/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/reducercommutativity/avg40-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:21:48,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:21:48,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:21:48,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:21:48,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:21:48,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:21:48,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:21:48,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:21:48,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:21:48,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:21:48,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:21:48,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:21:48,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:21:48,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:21:48,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:21:48,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:21:48,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:21:48,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:21:48,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:21:48,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:21:48,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:21:48,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:21:48,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:21:48,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:21:48,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:21:48,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:21:48,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:21:48,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:21:48,849 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:21:48,910 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:21:48,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:21:48,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:21:48,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:21:48,918 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:21:48,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:21:48,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:21:48,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:21:48,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:21:48,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:21:48,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:21:48,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:21:48,922 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:21:48,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:21:48,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:21:48,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:21:48,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:21:48,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:21:48,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:21:48,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:21:48,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:21:48,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:21:48,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:21:48,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:21:48,925 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:21:48,925 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:21:49,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:21:49,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:21:49,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:21:49,528 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:21:49,533 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:21:49,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/avg40-2.i [2020-12-23 00:21:49,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e793bfe6/880154cc635f4c27b8ba3c242982e05a/FLAG2d2c04d4b [2020-12-23 00:21:50,343 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:21:50,344 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg40-2.i [2020-12-23 00:21:50,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e793bfe6/880154cc635f4c27b8ba3c242982e05a/FLAG2d2c04d4b [2020-12-23 00:21:50,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e793bfe6/880154cc635f4c27b8ba3c242982e05a [2020-12-23 00:21:50,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:21:50,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:21:50,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:21:50,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:21:50,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:21:50,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:21:50" (1/1) ... [2020-12-23 00:21:50,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65dabc95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:21:50, skipping insertion in model container [2020-12-23 00:21:50,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:21:50" (1/1) ... [2020-12-23 00:21:50,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:21:50,741 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[39]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:21:51,000 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/reducercommutativity/avg40-2.i[1282,1295] [2020-12-23 00:21:51,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:21:51,016 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[156],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:21:51,045 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/reducercommutativity/avg40-2.i[1282,1295] [2020-12-23 00:21:51,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:21:51,067 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:21:51,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:21:51 WrapperNode [2020-12-23 00:21:51,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:21:51,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:21:51,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:21:51,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:21:51,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:21:51" (1/1) ... [2020-12-23 00:21:51,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:21:51" (1/1) ... [2020-12-23 00:21:51,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:21:51,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:21:51,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:21:51,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:21:51,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:21:51" (1/1) ... [2020-12-23 00:21:51,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:21:51" (1/1) ... [2020-12-23 00:21:51,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:21:51" (1/1) ... [2020-12-23 00:21:51,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:21:51" (1/1) ... [2020-12-23 00:21:51,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:21:51" (1/1) ... [2020-12-23 00:21:51,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:21:51" (1/1) ... [2020-12-23 00:21:51,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:21:51" (1/1) ... [2020-12-23 00:21:51,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:21:51,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:21:51,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:21:51,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:21:51,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:21:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:21:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:21:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:21:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:21:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:21:51,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:21:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:21:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:21:51,869 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:21:51,869 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 00:21:51,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:21:51 BoogieIcfgContainer [2020-12-23 00:21:51,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:21:51,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:21:51,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:21:51,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:21:51,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:21:50" (1/3) ... [2020-12-23 00:21:51,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ef9a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:21:51, skipping insertion in model container [2020-12-23 00:21:51,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:21:51" (2/3) ... [2020-12-23 00:21:51,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ef9a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:21:51, skipping insertion in model container [2020-12-23 00:21:51,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:21:51" (3/3) ... [2020-12-23 00:21:51,886 INFO L111 eAbstractionObserver]: Analyzing ICFG avg40-2.i [2020-12-23 00:21:51,894 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:21:51,901 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:21:51,933 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:21:51,972 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:21:51,972 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:21:51,973 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:21:51,973 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:21:51,973 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:21:51,973 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:21:51,973 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:21:51,974 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:21:51,995 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-23 00:21:52,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:21:52,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:52,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:52,005 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:52,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:52,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2020-12-23 00:21:52,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:52,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512101466] [2020-12-23 00:21:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:21:52,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512101466] [2020-12-23 00:21:52,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:21:52,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:21:52,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529219130] [2020-12-23 00:21:52,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:21:52,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:21:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:21:52,364 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-12-23 00:21:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:52,411 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2020-12-23 00:21:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:21:52,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:21:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:52,428 INFO L225 Difference]: With dead ends: 52 [2020-12-23 00:21:52,428 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 00:21:52,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:21:52,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 00:21:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-23 00:21:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:21:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-23 00:21:52,483 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-12-23 00:21:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:52,484 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-23 00:21:52,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:21:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-23 00:21:52,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:21:52,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:52,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:52,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:21:52,487 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:52,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:52,488 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2020-12-23 00:21:52,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:52,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020568783] [2020-12-23 00:21:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:21:52,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020568783] [2020-12-23 00:21:52,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880528904] [2020-12-23 00:21:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:52,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:21:52,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:21:52,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:21:52,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:21:52,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276610340] [2020-12-23 00:21:52,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:21:52,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:52,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:21:52,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:21:52,905 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2020-12-23 00:21:52,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:52,963 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-23 00:21:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:21:52,964 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:21:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:52,965 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:21:52,965 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 00:21:52,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:21:52,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 00:21:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-12-23 00:21:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:21:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-23 00:21:52,974 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-12-23 00:21:52,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:52,974 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-23 00:21:52,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:21:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-23 00:21:52,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:21:52,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:52,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:53,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:21:53,189 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:53,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:53,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2020-12-23 00:21:53,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:53,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344998470] [2020-12-23 00:21:53,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:21:53,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344998470] [2020-12-23 00:21:53,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684653177] [2020-12-23 00:21:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:53,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:21:53,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:21:53,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:21:53,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:21:53,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757348096] [2020-12-23 00:21:53,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:21:53,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:21:53,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:21:53,407 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2020-12-23 00:21:53,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:53,430 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-23 00:21:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:21:53,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-23 00:21:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:53,433 INFO L225 Difference]: With dead ends: 38 [2020-12-23 00:21:53,434 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:21:53,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:21:53,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:21:53,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-23 00:21:53,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:21:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-23 00:21:53,443 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2020-12-23 00:21:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:53,444 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-23 00:21:53,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:21:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-23 00:21:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:21:53,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:53,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:53,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:53,661 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:53,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:53,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2020-12-23 00:21:53,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:53,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922192229] [2020-12-23 00:21:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:21:53,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922192229] [2020-12-23 00:21:53,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345129876] [2020-12-23 00:21:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:53,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:21:53,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:21:53,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:53,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:21:53,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460257800] [2020-12-23 00:21:53,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:21:53,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:53,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:21:53,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:21:53,985 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-12-23 00:21:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:54,017 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-12-23 00:21:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:21:54,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-23 00:21:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:54,020 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:21:54,020 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:21:54,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:21:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:21:54,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 00:21:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:21:54,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-23 00:21:54,028 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2020-12-23 00:21:54,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:54,028 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-23 00:21:54,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:21:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-23 00:21:54,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:21:54,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:54,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:54,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:54,244 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:54,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2020-12-23 00:21:54,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:54,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691653377] [2020-12-23 00:21:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:21:54,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691653377] [2020-12-23 00:21:54,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073335795] [2020-12-23 00:21:54,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:54,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:21:54,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:54,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:21:54,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:21:54,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:54,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:21:54,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137369388] [2020-12-23 00:21:54,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:21:54,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:54,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:21:54,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:21:54,492 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-12-23 00:21:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:54,587 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-12-23 00:21:54,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:21:54,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-12-23 00:21:54,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:54,589 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:21:54,589 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 00:21:54,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:21:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 00:21:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-12-23 00:21:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:21:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-23 00:21:54,598 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2020-12-23 00:21:54,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:54,598 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-23 00:21:54,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:21:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-23 00:21:54,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 00:21:54,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:54,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:54,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:54,814 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:54,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:54,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2020-12-23 00:21:54,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:54,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537812465] [2020-12-23 00:21:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 00:21:55,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537812465] [2020-12-23 00:21:55,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827006965] [2020-12-23 00:21:55,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:55,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:21:55,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:55,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:21:55,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 00:21:55,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:55,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 00:21:55,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548405781] [2020-12-23 00:21:55,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:21:55,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:55,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:21:55,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:21:55,226 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-12-23 00:21:55,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:55,366 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-12-23 00:21:55,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:21:55,367 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-12-23 00:21:55,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:55,368 INFO L225 Difference]: With dead ends: 81 [2020-12-23 00:21:55,368 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 00:21:55,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:21:55,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 00:21:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-12-23 00:21:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:21:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-12-23 00:21:55,377 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2020-12-23 00:21:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:55,378 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-12-23 00:21:55,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:21:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-12-23 00:21:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:21:55,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:55,380 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:55,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:21:55,594 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:55,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:55,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1892525292, now seen corresponding path program 4 times [2020-12-23 00:21:55,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:55,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731559000] [2020-12-23 00:21:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:21:55,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731559000] [2020-12-23 00:21:55,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265949821] [2020-12-23 00:21:55,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:55,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:21:55,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:55,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:21:55,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:21:55,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:55,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:21:55,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382859724] [2020-12-23 00:21:55,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:21:55,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:55,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:21:55,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:21:55,902 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2020-12-23 00:21:55,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:55,940 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-12-23 00:21:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:21:55,941 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-12-23 00:21:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:55,942 INFO L225 Difference]: With dead ends: 86 [2020-12-23 00:21:55,942 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:21:55,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:21:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:21:55,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 00:21:55,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:21:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-12-23 00:21:55,951 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2020-12-23 00:21:55,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:55,951 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-12-23 00:21:55,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:21:55,952 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-12-23 00:21:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:21:55,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:55,953 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:56,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:56,170 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:56,172 INFO L82 PathProgramCache]: Analyzing trace with hash 704135506, now seen corresponding path program 5 times [2020-12-23 00:21:56,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:56,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169308607] [2020-12-23 00:21:56,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:21:56,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169308607] [2020-12-23 00:21:56,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791450420] [2020-12-23 00:21:56,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:56,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:21:56,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:56,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:21:56,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 00:21:56,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:56,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-23 00:21:56,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297683873] [2020-12-23 00:21:56,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:21:56,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:56,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:21:56,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:21:56,580 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2020-12-23 00:21:56,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:56,757 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2020-12-23 00:21:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:21:56,757 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-12-23 00:21:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:56,761 INFO L225 Difference]: With dead ends: 97 [2020-12-23 00:21:56,764 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:21:56,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:21:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:21:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-12-23 00:21:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:21:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-23 00:21:56,793 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2020-12-23 00:21:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:56,794 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-23 00:21:56,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:21:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-23 00:21:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:21:56,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:56,796 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:56,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:56,997 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:56,999 INFO L82 PathProgramCache]: Analyzing trace with hash -788382450, now seen corresponding path program 6 times [2020-12-23 00:21:57,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:57,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651766194] [2020-12-23 00:21:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-23 00:21:57,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651766194] [2020-12-23 00:21:57,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112768086] [2020-12-23 00:21:57,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:57,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:21:57,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:57,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:21:57,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:21:57,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:57,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-23 00:21:57,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844607065] [2020-12-23 00:21:57,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:21:57,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:57,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:21:57,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:21:57,516 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 11 states. [2020-12-23 00:21:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:57,589 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2020-12-23 00:21:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:21:57,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-12-23 00:21:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:57,591 INFO L225 Difference]: With dead ends: 105 [2020-12-23 00:21:57,591 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 00:21:57,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:21:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 00:21:57,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-12-23 00:21:57,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 00:21:57,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-12-23 00:21:57,599 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2020-12-23 00:21:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:57,599 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-12-23 00:21:57,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:21:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-12-23 00:21:57,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:21:57,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:57,601 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:57,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:21:57,815 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:57,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:57,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1118484150, now seen corresponding path program 7 times [2020-12-23 00:21:57,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:57,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510190509] [2020-12-23 00:21:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:21:57,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510190509] [2020-12-23 00:21:57,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525015330] [2020-12-23 00:21:57,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:58,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:21:58,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:21:58,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:58,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:21:58,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553163489] [2020-12-23 00:21:58,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:21:58,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:58,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:21:58,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:21:58,154 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 10 states. [2020-12-23 00:21:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:58,196 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-12-23 00:21:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:21:58,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-12-23 00:21:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:58,198 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:21:58,198 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 00:21:58,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:21:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 00:21:58,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-23 00:21:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 00:21:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-12-23 00:21:58,205 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2020-12-23 00:21:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:58,206 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-12-23 00:21:58,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:21:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-12-23 00:21:58,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:21:58,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:58,207 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:58,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:58,421 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:58,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 8 times [2020-12-23 00:21:58,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:58,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91781584] [2020-12-23 00:21:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:21:58,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91781584] [2020-12-23 00:21:58,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989997851] [2020-12-23 00:21:58,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:58,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:21:58,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:58,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:21:58,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:21:58,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:58,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:21:58,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478774487] [2020-12-23 00:21:58,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:21:58,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:58,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:21:58,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:21:58,782 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2020-12-23 00:21:58,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:58,825 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-12-23 00:21:58,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:21:58,826 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-12-23 00:21:58,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:58,827 INFO L225 Difference]: With dead ends: 110 [2020-12-23 00:21:58,828 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 00:21:58,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:21:58,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 00:21:58,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-23 00:21:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:21:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-12-23 00:21:58,837 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2020-12-23 00:21:58,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:58,838 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-12-23 00:21:58,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:21:58,838 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-12-23 00:21:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:21:58,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:58,839 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:59,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:59,054 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:59,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:59,056 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 9 times [2020-12-23 00:21:59,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:59,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146313885] [2020-12-23 00:21:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:21:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:21:59,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146313885] [2020-12-23 00:21:59,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972883107] [2020-12-23 00:21:59,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:21:59,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:21:59,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:21:59,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:21:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:21:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-23 00:21:59,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:21:59,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-12-23 00:21:59,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314680035] [2020-12-23 00:21:59,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:21:59,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:21:59,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:21:59,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:21:59,555 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 15 states. [2020-12-23 00:21:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:21:59,643 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-12-23 00:21:59,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:21:59,644 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-12-23 00:21:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:21:59,648 INFO L225 Difference]: With dead ends: 115 [2020-12-23 00:21:59,648 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 00:21:59,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:21:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 00:21:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-12-23 00:21:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 00:21:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-12-23 00:21:59,668 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 63 [2020-12-23 00:21:59,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:21:59,668 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-12-23 00:21:59,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:21:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-12-23 00:21:59,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 00:21:59,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:21:59,673 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:21:59,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 00:21:59,875 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:21:59,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:21:59,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1743137406, now seen corresponding path program 10 times [2020-12-23 00:21:59,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:21:59,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520953865] [2020-12-23 00:21:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:21:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:22:00,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520953865] [2020-12-23 00:22:00,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762369067] [2020-12-23 00:22:00,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:00,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:22:00,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:22:00,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:22:00,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:00,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:22:00,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076904699] [2020-12-23 00:22:00,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:22:00,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:00,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:22:00,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:22:00,244 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 13 states. [2020-12-23 00:22:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:00,295 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-12-23 00:22:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:22:00,296 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-12-23 00:22:00,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:00,297 INFO L225 Difference]: With dead ends: 118 [2020-12-23 00:22:00,297 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 00:22:00,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:22:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 00:22:00,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-23 00:22:00,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 00:22:00,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-12-23 00:22:00,303 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2020-12-23 00:22:00,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:00,303 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-12-23 00:22:00,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:22:00,304 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-12-23 00:22:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:22:00,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:00,305 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:00,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:22:00,521 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:00,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:00,522 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 11 times [2020-12-23 00:22:00,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:00,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292099982] [2020-12-23 00:22:00,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:22:00,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292099982] [2020-12-23 00:22:00,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130495621] [2020-12-23 00:22:00,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:01,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:22:01,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:01,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:22:01,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:22:01,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:01,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:22:01,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881151655] [2020-12-23 00:22:01,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:22:01,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:01,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:22:01,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:22:01,309 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2020-12-23 00:22:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:01,388 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-12-23 00:22:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:22:01,390 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-12-23 00:22:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:01,391 INFO L225 Difference]: With dead ends: 120 [2020-12-23 00:22:01,391 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 00:22:01,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:22:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 00:22:01,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-23 00:22:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 00:22:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-12-23 00:22:01,398 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2020-12-23 00:22:01,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:01,399 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-12-23 00:22:01,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:22:01,399 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-12-23 00:22:01,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:22:01,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:01,400 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:01,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:22:01,617 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:01,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 12 times [2020-12-23 00:22:01,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:01,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462470013] [2020-12-23 00:22:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:22:01,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462470013] [2020-12-23 00:22:01,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127568662] [2020-12-23 00:22:01,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:02,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:22:02,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:02,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:22:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 00:22:02,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:02,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2020-12-23 00:22:02,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106521143] [2020-12-23 00:22:02,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:22:02,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:02,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:22:02,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:22:02,571 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2020-12-23 00:22:02,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:02,700 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2020-12-23 00:22:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:22:02,701 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2020-12-23 00:22:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:02,702 INFO L225 Difference]: With dead ends: 125 [2020-12-23 00:22:02,702 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 00:22:02,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:22:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 00:22:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-12-23 00:22:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:22:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-12-23 00:22:02,707 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2020-12-23 00:22:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:02,708 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-12-23 00:22:02,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:22:02,708 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-12-23 00:22:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:22:02,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:02,709 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:02,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:02,921 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:02,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:02,922 INFO L82 PathProgramCache]: Analyzing trace with hash 970283450, now seen corresponding path program 13 times [2020-12-23 00:22:02,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:02,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635151277] [2020-12-23 00:22:02,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:22:03,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635151277] [2020-12-23 00:22:03,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338358776] [2020-12-23 00:22:03,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:03,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:22:03,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:22:03,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:03,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:22:03,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276119459] [2020-12-23 00:22:03,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:22:03,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:03,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:22:03,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:22:03,409 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 16 states. [2020-12-23 00:22:03,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:03,490 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-12-23 00:22:03,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:22:03,490 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-12-23 00:22:03,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:03,492 INFO L225 Difference]: With dead ends: 128 [2020-12-23 00:22:03,492 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 00:22:03,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:22:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 00:22:03,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-12-23 00:22:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 00:22:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-12-23 00:22:03,501 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2020-12-23 00:22:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:03,501 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-12-23 00:22:03,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:22:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-12-23 00:22:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:22:03,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:03,503 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:03,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:22:03,719 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:03,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 14 times [2020-12-23 00:22:03,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:03,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032151031] [2020-12-23 00:22:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:22:03,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032151031] [2020-12-23 00:22:03,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087572978] [2020-12-23 00:22:03,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:04,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:22:04,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:04,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:22:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:22:04,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:04,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:22:04,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519512350] [2020-12-23 00:22:04,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:22:04,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:04,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:22:04,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:22:04,297 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2020-12-23 00:22:04,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:04,393 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-12-23 00:22:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:22:04,393 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-12-23 00:22:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:04,394 INFO L225 Difference]: With dead ends: 130 [2020-12-23 00:22:04,394 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 00:22:04,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:22:04,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 00:22:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-23 00:22:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 00:22:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-12-23 00:22:04,399 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2020-12-23 00:22:04,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:04,400 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-12-23 00:22:04,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:22:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-12-23 00:22:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 00:22:04,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:04,401 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:04,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:22:04,618 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:04,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:04,619 INFO L82 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 15 times [2020-12-23 00:22:04,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:04,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887649592] [2020-12-23 00:22:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:22:04,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887649592] [2020-12-23 00:22:04,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126485626] [2020-12-23 00:22:04,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:05,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:22:05,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:05,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:22:05,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-23 00:22:05,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:05,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2020-12-23 00:22:05,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109859502] [2020-12-23 00:22:05,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:22:05,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:05,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:22:05,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:22:05,305 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 22 states. [2020-12-23 00:22:05,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:05,550 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2020-12-23 00:22:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:22:05,551 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 79 [2020-12-23 00:22:05,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:05,552 INFO L225 Difference]: With dead ends: 141 [2020-12-23 00:22:05,552 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 00:22:05,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:22:05,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 00:22:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-12-23 00:22:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 00:22:05,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-12-23 00:22:05,558 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2020-12-23 00:22:05,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:05,558 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-12-23 00:22:05,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:22:05,559 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-12-23 00:22:05,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 00:22:05,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:05,560 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:05,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:22:05,774 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:05,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:05,775 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 16 times [2020-12-23 00:22:05,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:05,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504703188] [2020-12-23 00:22:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:22:06,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504703188] [2020-12-23 00:22:06,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723783419] [2020-12-23 00:22:06,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:06,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:22:06,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:06,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:22:06,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:22:06,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:06,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:22:06,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699496644] [2020-12-23 00:22:06,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:22:06,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:06,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:22:06,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:22:06,275 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 19 states. [2020-12-23 00:22:06,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:06,366 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2020-12-23 00:22:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:22:06,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2020-12-23 00:22:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:06,367 INFO L225 Difference]: With dead ends: 146 [2020-12-23 00:22:06,367 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 00:22:06,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:22:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 00:22:06,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-12-23 00:22:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:22:06,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-12-23 00:22:06,373 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2020-12-23 00:22:06,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:06,373 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-12-23 00:22:06,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:22:06,373 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-12-23 00:22:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:22:06,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:06,374 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:06,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:06,588 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2002949072, now seen corresponding path program 17 times [2020-12-23 00:22:06,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:06,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676754445] [2020-12-23 00:22:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:22:06,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676754445] [2020-12-23 00:22:06,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254625817] [2020-12-23 00:22:06,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:07,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 00:22:07,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:07,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:22:07,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:22:07,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:07,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:22:07,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787003697] [2020-12-23 00:22:07,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:22:07,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:07,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:22:07,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:22:07,966 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 20 states. [2020-12-23 00:22:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:08,040 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2020-12-23 00:22:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:22:08,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-12-23 00:22:08,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:08,042 INFO L225 Difference]: With dead ends: 148 [2020-12-23 00:22:08,042 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:22:08,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:22:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:22:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 00:22:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:22:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-12-23 00:22:08,048 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2020-12-23 00:22:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:08,048 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-12-23 00:22:08,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:22:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-12-23 00:22:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 00:22:08,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:08,050 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:08,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:08,266 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:08,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:08,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 18 times [2020-12-23 00:22:08,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:08,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524190597] [2020-12-23 00:22:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:22:08,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524190597] [2020-12-23 00:22:08,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003153536] [2020-12-23 00:22:08,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:09,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 00:22:09,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:09,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:22:09,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-12-23 00:22:09,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:09,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-12-23 00:22:09,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060234714] [2020-12-23 00:22:09,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:22:09,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:09,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:22:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:22:09,520 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 26 states. [2020-12-23 00:22:09,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:09,780 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-12-23 00:22:09,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:22:09,781 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2020-12-23 00:22:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:09,783 INFO L225 Difference]: With dead ends: 159 [2020-12-23 00:22:09,783 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:22:09,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:22:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:22:09,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-12-23 00:22:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 00:22:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-12-23 00:22:09,791 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2020-12-23 00:22:09,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:09,792 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-12-23 00:22:09,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:22:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-12-23 00:22:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 00:22:09,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:09,793 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:10,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:22:10,009 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:10,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1310358570, now seen corresponding path program 19 times [2020-12-23 00:22:10,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:10,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286106731] [2020-12-23 00:22:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:22:10,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286106731] [2020-12-23 00:22:10,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966927180] [2020-12-23 00:22:10,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:10,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:22:10,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:22:10,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:10,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 00:22:10,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89344859] [2020-12-23 00:22:10,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:22:10,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:10,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:22:10,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:22:10,688 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 22 states. [2020-12-23 00:22:10,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:10,792 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2020-12-23 00:22:10,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:22:10,797 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2020-12-23 00:22:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:10,798 INFO L225 Difference]: With dead ends: 164 [2020-12-23 00:22:10,798 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 00:22:10,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:22:10,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 00:22:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-12-23 00:22:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 00:22:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-12-23 00:22:10,804 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2020-12-23 00:22:10,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:10,805 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-12-23 00:22:10,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:22:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-12-23 00:22:10,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:22:10,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:10,806 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:11,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:22:11,021 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:11,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:11,022 INFO L82 PathProgramCache]: Analyzing trace with hash -903575576, now seen corresponding path program 20 times [2020-12-23 00:22:11,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:11,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657919278] [2020-12-23 00:22:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:22:11,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657919278] [2020-12-23 00:22:11,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496272505] [2020-12-23 00:22:11,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:11,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:22:11,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:11,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:22:11,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:22:11,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:11,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:22:11,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591889278] [2020-12-23 00:22:11,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:22:11,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:11,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:22:11,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:22:11,691 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 23 states. [2020-12-23 00:22:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:11,806 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2020-12-23 00:22:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:22:11,806 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2020-12-23 00:22:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:11,807 INFO L225 Difference]: With dead ends: 166 [2020-12-23 00:22:11,807 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 00:22:11,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:22:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 00:22:11,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-12-23 00:22:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 00:22:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-12-23 00:22:11,814 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2020-12-23 00:22:11,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:11,815 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-12-23 00:22:11,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:22:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-12-23 00:22:11,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 00:22:11,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:11,816 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:12,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:12,031 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:12,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1809488934, now seen corresponding path program 21 times [2020-12-23 00:22:12,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:12,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827656179] [2020-12-23 00:22:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:22:12,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827656179] [2020-12-23 00:22:12,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756781733] [2020-12-23 00:22:12,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:12,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:22:12,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:12,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:22:12,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-12-23 00:22:12,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:12,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2020-12-23 00:22:12,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207778768] [2020-12-23 00:22:12,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:22:12,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:12,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:22:12,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:22:12,947 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 29 states. [2020-12-23 00:22:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:13,106 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2020-12-23 00:22:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:22:13,106 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 103 [2020-12-23 00:22:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:13,107 INFO L225 Difference]: With dead ends: 171 [2020-12-23 00:22:13,107 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 00:22:13,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:22:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 00:22:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-12-23 00:22:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 00:22:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-12-23 00:22:13,113 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2020-12-23 00:22:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:13,114 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-12-23 00:22:13,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:22:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-12-23 00:22:13,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 00:22:13,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:13,116 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:13,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 00:22:13,331 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:13,332 INFO L82 PathProgramCache]: Analyzing trace with hash 676687458, now seen corresponding path program 22 times [2020-12-23 00:22:13,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:13,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122418374] [2020-12-23 00:22:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:22:13,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122418374] [2020-12-23 00:22:13,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219503555] [2020-12-23 00:22:13,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:13,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:22:13,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:13,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:22:13,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2020-12-23 00:22:14,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:14,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 31 [2020-12-23 00:22:14,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983793534] [2020-12-23 00:22:14,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:22:14,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:14,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:22:14,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:22:14,218 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 31 states. [2020-12-23 00:22:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:14,353 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2020-12-23 00:22:14,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 00:22:14,354 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 107 [2020-12-23 00:22:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:14,355 INFO L225 Difference]: With dead ends: 177 [2020-12-23 00:22:14,355 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 00:22:14,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:22:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 00:22:14,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-12-23 00:22:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 00:22:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-12-23 00:22:14,361 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2020-12-23 00:22:14,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:14,361 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-12-23 00:22:14,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:22:14,362 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-12-23 00:22:14,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 00:22:14,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:14,363 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:14,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:14,577 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:14,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:14,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1973169506, now seen corresponding path program 23 times [2020-12-23 00:22:14,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:14,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150402388] [2020-12-23 00:22:14,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-12-23 00:22:15,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150402388] [2020-12-23 00:22:15,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557901098] [2020-12-23 00:22:15,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:29,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-23 00:22:29,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:29,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:22:29,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-23 00:22:29,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:29,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2020-12-23 00:22:29,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319001925] [2020-12-23 00:22:29,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:22:29,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:29,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:22:29,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:22:29,573 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 32 states. [2020-12-23 00:22:29,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:29,875 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2020-12-23 00:22:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:22:29,876 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 111 [2020-12-23 00:22:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:29,877 INFO L225 Difference]: With dead ends: 189 [2020-12-23 00:22:29,877 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 00:22:29,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:22:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 00:22:29,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-12-23 00:22:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:22:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-12-23 00:22:29,884 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 111 [2020-12-23 00:22:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:29,885 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-12-23 00:22:29,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:22:29,885 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-12-23 00:22:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 00:22:29,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:29,887 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:30,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:22:30,088 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:30,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:30,089 INFO L82 PathProgramCache]: Analyzing trace with hash 41685082, now seen corresponding path program 24 times [2020-12-23 00:22:30,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:30,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302538866] [2020-12-23 00:22:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 00:22:30,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302538866] [2020-12-23 00:22:30,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999900948] [2020-12-23 00:22:30,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:32,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 00:22:32,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:32,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:22:32,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-23 00:22:33,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:33,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2020-12-23 00:22:33,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76320991] [2020-12-23 00:22:33,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:22:33,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:33,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:22:33,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:22:33,232 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 34 states. [2020-12-23 00:22:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:33,537 INFO L93 Difference]: Finished difference Result 203 states and 214 transitions. [2020-12-23 00:22:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:22:33,539 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 119 [2020-12-23 00:22:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:33,540 INFO L225 Difference]: With dead ends: 203 [2020-12-23 00:22:33,540 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 00:22:33,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:22:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 00:22:33,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2020-12-23 00:22:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 00:22:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-12-23 00:22:33,552 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2020-12-23 00:22:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:33,553 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-12-23 00:22:33,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:22:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-12-23 00:22:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 00:22:33,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:33,555 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:33,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:22:33,769 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:33,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 25 times [2020-12-23 00:22:33,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:33,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350836162] [2020-12-23 00:22:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:22:34,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350836162] [2020-12-23 00:22:34,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272560524] [2020-12-23 00:22:34,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:34,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:22:34,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:22:34,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:34,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 00:22:34,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932386322] [2020-12-23 00:22:34,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:22:34,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:34,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:22:34,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:22:34,786 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2020-12-23 00:22:34,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:34,937 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2020-12-23 00:22:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:22:34,938 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2020-12-23 00:22:34,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:34,939 INFO L225 Difference]: With dead ends: 208 [2020-12-23 00:22:34,940 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 00:22:34,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:22:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 00:22:34,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-12-23 00:22:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 00:22:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-12-23 00:22:34,947 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2020-12-23 00:22:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:34,948 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-12-23 00:22:34,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:22:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-12-23 00:22:34,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-23 00:22:34,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:34,950 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:35,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:22:35,155 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 26 times [2020-12-23 00:22:35,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:35,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128861948] [2020-12-23 00:22:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:22:35,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128861948] [2020-12-23 00:22:35,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272047934] [2020-12-23 00:22:35,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:36,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:22:36,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:36,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:22:36,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:22:36,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:36,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 00:22:36,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749228401] [2020-12-23 00:22:36,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:22:36,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:36,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:22:36,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:22:36,210 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 29 states. [2020-12-23 00:22:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:36,342 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2020-12-23 00:22:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:22:36,343 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2020-12-23 00:22:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:36,345 INFO L225 Difference]: With dead ends: 210 [2020-12-23 00:22:36,345 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 00:22:36,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:22:36,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 00:22:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-12-23 00:22:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 00:22:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2020-12-23 00:22:36,355 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2020-12-23 00:22:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:36,355 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2020-12-23 00:22:36,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:22:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2020-12-23 00:22:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 00:22:36,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:36,357 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:36,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:22:36,573 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:36,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:36,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1805967086, now seen corresponding path program 27 times [2020-12-23 00:22:36,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:36,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829924074] [2020-12-23 00:22:36,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:22:37,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829924074] [2020-12-23 00:22:37,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731501411] [2020-12-23 00:22:37,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:38,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:22:38,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:38,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:22:38,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2020-12-23 00:22:38,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:38,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2020-12-23 00:22:38,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713365229] [2020-12-23 00:22:38,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:22:38,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:22:38,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:22:38,655 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 37 states. [2020-12-23 00:22:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:38,908 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2020-12-23 00:22:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:22:38,908 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 131 [2020-12-23 00:22:38,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:38,910 INFO L225 Difference]: With dead ends: 215 [2020-12-23 00:22:38,910 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 00:22:38,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:22:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 00:22:38,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-12-23 00:22:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 00:22:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2020-12-23 00:22:38,917 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 131 [2020-12-23 00:22:38,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:38,917 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2020-12-23 00:22:38,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:22:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2020-12-23 00:22:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 00:22:38,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:38,919 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:39,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:39,134 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:39,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:39,135 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 28 times [2020-12-23 00:22:39,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:39,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205559758] [2020-12-23 00:22:39,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:22:39,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205559758] [2020-12-23 00:22:39,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521944353] [2020-12-23 00:22:39,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:40,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:22:40,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:40,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:22:40,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:22:40,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:40,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 00:22:40,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278866763] [2020-12-23 00:22:40,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:22:40,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:40,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:22:40,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:22:40,188 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 31 states. [2020-12-23 00:22:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:40,343 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2020-12-23 00:22:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:22:40,344 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 135 [2020-12-23 00:22:40,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:40,345 INFO L225 Difference]: With dead ends: 218 [2020-12-23 00:22:40,346 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 00:22:40,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:22:40,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 00:22:40,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-12-23 00:22:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 00:22:40,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-12-23 00:22:40,353 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2020-12-23 00:22:40,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:40,353 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-12-23 00:22:40,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:22:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-12-23 00:22:40,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-23 00:22:40,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:40,355 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:40,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:40,569 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:40,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1428315124, now seen corresponding path program 29 times [2020-12-23 00:22:40,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:40,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267484171] [2020-12-23 00:22:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:22:41,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267484171] [2020-12-23 00:22:41,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066139376] [2020-12-23 00:22:41,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:45,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-23 00:22:45,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:45,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:22:45,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2020-12-23 00:22:45,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:45,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2020-12-23 00:22:45,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030739480] [2020-12-23 00:22:45,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:22:45,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:45,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:22:45,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:22:45,810 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 40 states. [2020-12-23 00:22:46,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:46,095 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2020-12-23 00:22:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:22:46,095 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 137 [2020-12-23 00:22:46,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:46,097 INFO L225 Difference]: With dead ends: 223 [2020-12-23 00:22:46,097 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 00:22:46,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:22:46,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 00:22:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-12-23 00:22:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 00:22:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-12-23 00:22:46,105 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 137 [2020-12-23 00:22:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:46,105 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-12-23 00:22:46,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:22:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-12-23 00:22:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-23 00:22:46,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:46,107 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:46,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:46,322 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:46,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:46,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1798907208, now seen corresponding path program 30 times [2020-12-23 00:22:46,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:46,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570635000] [2020-12-23 00:22:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-12-23 00:22:47,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570635000] [2020-12-23 00:22:47,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701022065] [2020-12-23 00:22:47,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:52,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 00:22:52,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:52,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:22:52,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 57 proven. 64 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2020-12-23 00:22:53,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:53,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 13] total 43 [2020-12-23 00:22:53,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649884658] [2020-12-23 00:22:53,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:22:53,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:53,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:22:53,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=1191, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:22:53,046 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 43 states. [2020-12-23 00:22:53,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:53,940 INFO L93 Difference]: Finished difference Result 236 states and 248 transitions. [2020-12-23 00:22:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 00:22:53,941 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 141 [2020-12-23 00:22:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:53,944 INFO L225 Difference]: With dead ends: 236 [2020-12-23 00:22:53,944 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 00:22:53,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=723, Invalid=1929, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:22:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 00:22:53,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-12-23 00:22:53,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 00:22:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-12-23 00:22:53,954 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 141 [2020-12-23 00:22:53,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:53,954 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-12-23 00:22:53,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:22:53,954 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-12-23 00:22:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-23 00:22:53,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:53,956 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:54,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:22:54,158 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:54,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:54,159 INFO L82 PathProgramCache]: Analyzing trace with hash -747071166, now seen corresponding path program 31 times [2020-12-23 00:22:54,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:54,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496782498] [2020-12-23 00:22:54,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:22:55,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496782498] [2020-12-23 00:22:55,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855347634] [2020-12-23 00:22:55,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:55,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:22:55,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:22:55,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:55,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 00:22:55,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448936414] [2020-12-23 00:22:55,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:22:55,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:55,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:22:55,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:22:55,464 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 35 states. [2020-12-23 00:22:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:55,679 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2020-12-23 00:22:55,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:22:55,679 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 151 [2020-12-23 00:22:55,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:55,681 INFO L225 Difference]: With dead ends: 242 [2020-12-23 00:22:55,681 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 00:22:55,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:22:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 00:22:55,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-12-23 00:22:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 00:22:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2020-12-23 00:22:55,690 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2020-12-23 00:22:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:55,691 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2020-12-23 00:22:55,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:22:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2020-12-23 00:22:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-23 00:22:55,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:55,693 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:55,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:55,907 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:55,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1783438848, now seen corresponding path program 32 times [2020-12-23 00:22:55,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:55,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932107707] [2020-12-23 00:22:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:22:57,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932107707] [2020-12-23 00:22:57,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792513461] [2020-12-23 00:22:57,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:57,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:22:57,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:57,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 00:22:57,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:22:57,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:57,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 00:22:57,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079921205] [2020-12-23 00:22:57,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 00:22:57,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:57,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 00:22:57,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:22:57,525 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 36 states. [2020-12-23 00:22:57,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:57,737 INFO L93 Difference]: Finished difference Result 244 states and 252 transitions. [2020-12-23 00:22:57,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 00:22:57,738 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 153 [2020-12-23 00:22:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:57,740 INFO L225 Difference]: With dead ends: 244 [2020-12-23 00:22:57,740 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 00:22:57,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:22:57,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 00:22:57,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-12-23 00:22:57,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-12-23 00:22:57,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2020-12-23 00:22:57,750 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 153 [2020-12-23 00:22:57,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:57,751 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2020-12-23 00:22:57,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 00:22:57,751 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2020-12-23 00:22:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-23 00:22:57,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:57,753 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:57,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:22:57,967 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:57,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:57,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1300368578, now seen corresponding path program 33 times [2020-12-23 00:22:57,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:57,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818687838] [2020-12-23 00:22:57,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:22:59,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818687838] [2020-12-23 00:22:59,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233441221] [2020-12-23 00:22:59,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:23:00,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:23:00,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:23:00,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:23:00,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:23:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 65 proven. 81 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2020-12-23 00:23:01,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:23:01,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 14] total 48 [2020-12-23 00:23:01,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396733227] [2020-12-23 00:23:01,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 00:23:01,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:23:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 00:23:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:23:01,228 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 48 states. [2020-12-23 00:23:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:23:02,278 INFO L93 Difference]: Finished difference Result 256 states and 268 transitions. [2020-12-23 00:23:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 00:23:02,279 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 155 [2020-12-23 00:23:02,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:23:02,281 INFO L225 Difference]: With dead ends: 256 [2020-12-23 00:23:02,281 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 00:23:02,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=898, Invalid=2408, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 00:23:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 00:23:02,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2020-12-23 00:23:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-23 00:23:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2020-12-23 00:23:02,292 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 155 [2020-12-23 00:23:02,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:23:02,293 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2020-12-23 00:23:02,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 00:23:02,293 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2020-12-23 00:23:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-23 00:23:02,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:23:02,294 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:23:02,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:23:02,495 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:23:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:23:02,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1127903816, now seen corresponding path program 34 times [2020-12-23 00:23:02,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:23:02,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709175156] [2020-12-23 00:23:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:23:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:23:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-12-23 00:23:03,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709175156] [2020-12-23 00:23:03,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436089168] [2020-12-23 00:23:03,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:23:03,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:23:03,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:23:03,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:23:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:23:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1506 trivial. 0 not checked. [2020-12-23 00:23:04,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:23:04,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 13] total 49 [2020-12-23 00:23:04,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209418149] [2020-12-23 00:23:04,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 00:23:04,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:23:04,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 00:23:04,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=1572, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:23:04,463 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand 49 states. [2020-12-23 00:23:05,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:23:05,064 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2020-12-23 00:23:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 00:23:05,065 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 165 [2020-12-23 00:23:05,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:23:05,067 INFO L225 Difference]: With dead ends: 271 [2020-12-23 00:23:05,067 INFO L226 Difference]: Without dead ends: 178 [2020-12-23 00:23:05,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=780, Invalid=1572, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:23:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-23 00:23:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-12-23 00:23:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 00:23:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2020-12-23 00:23:05,076 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 165 [2020-12-23 00:23:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:23:05,076 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2020-12-23 00:23:05,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 00:23:05,076 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2020-12-23 00:23:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-23 00:23:05,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:23:05,078 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:23:05,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:23:05,284 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:23:05,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:23:05,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1845202060, now seen corresponding path program 35 times [2020-12-23 00:23:05,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:23:05,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926791664] [2020-12-23 00:23:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:23:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:23:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2020-12-23 00:23:06,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926791664] [2020-12-23 00:23:06,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148615675] [2020-12-23 00:23:06,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:48,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-23 00:25:48,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:48,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:25:48,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1619 trivial. 0 not checked. [2020-12-23 00:25:48,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:48,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 14] total 51 [2020-12-23 00:25:49,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002018619] [2020-12-23 00:25:49,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 00:25:49,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:49,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 00:25:49,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=1719, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 00:25:49,002 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 51 states. [2020-12-23 00:25:49,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:49,508 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2020-12-23 00:25:49,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 00:25:49,509 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 173 [2020-12-23 00:25:49,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:49,510 INFO L225 Difference]: With dead ends: 285 [2020-12-23 00:25:49,511 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 00:25:49,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=831, Invalid=1719, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 00:25:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 00:25:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2020-12-23 00:25:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 00:25:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2020-12-23 00:25:49,522 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 173 [2020-12-23 00:25:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:49,522 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2020-12-23 00:25:49,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 00:25:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2020-12-23 00:25:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-23 00:25:49,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:49,524 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 12, 12, 12, 12, 12, 12, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:49,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:25:49,724 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:49,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2033983024, now seen corresponding path program 36 times [2020-12-23 00:25:49,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:49,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494622576] [2020-12-23 00:25:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1882 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2020-12-23 00:25:50,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494622576] [2020-12-23 00:25:50,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370634068] [2020-12-23 00:25:50,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:54,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 00:25:54,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:54,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:25:54,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1882 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1801 trivial. 0 not checked. [2020-12-23 00:25:54,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:54,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 12] total 50 [2020-12-23 00:25:54,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252528290] [2020-12-23 00:25:54,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 00:25:54,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:54,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 00:25:54,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=1605, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 00:25:54,909 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 50 states. [2020-12-23 00:25:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:55,152 INFO L93 Difference]: Finished difference Result 293 states and 302 transitions. [2020-12-23 00:25:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 00:25:55,152 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 181 [2020-12-23 00:25:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:55,154 INFO L225 Difference]: With dead ends: 293 [2020-12-23 00:25:55,154 INFO L226 Difference]: Without dead ends: 188 [2020-12-23 00:25:55,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=845, Invalid=1605, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 00:25:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-23 00:25:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-12-23 00:25:55,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 00:25:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2020-12-23 00:25:55,163 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 181 [2020-12-23 00:25:55,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:55,163 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2020-12-23 00:25:55,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 00:25:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2020-12-23 00:25:55,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-23 00:25:55,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:55,165 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:55,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:25:55,379 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:55,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:55,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1878147436, now seen corresponding path program 37 times [2020-12-23 00:25:55,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:55,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226773458] [2020-12-23 00:25:55,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:25:56,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226773458] [2020-12-23 00:25:56,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794081583] [2020-12-23 00:25:56,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:56,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 00:25:56,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:25:56,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:56,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 00:25:56,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227609769] [2020-12-23 00:25:56,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 00:25:56,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:56,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 00:25:56,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:25:56,925 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 42 states. [2020-12-23 00:25:57,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:57,092 INFO L93 Difference]: Finished difference Result 296 states and 304 transitions. [2020-12-23 00:25:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 00:25:57,092 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 185 [2020-12-23 00:25:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:57,097 INFO L225 Difference]: With dead ends: 296 [2020-12-23 00:25:57,097 INFO L226 Difference]: Without dead ends: 189 [2020-12-23 00:25:57,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:25:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-23 00:25:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-12-23 00:25:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-23 00:25:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2020-12-23 00:25:57,104 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 185 [2020-12-23 00:25:57,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:57,104 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2020-12-23 00:25:57,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 00:25:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2020-12-23 00:25:57,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-12-23 00:25:57,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:57,106 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:57,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:25:57,315 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:57,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:57,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1853414058, now seen corresponding path program 38 times [2020-12-23 00:25:57,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:57,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900083730] [2020-12-23 00:25:57,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:25:58,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900083730] [2020-12-23 00:25:58,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009928082] [2020-12-23 00:25:58,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:58,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:58,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:58,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:25:58,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:25:58,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:58,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 00:25:58,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918684336] [2020-12-23 00:25:58,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:25:58,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:58,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:25:58,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:25:58,813 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 43 states. [2020-12-23 00:25:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:58,986 INFO L93 Difference]: Finished difference Result 297 states and 305 transitions. [2020-12-23 00:25:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:25:58,986 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 187 [2020-12-23 00:25:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:58,987 INFO L225 Difference]: With dead ends: 297 [2020-12-23 00:25:58,987 INFO L226 Difference]: Without dead ends: 190 [2020-12-23 00:25:58,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:25:58,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-23 00:25:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-12-23 00:25:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-23 00:25:58,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2020-12-23 00:25:58,994 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 187 [2020-12-23 00:25:58,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:58,995 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2020-12-23 00:25:58,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:25:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2020-12-23 00:25:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-12-23 00:25:58,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:58,996 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:59,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:59,210 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:59,210 INFO L82 PathProgramCache]: Analyzing trace with hash -440525720, now seen corresponding path program 39 times [2020-12-23 00:25:59,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:59,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071233942] [2020-12-23 00:25:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1988 trivial. 0 not checked. [2020-12-23 00:25:59,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071233942] [2020-12-23 00:25:59,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364767156] [2020-12-23 00:25:59,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:00,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 00:26:00,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:00,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:26:00,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2020-12-23 00:26:01,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:01,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2020-12-23 00:26:01,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947094759] [2020-12-23 00:26:01,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:26:01,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:01,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:26:01,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:26:01,329 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 26 states. [2020-12-23 00:26:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:01,551 INFO L93 Difference]: Finished difference Result 283 states and 293 transitions. [2020-12-23 00:26:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:26:01,551 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 189 [2020-12-23 00:26:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:01,552 INFO L225 Difference]: With dead ends: 283 [2020-12-23 00:26:01,553 INFO L226 Difference]: Without dead ends: 202 [2020-12-23 00:26:01,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:26:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-23 00:26:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-12-23 00:26:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 00:26:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2020-12-23 00:26:01,560 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 189 [2020-12-23 00:26:01,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:01,560 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2020-12-23 00:26:01,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:26:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2020-12-23 00:26:01,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-12-23 00:26:01,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:01,562 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:01,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 00:26:01,776 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:01,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:01,776 INFO L82 PathProgramCache]: Analyzing trace with hash -551351196, now seen corresponding path program 40 times [2020-12-23 00:26:01,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:01,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443825156] [2020-12-23 00:26:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2228 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2020-12-23 00:26:02,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443825156] [2020-12-23 00:26:02,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411888745] [2020-12-23 00:26:02,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:02,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:02,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:02,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:26:02,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2228 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2020-12-23 00:26:02,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:02,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-12-23 00:26:02,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951311503] [2020-12-23 00:26:02,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:26:02,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:26:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:26:02,627 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand 28 states. [2020-12-23 00:26:02,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:02,943 INFO L93 Difference]: Finished difference Result 297 states and 307 transitions. [2020-12-23 00:26:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:26:02,944 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 197 [2020-12-23 00:26:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:02,946 INFO L225 Difference]: With dead ends: 297 [2020-12-23 00:26:02,946 INFO L226 Difference]: Without dead ends: 210 [2020-12-23 00:26:02,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:26:02,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-23 00:26:02,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2020-12-23 00:26:02,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-23 00:26:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2020-12-23 00:26:02,954 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 197 [2020-12-23 00:26:02,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:02,955 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2020-12-23 00:26:02,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:26:02,955 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2020-12-23 00:26:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-12-23 00:26:02,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:02,957 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 14, 14, 14, 14, 14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:03,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:03,171 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:03,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:03,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1245442208, now seen corresponding path program 41 times [2020-12-23 00:26:03,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:03,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997047059] [2020-12-23 00:26:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2332 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2136 trivial. 0 not checked. [2020-12-23 00:26:03,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997047059] [2020-12-23 00:26:03,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157299295] [2020-12-23 00:26:03,423 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