/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/bor3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:33:43,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:33:43,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:33:43,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:33:43,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:33:43,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:33:43,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:33:43,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:33:43,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:33:43,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:33:43,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:33:43,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:33:43,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:33:43,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:33:43,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:33:43,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:33:43,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:33:43,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:33:43,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:33:43,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:33:43,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:33:43,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:33:43,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:33:43,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:33:43,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:33:43,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:33:43,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:33:43,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:33:43,747 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 10:33:43,799 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:33:43,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:33:43,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:33:43,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:33:43,804 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:33:43,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:33:43,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:33:43,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:33:43,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:33:43,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:33:43,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:33:43,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:33:43,807 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:33:43,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:33:43,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:33:43,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:33:43,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:33:43,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:33:43,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:33:43,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:33:43,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:33:43,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:33:43,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:33:43,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:33:43,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:33:43,809 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:33:44,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:33:44,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:33:44,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:33:44,270 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:33:44,270 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:33:44,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bor3.i [2021-01-06 10:33:44,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f28586b50/a44127a34a9f4604a4c7a58e772f331f/FLAGda8492950 [2021-01-06 10:33:44,954 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:33:44,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/bor3.i [2021-01-06 10:33:44,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f28586b50/a44127a34a9f4604a4c7a58e772f331f/FLAGda8492950 [2021-01-06 10:33:45,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f28586b50/a44127a34a9f4604a4c7a58e772f331f [2021-01-06 10:33:45,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:33:45,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:33:45,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:33:45,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:33:45,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:33:45,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:33:45" (1/1) ... [2021-01-06 10:33:45,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5118d60c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:33:45, skipping insertion in model container [2021-01-06 10:33:45,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:33:45" (1/1) ... [2021-01-06 10:33:45,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:33:45,354 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~res~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~res~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[9999]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:33:45,605 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/bor3.i[1297,1310] [2021-01-06 10:33:45,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:33:45,618 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~res~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~res~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[39996],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:33:45,644 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/bor3.i[1297,1310] [2021-01-06 10:33:45,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:33:45,662 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:33:45,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:33:45 WrapperNode [2021-01-06 10:33:45,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:33:45,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:33:45,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:33:45,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:33:45,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:33:45" (1/1) ... [2021-01-06 10:33:45,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:33:45" (1/1) ... [2021-01-06 10:33:45,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:33:45,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:33:45,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:33:45,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:33:45,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:33:45" (1/1) ... [2021-01-06 10:33:45,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:33:45" (1/1) ... [2021-01-06 10:33:45,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:33:45" (1/1) ... [2021-01-06 10:33:45,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:33:45" (1/1) ... [2021-01-06 10:33:45,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:33:45" (1/1) ... [2021-01-06 10:33:45,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:33:45" (1/1) ... [2021-01-06 10:33:45,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:33:45" (1/1) ... [2021-01-06 10:33:45,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:33:45,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:33:45,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:33:45,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:33:45,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:33:45" (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 10:33:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:33:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:33:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:33:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:33:45,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:33:45,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:33:45,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:33:46,410 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:33:46,410 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 10:33:46,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:33:46 BoogieIcfgContainer [2021-01-06 10:33:46,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:33:46,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:33:46,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:33:46,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:33:46,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:33:45" (1/3) ... [2021-01-06 10:33:46,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6beb00d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:33:46, skipping insertion in model container [2021-01-06 10:33:46,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:33:45" (2/3) ... [2021-01-06 10:33:46,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6beb00d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:33:46, skipping insertion in model container [2021-01-06 10:33:46,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:33:46" (3/3) ... [2021-01-06 10:33:46,420 INFO L111 eAbstractionObserver]: Analyzing ICFG bor3.i [2021-01-06 10:33:46,427 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:33:46,433 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:33:46,452 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:33:46,480 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:33:46,480 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:33:46,481 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:33:46,481 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:33:46,481 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:33:46,481 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:33:46,481 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:33:46,481 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:33:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-01-06 10:33:46,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:33:46,503 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:46,504 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 10:33:46,504 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:46,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1812171002, now seen corresponding path program 1 times [2021-01-06 10:33:46,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:46,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579948216] [2021-01-06 10:33:46,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:46,748 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 10:33:46,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579948216] [2021-01-06 10:33:46,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:33:46,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:33:46,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281739256] [2021-01-06 10:33:46,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:33:46,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:46,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:33:46,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:33:46,779 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2021-01-06 10:33:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:46,803 INFO L93 Difference]: Finished difference Result 80 states and 122 transitions. [2021-01-06 10:33:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:33:46,805 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2021-01-06 10:33:46,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:46,816 INFO L225 Difference]: With dead ends: 80 [2021-01-06 10:33:46,816 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 10:33:46,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:33:46,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 10:33:46,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 10:33:46,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:33:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 54 transitions. [2021-01-06 10:33:46,863 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 54 transitions. Word has length 17 [2021-01-06 10:33:46,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:46,863 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 54 transitions. [2021-01-06 10:33:46,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:33:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 54 transitions. [2021-01-06 10:33:46,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:33:46,865 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:46,865 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 10:33:46,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:33:46,865 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:46,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:46,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1650035846, now seen corresponding path program 1 times [2021-01-06 10:33:46,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:46,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317591780] [2021-01-06 10:33:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:46,989 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 10:33:46,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317591780] [2021-01-06 10:33:46,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:33:46,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:33:46,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077499179] [2021-01-06 10:33:46,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:33:46,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:46,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:33:46,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:33:46,996 INFO L87 Difference]: Start difference. First operand 38 states and 54 transitions. Second operand 3 states. [2021-01-06 10:33:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:47,034 INFO L93 Difference]: Finished difference Result 74 states and 106 transitions. [2021-01-06 10:33:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:33:47,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 10:33:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:47,036 INFO L225 Difference]: With dead ends: 74 [2021-01-06 10:33:47,037 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 10:33:47,038 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 10:33:47,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 10:33:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-01-06 10:33:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:33:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2021-01-06 10:33:47,046 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 17 [2021-01-06 10:33:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:47,046 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2021-01-06 10:33:47,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:33:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2021-01-06 10:33:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:33:47,048 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:47,048 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 10:33:47,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:33:47,049 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:47,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1076855480, now seen corresponding path program 1 times [2021-01-06 10:33:47,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:47,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3789807] [2021-01-06 10:33:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:47,104 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 10:33:47,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3789807] [2021-01-06 10:33:47,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432410714] [2021-01-06 10:33:47,106 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 10:33:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:47,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:33:47,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:47,310 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 10:33:47,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:47,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:33:47,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276076912] [2021-01-06 10:33:47,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:33:47,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:47,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:33:47,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:33:47,313 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand 3 states. [2021-01-06 10:33:47,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:47,383 INFO L93 Difference]: Finished difference Result 86 states and 127 transitions. [2021-01-06 10:33:47,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:33:47,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:33:47,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:47,385 INFO L225 Difference]: With dead ends: 86 [2021-01-06 10:33:47,386 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 10:33:47,386 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 10:33:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 10:33:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2021-01-06 10:33:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 10:33:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2021-01-06 10:33:47,394 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 19 [2021-01-06 10:33:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:47,395 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2021-01-06 10:33:47,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:33:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2021-01-06 10:33:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:33:47,396 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:47,397 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, 1, 1, 1, 1] [2021-01-06 10:33:47,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:33:47,611 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:47,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:47,613 INFO L82 PathProgramCache]: Analyzing trace with hash -307053645, now seen corresponding path program 1 times [2021-01-06 10:33:47,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:47,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263392044] [2021-01-06 10:33:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:47,665 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 10:33:47,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263392044] [2021-01-06 10:33:47,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659362694] [2021-01-06 10:33:47,666 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 10:33:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:47,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:33:47,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:47,868 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 10:33:47,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:47,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:33:47,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298397320] [2021-01-06 10:33:47,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:33:47,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:47,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:33:47,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:33:47,871 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand 3 states. [2021-01-06 10:33:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:47,890 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2021-01-06 10:33:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:33:47,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2021-01-06 10:33:47,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:47,893 INFO L225 Difference]: With dead ends: 58 [2021-01-06 10:33:47,893 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 10:33:47,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 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 10:33:47,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 10:33:47,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-01-06 10:33:47,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 10:33:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2021-01-06 10:33:47,900 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 31 [2021-01-06 10:33:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:47,901 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2021-01-06 10:33:47,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:33:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2021-01-06 10:33:47,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 10:33:47,902 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:47,902 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, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:48,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:48,117 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:48,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:48,119 INFO L82 PathProgramCache]: Analyzing trace with hash -429798735, now seen corresponding path program 1 times [2021-01-06 10:33:48,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:48,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741695090] [2021-01-06 10:33:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:48,204 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 10:33:48,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741695090] [2021-01-06 10:33:48,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899280494] [2021-01-06 10:33:48,207 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 10:33:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:48,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:33:48,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:48,505 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 10:33:48,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:33:48,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:33:48,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101782419] [2021-01-06 10:33:48,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:33:48,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:48,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:33:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:33:48,508 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand 5 states. [2021-01-06 10:33:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:48,538 INFO L93 Difference]: Finished difference Result 84 states and 116 transitions. [2021-01-06 10:33:48,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:33:48,539 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2021-01-06 10:33:48,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:48,540 INFO L225 Difference]: With dead ends: 84 [2021-01-06 10:33:48,540 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 10:33:48,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 10:33:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 10:33:48,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-01-06 10:33:48,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 10:33:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2021-01-06 10:33:48,547 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 33 [2021-01-06 10:33:48,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:48,547 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2021-01-06 10:33:48,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:33:48,548 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2021-01-06 10:33:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:33:48,549 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:48,549 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, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:48,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:48,765 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:48,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:48,766 INFO L82 PathProgramCache]: Analyzing trace with hash -737108497, now seen corresponding path program 2 times [2021-01-06 10:33:48,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:48,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156269661] [2021-01-06 10:33:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:48,855 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 10:33:48,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156269661] [2021-01-06 10:33:48,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957903607] [2021-01-06 10:33:48,856 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 10:33:48,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:33:48,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:48,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:33:48,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:33:49,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:33:49,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 10:33:49,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249395219] [2021-01-06 10:33:49,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:33:49,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:49,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:33:49,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:33:49,092 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 7 states. [2021-01-06 10:33:49,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:49,204 INFO L93 Difference]: Finished difference Result 125 states and 184 transitions. [2021-01-06 10:33:49,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:33:49,205 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-01-06 10:33:49,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:49,206 INFO L225 Difference]: With dead ends: 125 [2021-01-06 10:33:49,206 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 10:33:49,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:33:49,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 10:33:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2021-01-06 10:33:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:33:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2021-01-06 10:33:49,215 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 35 [2021-01-06 10:33:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:49,216 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2021-01-06 10:33:49,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:33:49,216 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2021-01-06 10:33:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:33:49,220 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:49,220 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1] [2021-01-06 10:33:49,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:49,434 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash 237498664, now seen corresponding path program 3 times [2021-01-06 10:33:49,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:49,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160949567] [2021-01-06 10:33:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:33:49,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160949567] [2021-01-06 10:33:49,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184184275] [2021-01-06 10:33:49,513 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 10:33:49,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:33:49,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:49,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:33:49,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:33:49,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:33:49,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:33:49,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457324138] [2021-01-06 10:33:49,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:33:49,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:49,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:33:49,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:33:49,755 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand 5 states. [2021-01-06 10:33:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:49,786 INFO L93 Difference]: Finished difference Result 92 states and 129 transitions. [2021-01-06 10:33:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:33:49,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2021-01-06 10:33:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:49,788 INFO L225 Difference]: With dead ends: 92 [2021-01-06 10:33:49,788 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:33:49,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 10:33:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:33:49,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-01-06 10:33:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 10:33:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2021-01-06 10:33:49,796 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 49 [2021-01-06 10:33:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:49,797 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2021-01-06 10:33:49,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:33:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2021-01-06 10:33:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:33:49,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:49,799 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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 10:33:50,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:33:50,014 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:50,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:50,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1262060198, now seen corresponding path program 4 times [2021-01-06 10:33:50,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:50,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159621253] [2021-01-06 10:33:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 10:33:50,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159621253] [2021-01-06 10:33:50,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608134767] [2021-01-06 10:33:50,099 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 10:33:50,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:33:50,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:50,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:33:50,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:33:50,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:33:50,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-01-06 10:33:50,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384536599] [2021-01-06 10:33:50,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:33:50,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:50,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:33:50,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:33:50,386 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand 9 states. [2021-01-06 10:33:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:50,517 INFO L93 Difference]: Finished difference Result 173 states and 256 transitions. [2021-01-06 10:33:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:33:50,517 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2021-01-06 10:33:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:50,519 INFO L225 Difference]: With dead ends: 173 [2021-01-06 10:33:50,519 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 10:33:50,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:33:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 10:33:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2021-01-06 10:33:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 10:33:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2021-01-06 10:33:50,528 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 51 [2021-01-06 10:33:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:50,528 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2021-01-06 10:33:50,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:33:50,529 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2021-01-06 10:33:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:33:50,530 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:50,530 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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 10:33:50,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:50,745 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:50,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:50,746 INFO L82 PathProgramCache]: Analyzing trace with hash 66921823, now seen corresponding path program 5 times [2021-01-06 10:33:50,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:50,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382054564] [2021-01-06 10:33:50,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 10:33:50,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382054564] [2021-01-06 10:33:50,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259200197] [2021-01-06 10:33:50,860 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 10:33:51,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:33:51,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:51,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:33:51,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-01-06 10:33:51,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:33:51,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-01-06 10:33:51,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824368656] [2021-01-06 10:33:51,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:33:51,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:51,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:33:51,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:33:51,234 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand 11 states. [2021-01-06 10:33:51,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:51,411 INFO L93 Difference]: Finished difference Result 217 states and 324 transitions. [2021-01-06 10:33:51,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:33:51,412 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2021-01-06 10:33:51,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:51,413 INFO L225 Difference]: With dead ends: 217 [2021-01-06 10:33:51,413 INFO L226 Difference]: Without dead ends: 135 [2021-01-06 10:33:51,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:33:51,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-01-06 10:33:51,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 116. [2021-01-06 10:33:51,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 10:33:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 168 transitions. [2021-01-06 10:33:51,422 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 168 transitions. Word has length 65 [2021-01-06 10:33:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:51,423 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 168 transitions. [2021-01-06 10:33:51,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:33:51,423 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 168 transitions. [2021-01-06 10:33:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 10:33:51,424 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:51,425 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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 10:33:51,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:51,639 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:51,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:51,640 INFO L82 PathProgramCache]: Analyzing trace with hash 332584472, now seen corresponding path program 6 times [2021-01-06 10:33:51,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:51,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229270981] [2021-01-06 10:33:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-01-06 10:33:51,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229270981] [2021-01-06 10:33:51,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791295332] [2021-01-06 10:33:51,758 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 10:33:51,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 10:33:51,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:51,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:33:51,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-01-06 10:33:52,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:52,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2021-01-06 10:33:52,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813358592] [2021-01-06 10:33:52,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:33:52,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:52,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:33:52,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:33:52,370 INFO L87 Difference]: Start difference. First operand 116 states and 168 transitions. Second operand 11 states. [2021-01-06 10:33:52,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:52,829 INFO L93 Difference]: Finished difference Result 486 states and 709 transitions. [2021-01-06 10:33:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:33:52,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2021-01-06 10:33:52,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:52,832 INFO L225 Difference]: With dead ends: 486 [2021-01-06 10:33:52,833 INFO L226 Difference]: Without dead ends: 393 [2021-01-06 10:33:52,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:33:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-01-06 10:33:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 301. [2021-01-06 10:33:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2021-01-06 10:33:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 437 transitions. [2021-01-06 10:33:52,854 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 437 transitions. Word has length 79 [2021-01-06 10:33:52,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:52,855 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 437 transitions. [2021-01-06 10:33:52,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:33:52,855 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 437 transitions. [2021-01-06 10:33:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 10:33:52,857 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:52,857 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:53,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:33:53,072 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:53,072 INFO L82 PathProgramCache]: Analyzing trace with hash 133834219, now seen corresponding path program 1 times [2021-01-06 10:33:53,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:53,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938471940] [2021-01-06 10:33:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-01-06 10:33:53,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938471940] [2021-01-06 10:33:53,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19779821] [2021-01-06 10:33:53,233 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 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 10:33:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:53,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:33:53,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-01-06 10:33:53,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:33:53,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:33:53,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584946839] [2021-01-06 10:33:53,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:33:53,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:53,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:33:53,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:33:53,545 INFO L87 Difference]: Start difference. First operand 301 states and 437 transitions. Second operand 9 states. [2021-01-06 10:33:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:53,600 INFO L93 Difference]: Finished difference Result 592 states and 864 transitions. [2021-01-06 10:33:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:33:53,601 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2021-01-06 10:33:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:53,603 INFO L225 Difference]: With dead ends: 592 [2021-01-06 10:33:53,603 INFO L226 Difference]: Without dead ends: 304 [2021-01-06 10:33:53,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:33:53,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-01-06 10:33:53,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 303. [2021-01-06 10:33:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2021-01-06 10:33:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 439 transitions. [2021-01-06 10:33:53,618 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 439 transitions. Word has length 82 [2021-01-06 10:33:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:53,618 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 439 transitions. [2021-01-06 10:33:53,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:33:53,619 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 439 transitions. [2021-01-06 10:33:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 10:33:53,620 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:53,620 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:53,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:53,835 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:53,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:53,836 INFO L82 PathProgramCache]: Analyzing trace with hash -15864211, now seen corresponding path program 2 times [2021-01-06 10:33:53,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:53,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827141041] [2021-01-06 10:33:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-01-06 10:33:53,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827141041] [2021-01-06 10:33:53,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935937390] [2021-01-06 10:33:53,958 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 10:33:54,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:33:54,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:54,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:33:54,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-01-06 10:33:54,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:33:54,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:33:54,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191774803] [2021-01-06 10:33:54,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:33:54,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:54,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:33:54,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:33:54,245 INFO L87 Difference]: Start difference. First operand 303 states and 439 transitions. Second operand 10 states. [2021-01-06 10:33:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:54,304 INFO L93 Difference]: Finished difference Result 594 states and 866 transitions. [2021-01-06 10:33:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:33:54,305 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2021-01-06 10:33:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:54,307 INFO L225 Difference]: With dead ends: 594 [2021-01-06 10:33:54,307 INFO L226 Difference]: Without dead ends: 306 [2021-01-06 10:33:54,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 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 10:33:54,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-01-06 10:33:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2021-01-06 10:33:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2021-01-06 10:33:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 441 transitions. [2021-01-06 10:33:54,320 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 441 transitions. Word has length 84 [2021-01-06 10:33:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:54,320 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 441 transitions. [2021-01-06 10:33:54,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:33:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 441 transitions. [2021-01-06 10:33:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:33:54,321 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:54,322 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:54,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:54,536 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:54,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:54,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2142134673, now seen corresponding path program 3 times [2021-01-06 10:33:54,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:54,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291035529] [2021-01-06 10:33:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-01-06 10:33:54,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291035529] [2021-01-06 10:33:54,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438241920] [2021-01-06 10:33:54,694 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 10:33:54,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:33:54,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:54,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:33:54,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:33:55,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:33:55,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-01-06 10:33:55,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637038644] [2021-01-06 10:33:55,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:33:55,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:55,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:33:55,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:33:55,043 INFO L87 Difference]: Start difference. First operand 305 states and 441 transitions. Second operand 13 states. [2021-01-06 10:33:55,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:55,128 INFO L93 Difference]: Finished difference Result 602 states and 876 transitions. [2021-01-06 10:33:55,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:33:55,129 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 86 [2021-01-06 10:33:55,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:55,131 INFO L225 Difference]: With dead ends: 602 [2021-01-06 10:33:55,131 INFO L226 Difference]: Without dead ends: 314 [2021-01-06 10:33:55,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:33:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-01-06 10:33:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 311. [2021-01-06 10:33:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2021-01-06 10:33:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 447 transitions. [2021-01-06 10:33:55,143 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 447 transitions. Word has length 86 [2021-01-06 10:33:55,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:55,144 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 447 transitions. [2021-01-06 10:33:55,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:33:55,144 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 447 transitions. [2021-01-06 10:33:55,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 10:33:55,145 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:55,145 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:55,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:33:55,359 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:55,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1118361267, now seen corresponding path program 4 times [2021-01-06 10:33:55,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:55,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398234156] [2021-01-06 10:33:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-01-06 10:33:55,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398234156] [2021-01-06 10:33:55,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952149722] [2021-01-06 10:33:55,535 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 10:33:55,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:33:55,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:33:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-01-06 10:33:55,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:33:55,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:33:55,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075037132] [2021-01-06 10:33:55,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:33:55,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:55,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:33:55,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:33:55,879 INFO L87 Difference]: Start difference. First operand 311 states and 447 transitions. Second operand 12 states. [2021-01-06 10:33:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:55,974 INFO L93 Difference]: Finished difference Result 606 states and 878 transitions. [2021-01-06 10:33:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:33:55,974 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 90 [2021-01-06 10:33:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:55,981 INFO L225 Difference]: With dead ends: 606 [2021-01-06 10:33:55,981 INFO L226 Difference]: Without dead ends: 314 [2021-01-06 10:33:55,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:33:55,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-01-06 10:33:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2021-01-06 10:33:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2021-01-06 10:33:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 449 transitions. [2021-01-06 10:33:55,994 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 449 transitions. Word has length 90 [2021-01-06 10:33:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:55,994 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 449 transitions. [2021-01-06 10:33:55,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:33:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 449 transitions. [2021-01-06 10:33:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-01-06 10:33:55,995 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:55,996 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:56,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:33:56,210 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:56,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:56,211 INFO L82 PathProgramCache]: Analyzing trace with hash 942996789, now seen corresponding path program 5 times [2021-01-06 10:33:56,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:56,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024090268] [2021-01-06 10:33:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-01-06 10:33:56,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024090268] [2021-01-06 10:33:56,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453881602] [2021-01-06 10:33:56,472 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 10:33:56,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 10:33:56,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:56,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:33:56,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-01-06 10:33:57,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:33:57,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2021-01-06 10:33:57,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31589821] [2021-01-06 10:33:57,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:33:57,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:57,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:33:57,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:33:57,188 INFO L87 Difference]: Start difference. First operand 313 states and 449 transitions. Second operand 16 states. [2021-01-06 10:33:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:57,312 INFO L93 Difference]: Finished difference Result 614 states and 888 transitions. [2021-01-06 10:33:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:33:57,313 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 92 [2021-01-06 10:33:57,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:57,315 INFO L225 Difference]: With dead ends: 614 [2021-01-06 10:33:57,316 INFO L226 Difference]: Without dead ends: 322 [2021-01-06 10:33:57,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:33:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-01-06 10:33:57,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2021-01-06 10:33:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2021-01-06 10:33:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 455 transitions. [2021-01-06 10:33:57,331 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 455 transitions. Word has length 92 [2021-01-06 10:33:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:57,333 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 455 transitions. [2021-01-06 10:33:57,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:33:57,333 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 455 transitions. [2021-01-06 10:33:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 10:33:57,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:57,338 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:57,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:33:57,554 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:57,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:57,555 INFO L82 PathProgramCache]: Analyzing trace with hash 626578041, now seen corresponding path program 6 times [2021-01-06 10:33:57,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:57,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378441781] [2021-01-06 10:33:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:33:57,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378441781] [2021-01-06 10:33:57,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981914474] [2021-01-06 10:33:57,785 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 10:33:58,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:33:58,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:58,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:33:58,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:58,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:33:58,386 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2021-01-06 10:33:58,389 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:58,397 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:58,400 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:58,400 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-01-06 10:33:58,437 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:33:58,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:33:58,490 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 10:33:58,492 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:58,499 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:58,500 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:58,500 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-01-06 10:33:58,552 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:33:58,553 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:58,560 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:58,562 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:58,562 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2021-01-06 10:33:58,654 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:58,654 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-01-06 10:33:58,657 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:33:58,662 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:33:58,664 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 10:33:58,678 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:58,679 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:58,680 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:17 [2021-01-06 10:33:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-01-06 10:33:58,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:33:58,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-01-06 10:33:58,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49313341] [2021-01-06 10:33:58,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:33:58,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:58,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:33:58,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:33:58,863 INFO L87 Difference]: Start difference. First operand 319 states and 455 transitions. Second operand 21 states. [2021-01-06 10:34:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:02,605 INFO L93 Difference]: Finished difference Result 1547 states and 2220 transitions. [2021-01-06 10:34:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 10:34:02,606 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2021-01-06 10:34:02,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:02,613 INFO L225 Difference]: With dead ends: 1547 [2021-01-06 10:34:02,613 INFO L226 Difference]: Without dead ends: 1251 [2021-01-06 10:34:02,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=520, Invalid=2786, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 10:34:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-01-06 10:34:02,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 523. [2021-01-06 10:34:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2021-01-06 10:34:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 751 transitions. [2021-01-06 10:34:02,643 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 751 transitions. Word has length 96 [2021-01-06 10:34:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:02,644 INFO L481 AbstractCegarLoop]: Abstraction has 523 states and 751 transitions. [2021-01-06 10:34:02,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:34:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 751 transitions. [2021-01-06 10:34:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 10:34:02,645 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:02,646 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:02,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:02,862 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:02,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:02,863 INFO L82 PathProgramCache]: Analyzing trace with hash -2062064535, now seen corresponding path program 1 times [2021-01-06 10:34:02,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:02,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400926557] [2021-01-06 10:34:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:34:03,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400926557] [2021-01-06 10:34:03,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898816575] [2021-01-06 10:34:03,083 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 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 10:34:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:03,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:34:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:34:03,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:03,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 10:34:03,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708708953] [2021-01-06 10:34:03,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:34:03,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:03,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:34:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:34:03,402 INFO L87 Difference]: Start difference. First operand 523 states and 751 transitions. Second operand 15 states. [2021-01-06 10:34:03,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:03,486 INFO L93 Difference]: Finished difference Result 1024 states and 1480 transitions. [2021-01-06 10:34:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:34:03,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2021-01-06 10:34:03,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:03,492 INFO L225 Difference]: With dead ends: 1024 [2021-01-06 10:34:03,492 INFO L226 Difference]: Without dead ends: 526 [2021-01-06 10:34:03,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:34:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-01-06 10:34:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 525. [2021-01-06 10:34:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2021-01-06 10:34:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 753 transitions. [2021-01-06 10:34:03,517 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 753 transitions. Word has length 98 [2021-01-06 10:34:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:03,517 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 753 transitions. [2021-01-06 10:34:03,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:34:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 753 transitions. [2021-01-06 10:34:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 10:34:03,519 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:03,519 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:03,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:34:03,733 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:03,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:03,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1579292437, now seen corresponding path program 2 times [2021-01-06 10:34:03,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:03,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806497587] [2021-01-06 10:34:03,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:34:04,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806497587] [2021-01-06 10:34:04,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205756316] [2021-01-06 10:34:04,067 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 10:34:04,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:34:04,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:34:04,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:34:04,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:04,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:34:04,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034238288] [2021-01-06 10:34:04,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:34:04,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:04,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:34:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:34:04,397 INFO L87 Difference]: Start difference. First operand 525 states and 753 transitions. Second operand 16 states. [2021-01-06 10:34:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:04,487 INFO L93 Difference]: Finished difference Result 1026 states and 1482 transitions. [2021-01-06 10:34:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:34:04,488 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 100 [2021-01-06 10:34:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:04,491 INFO L225 Difference]: With dead ends: 1026 [2021-01-06 10:34:04,491 INFO L226 Difference]: Without dead ends: 528 [2021-01-06 10:34:04,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:34:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-01-06 10:34:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 527. [2021-01-06 10:34:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2021-01-06 10:34:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 755 transitions. [2021-01-06 10:34:04,522 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 755 transitions. Word has length 100 [2021-01-06 10:34:04,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:04,522 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 755 transitions. [2021-01-06 10:34:04,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:34:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 755 transitions. [2021-01-06 10:34:04,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 10:34:04,524 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:04,524 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:04,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:34:04,725 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:04,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:04,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1491774227, now seen corresponding path program 3 times [2021-01-06 10:34:04,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:04,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606693216] [2021-01-06 10:34:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:34:05,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606693216] [2021-01-06 10:34:05,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468128878] [2021-01-06 10:34:05,092 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 10:34:05,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:34:05,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:05,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:34:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:05,465 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 10:34:05,466 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:34:05,474 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:34:05,476 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:34:05,476 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-01-06 10:34:05,675 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:34:05,752 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:34:05,898 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:34:05,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:34:05,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:34:05,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:34:05,936 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2021-01-06 10:34:05,939 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:34:05,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:34:05,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:34:05,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:34:05,957 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2021-01-06 10:34:05,960 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:34:05,998 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:34:06,007 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-01-06 10:34:06,007 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:81, output treesize:37 [2021-01-06 10:34:06,227 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:34:06,253 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:34:06,254 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-01-06 10:34:06,256 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 10:34:06,269 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:34:06,269 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-01-06 10:34:06,271 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-01-06 10:34:06,330 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:34:06,333 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:34:06,338 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:34:06,339 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 10:34:06,340 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:71, output treesize:35 [2021-01-06 10:34:06,487 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:34:06,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:34:06,495 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:34:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-01-06 10:34:06,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:06,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-01-06 10:34:06,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122970448] [2021-01-06 10:34:06,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:34:06,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:06,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:34:06,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:34:06,692 INFO L87 Difference]: Start difference. First operand 527 states and 755 transitions. Second operand 28 states. [2021-01-06 10:34:09,263 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-01-06 10:34:09,476 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-01-06 10:34:10,311 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-01-06 10:34:10,729 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-01-06 10:34:11,091 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-01-06 10:34:11,348 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-01-06 10:34:12,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:12,811 INFO L93 Difference]: Finished difference Result 1828 states and 2551 transitions. [2021-01-06 10:34:12,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 10:34:12,812 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 102 [2021-01-06 10:34:12,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:12,819 INFO L225 Difference]: With dead ends: 1828 [2021-01-06 10:34:12,819 INFO L226 Difference]: Without dead ends: 1330 [2021-01-06 10:34:12,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=697, Invalid=2725, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 10:34:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-01-06 10:34:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 729. [2021-01-06 10:34:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2021-01-06 10:34:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1053 transitions. [2021-01-06 10:34:12,877 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1053 transitions. Word has length 102 [2021-01-06 10:34:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:12,877 INFO L481 AbstractCegarLoop]: Abstraction has 729 states and 1053 transitions. [2021-01-06 10:34:12,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:34:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1053 transitions. [2021-01-06 10:34:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:34:12,879 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:12,880 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:13,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:13,093 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:13,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:13,093 INFO L82 PathProgramCache]: Analyzing trace with hash 510507953, now seen corresponding path program 1 times [2021-01-06 10:34:13,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:13,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791227134] [2021-01-06 10:34:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:13,480 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 10:34:13,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791227134] [2021-01-06 10:34:13,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141643705] [2021-01-06 10:34:13,481 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 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 10:34:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:13,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:34:13,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:13,866 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 10:34:13,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:13,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:34:13,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346218807] [2021-01-06 10:34:13,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:34:13,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:13,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:34:13,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:34:13,868 INFO L87 Difference]: Start difference. First operand 729 states and 1053 transitions. Second operand 19 states. [2021-01-06 10:34:14,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:14,024 INFO L93 Difference]: Finished difference Result 1428 states and 2076 transitions. [2021-01-06 10:34:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:34:14,025 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 106 [2021-01-06 10:34:14,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:14,029 INFO L225 Difference]: With dead ends: 1428 [2021-01-06 10:34:14,029 INFO L226 Difference]: Without dead ends: 732 [2021-01-06 10:34:14,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:34:14,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-01-06 10:34:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 731. [2021-01-06 10:34:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2021-01-06 10:34:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1055 transitions. [2021-01-06 10:34:14,077 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1055 transitions. Word has length 106 [2021-01-06 10:34:14,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:14,078 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1055 transitions. [2021-01-06 10:34:14,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:34:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1055 transitions. [2021-01-06 10:34:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-01-06 10:34:14,080 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:14,080 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:14,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:14,294 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:14,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1456431565, now seen corresponding path program 2 times [2021-01-06 10:34:14,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:14,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945428793] [2021-01-06 10:34:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:14,697 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 10:34:14,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945428793] [2021-01-06 10:34:14,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047915959] [2021-01-06 10:34:14,698 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 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 10:34:14,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:34:14,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:34:14,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:15,075 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 10:34:15,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:15,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:34:15,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273849627] [2021-01-06 10:34:15,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:34:15,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:15,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:34:15,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:34:15,078 INFO L87 Difference]: Start difference. First operand 731 states and 1055 transitions. Second operand 20 states. [2021-01-06 10:34:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:15,238 INFO L93 Difference]: Finished difference Result 1430 states and 2078 transitions. [2021-01-06 10:34:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:34:15,239 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 108 [2021-01-06 10:34:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:15,243 INFO L225 Difference]: With dead ends: 1430 [2021-01-06 10:34:15,244 INFO L226 Difference]: Without dead ends: 734 [2021-01-06 10:34:15,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:34:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-01-06 10:34:15,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 733. [2021-01-06 10:34:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2021-01-06 10:34:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1057 transitions. [2021-01-06 10:34:15,300 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1057 transitions. Word has length 108 [2021-01-06 10:34:15,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:15,300 INFO L481 AbstractCegarLoop]: Abstraction has 733 states and 1057 transitions. [2021-01-06 10:34:15,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:34:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1057 transitions. [2021-01-06 10:34:15,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 10:34:15,303 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:15,303 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:15,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:15,518 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:15,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:15,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1899698123, now seen corresponding path program 3 times [2021-01-06 10:34:15,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:15,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341392528] [2021-01-06 10:34:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:15,998 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 10:34:15,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341392528] [2021-01-06 10:34:15,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677879508] [2021-01-06 10:34:15,998 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 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 10:34:16,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:34:16,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:16,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 10:34:16,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:16,312 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 10:34:16,313 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:34:16,320 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:34:16,322 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:34:16,322 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-01-06 10:34:16,889 INFO L348 Elim1Store]: treesize reduction 49, result has 59.5 percent of original size [2021-01-06 10:34:16,890 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 84 [2021-01-06 10:34:16,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:34:16,893 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 10:34:16,896 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:34:16,972 INFO L625 ElimStorePlain]: treesize reduction 66, result has 31.3 percent of original size [2021-01-06 10:34:16,976 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:34:16,976 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:21 [2021-01-06 10:34:17,134 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:34:17,135 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-01-06 10:34:17,136 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:34:17,139 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 10:34:17,156 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:34:17,162 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:34:17,165 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:34:17,165 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:14 [2021-01-06 10:34:17,232 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 10:34:17,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:34:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-01-06 10:34:17,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:17,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 33 [2021-01-06 10:34:17,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317556753] [2021-01-06 10:34:17,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:34:17,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:34:17,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:34:17,378 INFO L87 Difference]: Start difference. First operand 733 states and 1057 transitions. Second operand 33 states. [2021-01-06 10:34:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:21,148 INFO L93 Difference]: Finished difference Result 1950 states and 2745 transitions. [2021-01-06 10:34:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:34:21,149 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 110 [2021-01-06 10:34:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:21,155 INFO L225 Difference]: With dead ends: 1950 [2021-01-06 10:34:21,156 INFO L226 Difference]: Without dead ends: 1254 [2021-01-06 10:34:21,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=630, Invalid=2676, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 10:34:21,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-01-06 10:34:21,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 830. [2021-01-06 10:34:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2021-01-06 10:34:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1200 transitions. [2021-01-06 10:34:21,225 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1200 transitions. Word has length 110 [2021-01-06 10:34:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:21,225 INFO L481 AbstractCegarLoop]: Abstraction has 830 states and 1200 transitions. [2021-01-06 10:34:21,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:34:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1200 transitions. [2021-01-06 10:34:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-06 10:34:21,227 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:21,228 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-01-06 10:34:21,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:34:21,442 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:21,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:21,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2095306953, now seen corresponding path program 1 times [2021-01-06 10:34:21,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:21,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714460447] [2021-01-06 10:34:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-01-06 10:34:21,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714460447] [2021-01-06 10:34:21,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834023900] [2021-01-06 10:34:21,945 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 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 10:34:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:22,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:34:22,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-01-06 10:34:22,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:22,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 10:34:22,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630439809] [2021-01-06 10:34:22,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:34:22,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:22,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:34:22,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:34:22,286 INFO L87 Difference]: Start difference. First operand 830 states and 1200 transitions. Second operand 23 states. [2021-01-06 10:34:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:22,432 INFO L93 Difference]: Finished difference Result 1622 states and 2362 transitions. [2021-01-06 10:34:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:34:22,432 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 115 [2021-01-06 10:34:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:22,436 INFO L225 Difference]: With dead ends: 1622 [2021-01-06 10:34:22,436 INFO L226 Difference]: Without dead ends: 833 [2021-01-06 10:34:22,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:34:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-01-06 10:34:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 832. [2021-01-06 10:34:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2021-01-06 10:34:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1202 transitions. [2021-01-06 10:34:22,500 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1202 transitions. Word has length 115 [2021-01-06 10:34:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:22,501 INFO L481 AbstractCegarLoop]: Abstraction has 832 states and 1202 transitions. [2021-01-06 10:34:22,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:34:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1202 transitions. [2021-01-06 10:34:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 10:34:22,503 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:22,503 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-01-06 10:34:22,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:34:22,720 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:22,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:22,721 INFO L82 PathProgramCache]: Analyzing trace with hash -812996473, now seen corresponding path program 2 times [2021-01-06 10:34:22,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:22,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886040936] [2021-01-06 10:34:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-01-06 10:34:23,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886040936] [2021-01-06 10:34:23,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309568701] [2021-01-06 10:34:23,302 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 10:34:23,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:34:23,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:23,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:34:23,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-01-06 10:34:23,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:23,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 10:34:23,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954800442] [2021-01-06 10:34:23,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:34:23,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:23,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:34:23,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:34:23,680 INFO L87 Difference]: Start difference. First operand 832 states and 1202 transitions. Second operand 24 states. [2021-01-06 10:34:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:23,854 INFO L93 Difference]: Finished difference Result 1624 states and 2364 transitions. [2021-01-06 10:34:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 10:34:23,855 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2021-01-06 10:34:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:23,859 INFO L225 Difference]: With dead ends: 1624 [2021-01-06 10:34:23,859 INFO L226 Difference]: Without dead ends: 835 [2021-01-06 10:34:23,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:34:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-01-06 10:34:23,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 834. [2021-01-06 10:34:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2021-01-06 10:34:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1204 transitions. [2021-01-06 10:34:23,922 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1204 transitions. Word has length 117 [2021-01-06 10:34:23,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:23,922 INFO L481 AbstractCegarLoop]: Abstraction has 834 states and 1204 transitions. [2021-01-06 10:34:23,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:34:23,922 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1204 transitions. [2021-01-06 10:34:23,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-01-06 10:34:23,925 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:23,925 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-01-06 10:34:24,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:24,140 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:24,140 INFO L82 PathProgramCache]: Analyzing trace with hash 331120837, now seen corresponding path program 3 times [2021-01-06 10:34:24,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:24,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400183036] [2021-01-06 10:34:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-01-06 10:34:24,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400183036] [2021-01-06 10:34:24,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667523012] [2021-01-06 10:34:24,810 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 10:34:25,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:34:25,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:25,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:34:25,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-01-06 10:34:25,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:25,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7] total 29 [2021-01-06 10:34:25,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815660998] [2021-01-06 10:34:25,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:34:25,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:25,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:34:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:34:25,428 INFO L87 Difference]: Start difference. First operand 834 states and 1204 transitions. Second operand 29 states. [2021-01-06 10:34:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:25,870 INFO L93 Difference]: Finished difference Result 2114 states and 3096 transitions. [2021-01-06 10:34:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:34:25,871 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 119 [2021-01-06 10:34:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:25,877 INFO L225 Difference]: With dead ends: 2114 [2021-01-06 10:34:25,877 INFO L226 Difference]: Without dead ends: 1325 [2021-01-06 10:34:25,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:34:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-01-06 10:34:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1046. [2021-01-06 10:34:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1046 states. [2021-01-06 10:34:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1521 transitions. [2021-01-06 10:34:25,957 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1521 transitions. Word has length 119 [2021-01-06 10:34:25,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:25,957 INFO L481 AbstractCegarLoop]: Abstraction has 1046 states and 1521 transitions. [2021-01-06 10:34:25,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:34:25,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1521 transitions. [2021-01-06 10:34:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-01-06 10:34:25,960 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:25,961 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:26,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:34:26,175 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:26,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:26,176 INFO L82 PathProgramCache]: Analyzing trace with hash -215992834, now seen corresponding path program 4 times [2021-01-06 10:34:26,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:26,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288330411] [2021-01-06 10:34:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-01-06 10:34:26,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288330411] [2021-01-06 10:34:26,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462788790] [2021-01-06 10:34:26,824 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 10:34:27,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:34:27,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:27,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:34:27,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-01-06 10:34:27,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:27,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 10:34:27,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000644912] [2021-01-06 10:34:27,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:34:27,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:27,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:34:27,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:34:27,254 INFO L87 Difference]: Start difference. First operand 1046 states and 1521 transitions. Second operand 26 states. [2021-01-06 10:34:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:27,430 INFO L93 Difference]: Finished difference Result 2048 states and 2998 transitions. [2021-01-06 10:34:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:34:27,430 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 133 [2021-01-06 10:34:27,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:27,435 INFO L225 Difference]: With dead ends: 2048 [2021-01-06 10:34:27,436 INFO L226 Difference]: Without dead ends: 1049 [2021-01-06 10:34:27,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:34:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-01-06 10:34:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1048. [2021-01-06 10:34:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2021-01-06 10:34:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1523 transitions. [2021-01-06 10:34:27,496 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1523 transitions. Word has length 133 [2021-01-06 10:34:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:27,496 INFO L481 AbstractCegarLoop]: Abstraction has 1048 states and 1523 transitions. [2021-01-06 10:34:27,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:34:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1523 transitions. [2021-01-06 10:34:27,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:34:27,499 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:27,500 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:27,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:27,715 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:27,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1849306564, now seen corresponding path program 5 times [2021-01-06 10:34:27,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:27,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159449541] [2021-01-06 10:34:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-01-06 10:34:28,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159449541] [2021-01-06 10:34:28,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541565503] [2021-01-06 10:34:28,527 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 10:34:29,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 10:34:29,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:29,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:34:29,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2021-01-06 10:34:30,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:30,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 8] total 32 [2021-01-06 10:34:30,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345518899] [2021-01-06 10:34:30,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:34:30,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:30,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:34:30,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:34:30,279 INFO L87 Difference]: Start difference. First operand 1048 states and 1523 transitions. Second operand 32 states. [2021-01-06 10:34:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:30,754 INFO L93 Difference]: Finished difference Result 2538 states and 3730 transitions. [2021-01-06 10:34:30,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:34:30,755 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2021-01-06 10:34:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:30,761 INFO L225 Difference]: With dead ends: 2538 [2021-01-06 10:34:30,762 INFO L226 Difference]: Without dead ends: 1539 [2021-01-06 10:34:30,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:34:30,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-01-06 10:34:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1260. [2021-01-06 10:34:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1260 states. [2021-01-06 10:34:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1840 transitions. [2021-01-06 10:34:30,836 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1840 transitions. Word has length 135 [2021-01-06 10:34:30,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:30,837 INFO L481 AbstractCegarLoop]: Abstraction has 1260 states and 1840 transitions. [2021-01-06 10:34:30,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:34:30,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1840 transitions. [2021-01-06 10:34:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-01-06 10:34:30,854 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:30,855 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:31,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:34:31,056 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:31,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:31,056 INFO L82 PathProgramCache]: Analyzing trace with hash 777408757, now seen corresponding path program 6 times [2021-01-06 10:34:31,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:31,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449272095] [2021-01-06 10:34:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-01-06 10:34:31,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449272095] [2021-01-06 10:34:31,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815332529] [2021-01-06 10:34:31,899 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 10:34:32,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:34:32,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:32,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:34:32,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-01-06 10:34:32,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:32,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7] total 32 [2021-01-06 10:34:32,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917120916] [2021-01-06 10:34:32,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:34:32,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:32,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:34:32,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=621, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:34:32,707 INFO L87 Difference]: Start difference. First operand 1260 states and 1840 transitions. Second operand 32 states. [2021-01-06 10:34:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:32,963 INFO L93 Difference]: Finished difference Result 2484 states and 3648 transitions. [2021-01-06 10:34:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:34:32,964 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 149 [2021-01-06 10:34:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:32,969 INFO L225 Difference]: With dead ends: 2484 [2021-01-06 10:34:32,970 INFO L226 Difference]: Without dead ends: 1275 [2021-01-06 10:34:32,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=371, Invalid=621, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:34:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-01-06 10:34:33,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1270. [2021-01-06 10:34:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1270 states. [2021-01-06 10:34:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1850 transitions. [2021-01-06 10:34:33,044 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1850 transitions. Word has length 149 [2021-01-06 10:34:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:33,045 INFO L481 AbstractCegarLoop]: Abstraction has 1270 states and 1850 transitions. [2021-01-06 10:34:33,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:34:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1850 transitions. [2021-01-06 10:34:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-01-06 10:34:33,048 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:33,048 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:33,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:34:33,261 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:33,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2037038129, now seen corresponding path program 7 times [2021-01-06 10:34:33,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:33,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244530206] [2021-01-06 10:34:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-01-06 10:34:34,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244530206] [2021-01-06 10:34:34,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061568839] [2021-01-06 10:34:34,145 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 10:34:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:34,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:34:34,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-01-06 10:34:34,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:34,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 10:34:34,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528694216] [2021-01-06 10:34:34,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:34:34,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:34,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:34:34,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:34:34,621 INFO L87 Difference]: Start difference. First operand 1270 states and 1850 transitions. Second operand 29 states. [2021-01-06 10:34:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:34,796 INFO L93 Difference]: Finished difference Result 2490 states and 3650 transitions. [2021-01-06 10:34:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:34:34,796 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 153 [2021-01-06 10:34:34,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:34,808 INFO L225 Difference]: With dead ends: 2490 [2021-01-06 10:34:34,808 INFO L226 Difference]: Without dead ends: 1273 [2021-01-06 10:34:34,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:34:34,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-01-06 10:34:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1272. [2021-01-06 10:34:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2021-01-06 10:34:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1852 transitions. [2021-01-06 10:34:34,882 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1852 transitions. Word has length 153 [2021-01-06 10:34:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:34,882 INFO L481 AbstractCegarLoop]: Abstraction has 1272 states and 1852 transitions. [2021-01-06 10:34:34,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:34:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1852 transitions. [2021-01-06 10:34:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-01-06 10:34:34,885 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:34,886 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:35,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:34:35,100 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:35,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:35,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1774858897, now seen corresponding path program 8 times [2021-01-06 10:34:35,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:35,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604387269] [2021-01-06 10:34:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-01-06 10:34:35,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604387269] [2021-01-06 10:34:35,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035270350] [2021-01-06 10:34:35,995 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 10:34:36,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:34:36,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:36,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:34:36,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-01-06 10:34:36,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:36,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 10:34:36,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936568088] [2021-01-06 10:34:36,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:34:36,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:36,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:34:36,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:34:36,502 INFO L87 Difference]: Start difference. First operand 1272 states and 1852 transitions. Second operand 30 states. [2021-01-06 10:34:36,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:36,746 INFO L93 Difference]: Finished difference Result 2492 states and 3652 transitions. [2021-01-06 10:34:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:34:36,747 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 155 [2021-01-06 10:34:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:36,752 INFO L225 Difference]: With dead ends: 2492 [2021-01-06 10:34:36,753 INFO L226 Difference]: Without dead ends: 1275 [2021-01-06 10:34:36,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:34:36,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-01-06 10:34:36,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1274. [2021-01-06 10:34:36,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2021-01-06 10:34:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1854 transitions. [2021-01-06 10:34:36,827 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1854 transitions. Word has length 155 [2021-01-06 10:34:36,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:36,827 INFO L481 AbstractCegarLoop]: Abstraction has 1274 states and 1854 transitions. [2021-01-06 10:34:36,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 10:34:36,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1854 transitions. [2021-01-06 10:34:36,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-01-06 10:34:36,830 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:36,830 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:37,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:37,045 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:37,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:37,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1400797395, now seen corresponding path program 9 times [2021-01-06 10:34:37,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:37,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507974952] [2021-01-06 10:34:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-01-06 10:34:38,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507974952] [2021-01-06 10:34:38,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040694339] [2021-01-06 10:34:38,103 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 10:34:38,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:34:38,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:38,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:34:38,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2021-01-06 10:34:38,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:38,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 8] total 36 [2021-01-06 10:34:38,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454588908] [2021-01-06 10:34:38,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:34:38,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:34:38,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=798, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:34:38,877 INFO L87 Difference]: Start difference. First operand 1274 states and 1854 transitions. Second operand 36 states. [2021-01-06 10:34:39,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:39,162 INFO L93 Difference]: Finished difference Result 2506 states and 3670 transitions. [2021-01-06 10:34:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 10:34:39,162 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 157 [2021-01-06 10:34:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:39,169 INFO L225 Difference]: With dead ends: 2506 [2021-01-06 10:34:39,169 INFO L226 Difference]: Without dead ends: 1289 [2021-01-06 10:34:39,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=462, Invalid=798, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:34:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-01-06 10:34:39,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1284. [2021-01-06 10:34:39,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1284 states. [2021-01-06 10:34:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 1864 transitions. [2021-01-06 10:34:39,242 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 1864 transitions. Word has length 157 [2021-01-06 10:34:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:39,242 INFO L481 AbstractCegarLoop]: Abstraction has 1284 states and 1864 transitions. [2021-01-06 10:34:39,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:34:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 1864 transitions. [2021-01-06 10:34:39,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 10:34:39,245 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:39,246 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:39,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 10:34:39,460 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:39,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1985763735, now seen corresponding path program 10 times [2021-01-06 10:34:39,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:39,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666615948] [2021-01-06 10:34:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-01-06 10:34:40,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666615948] [2021-01-06 10:34:40,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686868529] [2021-01-06 10:34:40,567 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 10:34:40,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:34:40,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:40,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:34:40,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2021-01-06 10:34:41,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:41,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 9] total 38 [2021-01-06 10:34:41,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871131482] [2021-01-06 10:34:41,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 10:34:41,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:41,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 10:34:41,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=906, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:34:41,453 INFO L87 Difference]: Start difference. First operand 1284 states and 1864 transitions. Second operand 38 states. [2021-01-06 10:34:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:41,948 INFO L93 Difference]: Finished difference Result 3000 states and 4402 transitions. [2021-01-06 10:34:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 10:34:41,949 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 161 [2021-01-06 10:34:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:41,955 INFO L225 Difference]: With dead ends: 3000 [2021-01-06 10:34:41,955 INFO L226 Difference]: Without dead ends: 1775 [2021-01-06 10:34:41,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=500, Invalid=906, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:34:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-01-06 10:34:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1496. [2021-01-06 10:34:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1496 states. [2021-01-06 10:34:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2181 transitions. [2021-01-06 10:34:42,039 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2181 transitions. Word has length 161 [2021-01-06 10:34:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:42,039 INFO L481 AbstractCegarLoop]: Abstraction has 1496 states and 2181 transitions. [2021-01-06 10:34:42,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 10:34:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2181 transitions. [2021-01-06 10:34:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-01-06 10:34:42,043 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:42,043 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:42,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:42,259 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:42,259 INFO L82 PathProgramCache]: Analyzing trace with hash 145572898, now seen corresponding path program 11 times [2021-01-06 10:34:42,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:42,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470677864] [2021-01-06 10:34:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-01-06 10:34:43,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470677864] [2021-01-06 10:34:43,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928861349] [2021-01-06 10:34:43,452 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 10:34:49,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 10:34:49,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:49,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:34:49,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-01-06 10:34:50,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:50,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 9] total 39 [2021-01-06 10:34:50,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179198557] [2021-01-06 10:34:50,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 10:34:50,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:50,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 10:34:50,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=951, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:34:50,117 INFO L87 Difference]: Start difference. First operand 1496 states and 2181 transitions. Second operand 39 states. [2021-01-06 10:34:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:50,476 INFO L93 Difference]: Finished difference Result 2946 states and 4320 transitions. [2021-01-06 10:34:50,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:34:50,477 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 175 [2021-01-06 10:34:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:50,482 INFO L225 Difference]: With dead ends: 2946 [2021-01-06 10:34:50,482 INFO L226 Difference]: Without dead ends: 1511 [2021-01-06 10:34:50,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=531, Invalid=951, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:34:50,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-01-06 10:34:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1506. [2021-01-06 10:34:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1506 states. [2021-01-06 10:34:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2191 transitions. [2021-01-06 10:34:50,553 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2191 transitions. Word has length 175 [2021-01-06 10:34:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:50,554 INFO L481 AbstractCegarLoop]: Abstraction has 1506 states and 2191 transitions. [2021-01-06 10:34:50,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 10:34:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2191 transitions. [2021-01-06 10:34:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-01-06 10:34:50,558 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:50,558 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:50,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 10:34:50,772 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:50,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:50,772 INFO L82 PathProgramCache]: Analyzing trace with hash 311743070, now seen corresponding path program 12 times [2021-01-06 10:34:50,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:50,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732719021] [2021-01-06 10:34:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-01-06 10:34:52,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732719021] [2021-01-06 10:34:52,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91385683] [2021-01-06 10:34:52,057 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 10:34:53,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 10:34:53,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:53,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:34:53,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1174 trivial. 0 not checked. [2021-01-06 10:34:53,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:53,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 10] total 41 [2021-01-06 10:34:53,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403829775] [2021-01-06 10:34:53,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:34:53,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:53,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:34:53,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=1068, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:34:53,889 INFO L87 Difference]: Start difference. First operand 1506 states and 2191 transitions. Second operand 41 states. [2021-01-06 10:34:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:54,264 INFO L93 Difference]: Finished difference Result 2964 states and 4338 transitions. [2021-01-06 10:34:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:34:54,265 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 179 [2021-01-06 10:34:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:54,272 INFO L225 Difference]: With dead ends: 2964 [2021-01-06 10:34:54,272 INFO L226 Difference]: Without dead ends: 1521 [2021-01-06 10:34:54,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=572, Invalid=1068, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:34:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-01-06 10:34:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1516. [2021-01-06 10:34:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1516 states. [2021-01-06 10:34:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2201 transitions. [2021-01-06 10:34:54,353 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2201 transitions. Word has length 179 [2021-01-06 10:34:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:54,353 INFO L481 AbstractCegarLoop]: Abstraction has 1516 states and 2201 transitions. [2021-01-06 10:34:54,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:34:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2201 transitions. [2021-01-06 10:34:54,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-01-06 10:34:54,359 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:54,359 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:54,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 10:34:54,574 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:54,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2047341210, now seen corresponding path program 13 times [2021-01-06 10:34:54,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:54,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193689235] [2021-01-06 10:34:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 10:34:55,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193689235] [2021-01-06 10:34:55,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873532273] [2021-01-06 10:34:55,955 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 10:34:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:56,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:34:56,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 10:34:56,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:56,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 10:34:56,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112570241] [2021-01-06 10:34:56,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:34:56,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:56,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:34:56,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:34:56,495 INFO L87 Difference]: Start difference. First operand 1516 states and 2201 transitions. Second operand 35 states. [2021-01-06 10:34:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:56,735 INFO L93 Difference]: Finished difference Result 2970 states and 4340 transitions. [2021-01-06 10:34:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:34:56,736 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 183 [2021-01-06 10:34:56,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:56,752 INFO L225 Difference]: With dead ends: 2970 [2021-01-06 10:34:56,753 INFO L226 Difference]: Without dead ends: 1519 [2021-01-06 10:34:56,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:34:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-01-06 10:34:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1518. [2021-01-06 10:34:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2021-01-06 10:34:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2203 transitions. [2021-01-06 10:34:56,816 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2203 transitions. Word has length 183 [2021-01-06 10:34:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:56,817 INFO L481 AbstractCegarLoop]: Abstraction has 1518 states and 2203 transitions. [2021-01-06 10:34:56,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:34:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2203 transitions. [2021-01-06 10:34:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-01-06 10:34:56,820 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:56,821 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:57,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 10:34:57,034 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash -415251624, now seen corresponding path program 14 times [2021-01-06 10:34:57,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:57,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539542663] [2021-01-06 10:34:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 10:34:58,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539542663] [2021-01-06 10:34:58,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154933071] [2021-01-06 10:34:58,472 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 10:34:58,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:34:58,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:58,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 10:34:58,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 10:34:59,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:34:59,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 10:34:59,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788425784] [2021-01-06 10:34:59,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:34:59,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:59,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:34:59,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:34:59,073 INFO L87 Difference]: Start difference. First operand 1518 states and 2203 transitions. Second operand 36 states. [2021-01-06 10:34:59,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:59,318 INFO L93 Difference]: Finished difference Result 2972 states and 4342 transitions. [2021-01-06 10:34:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 10:34:59,319 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 185 [2021-01-06 10:34:59,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:59,323 INFO L225 Difference]: With dead ends: 2972 [2021-01-06 10:34:59,323 INFO L226 Difference]: Without dead ends: 1521 [2021-01-06 10:34:59,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:34:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-01-06 10:34:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1520. [2021-01-06 10:34:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1520 states. [2021-01-06 10:34:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2205 transitions. [2021-01-06 10:34:59,387 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2205 transitions. Word has length 185 [2021-01-06 10:34:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:59,387 INFO L481 AbstractCegarLoop]: Abstraction has 1520 states and 2205 transitions. [2021-01-06 10:34:59,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:34:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2205 transitions. [2021-01-06 10:34:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-01-06 10:34:59,390 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:59,390 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:59,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 10:34:59,591 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash -439985002, now seen corresponding path program 15 times [2021-01-06 10:34:59,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:59,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562323097] [2021-01-06 10:34:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 10:35:01,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562323097] [2021-01-06 10:35:01,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870596318] [2021-01-06 10:35:01,102 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 10:35:01,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:35:01,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:01,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:35:01,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-01-06 10:35:02,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:02,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 10] total 44 [2021-01-06 10:35:02,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999545998] [2021-01-06 10:35:02,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 10:35:02,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:02,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 10:35:02,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=1218, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:35:02,406 INFO L87 Difference]: Start difference. First operand 1520 states and 2205 transitions. Second operand 44 states. [2021-01-06 10:35:02,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:02,989 INFO L93 Difference]: Finished difference Result 3462 states and 5074 transitions. [2021-01-06 10:35:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:35:02,990 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 187 [2021-01-06 10:35:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:02,997 INFO L225 Difference]: With dead ends: 3462 [2021-01-06 10:35:02,997 INFO L226 Difference]: Without dead ends: 2011 [2021-01-06 10:35:03,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=674, Invalid=1218, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:35:03,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-01-06 10:35:03,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1732. [2021-01-06 10:35:03,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2021-01-06 10:35:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2522 transitions. [2021-01-06 10:35:03,080 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2522 transitions. Word has length 187 [2021-01-06 10:35:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:03,080 INFO L481 AbstractCegarLoop]: Abstraction has 1732 states and 2522 transitions. [2021-01-06 10:35:03,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 10:35:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2522 transitions. [2021-01-06 10:35:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-01-06 10:35:03,083 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:03,084 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:03,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:35:03,290 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:03,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:03,291 INFO L82 PathProgramCache]: Analyzing trace with hash -986384049, now seen corresponding path program 16 times [2021-01-06 10:35:03,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:03,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891548188] [2021-01-06 10:35:03,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1581 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 10:35:04,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891548188] [2021-01-06 10:35:04,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134898410] [2021-01-06 10:35:04,794 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 10:35:05,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:35:05,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:05,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:35:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1581 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 10:35:05,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:05,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 10:35:05,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017077938] [2021-01-06 10:35:05,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 10:35:05,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:05,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 10:35:05,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:35:05,434 INFO L87 Difference]: Start difference. First operand 1732 states and 2522 transitions. Second operand 38 states. [2021-01-06 10:35:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:05,746 INFO L93 Difference]: Finished difference Result 3396 states and 4976 transitions. [2021-01-06 10:35:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:35:05,747 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 201 [2021-01-06 10:35:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:05,751 INFO L225 Difference]: With dead ends: 3396 [2021-01-06 10:35:05,751 INFO L226 Difference]: Without dead ends: 1735 [2021-01-06 10:35:05,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:35:05,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-01-06 10:35:05,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1734. [2021-01-06 10:35:05,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1734 states. [2021-01-06 10:35:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2524 transitions. [2021-01-06 10:35:05,843 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2524 transitions. Word has length 201 [2021-01-06 10:35:05,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:05,843 INFO L481 AbstractCegarLoop]: Abstraction has 1734 states and 2524 transitions. [2021-01-06 10:35:05,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 10:35:05,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2524 transitions. [2021-01-06 10:35:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-01-06 10:35:05,848 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:05,848 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:06,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:35:06,061 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:06,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:06,062 INFO L82 PathProgramCache]: Analyzing trace with hash 109926029, now seen corresponding path program 17 times [2021-01-06 10:35:06,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:06,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891835549] [2021-01-06 10:35:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-01-06 10:35:07,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891835549] [2021-01-06 10:35:07,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356888564] [2021-01-06 10:35:07,793 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 10:35:24,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-01-06 10:35:24,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:24,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:35:24,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1529 trivial. 0 not checked. [2021-01-06 10:35:25,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:25,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 11] total 47 [2021-01-06 10:35:25,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912406975] [2021-01-06 10:35:25,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:35:25,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:25,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:35:25,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=1405, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:35:25,029 INFO L87 Difference]: Start difference. First operand 1734 states and 2524 transitions. Second operand 47 states. [2021-01-06 10:35:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:25,679 INFO L93 Difference]: Finished difference Result 3886 states and 5708 transitions. [2021-01-06 10:35:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:35:25,680 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 203 [2021-01-06 10:35:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:25,684 INFO L225 Difference]: With dead ends: 3886 [2021-01-06 10:35:25,685 INFO L226 Difference]: Without dead ends: 2225 [2021-01-06 10:35:25,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=757, Invalid=1405, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:35:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-01-06 10:35:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1946. [2021-01-06 10:35:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1946 states. [2021-01-06 10:35:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2841 transitions. [2021-01-06 10:35:25,765 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2841 transitions. Word has length 203 [2021-01-06 10:35:25,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:25,765 INFO L481 AbstractCegarLoop]: Abstraction has 1946 states and 2841 transitions. [2021-01-06 10:35:25,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:35:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2841 transitions. [2021-01-06 10:35:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-01-06 10:35:25,770 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:25,770 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:25,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:35:25,985 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:25,985 INFO L82 PathProgramCache]: Analyzing trace with hash -173146938, now seen corresponding path program 18 times [2021-01-06 10:35:25,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:25,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425812959] [2021-01-06 10:35:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2021-01-06 10:35:27,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425812959] [2021-01-06 10:35:27,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606561668] [2021-01-06 10:35:27,699 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 10:35:28,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 10:35:28,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:28,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:35:28,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2021-01-06 10:35:29,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:29,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 11] total 48 [2021-01-06 10:35:29,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272415047] [2021-01-06 10:35:29,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 10:35:29,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:29,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 10:35:29,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=1461, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:35:29,858 INFO L87 Difference]: Start difference. First operand 1946 states and 2841 transitions. Second operand 48 states. [2021-01-06 10:35:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:30,262 INFO L93 Difference]: Finished difference Result 3832 states and 5626 transitions. [2021-01-06 10:35:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 10:35:30,263 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 217 [2021-01-06 10:35:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:30,266 INFO L225 Difference]: With dead ends: 3832 [2021-01-06 10:35:30,267 INFO L226 Difference]: Without dead ends: 1961 [2021-01-06 10:35:30,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=795, Invalid=1461, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:35:30,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-01-06 10:35:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1956. [2021-01-06 10:35:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1956 states. [2021-01-06 10:35:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 2851 transitions. [2021-01-06 10:35:30,336 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 2851 transitions. Word has length 217 [2021-01-06 10:35:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:30,336 INFO L481 AbstractCegarLoop]: Abstraction has 1956 states and 2851 transitions. [2021-01-06 10:35:30,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 10:35:30,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 2851 transitions. [2021-01-06 10:35:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-01-06 10:35:30,341 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:30,341 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:30,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:35:30,555 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:30,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2044724222, now seen corresponding path program 19 times [2021-01-06 10:35:30,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:30,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744411800] [2021-01-06 10:35:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2021-01-06 10:35:32,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744411800] [2021-01-06 10:35:32,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762383603] [2021-01-06 10:35:32,496 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 10:35:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:32,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:35:32,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2021-01-06 10:35:33,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:33,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 10:35:33,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905445668] [2021-01-06 10:35:33,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:35:33,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:33,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:35:33,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:35:33,163 INFO L87 Difference]: Start difference. First operand 1956 states and 2851 transitions. Second operand 41 states. [2021-01-06 10:35:33,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:33,473 INFO L93 Difference]: Finished difference Result 3838 states and 5628 transitions. [2021-01-06 10:35:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:35:33,474 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 221 [2021-01-06 10:35:33,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:33,478 INFO L225 Difference]: With dead ends: 3838 [2021-01-06 10:35:33,478 INFO L226 Difference]: Without dead ends: 1959 [2021-01-06 10:35:33,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:35:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-01-06 10:35:33,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1958. [2021-01-06 10:35:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1958 states. [2021-01-06 10:35:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2853 transitions. [2021-01-06 10:35:33,549 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2853 transitions. Word has length 221 [2021-01-06 10:35:33,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:33,549 INFO L481 AbstractCegarLoop]: Abstraction has 1958 states and 2853 transitions. [2021-01-06 10:35:33,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:35:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2853 transitions. [2021-01-06 10:35:33,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-01-06 10:35:33,553 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:33,554 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:33,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:33,769 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:33,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1236487744, now seen corresponding path program 20 times [2021-01-06 10:35:33,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:33,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39484687] [2021-01-06 10:35:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2021-01-06 10:35:35,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39484687] [2021-01-06 10:35:35,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301125901] [2021-01-06 10:35:35,753 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 10:35:36,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:35:36,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:36,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 10:35:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2021-01-06 10:35:36,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:36,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 10:35:36,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493454955] [2021-01-06 10:35:36,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 10:35:36,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:36,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 10:35:36,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:35:36,472 INFO L87 Difference]: Start difference. First operand 1958 states and 2853 transitions. Second operand 42 states. [2021-01-06 10:35:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:36,779 INFO L93 Difference]: Finished difference Result 3840 states and 5630 transitions. [2021-01-06 10:35:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:35:36,780 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 223 [2021-01-06 10:35:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:36,783 INFO L225 Difference]: With dead ends: 3840 [2021-01-06 10:35:36,783 INFO L226 Difference]: Without dead ends: 1961 [2021-01-06 10:35:36,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:35:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-01-06 10:35:36,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1960. [2021-01-06 10:35:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1960 states. [2021-01-06 10:35:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 2855 transitions. [2021-01-06 10:35:36,848 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 2855 transitions. Word has length 223 [2021-01-06 10:35:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:36,848 INFO L481 AbstractCegarLoop]: Abstraction has 1960 states and 2855 transitions. [2021-01-06 10:35:36,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 10:35:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 2855 transitions. [2021-01-06 10:35:36,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-01-06 10:35:36,851 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:36,851 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:37,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:37,052 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:37,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:37,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1975191806, now seen corresponding path program 21 times [2021-01-06 10:35:37,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:37,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486750163] [2021-01-06 10:35:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2021-01-06 10:35:39,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486750163] [2021-01-06 10:35:39,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242824906] [2021-01-06 10:35:39,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:35:39,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:35:39,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:39,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:35:39,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1909 trivial. 0 not checked. [2021-01-06 10:35:40,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:40,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 12] total 52 [2021-01-06 10:35:40,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455796083] [2021-01-06 10:35:40,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 10:35:40,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:40,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 10:35:40,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=1726, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:35:40,889 INFO L87 Difference]: Start difference. First operand 1960 states and 2855 transitions. Second operand 52 states. [2021-01-06 10:35:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:41,602 INFO L93 Difference]: Finished difference Result 4330 states and 6362 transitions. [2021-01-06 10:35:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 10:35:41,603 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 225 [2021-01-06 10:35:41,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:41,608 INFO L225 Difference]: With dead ends: 4330 [2021-01-06 10:35:41,608 INFO L226 Difference]: Without dead ends: 2451 [2021-01-06 10:35:41,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=926, Invalid=1726, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:35:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-01-06 10:35:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2172. [2021-01-06 10:35:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2172 states. [2021-01-06 10:35:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 3172 transitions. [2021-01-06 10:35:41,725 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 3172 transitions. Word has length 225 [2021-01-06 10:35:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:41,725 INFO L481 AbstractCegarLoop]: Abstraction has 2172 states and 3172 transitions. [2021-01-06 10:35:41,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 10:35:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 3172 transitions. [2021-01-06 10:35:41,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-01-06 10:35:41,730 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:41,731 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:41,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 10:35:41,946 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:41,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:41,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1267584713, now seen corresponding path program 22 times [2021-01-06 10:35:41,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:41,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253614523] [2021-01-06 10:35:41,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-01-06 10:35:44,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253614523] [2021-01-06 10:35:44,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969297600] [2021-01-06 10:35:44,055 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 10:35:44,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:35:44,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:35:44,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 10:35:44,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:35:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-01-06 10:35:44,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:35:44,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 10:35:44,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787331148] [2021-01-06 10:35:44,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 10:35:44,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:35:44,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 10:35:44,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:35:44,798 INFO L87 Difference]: Start difference. First operand 2172 states and 3172 transitions. Second operand 44 states. [2021-01-06 10:35:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:35:45,102 INFO L93 Difference]: Finished difference Result 4264 states and 6264 transitions. [2021-01-06 10:35:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 10:35:45,103 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 239 [2021-01-06 10:35:45,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:35:45,107 INFO L225 Difference]: With dead ends: 4264 [2021-01-06 10:35:45,107 INFO L226 Difference]: Without dead ends: 2175 [2021-01-06 10:35:45,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:35:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-01-06 10:35:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 2174. [2021-01-06 10:35:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2174 states. [2021-01-06 10:35:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 3174 transitions. [2021-01-06 10:35:45,181 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 3174 transitions. Word has length 239 [2021-01-06 10:35:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:35:45,181 INFO L481 AbstractCegarLoop]: Abstraction has 2174 states and 3174 transitions. [2021-01-06 10:35:45,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 10:35:45,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 3174 transitions. [2021-01-06 10:35:45,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-01-06 10:35:45,186 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:35:45,186 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:35:45,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:35:45,402 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:35:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:35:45,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1004056565, now seen corresponding path program 23 times [2021-01-06 10:35:45,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:35:45,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255766871] [2021-01-06 10:35:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:35:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:35:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2333 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-01-06 10:35:47,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255766871] [2021-01-06 10:35:47,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011602185] [2021-01-06 10:35:47,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:03,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 10:38:03,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:03,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:38:03,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2333 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2143 trivial. 0 not checked. [2021-01-06 10:38:04,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:04,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 13] total 55 [2021-01-06 10:38:04,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109107709] [2021-01-06 10:38:04,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 10:38:04,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:04,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 10:38:04,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=1947, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 10:38:04,332 INFO L87 Difference]: Start difference. First operand 2174 states and 3174 transitions. Second operand 55 states. [2021-01-06 10:38:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:05,181 INFO L93 Difference]: Finished difference Result 4754 states and 6996 transitions. [2021-01-06 10:38:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 10:38:05,182 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 241 [2021-01-06 10:38:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:05,189 INFO L225 Difference]: With dead ends: 4754 [2021-01-06 10:38:05,189 INFO L226 Difference]: Without dead ends: 2665 [2021-01-06 10:38:05,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1023, Invalid=1947, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 10:38:05,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-01-06 10:38:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2386. [2021-01-06 10:38:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2386 states. [2021-01-06 10:38:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 3491 transitions. [2021-01-06 10:38:05,330 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 3491 transitions. Word has length 241 [2021-01-06 10:38:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:05,330 INFO L481 AbstractCegarLoop]: Abstraction has 2386 states and 3491 transitions. [2021-01-06 10:38:05,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 10:38:05,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 3491 transitions. [2021-01-06 10:38:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-01-06 10:38:05,336 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:05,337 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:05,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:05,538 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:05,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:05,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1261362770, now seen corresponding path program 24 times [2021-01-06 10:38:05,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:05,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193819086] [2021-01-06 10:38:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat