/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/xor3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:38:08,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:38:08,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:38:08,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:38:08,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:38:08,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:38:08,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:38:08,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:38:08,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:38:08,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:38:08,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:38:08,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:38:08,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:38:08,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:38:08,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:38:08,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:38:08,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:38:08,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:38:08,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:38:08,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:38:08,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:38:08,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:38:08,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:38:08,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:38:08,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:38:08,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:38:08,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:38:08,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:38:08,855 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:38:08,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:38:08,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:38:08,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:38:08,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:38:08,908 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:38:08,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:38:08,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:38:08,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:38:08,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:38:08,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:38:08,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:38:08,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:38:08,912 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:38:08,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:38:08,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:38:08,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:38:08,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:38:08,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:38:08,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:38:08,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:38:08,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:38:08,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:38:08,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:38:08,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:38:08,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:38:08,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:38:09,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:38:09,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:38:09,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:38:09,392 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:38:09,393 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:38:09,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor3.i [2021-01-06 10:38:09,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/87aa63055/13a16bf4b9cb4e5fa3de084b8357add2/FLAG06f441cea [2021-01-06 10:38:10,078 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:38:10,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/xor3.i [2021-01-06 10:38:10,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/87aa63055/13a16bf4b9cb4e5fa3de084b8357add2/FLAG06f441cea [2021-01-06 10:38:10,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/87aa63055/13a16bf4b9cb4e5fa3de084b8357add2 [2021-01-06 10:38:10,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:38:10,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:38:10,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:38:10,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:38:10,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:38:10,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:38:10" (1/1) ... [2021-01-06 10:38:10,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41936f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:38:10, skipping insertion in model container [2021-01-06 10:38:10,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:38:10" (1/1) ... [2021-01-06 10:38:10,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:38:10,519 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~res~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~res~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] 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[9999]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:38:10,816 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/xor3.i[1297,1310] [2021-01-06 10:38:10,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:38:10,843 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~res~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~res~0,] ----Is the binary operator a bitwise operator? true 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~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],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[39996],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:38:10,893 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/xor3.i[1297,1310] [2021-01-06 10:38:10,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:38:10,916 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:38:10,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:38:10 WrapperNode [2021-01-06 10:38:10,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:38:10,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:38:10,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:38:10,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:38:10,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:38:10" (1/1) ... [2021-01-06 10:38:10,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:38:10" (1/1) ... [2021-01-06 10:38:10,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:38:10,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:38:10,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:38:10,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:38:10,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:38:10" (1/1) ... [2021-01-06 10:38:10,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:38:10" (1/1) ... [2021-01-06 10:38:10,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:38:10" (1/1) ... [2021-01-06 10:38:10,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:38:10" (1/1) ... [2021-01-06 10:38:10,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:38:10" (1/1) ... [2021-01-06 10:38:10,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:38:10" (1/1) ... [2021-01-06 10:38:11,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:38:10" (1/1) ... [2021-01-06 10:38:11,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:38:11,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:38:11,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:38:11,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:38:11,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:38:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:38:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:38:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:38:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:38:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:38:11,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:38:11,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:38:11,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:38:11,503 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:38:11,504 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 10:38:11,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:38:11 BoogieIcfgContainer [2021-01-06 10:38:11,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:38:11,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:38:11,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:38:11,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:38:11,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:38:10" (1/3) ... [2021-01-06 10:38:11,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c500022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:38:11, skipping insertion in model container [2021-01-06 10:38:11,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:38:10" (2/3) ... [2021-01-06 10:38:11,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c500022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:38:11, skipping insertion in model container [2021-01-06 10:38:11,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:38:11" (3/3) ... [2021-01-06 10:38:11,515 INFO L111 eAbstractionObserver]: Analyzing ICFG xor3.i [2021-01-06 10:38:11,521 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:38:11,526 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:38:11,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:38:11,598 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:38:11,600 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:38:11,600 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:38:11,600 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:38:11,601 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:38:11,601 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:38:11,601 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:38:11,601 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:38:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-01-06 10:38:11,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:38:11,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:11,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:11,630 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:11,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2021-01-06 10:38:11,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:11,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855566524] [2021-01-06 10:38:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:38:11,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855566524] [2021-01-06 10:38:11,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:38:11,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:38:11,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482485437] [2021-01-06 10:38:11,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:38:11,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:11,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:38:11,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:38:11,987 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2021-01-06 10:38:12,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:12,050 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 10:38:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:38:12,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 10:38:12,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:12,062 INFO L225 Difference]: With dead ends: 52 [2021-01-06 10:38:12,062 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 10:38:12,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:38:12,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 10:38:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-01-06 10:38:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:38:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 10:38:12,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-01-06 10:38:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:12,104 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 10:38:12,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:38:12,104 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 10:38:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:38:12,105 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:12,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:12,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:38:12,106 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:12,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:12,106 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2021-01-06 10:38:12,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:12,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040392265] [2021-01-06 10:38:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:38:12,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040392265] [2021-01-06 10:38:12,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371739410] [2021-01-06 10:38:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:12,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:38:12,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:38:12,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:38:12,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:38:12,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558146348] [2021-01-06 10:38:12,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:38:12,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:12,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:38:12,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:38:12,286 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2021-01-06 10:38:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:12,322 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 10:38:12,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:38:12,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:38:12,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:12,324 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:38:12,324 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 10:38:12,325 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 [2021-01-06 10:38:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 10:38:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-01-06 10:38:12,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:38:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-01-06 10:38:12,335 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-01-06 10:38:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:12,336 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-01-06 10:38:12,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:38:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-01-06 10:38:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:38:12,339 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:12,339 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] [2021-01-06 10:38:12,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:38:12,541 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:12,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:12,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2021-01-06 10:38:12,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:12,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65325383] [2021-01-06 10:38:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:38:12,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65325383] [2021-01-06 10:38:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007520608] [2021-01-06 10:38:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:12,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:38:12,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:38:12,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:38:12,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:38:12,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935114426] [2021-01-06 10:38:12,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:38:12,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:12,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:38:12,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:38:12,781 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2021-01-06 10:38:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:12,805 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-01-06 10:38:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:38:12,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-01-06 10:38:12,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:12,807 INFO L225 Difference]: With dead ends: 38 [2021-01-06 10:38:12,807 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:38:12,808 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 [2021-01-06 10:38:12,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:38:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-01-06 10:38:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:38:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-01-06 10:38:12,815 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-01-06 10:38:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:12,815 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-01-06 10:38:12,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:38:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-01-06 10:38:12,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:38:12,817 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:12,817 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] [2021-01-06 10:38:13,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:13,027 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:13,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2021-01-06 10:38:13,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:13,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582148839] [2021-01-06 10:38:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:38:13,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582148839] [2021-01-06 10:38:13,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845045064] [2021-01-06 10:38:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:13,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:38:13,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:38:13,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:13,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:38:13,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176458415] [2021-01-06 10:38:13,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:38:13,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:13,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:38:13,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:38:13,377 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2021-01-06 10:38:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:13,401 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-01-06 10:38:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:38:13,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2021-01-06 10:38:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:13,403 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:38:13,403 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:38:13,404 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 [2021-01-06 10:38:13,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:38:13,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 10:38:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:38:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-06 10:38:13,413 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2021-01-06 10:38:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:13,413 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-06 10:38:13,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:38:13,414 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-06 10:38:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:38:13,415 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:13,415 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] [2021-01-06 10:38:13,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:13,620 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:13,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:13,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2021-01-06 10:38:13,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:13,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995801803] [2021-01-06 10:38:13,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:38:13,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995801803] [2021-01-06 10:38:13,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596660854] [2021-01-06 10:38:13,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:13,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:13,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:13,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:38:13,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:38:13,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:13,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:38:13,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135460936] [2021-01-06 10:38:13,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:38:13,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:13,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:38:13,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:38:13,828 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2021-01-06 10:38:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:13,918 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-01-06 10:38:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:38:13,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2021-01-06 10:38:13,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:13,920 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:38:13,920 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 10:38:13,921 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 [2021-01-06 10:38:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 10:38:13,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-01-06 10:38:13,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:38:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 10:38:13,929 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-01-06 10:38:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:13,929 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 10:38:13,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:38:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 10:38:13,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 10:38:13,931 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:13,931 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] [2021-01-06 10:38:14,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:14,145 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:14,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2021-01-06 10:38:14,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:14,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49113379] [2021-01-06 10:38:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:38:14,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49113379] [2021-01-06 10:38:14,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433054268] [2021-01-06 10:38:14,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:14,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:38:14,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:14,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:38:14,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:38:14,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:14,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:38:14,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587520388] [2021-01-06 10:38:14,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:38:14,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:14,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:38:14,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:38:14,386 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 6 states. [2021-01-06 10:38:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:14,447 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-01-06 10:38:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:38:14,450 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2021-01-06 10:38:14,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:14,451 INFO L225 Difference]: With dead ends: 72 [2021-01-06 10:38:14,452 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 10:38:14,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:38:14,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 10:38:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-01-06 10:38:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:38:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-01-06 10:38:14,467 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2021-01-06 10:38:14,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:14,469 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-01-06 10:38:14,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:38:14,469 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-01-06 10:38:14,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 10:38:14,471 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:14,471 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:14,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:38:14,688 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:14,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash -733217450, now seen corresponding path program 4 times [2021-01-06 10:38:14,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:14,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867083290] [2021-01-06 10:38:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:38:14,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867083290] [2021-01-06 10:38:14,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871181273] [2021-01-06 10:38:14,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:14,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:14,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:14,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:38:14,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 10:38:15,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:15,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-01-06 10:38:15,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167305228] [2021-01-06 10:38:15,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:38:15,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:15,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:38:15,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:38:15,071 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2021-01-06 10:38:15,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:15,198 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-01-06 10:38:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:38:15,198 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2021-01-06 10:38:15,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:15,199 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:38:15,200 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 10:38:15,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:38:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 10:38:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-01-06 10:38:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:38:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-01-06 10:38:15,208 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2021-01-06 10:38:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:15,208 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-01-06 10:38:15,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:38:15,208 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-01-06 10:38:15,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:38:15,209 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:15,210 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:15,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:15,424 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:15,425 INFO L82 PathProgramCache]: Analyzing trace with hash 183219474, now seen corresponding path program 5 times [2021-01-06 10:38:15,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:15,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708163773] [2021-01-06 10:38:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 10:38:15,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708163773] [2021-01-06 10:38:15,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587152324] [2021-01-06 10:38:15,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:15,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:38:15,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:15,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:38:15,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:38:15,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:15,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-01-06 10:38:15,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974021084] [2021-01-06 10:38:15,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:38:15,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:15,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:38:15,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:38:15,819 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 11 states. [2021-01-06 10:38:15,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:15,934 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2021-01-06 10:38:15,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:38:15,935 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2021-01-06 10:38:15,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:15,936 INFO L225 Difference]: With dead ends: 107 [2021-01-06 10:38:15,936 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 10:38:15,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:38:15,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 10:38:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2021-01-06 10:38:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 10:38:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-01-06 10:38:15,943 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 51 [2021-01-06 10:38:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:15,944 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-01-06 10:38:15,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:38:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-01-06 10:38:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 10:38:15,945 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:15,945 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:16,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:16,160 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:16,161 INFO L82 PathProgramCache]: Analyzing trace with hash -820989490, now seen corresponding path program 6 times [2021-01-06 10:38:16,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:16,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451006540] [2021-01-06 10:38:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-01-06 10:38:16,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451006540] [2021-01-06 10:38:16,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154628694] [2021-01-06 10:38:16,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:16,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:38:16,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:16,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:38:16,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:38:16,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:16,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-01-06 10:38:16,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040905360] [2021-01-06 10:38:16,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:38:16,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:16,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:38:16,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:38:16,580 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 10 states. [2021-01-06 10:38:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:16,634 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-01-06 10:38:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:38:16,635 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2021-01-06 10:38:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:16,635 INFO L225 Difference]: With dead ends: 115 [2021-01-06 10:38:16,636 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 10:38:16,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:38:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 10:38:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-01-06 10:38:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:38:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-01-06 10:38:16,644 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 59 [2021-01-06 10:38:16,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:16,644 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-01-06 10:38:16,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:38:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-01-06 10:38:16,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:38:16,645 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:16,645 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:16,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:38:16,861 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:16,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:16,862 INFO L82 PathProgramCache]: Analyzing trace with hash -164647158, now seen corresponding path program 7 times [2021-01-06 10:38:16,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:16,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131831884] [2021-01-06 10:38:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 10:38:16,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131831884] [2021-01-06 10:38:16,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677826965] [2021-01-06 10:38:16,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:17,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:38:17,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 10:38:17,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:17,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:38:17,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489454478] [2021-01-06 10:38:17,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:38:17,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:17,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:38:17,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:38:17,170 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 9 states. [2021-01-06 10:38:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:17,212 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2021-01-06 10:38:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:38:17,212 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2021-01-06 10:38:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:17,213 INFO L225 Difference]: With dead ends: 118 [2021-01-06 10:38:17,214 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 10:38:17,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:38:17,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 10:38:17,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-01-06 10:38:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:38:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-01-06 10:38:17,239 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2021-01-06 10:38:17,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:17,240 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-01-06 10:38:17,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:38:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-01-06 10:38:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:38:17,248 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:17,248 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:17,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:17,449 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:17,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:17,449 INFO L82 PathProgramCache]: Analyzing trace with hash 751550920, now seen corresponding path program 8 times [2021-01-06 10:38:17,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:17,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134355361] [2021-01-06 10:38:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 10:38:17,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134355361] [2021-01-06 10:38:17,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720570046] [2021-01-06 10:38:17,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:17,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:17,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:17,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:38:17,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 10:38:17,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:17,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:38:17,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778558075] [2021-01-06 10:38:17,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:38:17,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:17,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:38:17,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:38:17,888 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 10 states. [2021-01-06 10:38:17,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:17,922 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-01-06 10:38:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:38:17,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2021-01-06 10:38:17,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:17,924 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:38:17,924 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 10:38:17,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:38:17,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 10:38:17,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-01-06 10:38:17,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:38:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-01-06 10:38:17,930 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 65 [2021-01-06 10:38:17,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:17,930 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-01-06 10:38:17,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:38:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-01-06 10:38:17,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 10:38:17,931 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:17,932 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:18,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:18,147 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:18,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:18,149 INFO L82 PathProgramCache]: Analyzing trace with hash 749608198, now seen corresponding path program 9 times [2021-01-06 10:38:18,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:18,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613463752] [2021-01-06 10:38:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 10:38:18,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613463752] [2021-01-06 10:38:18,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243241320] [2021-01-06 10:38:18,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:18,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:38:18,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:18,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:38:18,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-01-06 10:38:18,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:18,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-01-06 10:38:18,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666822948] [2021-01-06 10:38:18,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:38:18,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:18,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:38:18,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:38:18,548 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 14 states. [2021-01-06 10:38:18,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:18,621 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2021-01-06 10:38:18,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:38:18,622 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2021-01-06 10:38:18,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:18,623 INFO L225 Difference]: With dead ends: 125 [2021-01-06 10:38:18,623 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 10:38:18,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:38:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 10:38:18,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-01-06 10:38:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 10:38:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-01-06 10:38:18,632 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 67 [2021-01-06 10:38:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:18,634 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-01-06 10:38:18,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:38:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-01-06 10:38:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:38:18,636 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:18,636 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:18,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:38:18,853 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:18,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:18,854 INFO L82 PathProgramCache]: Analyzing trace with hash 258477634, now seen corresponding path program 10 times [2021-01-06 10:38:18,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:18,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093135492] [2021-01-06 10:38:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:38:19,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093135492] [2021-01-06 10:38:19,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426403090] [2021-01-06 10:38:19,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:19,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:19,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:19,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:38:19,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:38:19,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:19,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:38:19,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956711358] [2021-01-06 10:38:19,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:38:19,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:19,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:38:19,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:38:19,215 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 12 states. [2021-01-06 10:38:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:19,257 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-01-06 10:38:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:38:19,258 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2021-01-06 10:38:19,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:19,259 INFO L225 Difference]: With dead ends: 128 [2021-01-06 10:38:19,259 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:38:19,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:38:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:38:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-01-06 10:38:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 10:38:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-01-06 10:38:19,264 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 71 [2021-01-06 10:38:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:19,264 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-01-06 10:38:19,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:38:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-01-06 10:38:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 10:38:19,266 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:19,266 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:19,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:38:19,481 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:19,482 INFO L82 PathProgramCache]: Analyzing trace with hash -996375808, now seen corresponding path program 11 times [2021-01-06 10:38:19,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:19,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310747411] [2021-01-06 10:38:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:38:19,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310747411] [2021-01-06 10:38:19,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828273689] [2021-01-06 10:38:19,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:19,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 10:38:19,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:19,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:38:19,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:38:20,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:20,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:38:20,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299869120] [2021-01-06 10:38:20,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:38:20,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:20,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:38:20,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:38:20,081 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 13 states. [2021-01-06 10:38:20,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:20,120 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-01-06 10:38:20,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:38:20,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 73 [2021-01-06 10:38:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:20,122 INFO L225 Difference]: With dead ends: 130 [2021-01-06 10:38:20,122 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 10:38:20,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:38:20,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 10:38:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-01-06 10:38:20,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 10:38:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-01-06 10:38:20,127 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 73 [2021-01-06 10:38:20,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:20,127 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-01-06 10:38:20,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:38:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-01-06 10:38:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 10:38:20,128 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:20,128 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:20,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:38:20,342 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:20,343 INFO L82 PathProgramCache]: Analyzing trace with hash -24723394, now seen corresponding path program 12 times [2021-01-06 10:38:20,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:20,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175055098] [2021-01-06 10:38:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:38:20,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175055098] [2021-01-06 10:38:20,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497876554] [2021-01-06 10:38:20,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:21,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:38:21,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:21,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:38:21,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-01-06 10:38:21,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:21,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-01-06 10:38:21,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095217824] [2021-01-06 10:38:21,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:38:21,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:21,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:38:21,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:38:21,229 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 18 states. [2021-01-06 10:38:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:21,321 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-01-06 10:38:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:38:21,322 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2021-01-06 10:38:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:21,322 INFO L225 Difference]: With dead ends: 135 [2021-01-06 10:38:21,322 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 10:38:21,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:38:21,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 10:38:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-01-06 10:38:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 10:38:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-01-06 10:38:21,327 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 75 [2021-01-06 10:38:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:21,328 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-01-06 10:38:21,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:38:21,328 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-01-06 10:38:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 10:38:21,329 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:21,329 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 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] [2021-01-06 10:38:21,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:21,545 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:21,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:21,546 INFO L82 PathProgramCache]: Analyzing trace with hash 485205370, now seen corresponding path program 13 times [2021-01-06 10:38:21,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:21,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462688462] [2021-01-06 10:38:21,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:21,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462688462] [2021-01-06 10:38:21,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605532447] [2021-01-06 10:38:21,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:21,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:38:21,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:21,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:21,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 10:38:21,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367143643] [2021-01-06 10:38:21,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:38:21,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:21,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:38:21,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:38:21,915 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 15 states. [2021-01-06 10:38:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:21,967 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2021-01-06 10:38:21,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:38:21,968 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2021-01-06 10:38:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:21,969 INFO L225 Difference]: With dead ends: 138 [2021-01-06 10:38:21,969 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 10:38:21,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:38:21,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 10:38:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-01-06 10:38:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 10:38:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-01-06 10:38:21,974 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 79 [2021-01-06 10:38:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:21,974 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-01-06 10:38:21,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:38:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-01-06 10:38:21,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 10:38:21,975 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:21,976 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 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] [2021-01-06 10:38:22,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:38:22,190 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:22,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1798732856, now seen corresponding path program 14 times [2021-01-06 10:38:22,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:22,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785169343] [2021-01-06 10:38:22,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:22,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785169343] [2021-01-06 10:38:22,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153587091] [2021-01-06 10:38:22,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:22,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:22,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:22,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:38:22,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:22,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:22,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:38:22,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106833891] [2021-01-06 10:38:22,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:38:22,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:22,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:38:22,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:38:22,566 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 16 states. [2021-01-06 10:38:22,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:22,624 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2021-01-06 10:38:22,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:38:22,624 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2021-01-06 10:38:22,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:22,627 INFO L225 Difference]: With dead ends: 140 [2021-01-06 10:38:22,627 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 10:38:22,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:38:22,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 10:38:22,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-01-06 10:38:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 10:38:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-01-06 10:38:22,632 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 81 [2021-01-06 10:38:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:22,633 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-01-06 10:38:22,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:38:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-01-06 10:38:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 10:38:22,634 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:22,634 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 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] [2021-01-06 10:38:22,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:38:22,849 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:22,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 15 times [2021-01-06 10:38:22,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:22,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458989681] [2021-01-06 10:38:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:23,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458989681] [2021-01-06 10:38:23,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175299217] [2021-01-06 10:38:23,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:23,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:38:23,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:23,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:38:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-01-06 10:38:23,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:23,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2021-01-06 10:38:23,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508718213] [2021-01-06 10:38:23,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:38:23,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:23,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:38:23,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:38:23,494 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 22 states. [2021-01-06 10:38:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:23,703 INFO L93 Difference]: Finished difference Result 151 states and 162 transitions. [2021-01-06 10:38:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:38:23,703 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 83 [2021-01-06 10:38:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:23,704 INFO L225 Difference]: With dead ends: 151 [2021-01-06 10:38:23,704 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 10:38:23,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:38:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 10:38:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-01-06 10:38:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:38:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-01-06 10:38:23,709 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 83 [2021-01-06 10:38:23,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:23,710 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-01-06 10:38:23,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:38:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-01-06 10:38:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:38:23,711 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:23,711 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 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] [2021-01-06 10:38:23,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:38:23,926 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:23,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:23,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2009408050, now seen corresponding path program 16 times [2021-01-06 10:38:23,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:23,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758182358] [2021-01-06 10:38:23,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:38:24,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758182358] [2021-01-06 10:38:24,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334248437] [2021-01-06 10:38:24,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:24,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:24,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:24,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:38:24,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:38:24,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:24,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 10:38:24,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648432124] [2021-01-06 10:38:24,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:38:24,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:38:24,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:38:24,514 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 18 states. [2021-01-06 10:38:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:24,598 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2021-01-06 10:38:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:38:24,599 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2021-01-06 10:38:24,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:24,600 INFO L225 Difference]: With dead ends: 156 [2021-01-06 10:38:24,600 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 10:38:24,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:38:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 10:38:24,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-01-06 10:38:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 10:38:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-01-06 10:38:24,607 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 91 [2021-01-06 10:38:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:24,607 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-01-06 10:38:24,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:38:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-01-06 10:38:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 10:38:24,609 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:24,610 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 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] [2021-01-06 10:38:24,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:24,823 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:24,824 INFO L82 PathProgramCache]: Analyzing trace with hash 868076528, now seen corresponding path program 17 times [2021-01-06 10:38:24,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:24,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071919263] [2021-01-06 10:38:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:38:25,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071919263] [2021-01-06 10:38:25,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267498499] [2021-01-06 10:38:25,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:26,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-01-06 10:38:26,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:26,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:38:26,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-01-06 10:38:26,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:26,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2021-01-06 10:38:26,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103638829] [2021-01-06 10:38:26,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:38:26,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:26,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:38:26,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:38:26,285 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 25 states. [2021-01-06 10:38:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:26,450 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2021-01-06 10:38:26,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:38:26,451 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 93 [2021-01-06 10:38:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:26,452 INFO L225 Difference]: With dead ends: 167 [2021-01-06 10:38:26,452 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 10:38:26,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:38:26,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 10:38:26,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2021-01-06 10:38:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 10:38:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-01-06 10:38:26,457 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 93 [2021-01-06 10:38:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:26,458 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-01-06 10:38:26,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:38:26,458 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-01-06 10:38:26,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:38:26,459 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:26,459 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:26,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:26,673 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash -975128148, now seen corresponding path program 18 times [2021-01-06 10:38:26,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:26,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051070236] [2021-01-06 10:38:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-01-06 10:38:26,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051070236] [2021-01-06 10:38:26,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679491673] [2021-01-06 10:38:26,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:27,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 10:38:27,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:27,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:38:27,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-01-06 10:38:27,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:27,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2021-01-06 10:38:27,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41870504] [2021-01-06 10:38:27,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:38:27,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:27,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:38:27,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:38:27,818 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 25 states. [2021-01-06 10:38:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:27,927 INFO L93 Difference]: Finished difference Result 175 states and 184 transitions. [2021-01-06 10:38:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:38:27,928 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2021-01-06 10:38:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:27,929 INFO L225 Difference]: With dead ends: 175 [2021-01-06 10:38:27,929 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:38:27,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:38:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:38:27,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-01-06 10:38:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 10:38:27,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-01-06 10:38:27,934 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 101 [2021-01-06 10:38:27,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:27,934 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-01-06 10:38:27,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:38:27,934 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-01-06 10:38:27,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 10:38:27,935 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:27,935 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:28,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:38:28,151 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:28,152 INFO L82 PathProgramCache]: Analyzing trace with hash -470849048, now seen corresponding path program 19 times [2021-01-06 10:38:28,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:28,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433149516] [2021-01-06 10:38:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:38:28,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433149516] [2021-01-06 10:38:28,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649662236] [2021-01-06 10:38:28,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:28,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:38:28,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:38:28,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:28,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 10:38:28,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288151405] [2021-01-06 10:38:28,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:38:28,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:28,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:38:28,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:38:28,662 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 21 states. [2021-01-06 10:38:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:28,727 INFO L93 Difference]: Finished difference Result 178 states and 186 transitions. [2021-01-06 10:38:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:38:28,727 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2021-01-06 10:38:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:28,728 INFO L225 Difference]: With dead ends: 178 [2021-01-06 10:38:28,728 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 10:38:28,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:38:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 10:38:28,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-01-06 10:38:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:38:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-01-06 10:38:28,733 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 105 [2021-01-06 10:38:28,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:28,733 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-01-06 10:38:28,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:38:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-01-06 10:38:28,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-01-06 10:38:28,734 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:28,735 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:28,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:38:28,949 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:28,949 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 20 times [2021-01-06 10:38:28,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:28,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717727148] [2021-01-06 10:38:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:38:29,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717727148] [2021-01-06 10:38:29,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318540969] [2021-01-06 10:38:29,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:29,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:29,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:38:29,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:38:29,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:29,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 10:38:29,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971052359] [2021-01-06 10:38:29,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:38:29,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:29,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:38:29,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:38:29,510 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 22 states. [2021-01-06 10:38:29,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:29,585 INFO L93 Difference]: Finished difference Result 180 states and 188 transitions. [2021-01-06 10:38:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:38:29,586 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2021-01-06 10:38:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:29,587 INFO L225 Difference]: With dead ends: 180 [2021-01-06 10:38:29,587 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 10:38:29,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:38:29,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 10:38:29,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-01-06 10:38:29,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 10:38:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-01-06 10:38:29,592 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2021-01-06 10:38:29,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:29,592 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-01-06 10:38:29,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:38:29,593 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-01-06 10:38:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-01-06 10:38:29,593 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:29,594 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:29,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:29,808 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1518428956, now seen corresponding path program 21 times [2021-01-06 10:38:29,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:29,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183632072] [2021-01-06 10:38:29,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 10:38:30,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183632072] [2021-01-06 10:38:30,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786792119] [2021-01-06 10:38:30,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:30,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 10:38:30,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:30,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:38:30,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-01-06 10:38:30,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:30,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2021-01-06 10:38:30,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411259295] [2021-01-06 10:38:30,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:38:30,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:30,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:38:30,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:38:30,802 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 29 states. [2021-01-06 10:38:30,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:30,942 INFO L93 Difference]: Finished difference Result 185 states and 194 transitions. [2021-01-06 10:38:30,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:38:30,942 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2021-01-06 10:38:30,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:30,943 INFO L225 Difference]: With dead ends: 185 [2021-01-06 10:38:30,944 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 10:38:30,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:38:30,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 10:38:30,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2021-01-06 10:38:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-01-06 10:38:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2021-01-06 10:38:30,948 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 109 [2021-01-06 10:38:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:30,949 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2021-01-06 10:38:30,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:38:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2021-01-06 10:38:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-01-06 10:38:30,950 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:30,950 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 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] [2021-01-06 10:38:31,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 10:38:31,164 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 22 times [2021-01-06 10:38:31,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:31,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022158979] [2021-01-06 10:38:31,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:38:31,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022158979] [2021-01-06 10:38:31,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415162462] [2021-01-06 10:38:31,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:31,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:31,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:31,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:38:31,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:38:31,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:31,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 10:38:31,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439526001] [2021-01-06 10:38:31,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:38:31,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:31,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:38:31,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:38:31,824 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2021-01-06 10:38:31,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:31,897 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2021-01-06 10:38:31,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 10:38:31,898 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2021-01-06 10:38:31,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:31,899 INFO L225 Difference]: With dead ends: 188 [2021-01-06 10:38:31,899 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 10:38:31,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:38:31,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 10:38:31,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-01-06 10:38:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 10:38:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-01-06 10:38:31,904 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2021-01-06 10:38:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:31,904 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-01-06 10:38:31,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:38:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-01-06 10:38:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-06 10:38:31,905 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:31,905 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 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] [2021-01-06 10:38:32,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:32,121 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:32,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:32,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 23 times [2021-01-06 10:38:32,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:32,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292481212] [2021-01-06 10:38:32,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:38:32,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292481212] [2021-01-06 10:38:32,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127561752] [2021-01-06 10:38:32,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:33,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-01-06 10:38:33,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:33,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:38:33,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:38:33,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:33,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 10:38:33,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444777042] [2021-01-06 10:38:33,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:38:33,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:33,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:38:33,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:38:33,896 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 25 states. [2021-01-06 10:38:33,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:33,973 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2021-01-06 10:38:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:38:33,974 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2021-01-06 10:38:33,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:33,975 INFO L225 Difference]: With dead ends: 190 [2021-01-06 10:38:33,975 INFO L226 Difference]: Without dead ends: 119 [2021-01-06 10:38:33,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:38:33,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-06 10:38:33,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-01-06 10:38:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 10:38:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-01-06 10:38:33,980 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 115 [2021-01-06 10:38:33,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:33,980 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-01-06 10:38:33,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:38:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-01-06 10:38:33,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 10:38:33,981 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:33,981 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 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] [2021-01-06 10:38:34,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:38:34,197 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:34,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1102432228, now seen corresponding path program 24 times [2021-01-06 10:38:34,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:34,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891060725] [2021-01-06 10:38:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:38:34,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891060725] [2021-01-06 10:38:34,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525051857] [2021-01-06 10:38:34,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:36,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 10:38:36,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:36,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:38:36,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2021-01-06 10:38:37,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:37,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2021-01-06 10:38:37,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124158055] [2021-01-06 10:38:37,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:38:37,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:37,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:38:37,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:38:37,173 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 33 states. [2021-01-06 10:38:37,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:37,432 INFO L93 Difference]: Finished difference Result 201 states and 212 transitions. [2021-01-06 10:38:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:38:37,433 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 117 [2021-01-06 10:38:37,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:37,434 INFO L225 Difference]: With dead ends: 201 [2021-01-06 10:38:37,434 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 10:38:37,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:38:37,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 10:38:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2021-01-06 10:38:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-01-06 10:38:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-01-06 10:38:37,439 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 117 [2021-01-06 10:38:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:37,439 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-01-06 10:38:37,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:38:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-01-06 10:38:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-01-06 10:38:37,440 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:37,440 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 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] [2021-01-06 10:38:37,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:38:37,656 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:37,656 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 25 times [2021-01-06 10:38:37,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:37,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151998502] [2021-01-06 10:38:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:38,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151998502] [2021-01-06 10:38:38,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324587999] [2021-01-06 10:38:38,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:38,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:38:38,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:38,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:38,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 10:38:38,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174466089] [2021-01-06 10:38:38,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:38:38,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:38,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:38:38,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:38:38,418 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 27 states. [2021-01-06 10:38:38,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:38,496 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2021-01-06 10:38:38,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:38:38,497 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 125 [2021-01-06 10:38:38,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:38,498 INFO L225 Difference]: With dead ends: 206 [2021-01-06 10:38:38,498 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 10:38:38,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:38:38,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 10:38:38,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-01-06 10:38:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-01-06 10:38:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2021-01-06 10:38:38,506 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 125 [2021-01-06 10:38:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:38,507 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2021-01-06 10:38:38,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:38:38,507 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2021-01-06 10:38:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-01-06 10:38:38,508 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:38,508 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] [2021-01-06 10:38:38,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:38:38,723 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:38,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:38,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 26 times [2021-01-06 10:38:38,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:38,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614251202] [2021-01-06 10:38:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:39,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614251202] [2021-01-06 10:38:39,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977576618] [2021-01-06 10:38:39,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:39,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:39,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:39,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:38:39,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:39,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:39,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 10:38:39,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674365019] [2021-01-06 10:38:39,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:38:39,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:39,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:38:39,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:38:39,525 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2021-01-06 10:38:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:39,619 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2021-01-06 10:38:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:38:39,620 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2021-01-06 10:38:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:39,621 INFO L225 Difference]: With dead ends: 208 [2021-01-06 10:38:39,621 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 10:38:39,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:38:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 10:38:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-01-06 10:38:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 10:38:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2021-01-06 10:38:39,626 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2021-01-06 10:38:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:39,626 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2021-01-06 10:38:39,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:38:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2021-01-06 10:38:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-01-06 10:38:39,627 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:39,627 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] [2021-01-06 10:38:39,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:38:39,842 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:39,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 27 times [2021-01-06 10:38:39,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:39,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040518275] [2021-01-06 10:38:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:40,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040518275] [2021-01-06 10:38:40,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020324497] [2021-01-06 10:38:40,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:40,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:38:40,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:40,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:38:40,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2021-01-06 10:38:41,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:41,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2021-01-06 10:38:41,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095069058] [2021-01-06 10:38:41,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:38:41,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:41,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:38:41,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:38:41,119 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 36 states. [2021-01-06 10:38:41,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:41,299 INFO L93 Difference]: Finished difference Result 213 states and 222 transitions. [2021-01-06 10:38:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 10:38:41,299 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 129 [2021-01-06 10:38:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:41,300 INFO L225 Difference]: With dead ends: 213 [2021-01-06 10:38:41,300 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 10:38:41,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:38:41,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 10:38:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-01-06 10:38:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 10:38:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2021-01-06 10:38:41,306 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 129 [2021-01-06 10:38:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:41,306 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2021-01-06 10:38:41,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:38:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2021-01-06 10:38:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-01-06 10:38:41,307 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:41,307 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 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] [2021-01-06 10:38:41,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:41,523 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:41,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2138537200, now seen corresponding path program 28 times [2021-01-06 10:38:41,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:41,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736382659] [2021-01-06 10:38:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:38:42,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736382659] [2021-01-06 10:38:42,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190843521] [2021-01-06 10:38:42,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:42,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:42,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:42,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:38:42,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:38:42,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:42,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 10:38:42,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922241577] [2021-01-06 10:38:42,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:38:42,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:42,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:38:42,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:38:42,366 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 30 states. [2021-01-06 10:38:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:42,478 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2021-01-06 10:38:42,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:38:42,479 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 133 [2021-01-06 10:38:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:42,480 INFO L225 Difference]: With dead ends: 216 [2021-01-06 10:38:42,480 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 10:38:42,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:38:42,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 10:38:42,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-01-06 10:38:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 10:38:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2021-01-06 10:38:42,487 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2021-01-06 10:38:42,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:42,487 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2021-01-06 10:38:42,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 10:38:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2021-01-06 10:38:42,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:38:42,488 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:42,488 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] [2021-01-06 10:38:42,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:42,701 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:42,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:42,702 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 29 times [2021-01-06 10:38:42,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:42,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866776089] [2021-01-06 10:38:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:38:43,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866776089] [2021-01-06 10:38:43,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111135816] [2021-01-06 10:38:43,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:49,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-01-06 10:39:49,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:39:49,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:39:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:39:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2021-01-06 10:39:49,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:39:49,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2021-01-06 10:39:49,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494406058] [2021-01-06 10:39:49,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 10:39:49,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:39:49,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 10:39:49,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:39:49,865 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 39 states. [2021-01-06 10:39:50,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:39:50,149 INFO L93 Difference]: Finished difference Result 227 states and 238 transitions. [2021-01-06 10:39:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:39:50,150 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 135 [2021-01-06 10:39:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:39:50,151 INFO L225 Difference]: With dead ends: 227 [2021-01-06 10:39:50,152 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 10:39:50,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:39:50,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 10:39:50,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2021-01-06 10:39:50,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 10:39:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2021-01-06 10:39:50,158 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 135 [2021-01-06 10:39:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:39:50,158 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2021-01-06 10:39:50,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 10:39:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2021-01-06 10:39:50,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-01-06 10:39:50,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:39:50,159 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:39:50,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:50,360 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:39:50,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:39:50,361 INFO L82 PathProgramCache]: Analyzing trace with hash 191675914, now seen corresponding path program 30 times [2021-01-06 10:39:50,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:39:50,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861115545] [2021-01-06 10:39:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:39:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:39:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-01-06 10:39:50,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861115545] [2021-01-06 10:39:50,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28787141] [2021-01-06 10:39:50,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:54,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 10:39:54,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:39:54,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:39:54,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:39:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-01-06 10:39:54,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:39:54,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2021-01-06 10:39:54,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755550956] [2021-01-06 10:39:54,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:39:54,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:39:54,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:39:54,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:39:54,672 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 40 states. [2021-01-06 10:39:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:39:54,862 INFO L93 Difference]: Finished difference Result 235 states and 244 transitions. [2021-01-06 10:39:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:39:54,863 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 143 [2021-01-06 10:39:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:39:54,864 INFO L225 Difference]: With dead ends: 235 [2021-01-06 10:39:54,864 INFO L226 Difference]: Without dead ends: 150 [2021-01-06 10:39:54,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:39:54,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-01-06 10:39:54,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-01-06 10:39:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2021-01-06 10:39:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2021-01-06 10:39:54,870 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 143 [2021-01-06 10:39:54,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:39:54,870 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2021-01-06 10:39:54,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:39:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2021-01-06 10:39:54,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-01-06 10:39:54,871 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:39:54,872 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 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] [2021-01-06 10:39:55,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 10:39:55,085 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:39:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:39:55,086 INFO L82 PathProgramCache]: Analyzing trace with hash 10412358, now seen corresponding path program 31 times [2021-01-06 10:39:55,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:39:55,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982492081] [2021-01-06 10:39:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:39:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:39:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:39:55,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982492081] [2021-01-06 10:39:55,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129771740] [2021-01-06 10:39:55,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:39:55,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:39:55,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:39:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:39:56,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:39:56,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 10:39:56,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614834028] [2021-01-06 10:39:56,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:39:56,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:39:56,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:39:56,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:39:56,042 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 33 states. [2021-01-06 10:39:56,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:39:56,178 INFO L93 Difference]: Finished difference Result 238 states and 246 transitions. [2021-01-06 10:39:56,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:39:56,178 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 147 [2021-01-06 10:39:56,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:39:56,180 INFO L225 Difference]: With dead ends: 238 [2021-01-06 10:39:56,180 INFO L226 Difference]: Without dead ends: 151 [2021-01-06 10:39:56,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:39:56,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-01-06 10:39:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-01-06 10:39:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2021-01-06 10:39:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2021-01-06 10:39:56,185 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 147 [2021-01-06 10:39:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:39:56,185 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2021-01-06 10:39:56,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:39:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2021-01-06 10:39:56,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-01-06 10:39:56,186 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:39:56,187 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] [2021-01-06 10:39:56,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:56,401 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:39:56,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:39:56,402 INFO L82 PathProgramCache]: Analyzing trace with hash 308754692, now seen corresponding path program 32 times [2021-01-06 10:39:56,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:39:56,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188984228] [2021-01-06 10:39:56,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:39:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:39:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:39:57,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188984228] [2021-01-06 10:39:57,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609677465] [2021-01-06 10:39:57,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:57,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:39:57,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:39:57,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 10:39:57,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:39:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:39:57,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:39:57,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 10:39:57,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605552128] [2021-01-06 10:39:57,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:39:57,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:39:57,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:39:57,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:39:57,475 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 34 states. [2021-01-06 10:39:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:39:57,590 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2021-01-06 10:39:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:39:57,590 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2021-01-06 10:39:57,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:39:57,591 INFO L225 Difference]: With dead ends: 240 [2021-01-06 10:39:57,592 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 10:39:57,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:39:57,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 10:39:57,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-01-06 10:39:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 10:39:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-01-06 10:39:57,596 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2021-01-06 10:39:57,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:39:57,597 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-01-06 10:39:57,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:39:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-01-06 10:39:57,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 10:39:57,598 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:39:57,598 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] [2021-01-06 10:39:57,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 10:39:57,813 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:39:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:39:57,814 INFO L82 PathProgramCache]: Analyzing trace with hash -747071166, now seen corresponding path program 33 times [2021-01-06 10:39:57,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:39:57,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116812141] [2021-01-06 10:39:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:39:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:39:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:39:58,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116812141] [2021-01-06 10:39:58,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913427377] [2021-01-06 10:39:58,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:40:00,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:40:00,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:40:00,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:40:00,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:40:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2021-01-06 10:40:00,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:40:00,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 12] total 44 [2021-01-06 10:40:00,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791892018] [2021-01-06 10:40:00,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 10:40:00,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:40:00,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 10:40:00,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:40:00,512 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 44 states. [2021-01-06 10:40:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:40:00,944 INFO L93 Difference]: Finished difference Result 251 states and 262 transitions. [2021-01-06 10:40:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:40:00,945 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 151 [2021-01-06 10:40:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:40:00,947 INFO L225 Difference]: With dead ends: 251 [2021-01-06 10:40:00,947 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 10:40:00,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:40:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 10:40:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2021-01-06 10:40:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 10:40:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2021-01-06 10:40:00,953 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 151 [2021-01-06 10:40:00,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:40:00,954 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2021-01-06 10:40:00,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 10:40:00,954 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2021-01-06 10:40:00,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-01-06 10:40:00,955 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:40:00,955 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 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] [2021-01-06 10:40:01,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:40:01,170 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:40:01,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:40:01,170 INFO L82 PathProgramCache]: Analyzing trace with hash -629222402, now seen corresponding path program 34 times [2021-01-06 10:40:01,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:40:01,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233577332] [2021-01-06 10:40:01,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:40:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:40:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-01-06 10:40:01,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233577332] [2021-01-06 10:40:01,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47035587] [2021-01-06 10:40:01,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:40:02,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:40:02,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:40:02,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 10:40:02,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:40:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-01-06 10:40:02,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:40:02,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 10:40:02,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911064460] [2021-01-06 10:40:02,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:40:02,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:40:02,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:40:02,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:40:02,318 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 36 states. [2021-01-06 10:40:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:40:02,457 INFO L93 Difference]: Finished difference Result 256 states and 264 transitions. [2021-01-06 10:40:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 10:40:02,463 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2021-01-06 10:40:02,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:40:02,464 INFO L225 Difference]: With dead ends: 256 [2021-01-06 10:40:02,464 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 10:40:02,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:40:02,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 10:40:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-01-06 10:40:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 10:40:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2021-01-06 10:40:02,470 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2021-01-06 10:40:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:40:02,470 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2021-01-06 10:40:02,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:40:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2021-01-06 10:40:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 10:40:02,471 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:40:02,471 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] [2021-01-06 10:40:02,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:40:02,685 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:40:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:40:02,685 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 35 times [2021-01-06 10:40:02,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:40:02,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028948854] [2021-01-06 10:40:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:40:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:40:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-01-06 10:40:03,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028948854] [2021-01-06 10:40:03,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980144245] [2021-01-06 10:40:03,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:30,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-01-06 10:41:30,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:41:30,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:41:30,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:41:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2021-01-06 10:41:31,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:41:31,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2021-01-06 10:41:31,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83707225] [2021-01-06 10:41:31,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:41:31,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:31,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:41:31,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:41:31,050 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 47 states. [2021-01-06 10:41:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:31,494 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2021-01-06 10:41:31,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:41:31,495 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 161 [2021-01-06 10:41:31,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:31,496 INFO L225 Difference]: With dead ends: 267 [2021-01-06 10:41:31,496 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 10:41:31,499 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 [2021-01-06 10:41:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 10:41:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2021-01-06 10:41:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-01-06 10:41:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2021-01-06 10:41:31,504 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 161 [2021-01-06 10:41:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:31,505 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2021-01-06 10:41:31,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:41:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2021-01-06 10:41:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-01-06 10:41:31,506 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:31,506 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] [2021-01-06 10:41:31,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:41:31,720 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:31,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:31,720 INFO L82 PathProgramCache]: Analyzing trace with hash -628416392, now seen corresponding path program 36 times [2021-01-06 10:41:31,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:31,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445974571] [2021-01-06 10:41:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-01-06 10:41:32,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445974571] [2021-01-06 10:41:32,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009835639] [2021-01-06 10:41:32,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:40,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:41:40,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:41:40,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:41:40,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:41:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2021-01-06 10:41:40,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:41:40,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 12] total 47 [2021-01-06 10:41:40,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798290174] [2021-01-06 10:41:40,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:41:40,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:40,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:41:40,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:41:40,668 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 47 states. [2021-01-06 10:41:40,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:40,871 INFO L93 Difference]: Finished difference Result 275 states and 284 transitions. [2021-01-06 10:41:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:41:40,872 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 169 [2021-01-06 10:41:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:40,873 INFO L225 Difference]: With dead ends: 275 [2021-01-06 10:41:40,873 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 10:41:40,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:41:40,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 10:41:40,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2021-01-06 10:41:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2021-01-06 10:41:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2021-01-06 10:41:40,880 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 169 [2021-01-06 10:41:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:40,881 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2021-01-06 10:41:40,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:41:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2021-01-06 10:41:40,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-01-06 10:41:40,882 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:40,882 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:41:41,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:41:41,098 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:41,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:41,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1334735180, now seen corresponding path program 37 times [2021-01-06 10:41:41,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:41,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376591713] [2021-01-06 10:41:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:41:42,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376591713] [2021-01-06 10:41:42,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21821940] [2021-01-06 10:41:42,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:42,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 10:41:42,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:41:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:41:42,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:41:42,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 10:41:42,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397376728] [2021-01-06 10:41:42,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 10:41:42,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:42,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 10:41:42,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:41:42,393 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 39 states. [2021-01-06 10:41:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:42,556 INFO L93 Difference]: Finished difference Result 278 states and 286 transitions. [2021-01-06 10:41:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 10:41:42,556 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 173 [2021-01-06 10:41:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:42,558 INFO L225 Difference]: With dead ends: 278 [2021-01-06 10:41:42,558 INFO L226 Difference]: Without dead ends: 177 [2021-01-06 10:41:42,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:41:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-01-06 10:41:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-01-06 10:41:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 10:41:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2021-01-06 10:41:42,564 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 173 [2021-01-06 10:41:42,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:42,564 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2021-01-06 10:41:42,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 10:41:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2021-01-06 10:41:42,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-01-06 10:41:42,565 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:42,566 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:41:42,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:41:42,780 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:42,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:42,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1357540110, now seen corresponding path program 38 times [2021-01-06 10:41:42,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:42,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508672654] [2021-01-06 10:41:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:41:43,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508672654] [2021-01-06 10:41:43,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001292705] [2021-01-06 10:41:43,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:43,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:41:43,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:41:43,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:41:43,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:41:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:41:44,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:41:44,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 10:41:44,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371382767] [2021-01-06 10:41:44,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:41:44,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:44,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:41:44,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:41:44,178 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand 40 states. [2021-01-06 10:41:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:44,345 INFO L93 Difference]: Finished difference Result 280 states and 288 transitions. [2021-01-06 10:41:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:41:44,346 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 175 [2021-01-06 10:41:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:44,347 INFO L225 Difference]: With dead ends: 280 [2021-01-06 10:41:44,347 INFO L226 Difference]: Without dead ends: 179 [2021-01-06 10:41:44,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:41:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-01-06 10:41:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2021-01-06 10:41:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 10:41:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-01-06 10:41:44,354 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 175 [2021-01-06 10:41:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:44,355 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-01-06 10:41:44,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:41:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-01-06 10:41:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-01-06 10:41:44,356 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:44,356 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:41:44,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:44,572 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:44,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1798241360, now seen corresponding path program 39 times [2021-01-06 10:41:44,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:44,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901243790] [2021-01-06 10:41:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-01-06 10:41:45,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901243790] [2021-01-06 10:41:45,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720403428] [2021-01-06 10:41:45,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:46,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 10:41:46,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:41:46,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:41:46,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:41:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1732 trivial. 0 not checked. [2021-01-06 10:41:47,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:41:47,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 13] total 51 [2021-01-06 10:41:47,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407949365] [2021-01-06 10:41:47,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 10:41:47,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:47,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 10:41:47,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=1693, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 10:41:47,235 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 51 states. [2021-01-06 10:41:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:47,467 INFO L93 Difference]: Finished difference Result 285 states and 294 transitions. [2021-01-06 10:41:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 10:41:47,467 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 177 [2021-01-06 10:41:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:47,468 INFO L225 Difference]: With dead ends: 285 [2021-01-06 10:41:47,469 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 10:41:47,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=857, Invalid=1693, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 10:41:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 10:41:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2021-01-06 10:41:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 10:41:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2021-01-06 10:41:47,477 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 177 [2021-01-06 10:41:47,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:47,479 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2021-01-06 10:41:47,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 10:41:47,479 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2021-01-06 10:41:47,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 10:41:47,481 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:47,482 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:41:47,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 10:41:47,695 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:47,696 INFO L82 PathProgramCache]: Analyzing trace with hash -641145364, now seen corresponding path program 40 times [2021-01-06 10:41:47,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:47,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499059030] [2021-01-06 10:41:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1928 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 10:41:48,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499059030] [2021-01-06 10:41:48,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700641123] [2021-01-06 10:41:48,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:49,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:41:49,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:41:49,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:41:49,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:41:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1928 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1807 trivial. 0 not checked. [2021-01-06 10:41:49,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:41:49,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 14] total 53 [2021-01-06 10:41:49,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971643478] [2021-01-06 10:41:49,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 10:41:49,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:49,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 10:41:49,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=910, Invalid=1846, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:41:49,579 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 53 states. [2021-01-06 10:41:49,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:49,833 INFO L93 Difference]: Finished difference Result 291 states and 300 transitions. [2021-01-06 10:41:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 10:41:49,834 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 181 [2021-01-06 10:41:49,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:49,838 INFO L225 Difference]: With dead ends: 291 [2021-01-06 10:41:49,839 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 10:41:49,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=910, Invalid=1846, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:41:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 10:41:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2021-01-06 10:41:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-01-06 10:41:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2021-01-06 10:41:49,845 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 181 [2021-01-06 10:41:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:49,845 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2021-01-06 10:41:49,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 10:41:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2021-01-06 10:41:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-01-06 10:41:49,846 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:49,847 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:41:50,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:50,053 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:50,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2067850712, now seen corresponding path program 41 times [2021-01-06 10:41:50,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:50,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438530397] [2021-01-06 10:41:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-01-06 10:41:51,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438530397] [2021-01-06 10:41:51,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019214572] [2021-01-06 10:41:51,239 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