/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-examples/relax-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:48:25,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:48:25,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:48:25,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:48:25,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:48:25,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:48:25,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:48:25,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:48:25,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:48:25,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:48:25,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:48:25,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:48:25,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:48:25,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:48:25,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:48:25,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:48:25,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:48:25,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:48:25,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:48:25,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:48:25,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:48:25,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:48:25,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:48:25,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:48:25,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:48:25,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 23:48:25,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 23:48:25,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 23:48:25,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 23:48:25,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 23:48:25,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 23:48:25,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 23:48:25,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 23:48:25,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:48:25,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:48:25,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:48:25,402 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:48:25,431 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:48:25,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:48:25,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:48:25,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:48:25,434 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:48:25,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:48:25,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:48:25,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:48:25,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:48:25,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:48:25,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:48:25,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:48:25,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:48:25,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:48:25,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:48:25,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:48:25,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:48:25,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:48:25,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:48:25,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:48:25,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:48:25,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:48:25,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:48:25,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:48:25,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:48:25,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:48:25,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:48:25,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:48:25,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:48:25,847 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:48:25,848 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:48:25,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/relax-2.i [2020-12-22 23:48:25,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fe53be608/8bfb10a1d93c49599e095426c8a7de8d/FLAGcf130946f [2020-12-22 23:48:26,637 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:48:26,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2.i [2020-12-22 23:48:26,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fe53be608/8bfb10a1d93c49599e095426c8a7de8d/FLAGcf130946f [2020-12-22 23:48:26,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fe53be608/8bfb10a1d93c49599e095426c8a7de8d [2020-12-22 23:48:26,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:48:26,949 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:48:26,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:26,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:48:26,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:48:26,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:26" (1/1) ... [2020-12-22 23:48:26,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a1d2ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:26, skipping insertion in model container [2020-12-22 23:48:26,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:26" (1/1) ... [2020-12-22 23:48:26,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:48:27,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:48:27,289 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-examples/relax-2.i[980,993] left hand side expression in assignment: lhs: VariableLHS[~shift~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pat~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~pat~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~different~0,] [2020-12-22 23:48:27,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:27,540 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:48:27,561 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-examples/relax-2.i[980,993] left hand side expression in assignment: lhs: VariableLHS[~shift~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pat~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~pat~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~different~0,] [2020-12-22 23:48:27,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:27,672 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:48:27,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27 WrapperNode [2020-12-22 23:48:27,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:27,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:27,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:48:27,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:48:27,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:27,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:48:27,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:48:27,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:48:27,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:48:27,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:48:27,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:48:27,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:48:27,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:48:27,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:48:27,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:48:27,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 23:48:27,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:48:27,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:48:27,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:48:27,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:48:28,374 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:48:28,374 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 23:48:28,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:28 BoogieIcfgContainer [2020-12-22 23:48:28,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:48:28,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:48:28,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:48:28,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:48:28,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:48:26" (1/3) ... [2020-12-22 23:48:28,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1d6b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:28, skipping insertion in model container [2020-12-22 23:48:28,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (2/3) ... [2020-12-22 23:48:28,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1d6b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:28, skipping insertion in model container [2020-12-22 23:48:28,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:28" (3/3) ... [2020-12-22 23:48:28,390 INFO L111 eAbstractionObserver]: Analyzing ICFG relax-2.i [2020-12-22 23:48:28,406 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:48:28,413 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 23:48:28,459 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 23:48:28,491 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:48:28,491 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:48:28,492 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:48:28,492 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:48:28,492 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:48:28,492 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:48:28,492 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:48:28,493 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:48:28,510 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-12-22 23:48:28,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 23:48:28,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,517 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash -781886477, now seen corresponding path program 1 times [2020-12-22 23:48:28,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426224096] [2020-12-22 23:48:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:28,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426224096] [2020-12-22 23:48:28,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:28,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 23:48:28,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680867213] [2020-12-22 23:48:28,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:48:28,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:48:28,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:48:28,814 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 4 states. [2020-12-22 23:48:28,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:28,892 INFO L93 Difference]: Finished difference Result 107 states and 163 transitions. [2020-12-22 23:48:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:28,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-22 23:48:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:28,910 INFO L225 Difference]: With dead ends: 107 [2020-12-22 23:48:28,910 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 23:48:28,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 23:48:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-12-22 23:48:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 23:48:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2020-12-22 23:48:28,969 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 11 [2020-12-22 23:48:28,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:28,970 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2020-12-22 23:48:28,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:48:28,970 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2020-12-22 23:48:28,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 23:48:28,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:48:28,974 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1280852140, now seen corresponding path program 1 times [2020-12-22 23:48:28,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182184670] [2020-12-22 23:48:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:29,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182184670] [2020-12-22 23:48:29,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:29,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 23:48:29,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831939142] [2020-12-22 23:48:29,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:48:29,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:48:29,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:29,150 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 5 states. [2020-12-22 23:48:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,321 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2020-12-22 23:48:29,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 23:48:29,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-22 23:48:29,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,325 INFO L225 Difference]: With dead ends: 98 [2020-12-22 23:48:29,325 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 23:48:29,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:29,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 23:48:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-12-22 23:48:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 23:48:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2020-12-22 23:48:29,340 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 13 [2020-12-22 23:48:29,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,341 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2020-12-22 23:48:29,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:48:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2020-12-22 23:48:29,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 23:48:29,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:29,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 23:48:29,343 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1030019396, now seen corresponding path program 1 times [2020-12-22 23:48:29,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960621145] [2020-12-22 23:48:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:29,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960621145] [2020-12-22 23:48:29,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:29,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 23:48:29,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693654214] [2020-12-22 23:48:29,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:48:29,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:48:29,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:29,474 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand 5 states. [2020-12-22 23:48:29,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,623 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2020-12-22 23:48:29,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 23:48:29,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 23:48:29,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,625 INFO L225 Difference]: With dead ends: 78 [2020-12-22 23:48:29,625 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 23:48:29,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:29,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 23:48:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-12-22 23:48:29,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 23:48:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2020-12-22 23:48:29,635 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 15 [2020-12-22 23:48:29,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,636 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2020-12-22 23:48:29,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:48:29,636 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2020-12-22 23:48:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 23:48:29,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:29,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 23:48:29,638 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1378443542, now seen corresponding path program 1 times [2020-12-22 23:48:29,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441728052] [2020-12-22 23:48:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:29,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441728052] [2020-12-22 23:48:29,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754972413] [2020-12-22 23:48:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:30,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:48:30,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:30,203 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:30,212 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 23:48:30,227 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:48:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:30,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:48:30,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2020-12-22 23:48:30,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512364679] [2020-12-22 23:48:30,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:48:30,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:30,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:48:30,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:48:30,255 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 5 states. [2020-12-22 23:48:30,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:30,374 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2020-12-22 23:48:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 23:48:30,375 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 23:48:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:30,376 INFO L225 Difference]: With dead ends: 71 [2020-12-22 23:48:30,376 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 23:48:30,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:48:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 23:48:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-12-22 23:48:30,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 23:48:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2020-12-22 23:48:30,385 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 15 [2020-12-22 23:48:30,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:30,386 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2020-12-22 23:48:30,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:48:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2020-12-22 23:48:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 23:48:30,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:30,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:30,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:30,601 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:30,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:30,603 INFO L82 PathProgramCache]: Analyzing trace with hash -2039170691, now seen corresponding path program 1 times [2020-12-22 23:48:30,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:30,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936317351] [2020-12-22 23:48:30,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:30,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936317351] [2020-12-22 23:48:30,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:30,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 23:48:30,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152710014] [2020-12-22 23:48:30,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:48:30,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:30,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:48:30,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:48:30,651 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 4 states. [2020-12-22 23:48:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:30,704 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2020-12-22 23:48:30,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:30,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-22 23:48:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:30,709 INFO L225 Difference]: With dead ends: 66 [2020-12-22 23:48:30,709 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 23:48:30,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 23:48:30,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 23:48:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 23:48:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2020-12-22 23:48:30,725 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 17 [2020-12-22 23:48:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:30,726 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2020-12-22 23:48:30,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:48:30,727 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2020-12-22 23:48:30,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 23:48:30,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:30,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:30,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 23:48:30,730 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:30,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:30,731 INFO L82 PathProgramCache]: Analyzing trace with hash 952350532, now seen corresponding path program 1 times [2020-12-22 23:48:30,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:30,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358772981] [2020-12-22 23:48:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:31,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358772981] [2020-12-22 23:48:31,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095000117] [2020-12-22 23:48:31,207 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:48:31,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:31,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:48:31,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2020-12-22 23:48:31,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764869445] [2020-12-22 23:48:31,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:48:31,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:31,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:48:31,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:48:31,327 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand 4 states. [2020-12-22 23:48:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:31,406 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-12-22 23:48:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:31,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-22 23:48:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:31,407 INFO L225 Difference]: With dead ends: 56 [2020-12-22 23:48:31,408 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 23:48:31,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 23:48:31,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 23:48:31,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 23:48:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-12-22 23:48:31,413 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 17 [2020-12-22 23:48:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:31,413 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-12-22 23:48:31,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:48:31,413 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-12-22 23:48:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 23:48:31,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:31,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:31,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:31,629 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:31,630 INFO L82 PathProgramCache]: Analyzing trace with hash 7602683, now seen corresponding path program 1 times [2020-12-22 23:48:31,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:31,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409218700] [2020-12-22 23:48:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:31,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409218700] [2020-12-22 23:48:31,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:31,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:48:31,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560081656] [2020-12-22 23:48:31,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:31,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:31,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:31,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:48:31,661 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 3 states. [2020-12-22 23:48:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:31,679 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-12-22 23:48:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:31,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-22 23:48:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:31,681 INFO L225 Difference]: With dead ends: 80 [2020-12-22 23:48:31,681 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 23:48:31,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:48:31,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 23:48:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2020-12-22 23:48:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 23:48:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-12-22 23:48:31,687 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 19 [2020-12-22 23:48:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:31,687 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-12-22 23:48:31,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-12-22 23:48:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 23:48:31,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:31,689 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] [2020-12-22 23:48:31,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 23:48:31,689 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:31,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:31,690 INFO L82 PathProgramCache]: Analyzing trace with hash -899171424, now seen corresponding path program 1 times [2020-12-22 23:48:31,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:31,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982405832] [2020-12-22 23:48:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:31,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982405832] [2020-12-22 23:48:31,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:31,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 23:48:31,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188276136] [2020-12-22 23:48:31,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:48:31,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:31,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:48:31,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:31,786 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 5 states. [2020-12-22 23:48:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:31,912 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2020-12-22 23:48:31,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 23:48:31,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-22 23:48:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:31,913 INFO L225 Difference]: With dead ends: 101 [2020-12-22 23:48:31,913 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 23:48:31,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 23:48:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-12-22 23:48:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 23:48:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2020-12-22 23:48:31,920 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 23 [2020-12-22 23:48:31,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:31,920 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2020-12-22 23:48:31,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:48:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2020-12-22 23:48:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 23:48:31,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:31,921 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] [2020-12-22 23:48:31,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 23:48:31,922 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:31,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:31,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1095285435, now seen corresponding path program 1 times [2020-12-22 23:48:31,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:31,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115772044] [2020-12-22 23:48:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:32,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115772044] [2020-12-22 23:48:32,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836848019] [2020-12-22 23:48:32,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 23:48:32,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:32,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:32,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2020-12-22 23:48:32,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176807250] [2020-12-22 23:48:32,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:48:32,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:32,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:48:32,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:48:32,791 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand 17 states. [2020-12-22 23:48:34,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,341 INFO L93 Difference]: Finished difference Result 183 states and 232 transitions. [2020-12-22 23:48:34,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:48:34,342 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2020-12-22 23:48:34,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,343 INFO L225 Difference]: With dead ends: 183 [2020-12-22 23:48:34,343 INFO L226 Difference]: Without dead ends: 147 [2020-12-22 23:48:34,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2020-12-22 23:48:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-22 23:48:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2020-12-22 23:48:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 23:48:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2020-12-22 23:48:34,358 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 23 [2020-12-22 23:48:34,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,358 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2020-12-22 23:48:34,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:48:34,358 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2020-12-22 23:48:34,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 23:48:34,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,360 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] [2020-12-22 23:48:34,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:34,575 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,576 INFO L82 PathProgramCache]: Analyzing trace with hash -859583986, now seen corresponding path program 1 times [2020-12-22 23:48:34,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498716270] [2020-12-22 23:48:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:48:34,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498716270] [2020-12-22 23:48:34,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:34,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 23:48:34,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472413166] [2020-12-22 23:48:34,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:48:34,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:34,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:48:34,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:34,691 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand 5 states. [2020-12-22 23:48:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,771 INFO L93 Difference]: Finished difference Result 140 states and 173 transitions. [2020-12-22 23:48:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 23:48:34,772 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-12-22 23:48:34,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,773 INFO L225 Difference]: With dead ends: 140 [2020-12-22 23:48:34,773 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 23:48:34,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:48:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 23:48:34,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2020-12-22 23:48:34,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 23:48:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2020-12-22 23:48:34,783 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 24 [2020-12-22 23:48:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,783 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2020-12-22 23:48:34,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:48:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2020-12-22 23:48:34,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 23:48:34,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,785 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] [2020-12-22 23:48:34,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 23:48:34,785 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash -474255869, now seen corresponding path program 2 times [2020-12-22 23:48:34,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604452902] [2020-12-22 23:48:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:34,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604452902] [2020-12-22 23:48:34,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512492496] [2020-12-22 23:48:34,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:35,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:35,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 23:48:35,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:35,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:35,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 15 [2020-12-22 23:48:35,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901710089] [2020-12-22 23:48:35,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 23:48:35,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 23:48:35,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:48:35,325 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand 15 states. [2020-12-22 23:48:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:36,477 INFO L93 Difference]: Finished difference Result 311 states and 396 transitions. [2020-12-22 23:48:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 23:48:36,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-12-22 23:48:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:36,481 INFO L225 Difference]: With dead ends: 311 [2020-12-22 23:48:36,481 INFO L226 Difference]: Without dead ends: 268 [2020-12-22 23:48:36,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:48:36,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-12-22 23:48:36,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 103. [2020-12-22 23:48:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 23:48:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2020-12-22 23:48:36,516 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 25 [2020-12-22 23:48:36,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:36,517 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2020-12-22 23:48:36,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 23:48:36,517 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2020-12-22 23:48:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 23:48:36,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:36,520 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] [2020-12-22 23:48:36,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,734 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:36,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:36,735 INFO L82 PathProgramCache]: Analyzing trace with hash -261992112, now seen corresponding path program 1 times [2020-12-22 23:48:36,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:36,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931525869] [2020-12-22 23:48:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:36,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931525869] [2020-12-22 23:48:36,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082497998] [2020-12-22 23:48:36,883 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:48:36,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:37,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:37,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-12-22 23:48:37,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177830749] [2020-12-22 23:48:37,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 23:48:37,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 23:48:37,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:48:37,089 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand 13 states. [2020-12-22 23:48:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:37,419 INFO L93 Difference]: Finished difference Result 148 states and 185 transitions. [2020-12-22 23:48:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:48:37,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-12-22 23:48:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:37,421 INFO L225 Difference]: With dead ends: 148 [2020-12-22 23:48:37,421 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 23:48:37,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:37,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 23:48:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2020-12-22 23:48:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 23:48:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2020-12-22 23:48:37,433 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 26 [2020-12-22 23:48:37,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:37,433 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2020-12-22 23:48:37,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 23:48:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2020-12-22 23:48:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 23:48:37,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:37,435 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] [2020-12-22 23:48:37,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:48:37,649 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:37,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:37,650 INFO L82 PathProgramCache]: Analyzing trace with hash -847962767, now seen corresponding path program 1 times [2020-12-22 23:48:37,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:37,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452849771] [2020-12-22 23:48:37,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:48:37,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452849771] [2020-12-22 23:48:37,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013541247] [2020-12-22 23:48:37,779 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:37,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:48:37,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:48:38,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:38,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2020-12-22 23:48:38,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947363639] [2020-12-22 23:48:38,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 23:48:38,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:38,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 23:48:38,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:48:38,008 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand 10 states. [2020-12-22 23:48:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:38,218 INFO L93 Difference]: Finished difference Result 128 states and 158 transitions. [2020-12-22 23:48:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:48:38,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-12-22 23:48:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:38,219 INFO L225 Difference]: With dead ends: 128 [2020-12-22 23:48:38,219 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 23:48:38,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 23:48:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2020-12-22 23:48:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 23:48:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2020-12-22 23:48:38,228 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 28 [2020-12-22 23:48:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:38,229 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2020-12-22 23:48:38,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 23:48:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2020-12-22 23:48:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 23:48:38,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:38,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:38,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:38,431 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:38,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:38,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1889362156, now seen corresponding path program 1 times [2020-12-22 23:48:38,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:38,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877860704] [2020-12-22 23:48:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:48:38,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877860704] [2020-12-22 23:48:38,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442015571] [2020-12-22 23:48:38,598 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:38,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 23:48:38,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:38,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:38,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-12-22 23:48:38,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163691690] [2020-12-22 23:48:38,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:38,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:38,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:38,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:38,788 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand 14 states. [2020-12-22 23:48:39,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:39,323 INFO L93 Difference]: Finished difference Result 177 states and 225 transitions. [2020-12-22 23:48:39,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 23:48:39,324 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-12-22 23:48:39,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:39,325 INFO L225 Difference]: With dead ends: 177 [2020-12-22 23:48:39,325 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 23:48:39,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:48:39,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 23:48:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 90. [2020-12-22 23:48:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 23:48:39,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-12-22 23:48:39,338 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 28 [2020-12-22 23:48:39,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:39,338 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-12-22 23:48:39,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:39,338 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-12-22 23:48:39,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 23:48:39,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:39,339 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] [2020-12-22 23:48:39,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 23:48:39,554 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:39,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:39,555 INFO L82 PathProgramCache]: Analyzing trace with hash 394878908, now seen corresponding path program 1 times [2020-12-22 23:48:39,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:39,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019676843] [2020-12-22 23:48:39,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 23:48:39,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019676843] [2020-12-22 23:48:39,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494682260] [2020-12-22 23:48:39,620 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:39,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:48:39,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:39,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:39,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 15 [2020-12-22 23:48:39,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024055780] [2020-12-22 23:48:39,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 23:48:39,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:39,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 23:48:39,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:48:39,877 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 15 states. [2020-12-22 23:48:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:40,380 INFO L93 Difference]: Finished difference Result 266 states and 347 transitions. [2020-12-22 23:48:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 23:48:40,381 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-12-22 23:48:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:40,383 INFO L225 Difference]: With dead ends: 266 [2020-12-22 23:48:40,383 INFO L226 Difference]: Without dead ends: 250 [2020-12-22 23:48:40,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:40,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-22 23:48:40,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 112. [2020-12-22 23:48:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 23:48:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 146 transitions. [2020-12-22 23:48:40,401 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 146 transitions. Word has length 30 [2020-12-22 23:48:40,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:40,401 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 146 transitions. [2020-12-22 23:48:40,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 23:48:40,401 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 146 transitions. [2020-12-22 23:48:40,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 23:48:40,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:40,402 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] [2020-12-22 23:48:40,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 23:48:40,616 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:40,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:40,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2125081026, now seen corresponding path program 1 times [2020-12-22 23:48:40,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:40,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140407350] [2020-12-22 23:48:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:48:40,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140407350] [2020-12-22 23:48:40,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958869505] [2020-12-22 23:48:40,965 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 [2020-12-22 23:48:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:41,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 23:48:41,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:41,094 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 11 treesize of output 7 [2020-12-22 23:48:41,094 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:48:41,097 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:48:41,099 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:48:41,100 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:1 [2020-12-22 23:48:41,210 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:48:41,211 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 27 treesize of output 23 [2020-12-22 23:48:41,212 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:48:41,218 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:48:41,220 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:48:41,221 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:27, output treesize:4 [2020-12-22 23:48:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:48:41,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:41,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-12-22 23:48:41,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262912398] [2020-12-22 23:48:41,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:48:41,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:41,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:48:41,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:41,237 INFO L87 Difference]: Start difference. First operand 112 states and 146 transitions. Second operand 18 states. [2020-12-22 23:48:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:41,612 INFO L93 Difference]: Finished difference Result 200 states and 265 transitions. [2020-12-22 23:48:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:48:41,613 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2020-12-22 23:48:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:41,614 INFO L225 Difference]: With dead ends: 200 [2020-12-22 23:48:41,614 INFO L226 Difference]: Without dead ends: 166 [2020-12-22 23:48:41,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-12-22 23:48:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-22 23:48:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-12-22 23:48:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-22 23:48:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2020-12-22 23:48:41,634 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 30 [2020-12-22 23:48:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:41,634 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2020-12-22 23:48:41,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:48:41,634 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2020-12-22 23:48:41,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 23:48:41,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:41,635 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-12-22 23:48:41,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 23:48:41,850 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:41,851 INFO L82 PathProgramCache]: Analyzing trace with hash -550951419, now seen corresponding path program 1 times [2020-12-22 23:48:41,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:41,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221078250] [2020-12-22 23:48:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:48:42,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221078250] [2020-12-22 23:48:42,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167106890] [2020-12-22 23:48:42,148 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:42,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:48:42,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 23:48:42,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:42,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2020-12-22 23:48:42,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600244180] [2020-12-22 23:48:42,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 23:48:42,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:42,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 23:48:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-12-22 23:48:42,379 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand 16 states. [2020-12-22 23:48:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:43,762 INFO L93 Difference]: Finished difference Result 370 states and 472 transitions. [2020-12-22 23:48:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:48:43,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-12-22 23:48:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:43,765 INFO L225 Difference]: With dead ends: 370 [2020-12-22 23:48:43,765 INFO L226 Difference]: Without dead ends: 364 [2020-12-22 23:48:43,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:48:43,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-12-22 23:48:43,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 125. [2020-12-22 23:48:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 23:48:43,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 162 transitions. [2020-12-22 23:48:43,789 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 162 transitions. Word has length 33 [2020-12-22 23:48:43,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:43,790 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 162 transitions. [2020-12-22 23:48:43,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 23:48:43,790 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 162 transitions. [2020-12-22 23:48:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 23:48:43,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:43,791 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-12-22 23:48:44,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 23:48:44,007 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:44,008 INFO L82 PathProgramCache]: Analyzing trace with hash 724367953, now seen corresponding path program 1 times [2020-12-22 23:48:44,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:44,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458863711] [2020-12-22 23:48:44,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 23:48:44,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458863711] [2020-12-22 23:48:44,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542898610] [2020-12-22 23:48:44,195 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:48:44,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:48:44,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:44,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 23:48:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178972272] [2020-12-22 23:48:44,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:44,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:44,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:44,374 INFO L87 Difference]: Start difference. First operand 125 states and 162 transitions. Second operand 14 states. [2020-12-22 23:48:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:44,825 INFO L93 Difference]: Finished difference Result 219 states and 269 transitions. [2020-12-22 23:48:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 23:48:44,826 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-12-22 23:48:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:44,827 INFO L225 Difference]: With dead ends: 219 [2020-12-22 23:48:44,827 INFO L226 Difference]: Without dead ends: 186 [2020-12-22 23:48:44,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:48:44,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-22 23:48:44,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 130. [2020-12-22 23:48:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-22 23:48:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 167 transitions. [2020-12-22 23:48:44,852 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 167 transitions. Word has length 35 [2020-12-22 23:48:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:44,852 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 167 transitions. [2020-12-22 23:48:44,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 167 transitions. [2020-12-22 23:48:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 23:48:44,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:44,853 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-12-22 23:48:45,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 23:48:45,067 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:45,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:45,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1190155876, now seen corresponding path program 2 times [2020-12-22 23:48:45,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:45,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141930819] [2020-12-22 23:48:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 23:48:45,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141930819] [2020-12-22 23:48:45,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024054667] [2020-12-22 23:48:45,161 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:45,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:45,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:45,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:48:45,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:48:45,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:45,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 23:48:45,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289481724] [2020-12-22 23:48:45,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:45,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:45,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:45,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:45,386 INFO L87 Difference]: Start difference. First operand 130 states and 167 transitions. Second operand 14 states. [2020-12-22 23:48:45,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:45,727 INFO L93 Difference]: Finished difference Result 175 states and 221 transitions. [2020-12-22 23:48:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 23:48:45,727 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-12-22 23:48:45,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:45,729 INFO L225 Difference]: With dead ends: 175 [2020-12-22 23:48:45,729 INFO L226 Difference]: Without dead ends: 143 [2020-12-22 23:48:45,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:48:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-22 23:48:45,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 128. [2020-12-22 23:48:45,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-22 23:48:45,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 166 transitions. [2020-12-22 23:48:45,752 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 166 transitions. Word has length 36 [2020-12-22 23:48:45,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:45,752 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 166 transitions. [2020-12-22 23:48:45,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 166 transitions. [2020-12-22 23:48:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 23:48:45,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:45,753 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-12-22 23:48:45,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:45,968 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:45,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:45,969 INFO L82 PathProgramCache]: Analyzing trace with hash 570184438, now seen corresponding path program 1 times [2020-12-22 23:48:45,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:45,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145593962] [2020-12-22 23:48:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:48:46,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145593962] [2020-12-22 23:48:46,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120857951] [2020-12-22 23:48:46,562 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:46,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 23:48:46,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:46,835 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 [2020-12-22 23:48:46,836 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:48:46,841 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:48:46,842 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:48:46,842 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2020-12-22 23:48:47,167 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:48:47,167 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 31 treesize of output 25 [2020-12-22 23:48:47,168 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:48:47,174 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:48:47,176 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:48:47,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:31, output treesize:4 [2020-12-22 23:48:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:47,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:47,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2020-12-22 23:48:47,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343983334] [2020-12-22 23:48:47,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 23:48:47,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:47,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 23:48:47,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:48:47,205 INFO L87 Difference]: Start difference. First operand 128 states and 166 transitions. Second operand 33 states. [2020-12-22 23:48:49,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:49,330 INFO L93 Difference]: Finished difference Result 438 states and 558 transitions. [2020-12-22 23:48:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 23:48:49,330 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-12-22 23:48:49,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:49,332 INFO L225 Difference]: With dead ends: 438 [2020-12-22 23:48:49,332 INFO L226 Difference]: Without dead ends: 376 [2020-12-22 23:48:49,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=418, Invalid=2662, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 23:48:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-12-22 23:48:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 138. [2020-12-22 23:48:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-22 23:48:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 177 transitions. [2020-12-22 23:48:49,358 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 177 transitions. Word has length 36 [2020-12-22 23:48:49,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:49,358 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 177 transitions. [2020-12-22 23:48:49,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 23:48:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 177 transitions. [2020-12-22 23:48:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 23:48:49,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:49,359 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:49,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-12-22 23:48:49,573 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:49,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:49,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1057400740, now seen corresponding path program 1 times [2020-12-22 23:48:49,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:49,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121680850] [2020-12-22 23:48:49,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:48:49,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121680850] [2020-12-22 23:48:49,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33240420] [2020-12-22 23:48:49,758 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 23:48:49,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:49,925 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 23:48:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:48:50,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:50,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2020-12-22 23:48:50,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634073201] [2020-12-22 23:48:50,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:48:50,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:50,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:48:50,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:50,012 INFO L87 Difference]: Start difference. First operand 138 states and 177 transitions. Second operand 18 states. [2020-12-22 23:48:51,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:51,444 INFO L93 Difference]: Finished difference Result 428 states and 538 transitions. [2020-12-22 23:48:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 23:48:51,444 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-12-22 23:48:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:51,445 INFO L225 Difference]: With dead ends: 428 [2020-12-22 23:48:51,446 INFO L226 Difference]: Without dead ends: 347 [2020-12-22 23:48:51,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=409, Invalid=1483, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:48:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-12-22 23:48:51,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 126. [2020-12-22 23:48:51,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 23:48:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 161 transitions. [2020-12-22 23:48:51,470 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 161 transitions. Word has length 38 [2020-12-22 23:48:51,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:51,470 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 161 transitions. [2020-12-22 23:48:51,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:48:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 161 transitions. [2020-12-22 23:48:51,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 23:48:51,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:51,471 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-12-22 23:48:51,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:51,687 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:51,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:51,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1016288708, now seen corresponding path program 1 times [2020-12-22 23:48:51,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:51,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254654070] [2020-12-22 23:48:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 23:48:52,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254654070] [2020-12-22 23:48:52,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605402502] [2020-12-22 23:48:52,126 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 [2020-12-22 23:48:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:52,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:48:52,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 23:48:52,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:48:52,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2020-12-22 23:48:52,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237397609] [2020-12-22 23:48:52,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:48:52,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:52,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:48:52,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:52,274 INFO L87 Difference]: Start difference. First operand 126 states and 161 transitions. Second operand 4 states. [2020-12-22 23:48:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:52,370 INFO L93 Difference]: Finished difference Result 169 states and 214 transitions. [2020-12-22 23:48:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:52,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-12-22 23:48:52,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:52,372 INFO L225 Difference]: With dead ends: 169 [2020-12-22 23:48:52,372 INFO L226 Difference]: Without dead ends: 164 [2020-12-22 23:48:52,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:48:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-22 23:48:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 136. [2020-12-22 23:48:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 23:48:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 174 transitions. [2020-12-22 23:48:52,396 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 174 transitions. Word has length 38 [2020-12-22 23:48:52,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:52,396 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 174 transitions. [2020-12-22 23:48:52,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:48:52,397 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 174 transitions. [2020-12-22 23:48:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 23:48:52,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:52,397 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-12-22 23:48:52,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 23:48:52,600 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:52,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1409375300, now seen corresponding path program 1 times [2020-12-22 23:48:52,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:52,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011483270] [2020-12-22 23:48:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 23:48:52,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011483270] [2020-12-22 23:48:52,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790489943] [2020-12-22 23:48:52,767 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:52,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 23:48:52,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:52,879 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 [2020-12-22 23:48:52,880 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:48:52,881 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:48:52,882 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:48:52,883 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:1 [2020-12-22 23:48:53,094 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:53,096 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:48:53,108 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-22 23:48:53,109 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:48:53,134 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:48:53,134 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 71 [2020-12-22 23:48:53,137 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:53,142 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 23:48:53,165 INFO L625 ElimStorePlain]: treesize reduction 34, result has 46.0 percent of original size [2020-12-22 23:48:53,168 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:48:53,168 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:112, output treesize:8 [2020-12-22 23:48:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:53,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:53,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2020-12-22 23:48:53,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875884342] [2020-12-22 23:48:53,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 23:48:53,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:53,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 23:48:53,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:48:53,207 INFO L87 Difference]: Start difference. First operand 136 states and 174 transitions. Second operand 19 states. [2020-12-22 23:48:54,278 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 23:48:55,304 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-12-22 23:48:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:56,400 INFO L93 Difference]: Finished difference Result 688 states and 894 transitions. [2020-12-22 23:48:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 23:48:56,401 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-12-22 23:48:56,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:56,404 INFO L225 Difference]: With dead ends: 688 [2020-12-22 23:48:56,404 INFO L226 Difference]: Without dead ends: 548 [2020-12-22 23:48:56,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=446, Invalid=2104, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 23:48:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-12-22 23:48:56,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 242. [2020-12-22 23:48:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-22 23:48:56,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 314 transitions. [2020-12-22 23:48:56,451 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 314 transitions. Word has length 38 [2020-12-22 23:48:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:56,451 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 314 transitions. [2020-12-22 23:48:56,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 23:48:56,452 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 314 transitions. [2020-12-22 23:48:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 23:48:56,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:56,452 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1] [2020-12-22 23:48:56,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:56,653 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:56,654 INFO L82 PathProgramCache]: Analyzing trace with hash -220653639, now seen corresponding path program 1 times [2020-12-22 23:48:56,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:56,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444423598] [2020-12-22 23:48:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 23:48:56,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444423598] [2020-12-22 23:48:56,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821275070] [2020-12-22 23:48:56,898 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:56,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 23:48:56,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:48:57,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:57,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2020-12-22 23:48:57,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025916916] [2020-12-22 23:48:57,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 23:48:57,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:57,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 23:48:57,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:48:57,232 INFO L87 Difference]: Start difference. First operand 242 states and 314 transitions. Second operand 19 states. [2020-12-22 23:48:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:58,873 INFO L93 Difference]: Finished difference Result 600 states and 767 transitions. [2020-12-22 23:48:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 23:48:58,874 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-12-22 23:48:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:58,876 INFO L225 Difference]: With dead ends: 600 [2020-12-22 23:48:58,876 INFO L226 Difference]: Without dead ends: 422 [2020-12-22 23:48:58,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 23:48:58,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-12-22 23:48:58,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 218. [2020-12-22 23:48:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-22 23:48:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 278 transitions. [2020-12-22 23:48:58,931 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 278 transitions. Word has length 39 [2020-12-22 23:48:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:58,931 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 278 transitions. [2020-12-22 23:48:58,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 23:48:58,931 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 278 transitions. [2020-12-22 23:48:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 23:48:58,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:58,932 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-12-22 23:48:59,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 23:48:59,147 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:59,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:59,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1715439214, now seen corresponding path program 1 times [2020-12-22 23:48:59,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:59,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695286805] [2020-12-22 23:48:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 23:48:59,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695286805] [2020-12-22 23:48:59,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612292405] [2020-12-22 23:48:59,335 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 [2020-12-22 23:48:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:59,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:48:59,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 23:48:59,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:59,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-12-22 23:48:59,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790185329] [2020-12-22 23:48:59,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:48:59,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:59,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:48:59,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:48:59,506 INFO L87 Difference]: Start difference. First operand 218 states and 278 transitions. Second operand 9 states. [2020-12-22 23:48:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:59,706 INFO L93 Difference]: Finished difference Result 246 states and 311 transitions. [2020-12-22 23:48:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 23:48:59,707 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-12-22 23:48:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:59,710 INFO L225 Difference]: With dead ends: 246 [2020-12-22 23:48:59,710 INFO L226 Difference]: Without dead ends: 233 [2020-12-22 23:48:59,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:48:59,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-22 23:48:59,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 223. [2020-12-22 23:48:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-22 23:48:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 284 transitions. [2020-12-22 23:48:59,745 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 284 transitions. Word has length 40 [2020-12-22 23:48:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:59,745 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 284 transitions. [2020-12-22 23:48:59,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:48:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 284 transitions. [2020-12-22 23:48:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 23:48:59,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:59,746 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-12-22 23:48:59,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 23:48:59,960 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:59,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1854698595, now seen corresponding path program 1 times [2020-12-22 23:48:59,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:59,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174675935] [2020-12-22 23:48:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 23:49:00,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174675935] [2020-12-22 23:49:00,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896642499] [2020-12-22 23:49:00,440 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:00,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 23:49:00,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:00,550 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 [2020-12-22 23:49:00,550 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:00,552 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:00,553 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:00,553 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:1 [2020-12-22 23:49:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:49:00,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:00,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-12-22 23:49:00,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540053851] [2020-12-22 23:49:00,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:49:00,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:00,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:49:00,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:49:00,705 INFO L87 Difference]: Start difference. First operand 223 states and 284 transitions. Second operand 21 states. [2020-12-22 23:49:01,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:01,283 INFO L93 Difference]: Finished difference Result 339 states and 426 transitions. [2020-12-22 23:49:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 23:49:01,283 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-12-22 23:49:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:01,285 INFO L225 Difference]: With dead ends: 339 [2020-12-22 23:49:01,285 INFO L226 Difference]: Without dead ends: 322 [2020-12-22 23:49:01,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:49:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-12-22 23:49:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 234. [2020-12-22 23:49:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-22 23:49:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 295 transitions. [2020-12-22 23:49:01,337 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 295 transitions. Word has length 41 [2020-12-22 23:49:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:01,337 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 295 transitions. [2020-12-22 23:49:01,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:49:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 295 transitions. [2020-12-22 23:49:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 23:49:01,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:01,338 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:01,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 23:49:01,553 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:01,554 INFO L82 PathProgramCache]: Analyzing trace with hash -753377904, now seen corresponding path program 1 times [2020-12-22 23:49:01,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:01,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517352661] [2020-12-22 23:49:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:49:01,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517352661] [2020-12-22 23:49:01,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451086801] [2020-12-22 23:49:01,998 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:02,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 23:49:02,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:02,103 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 [2020-12-22 23:49:02,104 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:02,106 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:02,107 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:02,107 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:1 [2020-12-22 23:49:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:49:02,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:02,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2020-12-22 23:49:02,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620914217] [2020-12-22 23:49:02,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 23:49:02,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:02,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 23:49:02,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:49:02,369 INFO L87 Difference]: Start difference. First operand 234 states and 295 transitions. Second operand 26 states. [2020-12-22 23:49:03,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:03,436 INFO L93 Difference]: Finished difference Result 421 states and 536 transitions. [2020-12-22 23:49:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 23:49:03,437 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2020-12-22 23:49:03,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:03,439 INFO L225 Difference]: With dead ends: 421 [2020-12-22 23:49:03,439 INFO L226 Difference]: Without dead ends: 343 [2020-12-22 23:49:03,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 23:49:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-12-22 23:49:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 243. [2020-12-22 23:49:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-22 23:49:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 306 transitions. [2020-12-22 23:49:03,492 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 306 transitions. Word has length 42 [2020-12-22 23:49:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:03,493 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 306 transitions. [2020-12-22 23:49:03,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 23:49:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 306 transitions. [2020-12-22 23:49:03,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 23:49:03,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:03,494 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:03,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 23:49:03,709 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:03,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:03,710 INFO L82 PathProgramCache]: Analyzing trace with hash 2111315197, now seen corresponding path program 3 times [2020-12-22 23:49:03,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:03,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080362705] [2020-12-22 23:49:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 23:49:03,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080362705] [2020-12-22 23:49:03,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608442152] [2020-12-22 23:49:03,820 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:03,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:49:03,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:03,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 23:49:03,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-22 23:49:04,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:04,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 23:49:04,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117885765] [2020-12-22 23:49:04,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 23:49:04,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:04,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 23:49:04,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-12-22 23:49:04,124 INFO L87 Difference]: Start difference. First operand 243 states and 306 transitions. Second operand 16 states. [2020-12-22 23:49:05,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:05,175 INFO L93 Difference]: Finished difference Result 322 states and 406 transitions. [2020-12-22 23:49:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 23:49:05,175 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-12-22 23:49:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:05,177 INFO L225 Difference]: With dead ends: 322 [2020-12-22 23:49:05,177 INFO L226 Difference]: Without dead ends: 292 [2020-12-22 23:49:05,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:49:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-22 23:49:05,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2020-12-22 23:49:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-12-22 23:49:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 315 transitions. [2020-12-22 23:49:05,225 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 315 transitions. Word has length 43 [2020-12-22 23:49:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:05,225 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 315 transitions. [2020-12-22 23:49:05,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 23:49:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 315 transitions. [2020-12-22 23:49:05,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 23:49:05,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:05,226 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:05,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 23:49:05,426 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:05,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:05,427 INFO L82 PathProgramCache]: Analyzing trace with hash -24475275, now seen corresponding path program 2 times [2020-12-22 23:49:05,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:05,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908311496] [2020-12-22 23:49:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 23:49:05,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908311496] [2020-12-22 23:49:05,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648197849] [2020-12-22 23:49:05,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:05,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:05,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:05,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:49:05,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 23:49:05,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:05,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2020-12-22 23:49:05,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422804986] [2020-12-22 23:49:05,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:49:05,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:05,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:49:05,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:49:05,912 INFO L87 Difference]: Start difference. First operand 251 states and 315 transitions. Second operand 17 states. [2020-12-22 23:49:06,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:06,877 INFO L93 Difference]: Finished difference Result 596 states and 743 transitions. [2020-12-22 23:49:06,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 23:49:06,877 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-12-22 23:49:06,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:06,879 INFO L225 Difference]: With dead ends: 596 [2020-12-22 23:49:06,879 INFO L226 Difference]: Without dead ends: 590 [2020-12-22 23:49:06,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:49:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-12-22 23:49:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 257. [2020-12-22 23:49:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-22 23:49:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 324 transitions. [2020-12-22 23:49:06,933 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 324 transitions. Word has length 43 [2020-12-22 23:49:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:06,933 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 324 transitions. [2020-12-22 23:49:06,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:49:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 324 transitions. [2020-12-22 23:49:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 23:49:06,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:06,935 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1] [2020-12-22 23:49:07,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:07,143 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:07,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1749753544, now seen corresponding path program 2 times [2020-12-22 23:49:07,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:07,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298432474] [2020-12-22 23:49:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 23:49:07,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298432474] [2020-12-22 23:49:07,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091221449] [2020-12-22 23:49:07,357 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:07,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:07,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:49:07,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 23:49:07,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:07,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2020-12-22 23:49:07,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389992068] [2020-12-22 23:49:07,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 23:49:07,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:07,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 23:49:07,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:49:07,595 INFO L87 Difference]: Start difference. First operand 257 states and 324 transitions. Second operand 13 states. [2020-12-22 23:49:08,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:08,052 INFO L93 Difference]: Finished difference Result 317 states and 391 transitions. [2020-12-22 23:49:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:49:08,053 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-12-22 23:49:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:08,054 INFO L225 Difference]: With dead ends: 317 [2020-12-22 23:49:08,054 INFO L226 Difference]: Without dead ends: 256 [2020-12-22 23:49:08,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:49:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-22 23:49:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 250. [2020-12-22 23:49:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-22 23:49:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 314 transitions. [2020-12-22 23:49:08,114 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 314 transitions. Word has length 45 [2020-12-22 23:49:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:08,114 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 314 transitions. [2020-12-22 23:49:08,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 23:49:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 314 transitions. [2020-12-22 23:49:08,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 23:49:08,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:08,116 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:08,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:08,330 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:08,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:08,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1646709125, now seen corresponding path program 2 times [2020-12-22 23:49:08,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:08,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016834222] [2020-12-22 23:49:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 23:49:08,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016834222] [2020-12-22 23:49:08,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57582422] [2020-12-22 23:49:08,552 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:08,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:08,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:08,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 23:49:08,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 23:49:09,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:09,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2020-12-22 23:49:09,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66604763] [2020-12-22 23:49:09,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 23:49:09,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:09,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 23:49:09,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:49:09,006 INFO L87 Difference]: Start difference. First operand 250 states and 314 transitions. Second operand 20 states. [2020-12-22 23:49:11,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:11,214 INFO L93 Difference]: Finished difference Result 989 states and 1236 transitions. [2020-12-22 23:49:11,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 23:49:11,214 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-12-22 23:49:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:11,218 INFO L225 Difference]: With dead ends: 989 [2020-12-22 23:49:11,218 INFO L226 Difference]: Without dead ends: 872 [2020-12-22 23:49:11,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 23:49:11,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2020-12-22 23:49:11,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 326. [2020-12-22 23:49:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-12-22 23:49:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 414 transitions. [2020-12-22 23:49:11,306 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 414 transitions. Word has length 45 [2020-12-22 23:49:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:11,306 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 414 transitions. [2020-12-22 23:49:11,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 23:49:11,306 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 414 transitions. [2020-12-22 23:49:11,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 23:49:11,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:11,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:11,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:11,521 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:11,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:11,522 INFO L82 PathProgramCache]: Analyzing trace with hash -399574650, now seen corresponding path program 3 times [2020-12-22 23:49:11,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:11,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106123019] [2020-12-22 23:49:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 23:49:12,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106123019] [2020-12-22 23:49:12,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167426309] [2020-12-22 23:49:12,327 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:13,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:49:13,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:13,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 23:49:13,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:13,460 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2020-12-22 23:49:13,461 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:13,464 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:13,465 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:13,467 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:7 [2020-12-22 23:49:13,493 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 [2020-12-22 23:49:13,494 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:13,510 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:13,512 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:13,512 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-12-22 23:49:13,721 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:13,722 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 26 treesize of output 18 [2020-12-22 23:49:13,723 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:13,725 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:13,725 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:13,726 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2020-12-22 23:49:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 23:49:13,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:13,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 24 [2020-12-22 23:49:13,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673100668] [2020-12-22 23:49:13,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 23:49:13,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:13,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 23:49:13,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:49:13,760 INFO L87 Difference]: Start difference. First operand 326 states and 414 transitions. Second operand 24 states. [2020-12-22 23:49:15,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:15,506 INFO L93 Difference]: Finished difference Result 738 states and 946 transitions. [2020-12-22 23:49:15,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:49:15,506 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-22 23:49:15,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:15,509 INFO L225 Difference]: With dead ends: 738 [2020-12-22 23:49:15,509 INFO L226 Difference]: Without dead ends: 609 [2020-12-22 23:49:15,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 23:49:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2020-12-22 23:49:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 334. [2020-12-22 23:49:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-12-22 23:49:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 420 transitions. [2020-12-22 23:49:15,592 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 420 transitions. Word has length 46 [2020-12-22 23:49:15,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:15,592 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 420 transitions. [2020-12-22 23:49:15,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 23:49:15,592 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 420 transitions. [2020-12-22 23:49:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 23:49:15,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:15,594 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:15,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 23:49:15,798 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:15,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:15,798 INFO L82 PathProgramCache]: Analyzing trace with hash -593353654, now seen corresponding path program 4 times [2020-12-22 23:49:15,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:15,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960940410] [2020-12-22 23:49:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 23:49:16,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960940410] [2020-12-22 23:49:16,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337802197] [2020-12-22 23:49:16,575 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:16,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:49:16,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:16,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 23:49:16,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:16,734 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 [2020-12-22 23:49:16,735 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:16,737 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:16,743 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:16,744 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:1 [2020-12-22 23:49:17,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:17,165 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:49:17,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-22 23:49:17,181 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:17,210 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:17,211 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 71 [2020-12-22 23:49:17,214 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:17,218 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:17,249 INFO L625 ElimStorePlain]: treesize reduction 36, result has 44.6 percent of original size [2020-12-22 23:49:17,252 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:17,252 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:112, output treesize:8 [2020-12-22 23:49:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:49:17,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:17,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2020-12-22 23:49:17,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954266894] [2020-12-22 23:49:17,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 23:49:17,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:17,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 23:49:17,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 23:49:17,295 INFO L87 Difference]: Start difference. First operand 334 states and 420 transitions. Second operand 34 states. [2020-12-22 23:49:18,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:18,928 INFO L93 Difference]: Finished difference Result 565 states and 711 transitions. [2020-12-22 23:49:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 23:49:18,929 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 46 [2020-12-22 23:49:18,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:18,931 INFO L225 Difference]: With dead ends: 565 [2020-12-22 23:49:18,931 INFO L226 Difference]: Without dead ends: 522 [2020-12-22 23:49:18,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 23:49:18,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-12-22 23:49:19,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 346. [2020-12-22 23:49:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-12-22 23:49:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 432 transitions. [2020-12-22 23:49:19,004 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 432 transitions. Word has length 46 [2020-12-22 23:49:19,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:19,005 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 432 transitions. [2020-12-22 23:49:19,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 23:49:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 432 transitions. [2020-12-22 23:49:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 23:49:19,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:19,006 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:19,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:19,222 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:19,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:19,223 INFO L82 PathProgramCache]: Analyzing trace with hash -902930382, now seen corresponding path program 5 times [2020-12-22 23:49:19,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:19,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635221694] [2020-12-22 23:49:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 23:49:20,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635221694] [2020-12-22 23:49:20,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963792446] [2020-12-22 23:49:20,011 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:20,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 23:49:20,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:20,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 23:49:20,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:20,938 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 [2020-12-22 23:49:20,939 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:20,940 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:20,941 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:20,941 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:1 [2020-12-22 23:49:21,363 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:21,365 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:49:21,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-22 23:49:21,377 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:21,402 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:21,402 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 71 [2020-12-22 23:49:21,405 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:21,407 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:21,438 INFO L625 ElimStorePlain]: treesize reduction 36, result has 44.6 percent of original size [2020-12-22 23:49:21,441 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:21,441 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:112, output treesize:8 [2020-12-22 23:49:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:49:21,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:21,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2020-12-22 23:49:21,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913639313] [2020-12-22 23:49:21,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 23:49:21,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:21,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 23:49:21,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 23:49:21,484 INFO L87 Difference]: Start difference. First operand 346 states and 432 transitions. Second operand 34 states. [2020-12-22 23:49:23,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:23,183 INFO L93 Difference]: Finished difference Result 597 states and 753 transitions. [2020-12-22 23:49:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 23:49:23,183 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 46 [2020-12-22 23:49:23,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:23,185 INFO L225 Difference]: With dead ends: 597 [2020-12-22 23:49:23,186 INFO L226 Difference]: Without dead ends: 554 [2020-12-22 23:49:23,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:49:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-12-22 23:49:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 370. [2020-12-22 23:49:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-12-22 23:49:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 462 transitions. [2020-12-22 23:49:23,259 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 462 transitions. Word has length 46 [2020-12-22 23:49:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:23,260 INFO L481 AbstractCegarLoop]: Abstraction has 370 states and 462 transitions. [2020-12-22 23:49:23,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 23:49:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 462 transitions. [2020-12-22 23:49:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 23:49:23,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:23,261 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1] [2020-12-22 23:49:23,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 23:49:23,465 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:23,466 INFO L82 PathProgramCache]: Analyzing trace with hash 846907254, now seen corresponding path program 3 times [2020-12-22 23:49:23,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:23,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599730119] [2020-12-22 23:49:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 23:49:23,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599730119] [2020-12-22 23:49:23,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911307155] [2020-12-22 23:49:23,671 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:23,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 23:49:23,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:23,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 23:49:23,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 23:49:24,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:24,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-12-22 23:49:24,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689388717] [2020-12-22 23:49:24,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:49:24,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:24,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:49:24,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:49:24,335 INFO L87 Difference]: Start difference. First operand 370 states and 462 transitions. Second operand 18 states. [2020-12-22 23:49:26,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:26,263 INFO L93 Difference]: Finished difference Result 524 states and 645 transitions. [2020-12-22 23:49:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 23:49:26,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-12-22 23:49:26,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:26,265 INFO L225 Difference]: With dead ends: 524 [2020-12-22 23:49:26,266 INFO L226 Difference]: Without dead ends: 473 [2020-12-22 23:49:26,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:49:26,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-12-22 23:49:26,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 384. [2020-12-22 23:49:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-12-22 23:49:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 477 transitions. [2020-12-22 23:49:26,373 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 477 transitions. Word has length 47 [2020-12-22 23:49:26,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:26,374 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 477 transitions. [2020-12-22 23:49:26,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:49:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 477 transitions. [2020-12-22 23:49:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 23:49:26,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:26,375 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:26,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:26,590 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:26,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:26,591 INFO L82 PathProgramCache]: Analyzing trace with hash 294966981, now seen corresponding path program 1 times [2020-12-22 23:49:26,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:26,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737489451] [2020-12-22 23:49:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 23:49:26,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737489451] [2020-12-22 23:49:26,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893120970] [2020-12-22 23:49:26,753 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:26,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 23:49:26,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 23:49:27,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:27,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2020-12-22 23:49:27,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672802678] [2020-12-22 23:49:27,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 23:49:27,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:27,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 23:49:27,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:49:27,053 INFO L87 Difference]: Start difference. First operand 384 states and 477 transitions. Second operand 19 states. [2020-12-22 23:49:27,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:27,903 INFO L93 Difference]: Finished difference Result 494 states and 608 transitions. [2020-12-22 23:49:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 23:49:27,904 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-12-22 23:49:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:27,905 INFO L225 Difference]: With dead ends: 494 [2020-12-22 23:49:27,905 INFO L226 Difference]: Without dead ends: 388 [2020-12-22 23:49:27,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:49:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-12-22 23:49:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 368. [2020-12-22 23:49:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-12-22 23:49:28,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 460 transitions. [2020-12-22 23:49:28,023 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 460 transitions. Word has length 47 [2020-12-22 23:49:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:28,023 INFO L481 AbstractCegarLoop]: Abstraction has 368 states and 460 transitions. [2020-12-22 23:49:28,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 23:49:28,024 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 460 transitions. [2020-12-22 23:49:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 23:49:28,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:28,025 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:28,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 23:49:28,239 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:28,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:28,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1492854075, now seen corresponding path program 6 times [2020-12-22 23:49:28,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:28,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238782707] [2020-12-22 23:49:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 23:49:28,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238782707] [2020-12-22 23:49:28,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236265813] [2020-12-22 23:49:28,888 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:29,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 23:49:29,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:29,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 23:49:29,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:29,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:29,503 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:49:29,514 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 23:49:29,517 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 23:49:29,522 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:29,523 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 18 [2020-12-22 23:49:29,524 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:29,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-22 23:49:29,528 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:29,537 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-12-22 23:49:29,538 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:29,538 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:7 [2020-12-22 23:49:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 23:49:29,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:29,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2020-12-22 23:49:29,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48902735] [2020-12-22 23:49:29,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 23:49:29,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:29,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 23:49:29,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:49:29,596 INFO L87 Difference]: Start difference. First operand 368 states and 460 transitions. Second operand 26 states. [2020-12-22 23:49:30,428 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-12-22 23:49:31,572 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-22 23:49:32,166 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-12-22 23:49:32,475 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-12-22 23:49:33,026 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-12-22 23:49:33,368 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-12-22 23:49:33,543 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-12-22 23:49:33,958 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-22 23:49:34,257 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-12-22 23:49:35,421 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-12-22 23:49:35,628 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-22 23:49:36,138 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-12-22 23:49:36,396 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2020-12-22 23:49:36,782 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-12-22 23:49:37,059 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-12-22 23:49:37,559 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-12-22 23:49:37,800 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-12-22 23:49:38,186 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-12-22 23:49:38,370 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-22 23:49:38,585 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-12-22 23:49:38,855 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-22 23:49:39,147 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-12-22 23:49:39,474 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-12-22 23:49:39,887 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 23:49:40,188 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-12-22 23:49:40,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:40,472 INFO L93 Difference]: Finished difference Result 918 states and 1136 transitions. [2020-12-22 23:49:40,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 23:49:40,473 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2020-12-22 23:49:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:40,476 INFO L225 Difference]: With dead ends: 918 [2020-12-22 23:49:40,476 INFO L226 Difference]: Without dead ends: 745 [2020-12-22 23:49:40,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=854, Invalid=5466, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 23:49:40,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2020-12-22 23:49:40,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 309. [2020-12-22 23:49:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-12-22 23:49:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 384 transitions. [2020-12-22 23:49:40,543 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 384 transitions. Word has length 49 [2020-12-22 23:49:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:40,544 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 384 transitions. [2020-12-22 23:49:40,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 23:49:40,544 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 384 transitions. [2020-12-22 23:49:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 23:49:40,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:40,545 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:40,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:40,752 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:40,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:40,753 INFO L82 PathProgramCache]: Analyzing trace with hash -670831401, now seen corresponding path program 1 times [2020-12-22 23:49:40,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:40,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412671703] [2020-12-22 23:49:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 23:49:42,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412671703] [2020-12-22 23:49:42,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354353835] [2020-12-22 23:49:42,037 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:42,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 23:49:42,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 23:49:42,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:42,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 28 [2020-12-22 23:49:42,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863642974] [2020-12-22 23:49:42,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 23:49:42,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:42,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 23:49:42,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:49:42,628 INFO L87 Difference]: Start difference. First operand 309 states and 384 transitions. Second operand 28 states. [2020-12-22 23:49:44,004 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2020-12-22 23:49:44,881 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2020-12-22 23:49:47,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:47,355 INFO L93 Difference]: Finished difference Result 761 states and 930 transitions. [2020-12-22 23:49:47,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 23:49:47,356 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2020-12-22 23:49:47,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:47,359 INFO L225 Difference]: With dead ends: 761 [2020-12-22 23:49:47,359 INFO L226 Difference]: Without dead ends: 657 [2020-12-22 23:49:47,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=321, Invalid=2649, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 23:49:47,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-12-22 23:49:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 315. [2020-12-22 23:49:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-12-22 23:49:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 388 transitions. [2020-12-22 23:49:47,442 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 388 transitions. Word has length 50 [2020-12-22 23:49:47,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:47,442 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 388 transitions. [2020-12-22 23:49:47,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 23:49:47,442 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 388 transitions. [2020-12-22 23:49:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 23:49:47,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:47,443 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:47,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 23:49:47,659 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash 844627334, now seen corresponding path program 3 times [2020-12-22 23:49:47,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:47,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457804413] [2020-12-22 23:49:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:48,413 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2020-12-22 23:49:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 23:49:48,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457804413] [2020-12-22 23:49:48,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530900665] [2020-12-22 23:49:48,517 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:48,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 23:49:48,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:48,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-22 23:49:48,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:48,962 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 [2020-12-22 23:49:48,964 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:48,972 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:48,974 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:48,974 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2020-12-22 23:49:49,674 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:49,674 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 27 treesize of output 19 [2020-12-22 23:49:49,676 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:49,681 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:49,683 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:49,684 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:4 [2020-12-22 23:49:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 23:49:49,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:49,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2020-12-22 23:49:49,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541855260] [2020-12-22 23:49:49,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 23:49:49,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:49,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 23:49:49,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:49:49,737 INFO L87 Difference]: Start difference. First operand 315 states and 388 transitions. Second operand 31 states. [2020-12-22 23:49:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:52,162 INFO L93 Difference]: Finished difference Result 490 states and 616 transitions. [2020-12-22 23:49:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 23:49:52,163 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 50 [2020-12-22 23:49:52,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:52,164 INFO L225 Difference]: With dead ends: 490 [2020-12-22 23:49:52,164 INFO L226 Difference]: Without dead ends: 438 [2020-12-22 23:49:52,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 23:49:52,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-12-22 23:49:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 339. [2020-12-22 23:49:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-12-22 23:49:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 417 transitions. [2020-12-22 23:49:52,273 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 417 transitions. Word has length 50 [2020-12-22 23:49:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:52,274 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 417 transitions. [2020-12-22 23:49:52,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 23:49:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 417 transitions. [2020-12-22 23:49:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 23:49:52,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:52,275 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:52,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 23:49:52,489 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:52,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:52,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2103976513, now seen corresponding path program 7 times [2020-12-22 23:49:52,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:52,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616291218] [2020-12-22 23:49:52,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 23:49:52,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616291218] [2020-12-22 23:49:52,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341813284] [2020-12-22 23:49:52,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:53,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 23:49:53,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:49:53,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:53,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 21 [2020-12-22 23:49:53,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992567216] [2020-12-22 23:49:53,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:49:53,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:53,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:49:53,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:49:53,590 INFO L87 Difference]: Start difference. First operand 339 states and 417 transitions. Second operand 21 states. [2020-12-22 23:49:56,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:56,175 INFO L93 Difference]: Finished difference Result 874 states and 1074 transitions. [2020-12-22 23:49:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 23:49:56,177 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-12-22 23:49:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:56,180 INFO L225 Difference]: With dead ends: 874 [2020-12-22 23:49:56,181 INFO L226 Difference]: Without dead ends: 868 [2020-12-22 23:49:56,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:49:56,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2020-12-22 23:49:56,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 345. [2020-12-22 23:49:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-12-22 23:49:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 426 transitions. [2020-12-22 23:49:56,306 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 426 transitions. Word has length 51 [2020-12-22 23:49:56,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:56,307 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 426 transitions. [2020-12-22 23:49:56,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:49:56,307 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 426 transitions. [2020-12-22 23:49:56,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 23:49:56,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:56,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:56,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 23:49:56,516 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:56,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:56,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1394545198, now seen corresponding path program 2 times [2020-12-22 23:49:56,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:56,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721507393] [2020-12-22 23:49:56,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 23:49:57,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721507393] [2020-12-22 23:49:57,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856862018] [2020-12-22 23:49:57,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:57,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:57,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:57,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 23:49:57,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:57,470 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 [2020-12-22 23:49:57,471 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:57,473 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:57,474 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:57,474 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:1 [2020-12-22 23:49:57,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:57,784 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 23:49:57,786 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 23:49:57,787 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 23:49:57,790 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 23:49:57,805 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:57,805 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 24 [2020-12-22 23:49:57,807 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:57,875 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:49:57,876 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 108 [2020-12-22 23:49:57,881 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 1] term [2020-12-22 23:49:57,881 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 23:49:57,882 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 3, 1] term [2020-12-22 23:49:57,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:49:57,882 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2020-12-22 23:49:57,883 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 23:49:57,887 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:57,887 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:49:57,888 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 23:49:57,891 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 23:49:57,893 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 23:49:57,896 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 23:49:57,915 INFO L625 ElimStorePlain]: treesize reduction 72, result has 8.9 percent of original size [2020-12-22 23:49:57,916 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:49:57,916 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:84, output treesize:7 [2020-12-22 23:49:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 23:49:57,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:57,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-12-22 23:49:57,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090178922] [2020-12-22 23:49:57,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 23:49:57,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:57,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 23:49:57,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:49:57,961 INFO L87 Difference]: Start difference. First operand 345 states and 426 transitions. Second operand 28 states. [2020-12-22 23:49:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:59,377 INFO L93 Difference]: Finished difference Result 498 states and 617 transitions. [2020-12-22 23:49:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 23:49:59,378 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 53 [2020-12-22 23:49:59,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:59,380 INFO L225 Difference]: With dead ends: 498 [2020-12-22 23:49:59,381 INFO L226 Difference]: Without dead ends: 476 [2020-12-22 23:49:59,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:49:59,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-12-22 23:49:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 363. [2020-12-22 23:49:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-12-22 23:49:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 446 transitions. [2020-12-22 23:49:59,477 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 446 transitions. Word has length 53 [2020-12-22 23:49:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:59,478 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 446 transitions. [2020-12-22 23:49:59,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 23:49:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 446 transitions. [2020-12-22 23:49:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 23:49:59,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:59,479 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:59,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 23:49:59,684 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:59,684 INFO L82 PathProgramCache]: Analyzing trace with hash 791033853, now seen corresponding path program 4 times [2020-12-22 23:49:59,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:59,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170435265] [2020-12-22 23:49:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:03,243 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 23:50:03,838 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 23:50:07,426 WARN L197 SmtUtils]: Spent 3.25 s on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 23:50:08,135 WARN L197 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-12-22 23:50:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:50:09,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170435265] [2020-12-22 23:50:09,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021475062] [2020-12-22 23:50:09,689 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:09,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:50:09,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:09,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 23:50:09,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:50:11,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:11,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 41 [2020-12-22 23:50:11,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847597309] [2020-12-22 23:50:11,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 23:50:11,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:11,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 23:50:11,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1505, Unknown=1, NotChecked=0, Total=1640 [2020-12-22 23:50:11,075 INFO L87 Difference]: Start difference. First operand 363 states and 446 transitions. Second operand 41 states. [2020-12-22 23:50:13,493 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2020-12-22 23:50:17,227 WARN L197 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-12-22 23:50:18,909 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2020-12-22 23:50:30,054 WARN L197 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2020-12-22 23:50:30,884 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-22 23:50:35,136 WARN L197 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-12-22 23:50:52,853 WARN L197 SmtUtils]: Spent 9.13 s on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2020-12-22 23:50:58,560 WARN L197 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-12-22 23:51:07,905 WARN L197 SmtUtils]: Spent 4.58 s on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2020-12-22 23:51:08,434 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-22 23:51:14,636 WARN L197 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2020-12-22 23:51:33,444 WARN L197 SmtUtils]: Spent 10.73 s on a formula simplification. DAG size of input: 111 DAG size of output: 81 [2020-12-22 23:51:55,915 WARN L197 SmtUtils]: Spent 11.99 s on a formula simplification. DAG size of input: 130 DAG size of output: 82 [2020-12-22 23:52:03,970 WARN L197 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 23:52:08,713 WARN L197 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2020-12-22 23:52:12,135 WARN L197 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-12-22 23:52:22,515 WARN L197 SmtUtils]: Spent 5.57 s on a formula simplification. DAG size of input: 114 DAG size of output: 71