,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:45:26,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:45:26,459 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 45 states. [2020-12-23 00:45:26,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:26,865 INFO L93 Difference]: Finished difference Result 253 states and 264 transitions. [2020-12-23 00:45:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 00:45:26,866 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 153 [2020-12-23 00:45:26,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:26,869 INFO L225 Difference]: With dead ends: 253 [2020-12-23 00:45:26,869 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 00:45:26,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:45:26,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 00:45:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-12-23 00:45:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 00:45:26,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2020-12-23 00:45:26,878 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 153 [2020-12-23 00:45:26,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:26,879 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2020-12-23 00:45:26,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:45:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2020-12-23 00:45:26,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-23 00:45:26,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:26,880 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:27,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:27,095 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:27,095 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 34 times [2020-12-23 00:45:27,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:27,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125412303] [2020-12-23 00:45:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-12-23 00:45:27,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125412303] [2020-12-23 00:45:27,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160419774] [2020-12-23 00:45:27,899 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 [2020-12-23 00:45:28,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:45:28,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:45:28,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2020-12-23 00:45:28,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:28,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2020-12-23 00:45:28,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255748240] [2020-12-23 00:45:28,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 00:45:28,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:28,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 00:45:28,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:45:28,548 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 47 states. [2020-12-23 00:45:28,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:28,865 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2020-12-23 00:45:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 00:45:28,866 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 161 [2020-12-23 00:45:28,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:28,867 INFO L225 Difference]: With dead ends: 267 [2020-12-23 00:45:28,867 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 00:45:28,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:45:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 00:45:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2020-12-23 00:45:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 00:45:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2020-12-23 00:45:28,874 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 161 [2020-12-23 00:45:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:28,874 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2020-12-23 00:45:28,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 00:45:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2020-12-23 00:45:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-23 00:45:28,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:28,875 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:29,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:45:29,090 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:29,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:29,091 INFO L82 PathProgramCache]: Analyzing trace with hash -628416392, now seen corresponding path program 35 times [2020-12-23 00:45:29,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:29,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059921964] [2020-12-23 00:45:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2020-12-23 00:45:30,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059921964] [2020-12-23 00:45:30,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71132018] [2020-12-23 00:45:30,044 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 [2020-12-23 00:46:45,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-23 00:46:45,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:45,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:46:45,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2020-12-23 00:46:45,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:45,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2020-12-23 00:46:45,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780775855] [2020-12-23 00:46:45,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 00:46:45,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:45,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 00:46:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:46:45,866 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 49 states. [2020-12-23 00:46:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:46,311 INFO L93 Difference]: Finished difference Result 281 states and 292 transitions. [2020-12-23 00:46:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 00:46:46,312 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 169 [2020-12-23 00:46:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:46,314 INFO L225 Difference]: With dead ends: 281 [2020-12-23 00:46:46,314 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 00:46:46,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:46:46,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 00:46:46,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2020-12-23 00:46:46,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 00:46:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2020-12-23 00:46:46,322 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 169 [2020-12-23 00:46:46,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:46,322 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2020-12-23 00:46:46,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 00:46:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2020-12-23 00:46:46,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-23 00:46:46,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:46,324 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 12, 12, 12, 12, 12, 12, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:46,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:46:46,539 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:46,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:46,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1809286964, now seen corresponding path program 36 times [2020-12-23 00:46:46,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:46,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439695830] [2020-12-23 00:46:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2020-12-23 00:46:47,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439695830] [2020-12-23 00:46:47,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412275136] [2020-12-23 00:46:47,392 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 [2020-12-23 00:46:55,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 00:46:55,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:55,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:46:55,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1657 trivial. 0 not checked. [2020-12-23 00:46:56,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:56,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 12] total 48 [2020-12-23 00:46:56,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364816738] [2020-12-23 00:46:56,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 00:46:56,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:56,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 00:46:56,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:46:56,254 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 48 states. [2020-12-23 00:46:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:56,519 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2020-12-23 00:46:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 00:46:56,520 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 177 [2020-12-23 00:46:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:56,521 INFO L225 Difference]: With dead ends: 289 [2020-12-23 00:46:56,521 INFO L226 Difference]: Without dead ends: 184 [2020-12-23 00:46:56,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:46:56,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-23 00:46:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-12-23 00:46:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 00:46:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2020-12-23 00:46:56,527 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 177 [2020-12-23 00:46:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:56,527 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2020-12-23 00:46:56,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 00:46:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2020-12-23 00:46:56,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-23 00:46:56,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:56,529 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:56,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:46:56,730 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:56,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1693026416, now seen corresponding path program 37 times [2020-12-23 00:46:56,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:56,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414302816] [2020-12-23 00:46:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:57,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414302816] [2020-12-23 00:46:57,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075193977] [2020-12-23 00:46:57,704 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 [2020-12-23 00:46:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:57,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:46:57,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:58,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:58,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 00:46:58,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124184060] [2020-12-23 00:46:58,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:46:58,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:58,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:46:58,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:46:58,066 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 40 states. [2020-12-23 00:46:58,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:58,247 INFO L93 Difference]: Finished difference Result 292 states and 300 transitions. [2020-12-23 00:46:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:46:58,248 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 181 [2020-12-23 00:46:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:58,251 INFO L225 Difference]: With dead ends: 292 [2020-12-23 00:46:58,251 INFO L226 Difference]: Without dead ends: 185 [2020-12-23 00:46:58,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:46:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-23 00:46:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-12-23 00:46:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 00:46:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2020-12-23 00:46:58,257 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 181 [2020-12-23 00:46:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:58,257 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2020-12-23 00:46:58,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:46:58,258 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2020-12-23 00:46:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-23 00:46:58,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:58,259 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:58,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:46:58,474 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:58,475 INFO L82 PathProgramCache]: Analyzing trace with hash 45772974, now seen corresponding path program 38 times [2020-12-23 00:46:58,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:58,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516907229] [2020-12-23 00:46:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:59,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516907229] [2020-12-23 00:46:59,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864814633] [2020-12-23 00:46:59,545 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 [2020-12-23 00:46:59,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:46:59,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:59,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:46:59,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:59,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:59,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 00:46:59,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668121819] [2020-12-23 00:46:59,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:46:59,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:59,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:46:59,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:46:59,904 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 41 states. [2020-12-23 00:47:00,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:47:00,037 INFO L93 Difference]: Finished difference Result 294 states and 302 transitions. [2020-12-23 00:47:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:47:00,038 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 183 [2020-12-23 00:47:00,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:47:00,039 INFO L225 Difference]: With dead ends: 294 [2020-12-23 00:47:00,039 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 00:47:00,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:47:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 00:47:00,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-12-23 00:47:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 00:47:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2020-12-23 00:47:00,050 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2020-12-23 00:47:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:47:00,050 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2020-12-23 00:47:00,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:47:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2020-12-23 00:47:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-23 00:47:00,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:47:00,052 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:47:00,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:00,266 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:47:00,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:47:00,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1878147436, now seen corresponding path program 39 times [2020-12-23 00:47:00,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:47:00,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199666977] [2020-12-23 00:47:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:47:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:47:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:47:01,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199666977] [2020-12-23 00:47:01,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651508832] [2020-12-23 00:47:01,343 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 [2020-12-23 00:47:02,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 00:47:02,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:47:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:47:02,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:47:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2020-12-23 00:47:02,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:47:02,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 52 [2020-12-23 00:47:02,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659557192] [2020-12-23 00:47:02,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 00:47:02,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:47:02,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 00:47:02,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:47:02,938 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 52 states. [2020-12-23 00:47:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:47:03,200 INFO L93 Difference]: Finished difference Result 299 states and 308 transitions. [2020-12-23 00:47:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 00:47:03,201 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 185 [2020-12-23 00:47:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:47:03,202 INFO L225 Difference]: With dead ends: 299 [2020-12-23 00:47:03,202 INFO L226 Difference]: Without dead ends: 192 [2020-12-23 00:47:03,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:47:03,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-23 00:47:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-12-23 00:47:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-23 00:47:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2020-12-23 00:47:03,209 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 185 [2020-12-23 00:47:03,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:47:03,209 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2020-12-23 00:47:03,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 00:47:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2020-12-23 00:47:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-12-23 00:47:03,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:47:03,211 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:47:03,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 00:47:03,416 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:47:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:47:03,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1682311512, now seen corresponding path program 40 times [2020-12-23 00:47:03,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:47:03,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263365615] [2020-12-23 00:47:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:47:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:47:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-12-23 00:47:04,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263365615] [2020-12-23 00:47:04,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532871133] [2020-12-23 00:47:04,515 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 [2020-12-23 00:47:04,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:47:04,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:47:04,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:47:04,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:47:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2020-12-23 00:47:05,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:47:05,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2020-12-23 00:47:05,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896321840] [2020-12-23 00:47:05,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 00:47:05,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:47:05,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 00:47:05,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 00:47:05,519 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 54 states. [2020-12-23 00:47:05,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:47:05,797 INFO L93 Difference]: Finished difference Result 305 states and 314 transitions. [2020-12-23 00:47:05,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 00:47:05,798 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 189 [2020-12-23 00:47:05,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:47:05,800 INFO L225 Difference]: With dead ends: 305 [2020-12-23 00:47:05,800 INFO L226 Difference]: Without dead ends: 196 [2020-12-23 00:47:05,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 00:47:05,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-23 00:47:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-12-23 00:47:05,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 00:47:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2020-12-23 00:47:05,807 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 189 [2020-12-23 00:47:05,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:47:05,807 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2020-12-23 00:47:05,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 00:47:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2020-12-23 00:47:05,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-12-23 00:47:05,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:47:05,809 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:47:06,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:47:06,023 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:47:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:47:06,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1750482404, now seen corresponding path program 41 times [2020-12-23 00:47:06,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:47:06,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388337826] [2020-12-23 00:47:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:47:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:47:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 00:47:07,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388337826] [2020-12-23 00:47:07,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058738491] [2020-12-23 00:47:07,269 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