/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-crafted/mapsum4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:37:50,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:37:50,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:37:50,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:37:50,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:37:50,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:37:50,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:37:50,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:37:50,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:37:50,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:37:50,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:37:50,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:37:50,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:37:50,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:37:50,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:37:50,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:37:50,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:37:50,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:37:50,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:37:50,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:37:50,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:37:50,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:37:50,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:37:50,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:37:50,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:37:50,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:37:50,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:37:50,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:37:50,290 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:37:50,342 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:37:50,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:37:50,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:37:50,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:37:50,349 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:37:50,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:37:50,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:37:50,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:37:50,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:37:50,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:37:50,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:37:50,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:37:50,352 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:37:50,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:37:50,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:37:50,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:37:50,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:37:50,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:37:50,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:37:50,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:37:50,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:37:50,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:37:50,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:37:50,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:37:50,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:37:50,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:37:50,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:37:50,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:37:50,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:37:50,805 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:37:50,806 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:37:50,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapsum4.i [2021-01-06 10:37:50,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2c3d5fdc0/a4aed9b9abc649f1bf2bffd05361e8bb/FLAGa9d8e8368 [2021-01-06 10:37:51,444 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:37:51,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum4.i [2021-01-06 10:37:51,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2c3d5fdc0/a4aed9b9abc649f1bf2bffd05361e8bb/FLAGa9d8e8368 [2021-01-06 10:37:51,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2c3d5fdc0/a4aed9b9abc649f1bf2bffd05361e8bb [2021-01-06 10:37:51,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:37:51,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:37:51,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:37:51,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:37:51,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:37:51,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:37:51" (1/1) ... [2021-01-06 10:37:51,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3346a95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:51, skipping insertion in model container [2021-01-06 10:37:51,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:37:51" (1/1) ... [2021-01-06 10:37:51,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:37:51,848 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[99999]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:37:52,076 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum4.i[1318,1331] [2021-01-06 10:37:52,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:37:52,092 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[399996],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:37:52,117 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum4.i[1318,1331] [2021-01-06 10:37:52,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:37:52,137 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:37:52,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:52 WrapperNode [2021-01-06 10:37:52,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:37:52,139 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:37:52,139 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:37:52,139 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:37:52,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:52" (1/1) ... [2021-01-06 10:37:52,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:52" (1/1) ... [2021-01-06 10:37:52,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:37:52,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:37:52,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:37:52,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:37:52,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:52" (1/1) ... [2021-01-06 10:37:52,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:52" (1/1) ... [2021-01-06 10:37:52,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:52" (1/1) ... [2021-01-06 10:37:52,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:52" (1/1) ... [2021-01-06 10:37:52,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:52" (1/1) ... [2021-01-06 10:37:52,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:52" (1/1) ... [2021-01-06 10:37:52,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:52" (1/1) ... [2021-01-06 10:37:52,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:37:52,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:37:52,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:37:52,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:37:52,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:37:52,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:37:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:37:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:37:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:37:52,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:37:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:37:52,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:37:52,676 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:37:52,677 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 10:37:52,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:37:52 BoogieIcfgContainer [2021-01-06 10:37:52,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:37:52,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:37:52,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:37:52,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:37:52,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:37:51" (1/3) ... [2021-01-06 10:37:52,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@547727cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:37:52, skipping insertion in model container [2021-01-06 10:37:52,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:52" (2/3) ... [2021-01-06 10:37:52,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@547727cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:37:52, skipping insertion in model container [2021-01-06 10:37:52,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:37:52" (3/3) ... [2021-01-06 10:37:52,690 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum4.i [2021-01-06 10:37:52,699 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:37:52,704 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:37:52,740 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:37:52,793 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:37:52,795 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:37:52,795 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:37:52,795 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:37:52,795 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:37:52,795 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:37:52,795 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:37:52,796 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:37:52,812 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-01-06 10:37:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:37:52,817 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:52,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:52,818 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:52,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:52,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2021-01-06 10:37:52,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:52,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818201903] [2021-01-06 10:37:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:37:53,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818201903] [2021-01-06 10:37:53,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:37:53,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:37:53,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888357184] [2021-01-06 10:37:53,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:37:53,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:53,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:37:53,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:37:53,071 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2021-01-06 10:37:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:53,112 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 10:37:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:37:53,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 10:37:53,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:53,125 INFO L225 Difference]: With dead ends: 52 [2021-01-06 10:37:53,125 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 10:37:53,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:37:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 10:37:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-01-06 10:37:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:37:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 10:37:53,172 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-01-06 10:37:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:53,173 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 10:37:53,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:37:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 10:37:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:37:53,174 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:53,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:53,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:37:53,175 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:53,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:53,176 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2021-01-06 10:37:53,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:53,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544357804] [2021-01-06 10:37:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:37:53,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544357804] [2021-01-06 10:37:53,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846681824] [2021-01-06 10:37:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:53,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:37:53,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:37:53,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:37:53,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:37:53,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053721319] [2021-01-06 10:37:53,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:37:53,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:53,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:37:53,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:37:53,535 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2021-01-06 10:37:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:53,639 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 10:37:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:37:53,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:37:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:53,643 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:37:53,644 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 10:37:53,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:37:53,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 10:37:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-01-06 10:37:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:37:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-01-06 10:37:53,662 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-01-06 10:37:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:53,663 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-01-06 10:37:53,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:37:53,664 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-01-06 10:37:53,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:37:53,665 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:53,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:53,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:37:53,880 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:53,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:53,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2021-01-06 10:37:53,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:53,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593439450] [2021-01-06 10:37:53,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:37:53,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593439450] [2021-01-06 10:37:53,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161160469] [2021-01-06 10:37:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:54,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:37:54,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:37:54,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:37:54,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:37:54,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036590496] [2021-01-06 10:37:54,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:37:54,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:54,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:37:54,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:37:54,094 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2021-01-06 10:37:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:54,118 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-01-06 10:37:54,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:37:54,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-01-06 10:37:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:54,123 INFO L225 Difference]: With dead ends: 38 [2021-01-06 10:37:54,124 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:37:54,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:37:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:37:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-01-06 10:37:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:37:54,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-01-06 10:37:54,142 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-01-06 10:37:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:54,143 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-01-06 10:37:54,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:37:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-01-06 10:37:54,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:37:54,145 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:54,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:54,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:54,359 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:54,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2021-01-06 10:37:54,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:54,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53188686] [2021-01-06 10:37:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:37:54,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53188686] [2021-01-06 10:37:54,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846487671] [2021-01-06 10:37:54,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:54,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:37:54,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:37:54,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:54,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:37:54,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652446932] [2021-01-06 10:37:54,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:37:54,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:54,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:37:54,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:37:54,665 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2021-01-06 10:37:54,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:54,693 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-01-06 10:37:54,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:37:54,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2021-01-06 10:37:54,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:54,695 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:37:54,695 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:37:54,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:37:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:37:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 10:37:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:37:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-06 10:37:54,702 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2021-01-06 10:37:54,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:54,702 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-06 10:37:54,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:37:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-06 10:37:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:37:54,704 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:54,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:54,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:54,918 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2021-01-06 10:37:54,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:54,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931915393] [2021-01-06 10:37:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:37:54,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931915393] [2021-01-06 10:37:54,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611549328] [2021-01-06 10:37:54,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:55,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:37:55,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:37:55,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:37:55,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:55,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:37:55,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606488445] [2021-01-06 10:37:55,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:37:55,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:55,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:37:55,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:37:55,153 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2021-01-06 10:37:55,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:55,249 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-01-06 10:37:55,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:37:55,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2021-01-06 10:37:55,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:55,251 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:37:55,251 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 10:37:55,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:37:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 10:37:55,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-01-06 10:37:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:37:55,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 10:37:55,261 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-01-06 10:37:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:55,261 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 10:37:55,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:37:55,261 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 10:37:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 10:37:55,262 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:55,263 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:55,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:55,465 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:55,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:55,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2021-01-06 10:37:55,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:55,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705590034] [2021-01-06 10:37:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:37:55,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705590034] [2021-01-06 10:37:55,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631177498] [2021-01-06 10:37:55,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:55,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:37:55,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:55,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:37:55,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:37:55,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:55,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 10:37:55,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104969531] [2021-01-06 10:37:55,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:37:55,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:55,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:37:55,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:37:55,856 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2021-01-06 10:37:56,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:56,004 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-01-06 10:37:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:37:56,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2021-01-06 10:37:56,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:56,006 INFO L225 Difference]: With dead ends: 81 [2021-01-06 10:37:56,006 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 10:37:56,009 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 [2021-01-06 10:37:56,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 10:37:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-01-06 10:37:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 10:37:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-01-06 10:37:56,029 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2021-01-06 10:37:56,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:56,030 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-01-06 10:37:56,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:37:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-01-06 10:37:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:37:56,033 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:56,033 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] [2021-01-06 10:37:56,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:37:56,247 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:56,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1892525292, now seen corresponding path program 4 times [2021-01-06 10:37:56,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:56,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390103910] [2021-01-06 10:37:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:37:56,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390103910] [2021-01-06 10:37:56,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822953955] [2021-01-06 10:37:56,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:56,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:37:56,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:56,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:37:56,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:37:56,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:56,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:37:56,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257592556] [2021-01-06 10:37:56,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:37:56,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:56,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:37:56,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:37:56,554 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2021-01-06 10:37:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:56,578 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-01-06 10:37:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:37:56,579 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2021-01-06 10:37:56,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:56,579 INFO L225 Difference]: With dead ends: 86 [2021-01-06 10:37:56,579 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 10:37:56,580 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 [2021-01-06 10:37:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 10:37:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-01-06 10:37:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:37:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-01-06 10:37:56,585 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2021-01-06 10:37:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:56,586 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-01-06 10:37:56,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:37:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-01-06 10:37:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:37:56,587 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:56,587 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] [2021-01-06 10:37:56,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:56,803 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:56,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:56,804 INFO L82 PathProgramCache]: Analyzing trace with hash 704135506, now seen corresponding path program 5 times [2021-01-06 10:37:56,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:56,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157813042] [2021-01-06 10:37:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:37:56,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157813042] [2021-01-06 10:37:56,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117142456] [2021-01-06 10:37:56,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:56,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:37:56,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:56,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:37:56,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 10:37:57,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:57,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-01-06 10:37:57,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920215386] [2021-01-06 10:37:57,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:37:57,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:57,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:37:57,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:37:57,073 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2021-01-06 10:37:57,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:57,169 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2021-01-06 10:37:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:37:57,169 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2021-01-06 10:37:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:57,170 INFO L225 Difference]: With dead ends: 97 [2021-01-06 10:37:57,170 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 10:37:57,171 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 [2021-01-06 10:37:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 10:37:57,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-01-06 10:37:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:37:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-01-06 10:37:57,177 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2021-01-06 10:37:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:57,177 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-01-06 10:37:57,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:37:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-01-06 10:37:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:37:57,179 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:57,179 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] [2021-01-06 10:37:57,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:57,394 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:57,396 INFO L82 PathProgramCache]: Analyzing trace with hash -788382450, now seen corresponding path program 6 times [2021-01-06 10:37:57,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:57,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321345596] [2021-01-06 10:37:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 10:37:57,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321345596] [2021-01-06 10:37:57,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786910073] [2021-01-06 10:37:57,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:57,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:37:57,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:57,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:37:57,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:37:57,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:57,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-01-06 10:37:57,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942718696] [2021-01-06 10:37:57,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:37:57,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:57,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:37:57,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:37:57,827 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 11 states. [2021-01-06 10:37:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:57,881 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-01-06 10:37:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:37:57,882 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2021-01-06 10:37:57,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:57,885 INFO L225 Difference]: With dead ends: 105 [2021-01-06 10:37:57,885 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 10:37:57,886 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 [2021-01-06 10:37:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 10:37:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-01-06 10:37:57,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 10:37:57,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-01-06 10:37:57,898 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2021-01-06 10:37:57,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:57,900 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-01-06 10:37:57,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:37:57,900 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-01-06 10:37:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 10:37:57,902 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:57,902 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] [2021-01-06 10:37:58,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:37:58,118 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:58,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1118484150, now seen corresponding path program 7 times [2021-01-06 10:37:58,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:58,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086357673] [2021-01-06 10:37:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:37:58,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086357673] [2021-01-06 10:37:58,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758061765] [2021-01-06 10:37:58,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:58,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:37:58,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:58,352 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:37:58,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:58,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:37:58,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696609594] [2021-01-06 10:37:58,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:37:58,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:58,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:37:58,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:37:58,355 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 10 states. [2021-01-06 10:37:58,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:58,386 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-01-06 10:37:58,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:37:58,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2021-01-06 10:37:58,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:58,388 INFO L225 Difference]: With dead ends: 108 [2021-01-06 10:37:58,388 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 10:37:58,389 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 [2021-01-06 10:37:58,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 10:37:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-01-06 10:37:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 10:37:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-01-06 10:37:58,394 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2021-01-06 10:37:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:58,394 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-01-06 10:37:58,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:37:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-01-06 10:37:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:37:58,396 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:58,396 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] [2021-01-06 10:37:58,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:58,612 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:58,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:58,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 8 times [2021-01-06 10:37:58,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:58,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131280383] [2021-01-06 10:37:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:37:58,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131280383] [2021-01-06 10:37:58,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485387011] [2021-01-06 10:37:58,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:58,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:37:58,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:58,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:37:58,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:37:58,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:58,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:37:58,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143739387] [2021-01-06 10:37:58,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:37:58,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:58,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:37:58,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:37:58,893 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2021-01-06 10:37:58,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:58,923 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2021-01-06 10:37:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:37:58,924 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2021-01-06 10:37:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:58,925 INFO L225 Difference]: With dead ends: 110 [2021-01-06 10:37:58,925 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 10:37:58,926 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 [2021-01-06 10:37:58,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 10:37:58,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-01-06 10:37:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:37:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-01-06 10:37:58,931 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2021-01-06 10:37:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:58,931 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-01-06 10:37:58,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:37:58,932 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-01-06 10:37:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:37:58,932 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:58,933 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] [2021-01-06 10:37:59,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:59,138 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:59,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:59,139 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 9 times [2021-01-06 10:37:59,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:59,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046156520] [2021-01-06 10:37:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:37:59,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046156520] [2021-01-06 10:37:59,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745900346] [2021-01-06 10:37:59,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:59,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:37:59,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:59,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:37:59,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-01-06 10:37:59,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:59,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-01-06 10:37:59,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32359424] [2021-01-06 10:37:59,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:37:59,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:59,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:37:59,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:37:59,421 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 15 states. [2021-01-06 10:37:59,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:59,539 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-01-06 10:37:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:37:59,539 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2021-01-06 10:37:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:59,540 INFO L225 Difference]: With dead ends: 115 [2021-01-06 10:37:59,540 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 10:37:59,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:37:59,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 10:37:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-01-06 10:37:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:37:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-01-06 10:37:59,548 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 63 [2021-01-06 10:37:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:59,549 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-01-06 10:37:59,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:37:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-01-06 10:37:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 10:37:59,550 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:59,551 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] [2021-01-06 10:37:59,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:37:59,755 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:59,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1743137406, now seen corresponding path program 10 times [2021-01-06 10:37:59,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:59,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244585256] [2021-01-06 10:37:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:37:59,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244585256] [2021-01-06 10:37:59,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084477617] [2021-01-06 10:37:59,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:59,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:37:59,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:59,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:37:59,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:38:00,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:00,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:38:00,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723283517] [2021-01-06 10:38:00,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:38:00,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:00,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:38:00,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:38:00,045 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 13 states. [2021-01-06 10:38:00,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:00,084 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2021-01-06 10:38:00,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:38:00,085 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2021-01-06 10:38:00,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:00,086 INFO L225 Difference]: With dead ends: 118 [2021-01-06 10:38:00,086 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:38:00,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:38:00,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:38:00,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-01-06 10:38:00,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 10:38:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-01-06 10:38:00,092 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2021-01-06 10:38:00,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:00,092 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-01-06 10:38:00,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:38:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-01-06 10:38:00,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 10:38:00,093 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:00,093 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] [2021-01-06 10:38:00,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:38:00,310 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:00,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:00,311 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 11 times [2021-01-06 10:38:00,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:00,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281793356] [2021-01-06 10:38:00,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:38:00,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281793356] [2021-01-06 10:38:00,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738785658] [2021-01-06 10:38:00,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:00,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:38:00,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:00,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:38:00,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:38:00,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:00,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:38:00,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601963825] [2021-01-06 10:38:00,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:38:00,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:00,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:38:00,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:38:00,843 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2021-01-06 10:38:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:00,888 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-01-06 10:38:00,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:38:00,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2021-01-06 10:38:00,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:00,889 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:38:00,890 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 10:38:00,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:38:00,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 10:38:00,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-01-06 10:38:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 10:38:00,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-01-06 10:38:00,896 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2021-01-06 10:38:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:00,896 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-01-06 10:38:00,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:38:00,896 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-01-06 10:38:00,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:38:00,897 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:00,898 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] [2021-01-06 10:38:01,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:38:01,112 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:01,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 12 times [2021-01-06 10:38:01,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:01,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938076671] [2021-01-06 10:38:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:38:01,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938076671] [2021-01-06 10:38:01,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10905859] [2021-01-06 10:38:01,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:01,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:38:01,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:01,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:38:01,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 10:38:01,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:01,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2021-01-06 10:38:01,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797493639] [2021-01-06 10:38:01,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:38:01,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:01,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:38:01,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:38:01,756 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2021-01-06 10:38:01,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:01,834 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2021-01-06 10:38:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:38:01,835 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2021-01-06 10:38:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:01,836 INFO L225 Difference]: With dead ends: 125 [2021-01-06 10:38:01,836 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 10:38:01,837 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 [2021-01-06 10:38:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 10:38:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-01-06 10:38:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 10:38:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-01-06 10:38:01,860 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2021-01-06 10:38:01,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:01,860 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-01-06 10:38:01,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:38:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-01-06 10:38:01,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 10:38:01,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:01,861 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] [2021-01-06 10:38:02,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:02,076 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:02,077 INFO L82 PathProgramCache]: Analyzing trace with hash 970283450, now seen corresponding path program 13 times [2021-01-06 10:38:02,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:02,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291724817] [2021-01-06 10:38:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:38:02,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291724817] [2021-01-06 10:38:02,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994827311] [2021-01-06 10:38:02,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:02,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:38:02,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:38:02,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:02,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:38:02,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394158977] [2021-01-06 10:38:02,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:38:02,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:02,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:38:02,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:38:02,441 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 16 states. [2021-01-06 10:38:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:02,491 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-01-06 10:38:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:38:02,492 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2021-01-06 10:38:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:02,493 INFO L225 Difference]: With dead ends: 128 [2021-01-06 10:38:02,493 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 10:38:02,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:38:02,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 10:38:02,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-01-06 10:38:02,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 10:38:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-01-06 10:38:02,500 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2021-01-06 10:38:02,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:02,500 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-01-06 10:38:02,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:38:02,501 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-01-06 10:38:02,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 10:38:02,502 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:02,503 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] [2021-01-06 10:38:02,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:38:02,719 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:02,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 14 times [2021-01-06 10:38:02,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:02,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843126136] [2021-01-06 10:38:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:38:02,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843126136] [2021-01-06 10:38:02,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829786607] [2021-01-06 10:38:02,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:03,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:03,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:03,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:38:03,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:38:03,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:03,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 10:38:03,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812938491] [2021-01-06 10:38:03,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:38:03,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:03,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:38:03,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:38:03,087 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2021-01-06 10:38:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:03,137 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-01-06 10:38:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:38:03,138 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2021-01-06 10:38:03,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:03,139 INFO L225 Difference]: With dead ends: 130 [2021-01-06 10:38:03,139 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 10:38:03,139 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 [2021-01-06 10:38:03,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 10:38:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-01-06 10:38:03,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 10:38:03,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-01-06 10:38:03,143 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2021-01-06 10:38:03,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:03,144 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-01-06 10:38:03,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:38:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-01-06 10:38:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 10:38:03,145 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:03,145 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] [2021-01-06 10:38:03,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:38:03,360 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:03,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:03,361 INFO L82 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 15 times [2021-01-06 10:38:03,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:03,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811820770] [2021-01-06 10:38:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:38:03,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811820770] [2021-01-06 10:38:03,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64911981] [2021-01-06 10:38:03,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:03,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:38:03,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:03,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:38:03,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-01-06 10:38:03,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:03,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2021-01-06 10:38:03,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900897734] [2021-01-06 10:38:03,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:38:03,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:03,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:38:03,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:38:03,784 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 22 states. [2021-01-06 10:38:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:03,959 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2021-01-06 10:38:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:38:03,960 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 79 [2021-01-06 10:38:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:03,961 INFO L225 Difference]: With dead ends: 141 [2021-01-06 10:38:03,961 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 10:38:03,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:38:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 10:38:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2021-01-06 10:38:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:38:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-01-06 10:38:03,966 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2021-01-06 10:38:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:03,967 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-01-06 10:38:03,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:38:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-01-06 10:38:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 10:38:03,968 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:03,968 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] [2021-01-06 10:38:04,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:38:04,182 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:04,183 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 16 times [2021-01-06 10:38:04,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:04,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638832959] [2021-01-06 10:38:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:04,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638832959] [2021-01-06 10:38:04,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369720909] [2021-01-06 10:38:04,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:04,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:04,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:38:04,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:04,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:04,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:38:04,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461891041] [2021-01-06 10:38:04,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:38:04,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:04,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:38:04,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:38:04,607 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 19 states. [2021-01-06 10:38:04,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:04,679 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-01-06 10:38:04,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:38:04,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2021-01-06 10:38:04,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:04,681 INFO L225 Difference]: With dead ends: 146 [2021-01-06 10:38:04,681 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 10:38:04,681 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 [2021-01-06 10:38:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 10:38:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-01-06 10:38:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 10:38:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-01-06 10:38:04,686 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2021-01-06 10:38:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:04,687 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-01-06 10:38:04,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:38:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-01-06 10:38:04,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:38:04,694 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:04,694 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] [2021-01-06 10:38:04,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:04,907 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2002949072, now seen corresponding path program 17 times [2021-01-06 10:38:04,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:04,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948174050] [2021-01-06 10:38:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:05,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948174050] [2021-01-06 10:38:05,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261956508] [2021-01-06 10:38:05,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:05,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 10:38:05,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:05,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:38:05,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:05,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:05,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:38:05,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754546412] [2021-01-06 10:38:05,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:38:05,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:05,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:38:05,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:38:05,810 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 20 states. [2021-01-06 10:38:05,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:05,865 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2021-01-06 10:38:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:38:05,866 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2021-01-06 10:38:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:05,867 INFO L225 Difference]: With dead ends: 148 [2021-01-06 10:38:05,867 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 10:38:05,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:38:05,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 10:38:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-01-06 10:38:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:38:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-01-06 10:38:05,872 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2021-01-06 10:38:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:05,872 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-01-06 10:38:05,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:38:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-01-06 10:38:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:38:05,873 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:05,874 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] [2021-01-06 10:38:06,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:06,089 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:06,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:06,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 18 times [2021-01-06 10:38:06,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:06,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925943285] [2021-01-06 10:38:06,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:38:06,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925943285] [2021-01-06 10:38:06,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167728699] [2021-01-06 10:38:06,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:06,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 10:38:06,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:06,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:38:06,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-01-06 10:38:06,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:06,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-01-06 10:38:06,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29096010] [2021-01-06 10:38:07,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:38:07,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:07,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:38:07,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:38:07,004 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 26 states. [2021-01-06 10:38:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:07,154 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-01-06 10:38:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:38:07,155 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2021-01-06 10:38:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:07,156 INFO L225 Difference]: With dead ends: 159 [2021-01-06 10:38:07,156 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:38:07,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:38:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:38:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-01-06 10:38:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 10:38:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-01-06 10:38:07,161 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2021-01-06 10:38:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:07,161 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-01-06 10:38:07,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:38:07,162 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-01-06 10:38:07,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 10:38:07,163 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:07,163 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] [2021-01-06 10:38:07,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:38:07,378 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:07,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1310358570, now seen corresponding path program 19 times [2021-01-06 10:38:07,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:07,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663393009] [2021-01-06 10:38:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:38:07,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663393009] [2021-01-06 10:38:07,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875537327] [2021-01-06 10:38:07,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:07,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:38:07,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:38:07,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:07,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 10:38:07,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411995186] [2021-01-06 10:38:07,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:38:07,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:07,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:38:07,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:38:07,822 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 22 states. [2021-01-06 10:38:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:07,902 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2021-01-06 10:38:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:38:07,905 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2021-01-06 10:38:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:07,907 INFO L225 Difference]: With dead ends: 164 [2021-01-06 10:38:07,908 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 10:38:07,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:38:07,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 10:38:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-01-06 10:38:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 10:38:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-01-06 10:38:07,914 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2021-01-06 10:38:07,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:07,915 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-01-06 10:38:07,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:38:07,915 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-01-06 10:38:07,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:38:07,916 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:07,916 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] [2021-01-06 10:38:08,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:38:08,131 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:08,132 INFO L82 PathProgramCache]: Analyzing trace with hash -903575576, now seen corresponding path program 20 times [2021-01-06 10:38:08,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:08,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84143097] [2021-01-06 10:38:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:38:08,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84143097] [2021-01-06 10:38:08,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092807527] [2021-01-06 10:38:08,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:08,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:08,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:08,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:38:08,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:38:08,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:08,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 10:38:08,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423809958] [2021-01-06 10:38:08,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:38:08,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:08,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:38:08,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:38:08,621 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 23 states. [2021-01-06 10:38:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:08,689 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2021-01-06 10:38:08,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:38:08,689 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2021-01-06 10:38:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:08,690 INFO L225 Difference]: With dead ends: 166 [2021-01-06 10:38:08,691 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 10:38:08,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:38:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 10:38:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-01-06 10:38:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 10:38:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-01-06 10:38:08,696 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2021-01-06 10:38:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:08,697 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-01-06 10:38:08,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:38:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-01-06 10:38:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-01-06 10:38:08,698 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:08,698 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] [2021-01-06 10:38:08,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:08,912 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:08,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:08,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1809488934, now seen corresponding path program 21 times [2021-01-06 10:38:08,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:08,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381858243] [2021-01-06 10:38:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:38:09,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381858243] [2021-01-06 10:38:09,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683805259] [2021-01-06 10:38:09,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:09,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:38:09,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:09,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:38:09,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-01-06 10:38:09,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:09,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2021-01-06 10:38:09,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231083447] [2021-01-06 10:38:09,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:38:09,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:09,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:38:09,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:38:09,623 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 29 states. [2021-01-06 10:38:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:09,734 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2021-01-06 10:38:09,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:38:09,735 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 103 [2021-01-06 10:38:09,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:09,736 INFO L225 Difference]: With dead ends: 171 [2021-01-06 10:38:09,736 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 10:38:09,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:38:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 10:38:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-01-06 10:38:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:38:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-01-06 10:38:09,741 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2021-01-06 10:38:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:09,742 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-01-06 10:38:09,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:38:09,742 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-01-06 10:38:09,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-01-06 10:38:09,743 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:09,743 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] [2021-01-06 10:38:09,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 10:38:09,955 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:09,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:09,956 INFO L82 PathProgramCache]: Analyzing trace with hash 676687458, now seen corresponding path program 22 times [2021-01-06 10:38:09,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:09,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077539975] [2021-01-06 10:38:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 10:38:10,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077539975] [2021-01-06 10:38:10,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071854182] [2021-01-06 10:38:10,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:10,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:10,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:10,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:38:10,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2021-01-06 10:38:10,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:10,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 31 [2021-01-06 10:38:10,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310335878] [2021-01-06 10:38:10,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:38:10,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:10,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:38:10,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:38:10,601 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 31 states. [2021-01-06 10:38:10,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:10,702 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2021-01-06 10:38:10,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 10:38:10,703 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 107 [2021-01-06 10:38:10,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:10,704 INFO L225 Difference]: With dead ends: 177 [2021-01-06 10:38:10,704 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 10:38:10,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:38:10,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 10:38:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2021-01-06 10:38:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 10:38:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-01-06 10:38:10,710 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2021-01-06 10:38:10,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:10,711 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-01-06 10:38:10,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:38:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-01-06 10:38:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 10:38:10,712 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:10,713 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] [2021-01-06 10:38:10,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:10,927 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:10,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1973169506, now seen corresponding path program 23 times [2021-01-06 10:38:10,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:10,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201268450] [2021-01-06 10:38:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-01-06 10:38:11,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201268450] [2021-01-06 10:38:11,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212207630] [2021-01-06 10:38:11,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:13,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-01-06 10:38:13,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:13,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:38:13,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-01-06 10:38:13,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:13,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2021-01-06 10:38:13,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228067316] [2021-01-06 10:38:13,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:38:13,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:13,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:38:13,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:38:13,607 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 32 states. [2021-01-06 10:38:13,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:13,797 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2021-01-06 10:38:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:38:13,798 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 111 [2021-01-06 10:38:13,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:13,799 INFO L225 Difference]: With dead ends: 189 [2021-01-06 10:38:13,799 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 10:38:13,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:38:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 10:38:13,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2021-01-06 10:38:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 10:38:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-01-06 10:38:13,807 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 111 [2021-01-06 10:38:13,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:13,807 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-01-06 10:38:13,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:38:13,807 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-01-06 10:38:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-01-06 10:38:13,809 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:13,809 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] [2021-01-06 10:38:14,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:38:14,023 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:14,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:14,024 INFO L82 PathProgramCache]: Analyzing trace with hash 41685082, now seen corresponding path program 24 times [2021-01-06 10:38:14,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:14,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540046943] [2021-01-06 10:38:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:38:14,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540046943] [2021-01-06 10:38:14,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263256689] [2021-01-06 10:38:14,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:16,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 10:38:16,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:16,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:38:16,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-01-06 10:38:17,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:17,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2021-01-06 10:38:17,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058521088] [2021-01-06 10:38:17,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:38:17,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:17,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:38:17,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:38:17,226 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 34 states. [2021-01-06 10:38:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:17,391 INFO L93 Difference]: Finished difference Result 203 states and 214 transitions. [2021-01-06 10:38:17,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:38:17,391 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 119 [2021-01-06 10:38:17,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:17,393 INFO L225 Difference]: With dead ends: 203 [2021-01-06 10:38:17,393 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 10:38:17,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:38:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 10:38:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2021-01-06 10:38:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-01-06 10:38:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2021-01-06 10:38:17,399 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2021-01-06 10:38:17,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:17,399 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2021-01-06 10:38:17,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:38:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2021-01-06 10:38:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-01-06 10:38:17,401 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:17,401 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:17,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:38:17,617 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:17,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 25 times [2021-01-06 10:38:17,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:17,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955824803] [2021-01-06 10:38:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:17,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955824803] [2021-01-06 10:38:17,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186431600] [2021-01-06 10:38:17,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:18,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:38:18,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:18,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:18,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 10:38:18,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752873497] [2021-01-06 10:38:18,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:38:18,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:18,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:38:18,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:38:18,219 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2021-01-06 10:38:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:18,310 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2021-01-06 10:38:18,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:38:18,314 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2021-01-06 10:38:18,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:18,315 INFO L225 Difference]: With dead ends: 208 [2021-01-06 10:38:18,316 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 10:38:18,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:38:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 10:38:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-01-06 10:38:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 10:38:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2021-01-06 10:38:18,321 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2021-01-06 10:38:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:18,322 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2021-01-06 10:38:18,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:38:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2021-01-06 10:38:18,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-01-06 10:38:18,323 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:18,323 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:18,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:38:18,537 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:18,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 26 times [2021-01-06 10:38:18,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:18,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21746353] [2021-01-06 10:38:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:18,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21746353] [2021-01-06 10:38:18,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093752343] [2021-01-06 10:38:18,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:19,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:19,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:19,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:38:19,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:19,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:19,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 10:38:19,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647457983] [2021-01-06 10:38:19,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:38:19,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:19,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:38:19,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:38:19,156 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 29 states. [2021-01-06 10:38:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:19,232 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2021-01-06 10:38:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:38:19,232 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2021-01-06 10:38:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:19,234 INFO L225 Difference]: With dead ends: 210 [2021-01-06 10:38:19,234 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 10:38:19,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:38:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 10:38:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-01-06 10:38:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 10:38:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2021-01-06 10:38:19,240 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2021-01-06 10:38:19,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:19,240 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2021-01-06 10:38:19,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:38:19,240 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2021-01-06 10:38:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-01-06 10:38:19,242 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:19,242 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] [2021-01-06 10:38:19,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:38:19,458 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1805967086, now seen corresponding path program 27 times [2021-01-06 10:38:19,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:19,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415641623] [2021-01-06 10:38:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:19,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415641623] [2021-01-06 10:38:19,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817107032] [2021-01-06 10:38:19,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:20,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:38:20,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:20,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:38:20,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2021-01-06 10:38:20,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:20,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2021-01-06 10:38:20,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603556617] [2021-01-06 10:38:20,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:38:20,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:20,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:38:20,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:38:20,532 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 37 states. [2021-01-06 10:38:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:20,687 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2021-01-06 10:38:20,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:38:20,687 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 131 [2021-01-06 10:38:20,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:20,688 INFO L225 Difference]: With dead ends: 215 [2021-01-06 10:38:20,689 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 10:38:20,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:38:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 10:38:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2021-01-06 10:38:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 10:38:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2021-01-06 10:38:20,694 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 131 [2021-01-06 10:38:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:20,695 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2021-01-06 10:38:20,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:38:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2021-01-06 10:38:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:38:20,696 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:20,696 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:20,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:20,912 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:20,913 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 28 times [2021-01-06 10:38:20,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:20,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10218721] [2021-01-06 10:38:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:38:21,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10218721] [2021-01-06 10:38:21,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28612747] [2021-01-06 10:38:21,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:21,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:21,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:21,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:38:21,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:38:21,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:21,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 10:38:21,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863084785] [2021-01-06 10:38:21,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:38:21,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:21,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:38:21,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:38:21,606 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 31 states. [2021-01-06 10:38:21,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:21,702 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2021-01-06 10:38:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:38:21,703 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 135 [2021-01-06 10:38:21,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:21,704 INFO L225 Difference]: With dead ends: 218 [2021-01-06 10:38:21,704 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 10:38:21,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:38:21,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 10:38:21,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-01-06 10:38:21,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-01-06 10:38:21,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-01-06 10:38:21,710 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2021-01-06 10:38:21,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:21,710 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-01-06 10:38:21,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:38:21,711 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-01-06 10:38:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-01-06 10:38:21,712 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:21,712 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] [2021-01-06 10:38:21,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:21,928 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:21,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1428315124, now seen corresponding path program 29 times [2021-01-06 10:38:21,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:21,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088991407] [2021-01-06 10:38:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:38:22,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088991407] [2021-01-06 10:38:22,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933671467] [2021-01-06 10:38:22,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:23,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-01-06 10:38:23,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:23,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:38:23,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2021-01-06 10:38:24,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:24,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2021-01-06 10:38:24,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866240100] [2021-01-06 10:38:24,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:38:24,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:24,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:38:24,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:38:24,183 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 40 states. [2021-01-06 10:38:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:24,352 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2021-01-06 10:38:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:38:24,353 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 137 [2021-01-06 10:38:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:24,354 INFO L225 Difference]: With dead ends: 223 [2021-01-06 10:38:24,354 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 10:38:24,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:38:24,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 10:38:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2021-01-06 10:38:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 10:38:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2021-01-06 10:38:24,360 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 137 [2021-01-06 10:38:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:24,360 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2021-01-06 10:38:24,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:38:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2021-01-06 10:38:24,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-01-06 10:38:24,361 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:24,361 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] [2021-01-06 10:38:24,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:24,574 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:24,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:24,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1798907208, now seen corresponding path program 30 times [2021-01-06 10:38:24,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:24,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751474064] [2021-01-06 10:38:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-01-06 10:38:25,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751474064] [2021-01-06 10:38:25,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146232809] [2021-01-06 10:38:25,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:28,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 10:38:28,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:28,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:38:28,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2021-01-06 10:38:28,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:28,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 41 [2021-01-06 10:38:28,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349296765] [2021-01-06 10:38:28,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:38:28,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:28,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:38:28,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:38:28,482 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 41 states. [2021-01-06 10:38:28,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:28,800 INFO L93 Difference]: Finished difference Result 235 states and 246 transitions. [2021-01-06 10:38:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:38:28,800 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 141 [2021-01-06 10:38:28,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:28,802 INFO L225 Difference]: With dead ends: 235 [2021-01-06 10:38:28,802 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 10:38:28,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:38:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 10:38:28,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2021-01-06 10:38:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2021-01-06 10:38:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2021-01-06 10:38:28,808 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 141 [2021-01-06 10:38:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:28,808 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2021-01-06 10:38:28,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:38:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2021-01-06 10:38:28,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-01-06 10:38:28,809 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:28,810 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:29,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 10:38:29,024 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:29,025 INFO L82 PathProgramCache]: Analyzing trace with hash 308754692, now seen corresponding path program 31 times [2021-01-06 10:38:29,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:29,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156585842] [2021-01-06 10:38:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:29,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156585842] [2021-01-06 10:38:29,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496356179] [2021-01-06 10:38:29,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 10:38:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:29,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:29,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 10:38:29,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323908992] [2021-01-06 10:38:29,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:38:29,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:29,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:38:29,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:38:29,824 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 34 states. [2021-01-06 10:38:29,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:29,922 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2021-01-06 10:38:29,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:38:29,922 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2021-01-06 10:38:29,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:29,923 INFO L225 Difference]: With dead ends: 240 [2021-01-06 10:38:29,923 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 10:38:29,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:38:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 10:38:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-01-06 10:38:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 10:38:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-01-06 10:38:29,929 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2021-01-06 10:38:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:29,929 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-01-06 10:38:29,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:38:29,930 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-01-06 10:38:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 10:38:29,931 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:29,931 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:30,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:30,145 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:30,146 INFO L82 PathProgramCache]: Analyzing trace with hash -747071166, now seen corresponding path program 32 times [2021-01-06 10:38:30,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:30,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437742744] [2021-01-06 10:38:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:30,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437742744] [2021-01-06 10:38:30,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298063988] [2021-01-06 10:38:30,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:30,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:30,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:30,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:38:30,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:30,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:30,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 10:38:30,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81264553] [2021-01-06 10:38:30,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:38:30,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:30,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:38:30,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:38:30,950 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 35 states. [2021-01-06 10:38:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:31,069 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2021-01-06 10:38:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:38:31,072 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 151 [2021-01-06 10:38:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:31,073 INFO L225 Difference]: With dead ends: 242 [2021-01-06 10:38:31,074 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 10:38:31,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:38:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 10:38:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-01-06 10:38:31,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 10:38:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2021-01-06 10:38:31,080 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2021-01-06 10:38:31,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:31,080 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2021-01-06 10:38:31,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:38:31,080 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2021-01-06 10:38:31,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-01-06 10:38:31,081 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:31,081 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] [2021-01-06 10:38:31,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 10:38:31,297 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:31,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1783438848, now seen corresponding path program 33 times [2021-01-06 10:38:31,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:31,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426840479] [2021-01-06 10:38:31,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:31,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426840479] [2021-01-06 10:38:31,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709215486] [2021-01-06 10:38:31,882 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:32,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:38:32,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:32,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:38:32,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2021-01-06 10:38:32,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:32,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 12] total 45 [2021-01-06 10:38:32,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522575806] [2021-01-06 10:38:32,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 10:38:32,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:32,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 10:38:32,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:38:32,797 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 45 states. [2021-01-06 10:38:33,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:33,145 INFO L93 Difference]: Finished difference Result 253 states and 264 transitions. [2021-01-06 10:38:33,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 10:38:33,145 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 153 [2021-01-06 10:38:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:33,146 INFO L225 Difference]: With dead ends: 253 [2021-01-06 10:38:33,146 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 10:38:33,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:38:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 10:38:33,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2021-01-06 10:38:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 10:38:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2021-01-06 10:38:33,153 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 153 [2021-01-06 10:38:33,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:33,153 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2021-01-06 10:38:33,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 10:38:33,153 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2021-01-06 10:38:33,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 10:38:33,154 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:33,154 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:33,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:33,355 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:33,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:33,356 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 34 times [2021-01-06 10:38:33,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:33,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091245334] [2021-01-06 10:38:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-01-06 10:38:34,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091245334] [2021-01-06 10:38:34,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171787176] [2021-01-06 10:38:34,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:34,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:34,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:34,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:38:34,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2021-01-06 10:38:34,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:34,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2021-01-06 10:38:34,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231853033] [2021-01-06 10:38:34,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:38:34,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:34,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:38:34,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:38:34,488 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 47 states. [2021-01-06 10:38:34,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:34,732 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2021-01-06 10:38:34,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:38:34,732 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 161 [2021-01-06 10:38:34,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:34,733 INFO L225 Difference]: With dead ends: 267 [2021-01-06 10:38:34,734 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 10:38:34,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:38:34,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 10:38:34,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2021-01-06 10:38:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-01-06 10:38:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2021-01-06 10:38:34,740 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 161 [2021-01-06 10:38:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:34,740 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2021-01-06 10:38:34,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:38:34,740 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2021-01-06 10:38:34,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-01-06 10:38:34,741 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:34,741 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:34,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:38:34,956 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:34,957 INFO L82 PathProgramCache]: Analyzing trace with hash -628416392, now seen corresponding path program 35 times [2021-01-06 10:38:34,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:34,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581772393] [2021-01-06 10:38:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-01-06 10:38:35,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581772393] [2021-01-06 10:38:35,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143340823] [2021-01-06 10:38:35,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:48,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-01-06 10:39:48,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:39:48,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:39:48,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:39:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2021-01-06 10:39:48,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:39:48,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2021-01-06 10:39:48,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263287858] [2021-01-06 10:39:48,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 10:39:48,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:39:48,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 10:39:48,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:39:48,531 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 49 states. [2021-01-06 10:39:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:39:48,887 INFO L93 Difference]: Finished difference Result 281 states and 292 transitions. [2021-01-06 10:39:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 10:39:48,888 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 169 [2021-01-06 10:39:48,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:39:48,889 INFO L225 Difference]: With dead ends: 281 [2021-01-06 10:39:48,889 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 10:39:48,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:39:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 10:39:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2021-01-06 10:39:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 10:39:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-01-06 10:39:48,896 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 169 [2021-01-06 10:39:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:39:48,896 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-01-06 10:39:48,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 10:39:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-01-06 10:39:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-01-06 10:39:48,898 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:39:48,898 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 12, 12, 12, 12, 12, 12, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:39:49,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:39:49,099 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:39:49,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:39:49,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1809286964, now seen corresponding path program 36 times [2021-01-06 10:39:49,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:39:49,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152901069] [2021-01-06 10:39:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:39:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:39:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-01-06 10:39:49,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152901069] [2021-01-06 10:39:49,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746641327] [2021-01-06 10:39:49,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:39:58,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:39:58,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:39:58,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:39:58,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:39:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1657 trivial. 0 not checked. [2021-01-06 10:39:58,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:39:58,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 12] total 48 [2021-01-06 10:39:58,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130879179] [2021-01-06 10:39:58,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 10:39:58,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:39:58,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 10:39:58,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:39:58,683 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 48 states. [2021-01-06 10:39:58,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:39:58,908 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2021-01-06 10:39:58,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 10:39:58,909 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 177 [2021-01-06 10:39:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:39:58,910 INFO L225 Difference]: With dead ends: 289 [2021-01-06 10:39:58,910 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 10:39:58,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:39:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 10:39:58,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2021-01-06 10:39:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 10:39:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2021-01-06 10:39:58,918 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 177 [2021-01-06 10:39:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:39:58,918 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2021-01-06 10:39:58,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 10:39:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2021-01-06 10:39:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 10:39:58,920 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:39:58,920 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:39:59,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:39:59,132 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:39:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:39:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1693026416, now seen corresponding path program 37 times [2021-01-06 10:39:59,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:39:59,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694585546] [2021-01-06 10:39:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:39:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:39:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:39:59,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694585546] [2021-01-06 10:39:59,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922419098] [2021-01-06 10:39:59,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:40:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:40:00,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:40:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:40:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:40:00,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:40:00,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 10:40:00,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54219067] [2021-01-06 10:40:00,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:40:00,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:40:00,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:40:00,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:40:00,178 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 40 states. [2021-01-06 10:40:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:40:00,325 INFO L93 Difference]: Finished difference Result 292 states and 300 transitions. [2021-01-06 10:40:00,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:40:00,326 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 181 [2021-01-06 10:40:00,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:40:00,330 INFO L225 Difference]: With dead ends: 292 [2021-01-06 10:40:00,330 INFO L226 Difference]: Without dead ends: 185 [2021-01-06 10:40:00,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:40:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-01-06 10:40:00,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-01-06 10:40:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 10:40:00,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2021-01-06 10:40:00,341 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 181 [2021-01-06 10:40:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:40:00,342 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2021-01-06 10:40:00,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:40:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2021-01-06 10:40:00,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-01-06 10:40:00,343 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:40:00,344 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:40:00,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:40:00,559 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:40:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:40:00,560 INFO L82 PathProgramCache]: Analyzing trace with hash 45772974, now seen corresponding path program 38 times [2021-01-06 10:40:00,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:40:00,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033128255] [2021-01-06 10:40:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:40:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:40:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:40:01,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033128255] [2021-01-06 10:40:01,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390011219] [2021-01-06 10:40:01,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:40:01,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:40:01,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:40:01,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:40:01,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:40:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:40:01,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:40:01,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 10:40:01,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378287806] [2021-01-06 10:40:01,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:40:01,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:40:01,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:40:01,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:40:01,654 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 41 states. [2021-01-06 10:40:01,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:40:01,783 INFO L93 Difference]: Finished difference Result 294 states and 302 transitions. [2021-01-06 10:40:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:40:01,788 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 183 [2021-01-06 10:40:01,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:40:01,790 INFO L225 Difference]: With dead ends: 294 [2021-01-06 10:40:01,790 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 10:40:01,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:40:01,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 10:40:01,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-01-06 10:40:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-01-06 10:40:01,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2021-01-06 10:40:01,797 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2021-01-06 10:40:01,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:40:01,798 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2021-01-06 10:40:01,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:40:01,798 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2021-01-06 10:40:01,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-01-06 10:40:01,801 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:40:01,801 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] [2021-01-06 10:40:02,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:40:02,016 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:40:02,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:40:02,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1878147436, now seen corresponding path program 39 times [2021-01-06 10:40:02,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:40:02,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884170955] [2021-01-06 10:40:02,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:40:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:40:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:40:02,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884170955] [2021-01-06 10:40:02,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093307085] [2021-01-06 10:40:02,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:40:03,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 10:40:03,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:40:03,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:40:03,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:40:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2021-01-06 10:40:04,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:40:04,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 52 [2021-01-06 10:40:04,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943745143] [2021-01-06 10:40:04,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 10:40:04,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:40:04,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 10:40:04,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:40:04,334 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 52 states. [2021-01-06 10:40:04,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:40:04,560 INFO L93 Difference]: Finished difference Result 299 states and 308 transitions. [2021-01-06 10:40:04,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 10:40:04,560 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 185 [2021-01-06 10:40:04,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:40:04,562 INFO L225 Difference]: With dead ends: 299 [2021-01-06 10:40:04,562 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 10:40:04,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:40:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 10:40:04,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-01-06 10:40:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2021-01-06 10:40:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2021-01-06 10:40:04,570 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 185 [2021-01-06 10:40:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:40:04,571 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2021-01-06 10:40:04,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 10:40:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2021-01-06 10:40:04,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-01-06 10:40:04,572 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:40:04,573 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:40:04,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 10:40:04,787 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:40:04,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:40:04,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1682311512, now seen corresponding path program 40 times [2021-01-06 10:40:04,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:40:04,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821082412] [2021-01-06 10:40:04,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:40:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:40:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-01-06 10:40:05,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821082412] [2021-01-06 10:40:05,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167507189] [2021-01-06 10:40:05,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:40:05,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:40:05,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:40:05,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:40:05,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:40:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2021-01-06 10:40:06,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:40:06,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2021-01-06 10:40:06,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756000592] [2021-01-06 10:40:06,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 10:40:06,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:40:06,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 10:40:06,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:40:06,260 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 54 states. [2021-01-06 10:40:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:40:06,506 INFO L93 Difference]: Finished difference Result 305 states and 314 transitions. [2021-01-06 10:40:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 10:40:06,506 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 189 [2021-01-06 10:40:06,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:40:06,508 INFO L225 Difference]: With dead ends: 305 [2021-01-06 10:40:06,508 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 10:40:06,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:40:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 10:40:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2021-01-06 10:40:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2021-01-06 10:40:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2021-01-06 10:40:06,515 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 189 [2021-01-06 10:40:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:40:06,515 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2021-01-06 10:40:06,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 10:40:06,516 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2021-01-06 10:40:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-01-06 10:40:06,517 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:40:06,517 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:40:06,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:40:06,731 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:40:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:40:06,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1750482404, now seen corresponding path program 41 times [2021-01-06 10:40:06,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:40:06,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991903033] [2021-01-06 10:40:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:40:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:40:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 10:40:07,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991903033] [2021-01-06 10:40:07,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264290443] [2021-01-06 10:40:07,634 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