/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/loops/eureka_01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:36:48,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:36:48,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:36:48,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:36:48,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:36:48,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:36:48,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:36:48,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:36:48,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:36:48,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:36:48,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:36:48,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:36:48,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:36:48,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:36:48,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:36:48,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:36:48,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:36:48,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:36:48,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:36:48,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:36:48,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:36:48,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:36:48,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:36:48,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:36:48,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:36:48,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:36:48,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:36:48,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:36:48,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:36:48,486 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:36:48,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:36:48,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:36:48,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:36:48,489 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:36:48,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:36:48,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:36:48,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:36:48,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:36:48,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:36:48,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:36:48,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:36:48,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:36:48,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:36:48,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:36:48,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:36:48,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:36:48,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:36:48,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:36:48,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:36:48,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:36:48,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:36:48,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:36:48,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:36:48,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:36:48,496 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:36:48,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:36:48,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:36:48,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:36:48,978 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:36:48,979 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:36:48,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/eureka_01-1.c [2021-01-06 16:36:49,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e60b4f8a6/a4a4810f322744ce9b0cb2be5d9028b0/FLAG01820ab8b [2021-01-06 16:36:49,794 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:36:49,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-1.c [2021-01-06 16:36:49,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e60b4f8a6/a4a4810f322744ce9b0cb2be5d9028b0/FLAG01820ab8b [2021-01-06 16:36:50,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e60b4f8a6/a4a4810f322744ce9b0cb2be5d9028b0 [2021-01-06 16:36:50,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:36:50,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:36:50,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:36:50,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:36:50,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:36:50,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:36:50" (1/1) ... [2021-01-06 16:36:50,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e98deed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:50, skipping insertion in model container [2021-01-06 16:36:50,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:36:50" (1/1) ... [2021-01-06 16:36:50,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:36:50,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:36:50,422 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/loops/eureka_01-1.c[446,459] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~distance~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~distance~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~distance~0,],[IdentifierExpression[~x~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:36:50,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:36:50,520 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:36:50,540 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/loops/eureka_01-1.c[446,459] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#distance~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#distance~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#distance~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#distance~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#distance~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#distance~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~x~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:36:50,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:36:50,632 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:36:50,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:50 WrapperNode [2021-01-06 16:36:50,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:36:50,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:36:50,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:36:50,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:36:50,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:50" (1/1) ... [2021-01-06 16:36:50,674 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:50" (1/1) ... [2021-01-06 16:36:50,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:36:50,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:36:50,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:36:50,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:36:50,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:50" (1/1) ... [2021-01-06 16:36:50,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:50" (1/1) ... [2021-01-06 16:36:50,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:50" (1/1) ... [2021-01-06 16:36:50,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:50" (1/1) ... [2021-01-06 16:36:50,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:50" (1/1) ... [2021-01-06 16:36:50,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:50" (1/1) ... [2021-01-06 16:36:50,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:50" (1/1) ... [2021-01-06 16:36:50,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:36:50,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:36:50,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:36:50,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:36:50,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:36:50,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:36:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:36:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:36:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:36:50,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:36:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:36:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:36:51,524 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:36:51,525 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 16:36:51,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:36:51 BoogieIcfgContainer [2021-01-06 16:36:51,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:36:51,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:36:51,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:36:51,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:36:51,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:36:50" (1/3) ... [2021-01-06 16:36:51,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20df3c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:36:51, skipping insertion in model container [2021-01-06 16:36:51,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:50" (2/3) ... [2021-01-06 16:36:51,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20df3c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:36:51, skipping insertion in model container [2021-01-06 16:36:51,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:36:51" (3/3) ... [2021-01-06 16:36:51,553 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2021-01-06 16:36:51,563 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:36:51,573 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:36:51,592 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:36:51,618 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:36:51,618 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:36:51,618 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:36:51,618 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:36:51,618 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:36:51,619 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:36:51,619 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:36:51,619 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:36:51,634 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2021-01-06 16:36:51,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:36:51,640 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:51,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:51,641 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:51,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1963003136, now seen corresponding path program 1 times [2021-01-06 16:36:51,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:51,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668320783] [2021-01-06 16:36:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:36:52,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668320783] [2021-01-06 16:36:52,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:36:52,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 16:36:52,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78912747] [2021-01-06 16:36:52,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:36:52,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:36:52,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:36:52,042 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2021-01-06 16:36:52,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:52,237 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2021-01-06 16:36:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:36:52,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 16:36:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:52,267 INFO L225 Difference]: With dead ends: 89 [2021-01-06 16:36:52,268 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:36:52,273 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 [2021-01-06 16:36:52,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:36:52,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2021-01-06 16:36:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:36:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-01-06 16:36:52,334 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2021-01-06 16:36:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:52,335 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-01-06 16:36:52,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:36:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-01-06 16:36:52,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:36:52,337 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:52,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:52,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:36:52,339 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:52,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:52,341 INFO L82 PathProgramCache]: Analyzing trace with hash 629591390, now seen corresponding path program 1 times [2021-01-06 16:36:52,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:52,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408778872] [2021-01-06 16:36:52,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:36:52,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408778872] [2021-01-06 16:36:52,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685481970] [2021-01-06 16:36:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:52,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:36:52,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:52,897 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 18 treesize of output 14 [2021-01-06 16:36:52,898 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:36:52,910 INFO L625 ElimStorePlain]: treesize reduction 7, result has 72.0 percent of original size [2021-01-06 16:36:52,912 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:36:52,912 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-01-06 16:36:52,970 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:36:52,977 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:36:52,982 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:36:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:36:52,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:52,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:36:52,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245175205] [2021-01-06 16:36:53,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:36:53,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:53,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:36:53,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:36:53,002 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 7 states. [2021-01-06 16:36:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:53,190 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2021-01-06 16:36:53,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:36:53,190 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2021-01-06 16:36:53,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:53,192 INFO L225 Difference]: With dead ends: 70 [2021-01-06 16:36:53,192 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 16:36:53,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:36:53,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 16:36:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2021-01-06 16:36:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:36:53,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2021-01-06 16:36:53,204 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2021-01-06 16:36:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:53,205 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2021-01-06 16:36:53,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:36:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2021-01-06 16:36:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:36:53,206 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:53,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:53,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:36:53,420 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:53,422 INFO L82 PathProgramCache]: Analyzing trace with hash -381525860, now seen corresponding path program 1 times [2021-01-06 16:36:53,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:53,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601657517] [2021-01-06 16:36:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:36:53,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601657517] [2021-01-06 16:36:53,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:36:53,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:36:53,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220706244] [2021-01-06 16:36:53,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:36:53,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:53,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:36:53,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:36:53,499 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 3 states. [2021-01-06 16:36:53,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:53,549 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2021-01-06 16:36:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:36:53,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 16:36:53,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:53,551 INFO L225 Difference]: With dead ends: 66 [2021-01-06 16:36:53,551 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 16:36:53,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:36:53,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 16:36:53,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-01-06 16:36:53,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 16:36:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-01-06 16:36:53,562 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 19 [2021-01-06 16:36:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:53,562 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-01-06 16:36:53,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:36:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-01-06 16:36:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:36:53,563 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:53,564 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] [2021-01-06 16:36:53,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:36:53,564 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:53,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:53,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1960843935, now seen corresponding path program 1 times [2021-01-06 16:36:53,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:53,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332740264] [2021-01-06 16:36:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:36:53,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332740264] [2021-01-06 16:36:53,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291832471] [2021-01-06 16:36:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:53,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:36:53,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:36:53,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:53,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-01-06 16:36:53,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145451418] [2021-01-06 16:36:53,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:36:53,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:53,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:36:53,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:36:53,835 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 8 states. [2021-01-06 16:36:53,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:53,934 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2021-01-06 16:36:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:36:53,934 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2021-01-06 16:36:53,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:53,936 INFO L225 Difference]: With dead ends: 114 [2021-01-06 16:36:53,936 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 16:36:53,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:36:53,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 16:36:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2021-01-06 16:36:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 16:36:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2021-01-06 16:36:53,947 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 22 [2021-01-06 16:36:53,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:53,948 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2021-01-06 16:36:53,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:36:53,948 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2021-01-06 16:36:53,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:36:53,949 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:53,949 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] [2021-01-06 16:36:54,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:54,164 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:54,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:54,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1926841972, now seen corresponding path program 1 times [2021-01-06 16:36:54,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:54,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257527132] [2021-01-06 16:36:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:36:54,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257527132] [2021-01-06 16:36:54,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435322731] [2021-01-06 16:36:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:54,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:36:54,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:36:54,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:54,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 16:36:54,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965479970] [2021-01-06 16:36:54,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:36:54,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:54,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:36:54,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:36:54,432 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 10 states. [2021-01-06 16:36:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:54,683 INFO L93 Difference]: Finished difference Result 181 states and 231 transitions. [2021-01-06 16:36:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:36:54,684 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2021-01-06 16:36:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:54,689 INFO L225 Difference]: With dead ends: 181 [2021-01-06 16:36:54,689 INFO L226 Difference]: Without dead ends: 159 [2021-01-06 16:36:54,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:36:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-01-06 16:36:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 75. [2021-01-06 16:36:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 16:36:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-01-06 16:36:54,709 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 22 [2021-01-06 16:36:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:54,710 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-01-06 16:36:54,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:36:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-01-06 16:36:54,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:36:54,711 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:54,711 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:54,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:54,926 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:54,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:54,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1234267636, now seen corresponding path program 1 times [2021-01-06 16:36:54,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:54,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184264197] [2021-01-06 16:36:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:36:54,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184264197] [2021-01-06 16:36:54,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331287283] [2021-01-06 16:36:54,993 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:55,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:36:55,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:36:55,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:55,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 16:36:55,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191399176] [2021-01-06 16:36:55,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:36:55,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:55,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:36:55,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:36:55,140 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand 10 states. [2021-01-06 16:36:55,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:55,304 INFO L93 Difference]: Finished difference Result 206 states and 263 transitions. [2021-01-06 16:36:55,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:36:55,304 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2021-01-06 16:36:55,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:55,306 INFO L225 Difference]: With dead ends: 206 [2021-01-06 16:36:55,306 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 16:36:55,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:36:55,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 16:36:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 92. [2021-01-06 16:36:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 16:36:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2021-01-06 16:36:55,327 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 23 [2021-01-06 16:36:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:55,327 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2021-01-06 16:36:55,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:36:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2021-01-06 16:36:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:36:55,330 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:55,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:55,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:55,543 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:55,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1741027445, now seen corresponding path program 1 times [2021-01-06 16:36:55,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:55,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740250231] [2021-01-06 16:36:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:36:55,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740250231] [2021-01-06 16:36:55,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189472908] [2021-01-06 16:36:55,984 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 [2021-01-06 16:36:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:56,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:36:56,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:56,125 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 18 treesize of output 16 [2021-01-06 16:36:56,127 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:36:56,150 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:36:56,156 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 16:36:56,157 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:32 [2021-01-06 16:36:56,232 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:36:56,233 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 40 [2021-01-06 16:36:56,236 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:36:56,259 INFO L625 ElimStorePlain]: treesize reduction 24, result has 57.1 percent of original size [2021-01-06 16:36:56,262 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 16:36:56,262 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:32 [2021-01-06 16:36:56,496 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:36:56,497 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 121 [2021-01-06 16:36:56,503 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:36:56,504 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2021-01-06 16:36:56,506 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:36:56,512 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:36:56,557 INFO L625 ElimStorePlain]: treesize reduction 51, result has 50.5 percent of original size [2021-01-06 16:36:56,561 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 16:36:56,561 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:54, output treesize:52 [2021-01-06 16:36:56,888 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:36:56,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:36:56,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 16:36:56,909 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:36:56,913 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 16:36:56,919 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 16:36:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:36:56,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:56,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 16:36:56,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625088247] [2021-01-06 16:36:56,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:36:56,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:56,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:36:56,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:36:56,957 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand 20 states. [2021-01-06 16:36:59,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:59,507 INFO L93 Difference]: Finished difference Result 252 states and 308 transitions. [2021-01-06 16:36:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:36:59,508 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2021-01-06 16:36:59,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:59,511 INFO L225 Difference]: With dead ends: 252 [2021-01-06 16:36:59,512 INFO L226 Difference]: Without dead ends: 230 [2021-01-06 16:36:59,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=622, Invalid=2240, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:36:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-01-06 16:36:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 96. [2021-01-06 16:36:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 16:36:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2021-01-06 16:36:59,532 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 25 [2021-01-06 16:36:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:59,532 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2021-01-06 16:36:59,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:36:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2021-01-06 16:36:59,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:36:59,534 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:59,534 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:59,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:36:59,749 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash -858936254, now seen corresponding path program 2 times [2021-01-06 16:36:59,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:59,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573472715] [2021-01-06 16:36:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 16:36:59,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573472715] [2021-01-06 16:36:59,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53799542] [2021-01-06 16:36:59,949 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:00,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:37:00,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:37:00,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:37:00,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:37:00,051 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:37:00,052 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:00,057 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:37:00,058 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:37:00,058 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2021-01-06 16:37:00,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:00,099 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-01-06 16:37:00,101 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:00,109 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:37:00,112 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:37:00,112 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:18 [2021-01-06 16:37:00,140 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:00,142 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 16:37:00,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:37:00,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-01-06 16:37:00,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832679398] [2021-01-06 16:37:00,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:37:00,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:37:00,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:37:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:37:00,177 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand 10 states. [2021-01-06 16:37:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:37:00,454 INFO L93 Difference]: Finished difference Result 159 states and 205 transitions. [2021-01-06 16:37:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:37:00,455 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2021-01-06 16:37:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:37:00,456 INFO L225 Difference]: With dead ends: 159 [2021-01-06 16:37:00,456 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 16:37:00,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:37:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 16:37:00,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 106. [2021-01-06 16:37:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 16:37:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2021-01-06 16:37:00,483 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 25 [2021-01-06 16:37:00,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:37:00,483 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-01-06 16:37:00,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:37:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2021-01-06 16:37:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:37:00,488 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:37:00,488 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] [2021-01-06 16:37:00,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:00,704 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:37:00,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:37:00,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1096380170, now seen corresponding path program 2 times [2021-01-06 16:37:00,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:37:00,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743059128] [2021-01-06 16:37:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:37:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:37:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:37:00,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743059128] [2021-01-06 16:37:00,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359474755] [2021-01-06 16:37:00,763 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:00,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:37:00,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:37:00,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:37:00,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:37:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:37:00,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:37:00,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 16:37:00,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101167279] [2021-01-06 16:37:00,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:37:00,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:37:00,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:37:00,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:37:00,932 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand 10 states. [2021-01-06 16:37:01,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:37:01,144 INFO L93 Difference]: Finished difference Result 216 states and 272 transitions. [2021-01-06 16:37:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:37:01,145 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2021-01-06 16:37:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:37:01,146 INFO L225 Difference]: With dead ends: 216 [2021-01-06 16:37:01,146 INFO L226 Difference]: Without dead ends: 203 [2021-01-06 16:37:01,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:37:01,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-01-06 16:37:01,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 148. [2021-01-06 16:37:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2021-01-06 16:37:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 196 transitions. [2021-01-06 16:37:01,171 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 196 transitions. Word has length 28 [2021-01-06 16:37:01,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:37:01,171 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 196 transitions. [2021-01-06 16:37:01,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:37:01,171 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 196 transitions. [2021-01-06 16:37:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:37:01,172 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:37:01,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:37:01,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:01,387 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:37:01,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:37:01,388 INFO L82 PathProgramCache]: Analyzing trace with hash 160714710, now seen corresponding path program 2 times [2021-01-06 16:37:01,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:37:01,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957195621] [2021-01-06 16:37:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:37:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:37:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 16:37:01,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957195621] [2021-01-06 16:37:01,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222359098] [2021-01-06 16:37:01,473 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:01,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:37:01,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:37:01,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:37:01,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:37:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 16:37:01,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:37:01,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-01-06 16:37:01,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549105599] [2021-01-06 16:37:01,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:37:01,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:37:01,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:37:01,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:37:01,613 INFO L87 Difference]: Start difference. First operand 148 states and 196 transitions. Second operand 4 states. [2021-01-06 16:37:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:37:01,685 INFO L93 Difference]: Finished difference Result 246 states and 322 transitions. [2021-01-06 16:37:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:37:01,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-01-06 16:37:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:37:01,689 INFO L225 Difference]: With dead ends: 246 [2021-01-06 16:37:01,689 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 16:37:01,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:37:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 16:37:01,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2021-01-06 16:37:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-01-06 16:37:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2021-01-06 16:37:01,713 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 29 [2021-01-06 16:37:01,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:37:01,715 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2021-01-06 16:37:01,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:37:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2021-01-06 16:37:01,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:37:01,716 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:37:01,716 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] [2021-01-06 16:37:01,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:37:01,930 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:37:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:37:01,931 INFO L82 PathProgramCache]: Analyzing trace with hash 583416536, now seen corresponding path program 1 times [2021-01-06 16:37:01,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:37:01,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771780348] [2021-01-06 16:37:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:37:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:37:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 16:37:02,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771780348] [2021-01-06 16:37:02,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144838330] [2021-01-06 16:37:02,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:37:02,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:37:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:37:02,220 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 16:37:02,221 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:02,225 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:37:02,225 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:37:02,226 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2021-01-06 16:37:02,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:02,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:02,278 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 16:37:02,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:37:02,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 16:37:02,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975547816] [2021-01-06 16:37:02,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:37:02,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:37:02,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:37:02,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:37:02,294 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand 15 states. [2021-01-06 16:37:02,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:37:02,766 INFO L93 Difference]: Finished difference Result 183 states and 226 transitions. [2021-01-06 16:37:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:37:02,766 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2021-01-06 16:37:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:37:02,768 INFO L225 Difference]: With dead ends: 183 [2021-01-06 16:37:02,768 INFO L226 Difference]: Without dead ends: 181 [2021-01-06 16:37:02,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:37:02,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-01-06 16:37:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2021-01-06 16:37:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 16:37:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2021-01-06 16:37:02,786 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 29 [2021-01-06 16:37:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:37:02,786 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2021-01-06 16:37:02,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:37:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2021-01-06 16:37:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:37:02,787 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:37:02,787 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] [2021-01-06 16:37:03,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:03,003 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:37:03,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:37:03,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1240772930, now seen corresponding path program 3 times [2021-01-06 16:37:03,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:37:03,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205155451] [2021-01-06 16:37:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:37:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:37:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:37:03,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205155451] [2021-01-06 16:37:03,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727596327] [2021-01-06 16:37:03,643 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:03,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:37:03,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:37:03,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:37:03,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:37:03,855 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 18 treesize of output 16 [2021-01-06 16:37:03,857 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:03,882 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:37:03,884 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:37:03,884 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:73 [2021-01-06 16:37:03,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:03,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:03,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:03,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:03,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:03,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,012 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:37:04,012 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 60 treesize of output 82 [2021-01-06 16:37:04,015 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:04,062 INFO L625 ElimStorePlain]: treesize reduction 20, result has 78.5 percent of original size [2021-01-06 16:37:04,064 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:37:04,064 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:81, output treesize:73 [2021-01-06 16:37:04,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:37:04,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,581 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2021-01-06 16:37:04,583 INFO L348 Elim1Store]: treesize reduction 16, result has 94.7 percent of original size [2021-01-06 16:37:04,583 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 82 treesize of output 335 [2021-01-06 16:37:04,594 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:04,599 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:04,668 INFO L625 ElimStorePlain]: treesize reduction 41, result has 68.5 percent of original size [2021-01-06 16:37:04,672 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 16:37:04,673 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:89 [2021-01-06 16:37:04,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:04,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:05,397 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 119 [2021-01-06 16:37:05,399 INFO L348 Elim1Store]: treesize reduction 14, result has 96.6 percent of original size [2021-01-06 16:37:05,399 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 38 case distinctions, treesize of input 87 treesize of output 452 [2021-01-06 16:37:05,412 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:37:05,413 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:37:05,413 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 16:37:05,416 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 16:37:05,417 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2021-01-06 16:37:05,418 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2021-01-06 16:37:05,419 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:37:05,419 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:37:05,420 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:05,421 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2021-01-06 16:37:05,423 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:37:05,424 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:05,433 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:05,533 INFO L625 ElimStorePlain]: treesize reduction 90, result has 54.5 percent of original size [2021-01-06 16:37:05,536 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:37:05,539 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 16:37:05,543 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-01-06 16:37:05,544 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:104, output treesize:108 [2021-01-06 16:37:05,552 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:37:05,553 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 16:37:06,039 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-01-06 16:37:06,052 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:37:06,054 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 16:37:06,999 WARN L197 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-01-06 16:37:07,017 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:07,697 WARN L197 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-01-06 16:37:08,689 WARN L197 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-01-06 16:37:08,763 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:09,489 WARN L197 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-01-06 16:37:09,508 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:09,844 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:09,847 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:37:09,849 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 16:37:09,859 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:37:09,861 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 16:37:09,865 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 14 disjuncts [2021-01-06 16:37:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:37:09,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:37:09,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-01-06 16:37:09,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154813745] [2021-01-06 16:37:09,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:37:09,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:37:09,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:37:09,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:37:09,951 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand 29 states. [2021-01-06 16:37:13,489 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2021-01-06 16:37:13,668 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-01-06 16:37:14,005 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2021-01-06 16:37:14,268 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 75 [2021-01-06 16:37:16,292 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2021-01-06 16:37:17,195 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 82 [2021-01-06 16:37:22,800 WARN L197 SmtUtils]: Spent 5.47 s on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2021-01-06 16:37:23,238 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 83 [2021-01-06 16:37:23,688 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-01-06 16:37:24,393 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-01-06 16:37:25,169 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 84 [2021-01-06 16:37:25,477 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2021-01-06 16:37:25,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:37:25,479 INFO L93 Difference]: Finished difference Result 186 states and 228 transitions. [2021-01-06 16:37:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:37:25,479 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2021-01-06 16:37:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:37:25,481 INFO L225 Difference]: With dead ends: 186 [2021-01-06 16:37:25,481 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 16:37:25,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=515, Invalid=2136, Unknown=1, NotChecked=0, Total=2652 [2021-01-06 16:37:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 16:37:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2021-01-06 16:37:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 16:37:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2021-01-06 16:37:25,505 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 31 [2021-01-06 16:37:25,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:37:25,507 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2021-01-06 16:37:25,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:37:25,507 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2021-01-06 16:37:25,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:37:25,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:37:25,509 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 16:37:25,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:25,710 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:37:25,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:37:25,711 INFO L82 PathProgramCache]: Analyzing trace with hash -956621735, now seen corresponding path program 1 times [2021-01-06 16:37:25,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:37:25,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133307339] [2021-01-06 16:37:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:37:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:37:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:37:25,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133307339] [2021-01-06 16:37:25,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:37:25,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 16:37:25,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077051700] [2021-01-06 16:37:25,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:37:25,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:37:25,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:37:25,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:37:25,764 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand 5 states. [2021-01-06 16:37:25,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:37:25,804 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2021-01-06 16:37:25,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:37:25,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2021-01-06 16:37:25,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:37:25,806 INFO L225 Difference]: With dead ends: 197 [2021-01-06 16:37:25,806 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 16:37:25,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:37:25,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 16:37:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2021-01-06 16:37:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 16:37:25,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 152 transitions. [2021-01-06 16:37:25,822 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 152 transitions. Word has length 31 [2021-01-06 16:37:25,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:37:25,822 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 152 transitions. [2021-01-06 16:37:25,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:37:25,823 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 152 transitions. [2021-01-06 16:37:25,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:37:25,823 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:37:25,823 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] [2021-01-06 16:37:25,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-01-06 16:37:25,824 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:37:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:37:25,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1777758610, now seen corresponding path program 2 times [2021-01-06 16:37:25,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:37:25,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964892458] [2021-01-06 16:37:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:37:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:37:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 16:37:25,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964892458] [2021-01-06 16:37:25,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466797356] [2021-01-06 16:37:25,886 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:25,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:37:25,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:37:25,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:37:25,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:37:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 16:37:26,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:37:26,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 16:37:26,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164122281] [2021-01-06 16:37:26,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:37:26,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:37:26,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:37:26,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:37:26,050 INFO L87 Difference]: Start difference. First operand 121 states and 152 transitions. Second operand 13 states. [2021-01-06 16:37:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:37:26,335 INFO L93 Difference]: Finished difference Result 403 states and 505 transitions. [2021-01-06 16:37:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:37:26,336 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2021-01-06 16:37:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:37:26,338 INFO L225 Difference]: With dead ends: 403 [2021-01-06 16:37:26,338 INFO L226 Difference]: Without dead ends: 298 [2021-01-06 16:37:26,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:37:26,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-01-06 16:37:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 204. [2021-01-06 16:37:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2021-01-06 16:37:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2021-01-06 16:37:26,372 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 33 [2021-01-06 16:37:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:37:26,372 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2021-01-06 16:37:26,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:37:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2021-01-06 16:37:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:37:26,373 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:37:26,373 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 16:37:26,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:37:26,581 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:37:26,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:37:26,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1071791489, now seen corresponding path program 4 times [2021-01-06 16:37:26,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:37:26,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105216213] [2021-01-06 16:37:26,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:37:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:37:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:37:26,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105216213] [2021-01-06 16:37:26,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933094031] [2021-01-06 16:37:26,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:26,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:37:26,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:37:26,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:37:26,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:37:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:37:26,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:37:26,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 16:37:26,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206045059] [2021-01-06 16:37:26,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:37:26,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:37:26,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:37:26,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:37:26,805 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand 13 states. [2021-01-06 16:37:27,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:37:27,158 INFO L93 Difference]: Finished difference Result 487 states and 611 transitions. [2021-01-06 16:37:27,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:37:27,159 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2021-01-06 16:37:27,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:37:27,162 INFO L225 Difference]: With dead ends: 487 [2021-01-06 16:37:27,162 INFO L226 Difference]: Without dead ends: 465 [2021-01-06 16:37:27,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:37:27,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-01-06 16:37:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 289. [2021-01-06 16:37:27,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2021-01-06 16:37:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 379 transitions. [2021-01-06 16:37:27,204 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 379 transitions. Word has length 34 [2021-01-06 16:37:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:37:27,205 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 379 transitions. [2021-01-06 16:37:27,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:37:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 379 transitions. [2021-01-06 16:37:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:37:27,206 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:37:27,206 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] [2021-01-06 16:37:27,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:37:27,419 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:37:27,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:37:27,420 INFO L82 PathProgramCache]: Analyzing trace with hash -715108188, now seen corresponding path program 2 times [2021-01-06 16:37:27,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:37:27,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917615434] [2021-01-06 16:37:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:37:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:37:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:37:28,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917615434] [2021-01-06 16:37:28,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425116416] [2021-01-06 16:37:28,097 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:28,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:37:28,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:37:28,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:37:28,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:37:28,204 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:37:28,204 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 31 [2021-01-06 16:37:28,207 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:28,222 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:37:28,223 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:37:28,224 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:32 [2021-01-06 16:37:28,374 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 22 [2021-01-06 16:37:28,375 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:28,392 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:37:28,393 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:37:28,393 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:46 [2021-01-06 16:37:28,609 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:37:28,610 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 100 [2021-01-06 16:37:28,613 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:37:28,614 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:28,617 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:28,681 INFO L625 ElimStorePlain]: treesize reduction 125, result has 35.2 percent of original size [2021-01-06 16:37:28,682 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:37:28,682 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:98, output treesize:68 [2021-01-06 16:37:28,838 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:37:28,839 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 55 [2021-01-06 16:37:28,843 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:28,843 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:28,845 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:28,847 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2021-01-06 16:37:28,848 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:28,873 INFO L625 ElimStorePlain]: treesize reduction 26, result has 51.9 percent of original size [2021-01-06 16:37:28,874 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:37:28,875 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:12 [2021-01-06 16:37:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:37:28,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:37:28,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-01-06 16:37:28,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771004450] [2021-01-06 16:37:28,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:37:28,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:37:28,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:37:28,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:37:28,920 INFO L87 Difference]: Start difference. First operand 289 states and 379 transitions. Second operand 24 states. [2021-01-06 16:37:30,626 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-01-06 16:37:33,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:37:33,970 INFO L93 Difference]: Finished difference Result 858 states and 1076 transitions. [2021-01-06 16:37:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 16:37:33,970 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2021-01-06 16:37:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:37:33,974 INFO L225 Difference]: With dead ends: 858 [2021-01-06 16:37:33,975 INFO L226 Difference]: Without dead ends: 771 [2021-01-06 16:37:33,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2267 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=970, Invalid=6170, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:37:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-01-06 16:37:34,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 414. [2021-01-06 16:37:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2021-01-06 16:37:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 558 transitions. [2021-01-06 16:37:34,041 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 558 transitions. Word has length 34 [2021-01-06 16:37:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:37:34,042 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 558 transitions. [2021-01-06 16:37:34,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:37:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 558 transitions. [2021-01-06 16:37:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:37:34,043 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:37:34,043 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 16:37:34,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:37:34,259 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:37:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:37:34,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1136182421, now seen corresponding path program 5 times [2021-01-06 16:37:34,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:37:34,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756168756] [2021-01-06 16:37:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:37:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:37:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 16:37:35,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756168756] [2021-01-06 16:37:35,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440567672] [2021-01-06 16:37:35,652 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:35,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 16:37:35,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:37:35,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:37:35,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:37:35,944 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:37:35,944 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 31 [2021-01-06 16:37:35,946 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:35,967 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:37:35,969 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:37:35,969 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:48 [2021-01-06 16:37:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,037 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2021-01-06 16:37:36,043 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:36,073 INFO L625 ElimStorePlain]: treesize reduction 4, result has 92.3 percent of original size [2021-01-06 16:37:36,076 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:37:36,077 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:48 [2021-01-06 16:37:36,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:37:36,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,491 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-01-06 16:37:36,492 INFO L348 Elim1Store]: treesize reduction 8, result has 96.6 percent of original size [2021-01-06 16:37:36,493 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 259 [2021-01-06 16:37:36,498 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:36,499 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:36,510 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:36,547 INFO L625 ElimStorePlain]: treesize reduction 15, result has 80.5 percent of original size [2021-01-06 16:37:36,548 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:37:36,548 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:62 [2021-01-06 16:37:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:36,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:37:36,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:37:37,147 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-01-06 16:37:37,149 INFO L348 Elim1Store]: treesize reduction 8, result has 97.6 percent of original size [2021-01-06 16:37:37,149 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 79 treesize of output 359 [2021-01-06 16:37:37,156 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:37,158 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:37:37,159 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:37:37,160 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:37:37,164 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:37,239 INFO L625 ElimStorePlain]: treesize reduction 67, result has 56.8 percent of original size [2021-01-06 16:37:37,241 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:37:37,241 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:88, output treesize:88 [2021-01-06 16:37:37,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:37,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:37,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:37,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:37,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:37,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:37,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:37,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:37,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:37:37,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:37:37,780 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-01-06 16:37:37,781 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:37:37,781 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 452 [2021-01-06 16:37:37,791 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2021-01-06 16:37:37,792 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:37:37,794 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2021-01-06 16:37:37,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:37:37,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:37:37,800 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:37:37,891 INFO L625 ElimStorePlain]: treesize reduction 117, result has 46.8 percent of original size [2021-01-06 16:37:37,893 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 16:37:37,893 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:105, output treesize:103 [2021-01-06 16:37:48,040 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 51 [2021-01-06 16:37:52,207 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 53 [2021-01-06 16:37:58,516 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:58,518 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:37:58,522 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:37:58,524 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2021-01-06 16:37:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 16:37:58,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:37:58,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-01-06 16:37:58,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758591528] [2021-01-06 16:37:58,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:37:58,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:37:58,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:37:58,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=917, Unknown=6, NotChecked=0, Total=1056 [2021-01-06 16:37:58,592 INFO L87 Difference]: Start difference. First operand 414 states and 558 transitions. Second operand 33 states. [2021-01-06 16:38:02,124 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-01-06 16:38:03,571 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2021-01-06 16:38:04,485 WARN L197 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2021-01-06 16:38:06,648 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-01-06 16:38:09,287 WARN L197 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-01-06 16:38:13,503 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-01-06 16:38:15,722 WARN L197 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-01-06 16:38:16,091 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-01-06 16:38:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:38:16,201 INFO L93 Difference]: Finished difference Result 476 states and 629 transitions. [2021-01-06 16:38:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:38:16,201 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2021-01-06 16:38:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:38:16,206 INFO L225 Difference]: With dead ends: 476 [2021-01-06 16:38:16,206 INFO L226 Difference]: Without dead ends: 438 [2021-01-06 16:38:16,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=500, Invalid=2464, Unknown=6, NotChecked=0, Total=2970 [2021-01-06 16:38:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-01-06 16:38:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 417. [2021-01-06 16:38:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2021-01-06 16:38:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 562 transitions. [2021-01-06 16:38:16,262 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 562 transitions. Word has length 37 [2021-01-06 16:38:16,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:38:16,262 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 562 transitions. [2021-01-06 16:38:16,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:38:16,262 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 562 transitions. [2021-01-06 16:38:16,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:38:16,263 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:38:16,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:38:16,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:38:16,477 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:38:16,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:38:16,478 INFO L82 PathProgramCache]: Analyzing trace with hash 301030412, now seen corresponding path program 1 times [2021-01-06 16:38:16,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:38:16,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659479406] [2021-01-06 16:38:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:38:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:38:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:38:16,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659479406] [2021-01-06 16:38:16,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121107971] [2021-01-06 16:38:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:38:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:38:16,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:38:16,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:38:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:38:16,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:38:16,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 16:38:16,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666784785] [2021-01-06 16:38:16,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:38:16,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:38:16,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:38:16,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:38:16,738 INFO L87 Difference]: Start difference. First operand 417 states and 562 transitions. Second operand 13 states. [2021-01-06 16:38:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:38:17,178 INFO L93 Difference]: Finished difference Result 583 states and 765 transitions. [2021-01-06 16:38:17,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:38:17,179 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2021-01-06 16:38:17,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:38:17,182 INFO L225 Difference]: With dead ends: 583 [2021-01-06 16:38:17,182 INFO L226 Difference]: Without dead ends: 561 [2021-01-06 16:38:17,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:38:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-01-06 16:38:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 416. [2021-01-06 16:38:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2021-01-06 16:38:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 556 transitions. [2021-01-06 16:38:17,247 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 556 transitions. Word has length 37 [2021-01-06 16:38:17,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:38:17,247 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 556 transitions. [2021-01-06 16:38:17,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:38:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 556 transitions. [2021-01-06 16:38:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:38:17,249 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:38:17,249 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] [2021-01-06 16:38:17,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:38:17,453 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:38:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:38:17,453 INFO L82 PathProgramCache]: Analyzing trace with hash 670016120, now seen corresponding path program 1 times [2021-01-06 16:38:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:38:17,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600216602] [2021-01-06 16:38:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:38:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:38:17,529 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:38:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:38:17,574 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:38:17,619 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:38:17,619 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:38:17,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-01-06 16:38:17,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:38:17 BoogieIcfgContainer [2021-01-06 16:38:17,712 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:38:17,713 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:38:17,713 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:38:17,713 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:38:17,714 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:36:51" (3/4) ... [2021-01-06 16:38:17,716 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 16:38:17,781 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/eureka_01-1.c-witness.graphml [2021-01-06 16:38:17,781 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:38:17,782 INFO L168 Benchmark]: Toolchain (without parser) took 87611.83 ms. Allocated memory was 157.3 MB in the beginning and 332.4 MB in the end (delta: 175.1 MB). Free memory was 132.4 MB in the beginning and 146.8 MB in the end (delta: -14.5 MB). Peak memory consumption was 161.8 MB. Max. memory is 8.0 GB. [2021-01-06 16:38:17,783 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:38:17,783 INFO L168 Benchmark]: CACSL2BoogieTranslator took 458.81 ms. Allocated memory is still 157.3 MB. Free memory was 132.2 MB in the beginning and 120.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:38:17,783 INFO L168 Benchmark]: Boogie Procedure Inliner took 101.57 ms. Allocated memory is still 157.3 MB. Free memory was 120.9 MB in the beginning and 118.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:38:17,784 INFO L168 Benchmark]: Boogie Preprocessor took 88.13 ms. Allocated memory is still 157.3 MB. Free memory was 118.8 MB in the beginning and 117.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:38:17,784 INFO L168 Benchmark]: RCFGBuilder took 702.07 ms. Allocated memory is still 157.3 MB. Free memory was 116.8 MB in the beginning and 133.5 MB in the end (delta: -16.6 MB). Peak memory consumption was 19.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:38:17,785 INFO L168 Benchmark]: TraceAbstraction took 86176.22 ms. Allocated memory was 157.3 MB in the beginning and 332.4 MB in the end (delta: 175.1 MB). Free memory was 132.9 MB in the beginning and 151.6 MB in the end (delta: -18.6 MB). Peak memory consumption was 158.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:38:17,785 INFO L168 Benchmark]: Witness Printer took 68.45 ms. Allocated memory is still 332.4 MB. Free memory was 151.6 MB in the beginning and 146.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-01-06 16:38:17,787 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 458.81 ms. Allocated memory is still 157.3 MB. Free memory was 132.2 MB in the beginning and 120.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 101.57 ms. Allocated memory is still 157.3 MB. Free memory was 120.9 MB in the beginning and 118.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 88.13 ms. Allocated memory is still 157.3 MB. Free memory was 118.8 MB in the beginning and 117.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 702.07 ms. Allocated memory is still 157.3 MB. Free memory was 116.8 MB in the beginning and 133.5 MB in the end (delta: -16.6 MB). Peak memory consumption was 19.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 86176.22 ms. Allocated memory was 157.3 MB in the beginning and 332.4 MB in the end (delta: 175.1 MB). Free memory was 132.9 MB in the beginning and 151.6 MB in the end (delta: -18.6 MB). Peak memory consumption was 158.1 MB. Max. memory is 8.0 GB. * Witness Printer took 68.45 ms. Allocated memory is still 332.4 MB. Free memory was 151.6 MB in the beginning and 146.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int INFINITY = 899; VAL [INFINITY=899] [L18] int nodecount = __VERIFIER_nondet_int(); [L19] int edgecount = __VERIFIER_nondet_int(); [L20] COND FALSE !(!(0 <= nodecount && nodecount <= 4)) VAL [INFINITY=899] [L21] COND FALSE !(!(0 <= edgecount && edgecount <= 19)) [L22] int source = 0; [L23] int Source[20] = {0,4,1,1,0,0,1,3,4,4,2,2,3,0,0,3,1,2,2,3}; [L24] int Dest[20] = {1,3,4,1,1,4,3,4,3,0,0,0,0,2,3,0,2,1,0,4}; [L25] int Weight[20] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}; [L26] int distance[5]; [L27] int x,y; [L28] int i,j; [L30] i = 0 VAL [INFINITY=899] [L30] COND TRUE i < nodecount VAL [INFINITY=899] [L31] COND TRUE i == source [L32] distance[i] = 0 VAL [INFINITY=899] [L30] i++ VAL [INFINITY=899] [L30] COND TRUE i < nodecount VAL [INFINITY=899] [L31] COND FALSE !(i == source) [L35] distance[i] = INFINITY VAL [INFINITY=899] [L30] i++ VAL [INFINITY=899] [L30] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L39] i = 0 VAL [INFINITY=899] [L39] COND TRUE i < nodecount [L41] j = 0 VAL [INFINITY=899] [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] VAL [INFINITY=899] [L45] COND TRUE distance[x] > distance[y] + Weight[j] [L47] distance[x] = -1 VAL [INFINITY=899] [L41] j++ VAL [INFINITY=899] [L41] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L39] i++ VAL [INFINITY=899] [L39] COND TRUE i < nodecount [L41] j = 0 VAL [INFINITY=899] [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] VAL [INFINITY=899] [L45] COND FALSE !(distance[x] > distance[y] + Weight[j]) [L41] j++ VAL [INFINITY=899] [L41] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L39] i++ VAL [INFINITY=899] [L39] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L51] i = 0 VAL [INFINITY=899] [L51] COND TRUE i < edgecount [L53] EXPR Dest[i] [L53] x = Dest[i] [L54] EXPR Source[i] [L54] y = Source[i] [L55] EXPR distance[x] [L55] EXPR distance[y] [L55] EXPR Weight[i] VAL [INFINITY=899] [L55] COND FALSE !(distance[x] > distance[y] + Weight[i]) [L51] i++ VAL [INFINITY=899] [L51] COND FALSE !(i < edgecount) VAL [INFINITY=899] [L61] i = 0 VAL [INFINITY=899] [L61] COND TRUE i < nodecount [L63] distance[i] [L11] COND FALSE !(!(cond)) VAL [INFINITY=899] [L61] i++ VAL [INFINITY=899] [L61] COND TRUE i < nodecount [L63] distance[i] [L11] COND TRUE !(cond) VAL [INFINITY=899] [L12] reach_error() VAL [INFINITY=899] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 86.0s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 44.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 623 SDtfs, 2529 SDslu, 3004 SDs, 0 SdLazy, 4189 SolverSat, 1196 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 12.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 768 GetRequests, 360 SyntacticMatches, 15 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4626 ImplicationChecksByTransitivity, 57.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=417occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 18 MinimizatonAttempts, 1361 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 35.3s InterpolantComputationTime, 957 NumberOfCodeBlocks, 954 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 886 ConstructedInterpolants, 64 QuantifiedInterpolants, 404374 SizeOfPredicates, 118 NumberOfNonLiveVariables, 3724 ConjunctsInSsa, 254 ConjunctsInUnsatCore, 33 InterpolantComputations, 4 PerfectInterpolantSequences, 146/373 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...