/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-dcfa08f [2020-12-23 06:42:28,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:42:28,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:42:28,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:42:28,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:42:28,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:42:28,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:42:28,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:42:28,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:42:28,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:42:28,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:42:28,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:42:28,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:42:28,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:42:28,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:42:28,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:42:28,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:42:28,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:42:28,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:42:28,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:42:28,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:42:28,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:42:28,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:42:28,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:42:28,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:42:28,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:42:28,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:42:28,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:42:28,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:42:29,020 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:42:29,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:42:29,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:42:29,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:42:29,022 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:42:29,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:42:29,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:42:29,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:42:29,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:42:29,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:42:29,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:42:29,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:42:29,024 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:42:29,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:42:29,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:42:29,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:42:29,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:42:29,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:42:29,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:42:29,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:42:29,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:42:29,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:42:29,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:42:29,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:42:29,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:42:29,026 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:42:29,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:42:29,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:42:29,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:42:29,410 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:42:29,411 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:42:29,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/eureka_01-1.c [2020-12-23 06:42:29,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d2b2f30eb/d57079d3b1a2465dba518287deb9e09e/FLAGffcd24463 [2020-12-23 06:42:30,051 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:42:30,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-1.c [2020-12-23 06:42:30,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d2b2f30eb/d57079d3b1a2465dba518287deb9e09e/FLAGffcd24463 [2020-12-23 06:42:30,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d2b2f30eb/d57079d3b1a2465dba518287deb9e09e [2020-12-23 06:42:30,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:42:30,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:42:30,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:42:30,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:42:30,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:42:30,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:42:30" (1/1) ... [2020-12-23 06:42:30,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8be0d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:30, skipping insertion in model container [2020-12-23 06:42:30,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:42:30" (1/1) ... [2020-12-23 06:42:30,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:42:30,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:42:30,610 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,] [2020-12-23 06:42:30,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:42:30,674 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:42:30,687 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,] [2020-12-23 06:42:30,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:42:30,731 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:42:30,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:30 WrapperNode [2020-12-23 06:42:30,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:42:30,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:42:30,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:42:30,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:42:30,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:30" (1/1) ... [2020-12-23 06:42:30,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:30" (1/1) ... [2020-12-23 06:42:30,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:42:30,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:42:30,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:42:30,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:42:30,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:30" (1/1) ... [2020-12-23 06:42:30,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:30" (1/1) ... [2020-12-23 06:42:30,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:30" (1/1) ... [2020-12-23 06:42:30,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:30" (1/1) ... [2020-12-23 06:42:30,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:30" (1/1) ... [2020-12-23 06:42:30,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:30" (1/1) ... [2020-12-23 06:42:30,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:30" (1/1) ... [2020-12-23 06:42:30,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:42:30,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:42:30,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:42:30,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:42:30,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:42:30,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:42:30,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:42:30,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:42:30,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:42:30,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:42:30,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:42:30,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:42:31,410 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:42:31,411 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 06:42:31,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:42:31 BoogieIcfgContainer [2020-12-23 06:42:31,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:42:31,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:42:31,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:42:31,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:42:31,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:42:30" (1/3) ... [2020-12-23 06:42:31,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb4b1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:42:31, skipping insertion in model container [2020-12-23 06:42:31,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:30" (2/3) ... [2020-12-23 06:42:31,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb4b1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:42:31, skipping insertion in model container [2020-12-23 06:42:31,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:42:31" (3/3) ... [2020-12-23 06:42:31,421 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2020-12-23 06:42:31,431 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:42:31,439 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:42:31,463 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:42:31,491 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:42:31,491 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:42:31,492 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:42:31,492 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:42:31,492 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:42:31,492 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:42:31,492 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:42:31,492 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:42:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-23 06:42:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:42:31,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:31,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:42:31,515 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:31,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:31,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1963003136, now seen corresponding path program 1 times [2020-12-23 06:42:31,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:31,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435535229] [2020-12-23 06:42:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:42:31,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435535229] [2020-12-23 06:42:31,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:42:31,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:42:31,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361197269] [2020-12-23 06:42:31,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:42:31,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:31,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:42:31,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:42:31,920 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-12-23 06:42:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:32,053 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2020-12-23 06:42:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:42:32,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 06:42:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:32,065 INFO L225 Difference]: With dead ends: 89 [2020-12-23 06:42:32,065 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:42:32,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:42:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:42:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2020-12-23 06:42:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 06:42:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-23 06:42:32,107 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2020-12-23 06:42:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:32,108 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-23 06:42:32,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:42:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-23 06:42:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:42:32,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:32,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:42:32,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:42:32,110 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:32,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:32,111 INFO L82 PathProgramCache]: Analyzing trace with hash 629591390, now seen corresponding path program 1 times [2020-12-23 06:42:32,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:32,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092662086] [2020-12-23 06:42:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:42:32,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092662086] [2020-12-23 06:42:32,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532437590] [2020-12-23 06:42:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:42:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:32,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:42:32,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:32,717 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 [2020-12-23 06:42:32,719 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:42:32,732 INFO L625 ElimStorePlain]: treesize reduction 7, result has 72.0 percent of original size [2020-12-23 06:42:32,734 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:42:32,734 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2020-12-23 06:42:32,798 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:32,804 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:32,809 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:42:32,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:42:32,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:42:32,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931804002] [2020-12-23 06:42:32,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:42:32,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:32,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:42:32,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:42:32,858 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 7 states. [2020-12-23 06:42:33,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:33,048 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-12-23 06:42:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:42:33,049 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-23 06:42:33,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:33,054 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:42:33,054 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 06:42:33,055 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 [2020-12-23 06:42:33,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 06:42:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2020-12-23 06:42:33,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 06:42:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-12-23 06:42:33,077 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2020-12-23 06:42:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:33,078 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-12-23 06:42:33,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:42:33,078 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-12-23 06:42:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:42:33,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:33,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:42:33,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:42:33,295 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:33,297 INFO L82 PathProgramCache]: Analyzing trace with hash -381525860, now seen corresponding path program 1 times [2020-12-23 06:42:33,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:33,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632590937] [2020-12-23 06:42:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:42:33,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632590937] [2020-12-23 06:42:33,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:42:33,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:42:33,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523786876] [2020-12-23 06:42:33,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:42:33,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:33,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:42:33,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:42:33,339 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 3 states. [2020-12-23 06:42:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:33,373 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2020-12-23 06:42:33,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:42:33,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 06:42:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:33,375 INFO L225 Difference]: With dead ends: 66 [2020-12-23 06:42:33,375 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 06:42:33,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:42:33,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 06:42:33,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-23 06:42:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 06:42:33,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-12-23 06:42:33,383 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 19 [2020-12-23 06:42:33,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:33,383 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-12-23 06:42:33,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:42:33,384 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-12-23 06:42:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:42:33,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:33,385 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] [2020-12-23 06:42:33,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:42:33,385 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:33,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:33,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1960843935, now seen corresponding path program 1 times [2020-12-23 06:42:33,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:33,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456401823] [2020-12-23 06:42:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:42:33,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456401823] [2020-12-23 06:42:33,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059724662] [2020-12-23 06:42:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:42:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:33,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:42:33,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:42:33,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:42:33,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2020-12-23 06:42:33,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259308635] [2020-12-23 06:42:33,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:42:33,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:33,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:42:33,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:42:33,607 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 8 states. [2020-12-23 06:42:33,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:33,703 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2020-12-23 06:42:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:42:33,703 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-23 06:42:33,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:33,704 INFO L225 Difference]: With dead ends: 114 [2020-12-23 06:42:33,705 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 06:42:33,705 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 [2020-12-23 06:42:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 06:42:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-12-23 06:42:33,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 06:42:33,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-12-23 06:42:33,714 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 22 [2020-12-23 06:42:33,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:33,715 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-12-23 06:42:33,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:42:33,715 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-12-23 06:42:33,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:42:33,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:33,716 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] [2020-12-23 06:42:33,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:42:33,930 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:33,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:33,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1926841972, now seen corresponding path program 1 times [2020-12-23 06:42:33,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:33,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119942013] [2020-12-23 06:42:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:42:34,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119942013] [2020-12-23 06:42:34,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402556083] [2020-12-23 06:42:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:42:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:42:34,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:42:34,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:42:34,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 06:42:34,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785488396] [2020-12-23 06:42:34,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:42:34,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:34,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:42:34,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:42:34,197 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 10 states. [2020-12-23 06:42:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:34,443 INFO L93 Difference]: Finished difference Result 181 states and 231 transitions. [2020-12-23 06:42:34,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:42:34,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-23 06:42:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:34,445 INFO L225 Difference]: With dead ends: 181 [2020-12-23 06:42:34,445 INFO L226 Difference]: Without dead ends: 159 [2020-12-23 06:42:34,446 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 [2020-12-23 06:42:34,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-23 06:42:34,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 75. [2020-12-23 06:42:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 06:42:34,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2020-12-23 06:42:34,458 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 22 [2020-12-23 06:42:34,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:34,459 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2020-12-23 06:42:34,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:42:34,459 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2020-12-23 06:42:34,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 06:42:34,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:34,460 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] [2020-12-23 06:42:34,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:42:34,675 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:34,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:34,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1234267636, now seen corresponding path program 1 times [2020-12-23 06:42:34,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:34,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661542001] [2020-12-23 06:42:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:42:34,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661542001] [2020-12-23 06:42:34,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435928037] [2020-12-23 06:42:34,741 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 [2020-12-23 06:42:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:34,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:42:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:42:34,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:42:34,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 06:42:34,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52837258] [2020-12-23 06:42:34,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:42:34,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:34,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:42:34,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:42:34,901 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand 10 states. [2020-12-23 06:42:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:35,096 INFO L93 Difference]: Finished difference Result 206 states and 263 transitions. [2020-12-23 06:42:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:42:35,096 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-23 06:42:35,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:35,100 INFO L225 Difference]: With dead ends: 206 [2020-12-23 06:42:35,100 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 06:42:35,101 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 [2020-12-23 06:42:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 06:42:35,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 92. [2020-12-23 06:42:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 06:42:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2020-12-23 06:42:35,126 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 23 [2020-12-23 06:42:35,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:35,127 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2020-12-23 06:42:35,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:42:35,127 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2020-12-23 06:42:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 06:42:35,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:35,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:42:35,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:42:35,342 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:35,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1741027445, now seen corresponding path program 1 times [2020-12-23 06:42:35,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:35,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139184394] [2020-12-23 06:42:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:42:35,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139184394] [2020-12-23 06:42:35,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193765717] [2020-12-23 06:42:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:42:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:35,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:42:35,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:35,937 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 [2020-12-23 06:42:35,939 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:42:35,955 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:42:35,958 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. [2020-12-23 06:42:35,959 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:32 [2020-12-23 06:42:36,025 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:42:36,026 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 [2020-12-23 06:42:36,029 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:42:36,057 INFO L625 ElimStorePlain]: treesize reduction 24, result has 57.1 percent of original size [2020-12-23 06:42:36,060 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. [2020-12-23 06:42:36,060 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:32 [2020-12-23 06:42:36,300 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:42:36,301 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 [2020-12-23 06:42:36,308 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:42:36,309 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-23 06:42:36,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:42:36,318 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:42:36,367 INFO L625 ElimStorePlain]: treesize reduction 51, result has 50.5 percent of original size [2020-12-23 06:42:36,371 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. [2020-12-23 06:42:36,371 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:54, output treesize:52 [2020-12-23 06:42:36,687 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:36,691 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:42:36,696 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 06:42:36,709 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:42:36,714 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 06:42:36,721 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 06:42:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:42:36,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:42:36,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-23 06:42:36,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802649124] [2020-12-23 06:42:36,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:42:36,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:36,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:42:36,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:42:36,756 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand 20 states. [2020-12-23 06:42:39,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:39,548 INFO L93 Difference]: Finished difference Result 252 states and 308 transitions. [2020-12-23 06:42:39,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:42:39,548 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2020-12-23 06:42:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:39,551 INFO L225 Difference]: With dead ends: 252 [2020-12-23 06:42:39,552 INFO L226 Difference]: Without dead ends: 230 [2020-12-23 06:42:39,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=622, Invalid=2240, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:42:39,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-23 06:42:39,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 96. [2020-12-23 06:42:39,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 06:42:39,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2020-12-23 06:42:39,569 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 25 [2020-12-23 06:42:39,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:39,569 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2020-12-23 06:42:39,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:42:39,569 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2020-12-23 06:42:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 06:42:39,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:39,571 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] [2020-12-23 06:42:39,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:42:39,784 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash -858936254, now seen corresponding path program 2 times [2020-12-23 06:42:39,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:39,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100906022] [2020-12-23 06:42:39,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 06:42:39,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100906022] [2020-12-23 06:42:39,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651453132] [2020-12-23 06:42:39,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:42:40,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:42:40,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:42:40,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:42:40,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:40,082 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 06:42:40,082 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:42:40,089 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:42:40,090 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:42:40,090 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 06:42:40,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:40,153 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 [2020-12-23 06:42:40,155 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:42:40,163 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:42:40,165 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:42:40,166 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:18 [2020-12-23 06:42:40,195 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:40,198 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 06:42:40,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:42:40,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-12-23 06:42:40,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717060950] [2020-12-23 06:42:40,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:42:40,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:40,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:42:40,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:42:40,215 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand 10 states. [2020-12-23 06:42:40,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:40,486 INFO L93 Difference]: Finished difference Result 159 states and 205 transitions. [2020-12-23 06:42:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:42:40,486 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-12-23 06:42:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:40,488 INFO L225 Difference]: With dead ends: 159 [2020-12-23 06:42:40,488 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 06:42:40,488 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 [2020-12-23 06:42:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 06:42:40,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 106. [2020-12-23 06:42:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 06:42:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2020-12-23 06:42:40,513 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 25 [2020-12-23 06:42:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:40,513 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2020-12-23 06:42:40,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:42:40,514 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2020-12-23 06:42:40,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:42:40,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:40,523 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] [2020-12-23 06:42:40,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:42:40,737 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:40,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:40,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1096380170, now seen corresponding path program 2 times [2020-12-23 06:42:40,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:40,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871404697] [2020-12-23 06:42:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:42:40,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871404697] [2020-12-23 06:42:40,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256196787] [2020-12-23 06:42:40,828 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 [2020-12-23 06:42:40,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:42:40,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:42:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:42:40,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:42:40,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:42:40,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 06:42:40,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850314363] [2020-12-23 06:42:41,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:42:41,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:41,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:42:41,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:42:41,001 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand 10 states. [2020-12-23 06:42:41,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:41,236 INFO L93 Difference]: Finished difference Result 216 states and 272 transitions. [2020-12-23 06:42:41,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:42:41,237 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-12-23 06:42:41,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:41,238 INFO L225 Difference]: With dead ends: 216 [2020-12-23 06:42:41,238 INFO L226 Difference]: Without dead ends: 203 [2020-12-23 06:42:41,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:42:41,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-23 06:42:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 148. [2020-12-23 06:42:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-23 06:42:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 196 transitions. [2020-12-23 06:42:41,263 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 196 transitions. Word has length 28 [2020-12-23 06:42:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:41,263 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 196 transitions. [2020-12-23 06:42:41,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:42:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 196 transitions. [2020-12-23 06:42:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 06:42:41,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:41,265 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] [2020-12-23 06:42:41,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:42:41,479 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:41,481 INFO L82 PathProgramCache]: Analyzing trace with hash 160714710, now seen corresponding path program 2 times [2020-12-23 06:42:41,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:41,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457286446] [2020-12-23 06:42:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 06:42:41,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457286446] [2020-12-23 06:42:41,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803564693] [2020-12-23 06:42:41,564 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 [2020-12-23 06:42:41,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:42:41,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:42:41,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:42:41,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 06:42:41,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:42:41,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-12-23 06:42:41,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533321861] [2020-12-23 06:42:41,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:42:41,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:41,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:42:41,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:42:41,725 INFO L87 Difference]: Start difference. First operand 148 states and 196 transitions. Second operand 4 states. [2020-12-23 06:42:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:41,791 INFO L93 Difference]: Finished difference Result 246 states and 322 transitions. [2020-12-23 06:42:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:42:41,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-12-23 06:42:41,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:41,796 INFO L225 Difference]: With dead ends: 246 [2020-12-23 06:42:41,796 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 06:42:41,801 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 [2020-12-23 06:42:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 06:42:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2020-12-23 06:42:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-23 06:42:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2020-12-23 06:42:41,816 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 29 [2020-12-23 06:42:41,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:41,816 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2020-12-23 06:42:41,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:42:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2020-12-23 06:42:41,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 06:42:41,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:41,817 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] [2020-12-23 06:42:42,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:42:42,031 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash 583416536, now seen corresponding path program 1 times [2020-12-23 06:42:42,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:42,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22772426] [2020-12-23 06:42:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 06:42:42,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22772426] [2020-12-23 06:42:42,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936826229] [2020-12-23 06:42:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:42:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:42,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:42:42,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:42,361 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-23 06:42:42,362 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:42:42,367 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:42:42,371 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:42:42,372 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-23 06:42:42,452 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:42,455 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:42,465 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 06:42:42,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:42:42,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 06:42:42,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988407152] [2020-12-23 06:42:42,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:42:42,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:42,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:42:42,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:42:42,484 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand 15 states. [2020-12-23 06:42:42,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:42,985 INFO L93 Difference]: Finished difference Result 183 states and 226 transitions. [2020-12-23 06:42:42,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:42:42,985 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-12-23 06:42:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:42,987 INFO L225 Difference]: With dead ends: 183 [2020-12-23 06:42:42,987 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 06:42:42,988 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 [2020-12-23 06:42:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 06:42:43,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-12-23 06:42:43,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 06:42:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2020-12-23 06:42:43,005 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 29 [2020-12-23 06:42:43,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:43,005 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2020-12-23 06:42:43,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:42:43,005 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2020-12-23 06:42:43,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:42:43,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:43,006 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] [2020-12-23 06:42:43,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:42:43,209 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:43,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:43,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1240772930, now seen corresponding path program 3 times [2020-12-23 06:42:43,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:43,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092681696] [2020-12-23 06:42:43,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:42:43,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092681696] [2020-12-23 06:42:43,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822704544] [2020-12-23 06:42:43,866 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 [2020-12-23 06:42:44,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:42:44,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:42:44,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:42:44,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:44,094 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 [2020-12-23 06:42:44,096 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:42:44,129 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:42:44,131 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. [2020-12-23 06:42:44,132 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:73 [2020-12-23 06:42:44,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,224 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:42:44,224 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 [2020-12-23 06:42:44,227 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:42:44,281 INFO L625 ElimStorePlain]: treesize reduction 20, result has 78.5 percent of original size [2020-12-23 06:42:44,283 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. [2020-12-23 06:42:44,283 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:81, output treesize:73 [2020-12-23 06:42:44,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,509 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:42:44,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:44,827 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-12-23 06:42:44,828 INFO L348 Elim1Store]: treesize reduction 16, result has 94.7 percent of original size [2020-12-23 06:42:44,829 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 [2020-12-23 06:42:44,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:44,840 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:42:44,927 INFO L625 ElimStorePlain]: treesize reduction 41, result has 68.5 percent of original size [2020-12-23 06:42:44,930 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. [2020-12-23 06:42:44,930 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:89 [2020-12-23 06:42:45,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:45,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:45,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:45,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:42:45,743 WARN L197 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 119 [2020-12-23 06:42:45,745 INFO L348 Elim1Store]: treesize reduction 14, result has 96.6 percent of original size [2020-12-23 06:42:45,745 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 [2020-12-23 06:42:45,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:42:45,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:42:45,762 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:42:45,768 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 06:42:45,769 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-12-23 06:42:45,770 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-23 06:42:45,771 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:42:45,772 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:42:45,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:45,775 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 06:42:45,777 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:42:45,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:45,788 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:42:45,907 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-12-23 06:42:45,908 INFO L625 ElimStorePlain]: treesize reduction 90, result has 54.5 percent of original size [2020-12-23 06:42:45,911 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:42:45,916 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 06:42:45,920 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. [2020-12-23 06:42:45,920 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:104, output treesize:108 [2020-12-23 06:42:45,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:42:45,924 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 06:42:46,381 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-23 06:42:46,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:42:46,408 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 06:42:47,339 WARN L197 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-12-23 06:42:47,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:48,094 WARN L197 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-12-23 06:42:49,209 WARN L197 SmtUtils]: Spent 921.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-12-23 06:42:49,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:50,118 WARN L197 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-12-23 06:42:50,134 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:50,504 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:42:50,507 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:42:50,511 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-23 06:42:50,520 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:42:50,523 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-23 06:42:50,527 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 14 disjuncts [2020-12-23 06:42:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:42:50,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:42:50,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2020-12-23 06:42:50,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201768094] [2020-12-23 06:42:50,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:42:50,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:50,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:42:50,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:42:50,618 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand 29 states. [2020-12-23 06:42:51,491 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-12-23 06:42:53,816 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2020-12-23 06:42:54,026 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-12-23 06:42:54,393 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2020-12-23 06:42:54,675 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 75 [2020-12-23 06:42:55,123 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2020-12-23 06:42:55,742 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 82 [2020-12-23 06:42:59,768 WARN L197 SmtUtils]: Spent 3.91 s on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2020-12-23 06:43:00,165 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 83 [2020-12-23 06:43:00,602 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-23 06:43:01,275 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-12-23 06:43:02,002 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 84 [2020-12-23 06:43:02,328 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2020-12-23 06:43:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:02,329 INFO L93 Difference]: Finished difference Result 186 states and 228 transitions. [2020-12-23 06:43:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:43:02,329 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-23 06:43:02,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:02,330 INFO L225 Difference]: With dead ends: 186 [2020-12-23 06:43:02,330 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 06:43:02,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=515, Invalid=2136, Unknown=1, NotChecked=0, Total=2652 [2020-12-23 06:43:02,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 06:43:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2020-12-23 06:43:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 06:43:02,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2020-12-23 06:43:02,348 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 31 [2020-12-23 06:43:02,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:02,348 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2020-12-23 06:43:02,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:43:02,349 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2020-12-23 06:43:02,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:43:02,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:02,349 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] [2020-12-23 06:43:02,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:02,563 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:02,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:02,564 INFO L82 PathProgramCache]: Analyzing trace with hash -956621735, now seen corresponding path program 1 times [2020-12-23 06:43:02,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:02,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798488609] [2020-12-23 06:43:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 06:43:02,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798488609] [2020-12-23 06:43:02,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:43:02,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:43:02,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96347671] [2020-12-23 06:43:02,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:43:02,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:43:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:43:02,610 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand 5 states. [2020-12-23 06:43:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:02,652 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2020-12-23 06:43:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:43:02,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-12-23 06:43:02,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:02,654 INFO L225 Difference]: With dead ends: 197 [2020-12-23 06:43:02,654 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 06:43:02,655 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 [2020-12-23 06:43:02,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 06:43:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2020-12-23 06:43:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 06:43:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 152 transitions. [2020-12-23 06:43:02,671 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 152 transitions. Word has length 31 [2020-12-23 06:43:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:02,671 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 152 transitions. [2020-12-23 06:43:02,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:43:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 152 transitions. [2020-12-23 06:43:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 06:43:02,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:02,672 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] [2020-12-23 06:43:02,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 06:43:02,673 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1777758610, now seen corresponding path program 2 times [2020-12-23 06:43:02,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:02,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459190286] [2020-12-23 06:43:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 06:43:02,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459190286] [2020-12-23 06:43:02,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312348328] [2020-12-23 06:43:02,760 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 [2020-12-23 06:43:02,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:43:02,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:02,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:43:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 06:43:02,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:02,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 06:43:02,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315415089] [2020-12-23 06:43:02,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:43:02,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:02,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:43:02,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:43:02,947 INFO L87 Difference]: Start difference. First operand 121 states and 152 transitions. Second operand 13 states. [2020-12-23 06:43:03,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:03,283 INFO L93 Difference]: Finished difference Result 403 states and 505 transitions. [2020-12-23 06:43:03,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:43:03,283 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-12-23 06:43:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:03,285 INFO L225 Difference]: With dead ends: 403 [2020-12-23 06:43:03,286 INFO L226 Difference]: Without dead ends: 298 [2020-12-23 06:43:03,286 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 [2020-12-23 06:43:03,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-12-23 06:43:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 204. [2020-12-23 06:43:03,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-23 06:43:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2020-12-23 06:43:03,311 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 33 [2020-12-23 06:43:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:03,311 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2020-12-23 06:43:03,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:43:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2020-12-23 06:43:03,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:43:03,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:03,312 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] [2020-12-23 06:43:03,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:43:03,517 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1071791489, now seen corresponding path program 4 times [2020-12-23 06:43:03,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:03,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779858628] [2020-12-23 06:43:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:43:03,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779858628] [2020-12-23 06:43:03,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859501881] [2020-12-23 06:43:03,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:03,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:43:03,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:03,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:43:03,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:43:03,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:03,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 06:43:03,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282370478] [2020-12-23 06:43:03,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:43:03,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:03,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:43:03,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:43:03,796 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand 13 states. [2020-12-23 06:43:04,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:04,162 INFO L93 Difference]: Finished difference Result 487 states and 611 transitions. [2020-12-23 06:43:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:43:04,163 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-12-23 06:43:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:04,166 INFO L225 Difference]: With dead ends: 487 [2020-12-23 06:43:04,166 INFO L226 Difference]: Without dead ends: 465 [2020-12-23 06:43:04,167 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 [2020-12-23 06:43:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-12-23 06:43:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 289. [2020-12-23 06:43:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-23 06:43:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 379 transitions. [2020-12-23 06:43:04,201 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 379 transitions. Word has length 34 [2020-12-23 06:43:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:04,201 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 379 transitions. [2020-12-23 06:43:04,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:43:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 379 transitions. [2020-12-23 06:43:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:43:04,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:04,202 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] [2020-12-23 06:43:04,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:43:04,417 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:04,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:04,418 INFO L82 PathProgramCache]: Analyzing trace with hash -715108188, now seen corresponding path program 2 times [2020-12-23 06:43:04,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:04,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302237915] [2020-12-23 06:43:04,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:43:05,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302237915] [2020-12-23 06:43:05,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600541527] [2020-12-23 06:43:05,028 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 [2020-12-23 06:43:05,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:43:05,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:05,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:43:05,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:05,138 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:05,139 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 [2020-12-23 06:43:05,141 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:05,158 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:05,159 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:05,159 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:32 [2020-12-23 06:43:05,320 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 [2020-12-23 06:43:05,321 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:05,340 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:05,341 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:05,341 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:46 [2020-12-23 06:43:05,553 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:05,553 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 [2020-12-23 06:43:05,557 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:43:05,557 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:05,560 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:05,632 INFO L625 ElimStorePlain]: treesize reduction 125, result has 35.2 percent of original size [2020-12-23 06:43:05,633 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:05,633 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:98, output treesize:68 [2020-12-23 06:43:05,814 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:05,814 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 [2020-12-23 06:43:05,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:05,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:05,830 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:05,831 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 06:43:05,833 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:05,869 INFO L625 ElimStorePlain]: treesize reduction 26, result has 51.9 percent of original size [2020-12-23 06:43:05,871 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:05,871 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:12 [2020-12-23 06:43:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:43:05,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:05,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-23 06:43:05,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162115624] [2020-12-23 06:43:05,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:43:05,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:05,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:43:05,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:43:05,920 INFO L87 Difference]: Start difference. First operand 289 states and 379 transitions. Second operand 24 states. [2020-12-23 06:43:07,751 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-23 06:43:11,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:11,309 INFO L93 Difference]: Finished difference Result 858 states and 1076 transitions. [2020-12-23 06:43:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 06:43:11,310 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2020-12-23 06:43:11,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:11,314 INFO L225 Difference]: With dead ends: 858 [2020-12-23 06:43:11,314 INFO L226 Difference]: Without dead ends: 771 [2020-12-23 06:43:11,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2267 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=970, Invalid=6170, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 06:43:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2020-12-23 06:43:11,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 414. [2020-12-23 06:43:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-12-23 06:43:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 558 transitions. [2020-12-23 06:43:11,376 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 558 transitions. Word has length 34 [2020-12-23 06:43:11,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:11,376 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 558 transitions. [2020-12-23 06:43:11,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:43:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 558 transitions. [2020-12-23 06:43:11,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 06:43:11,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:11,378 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] [2020-12-23 06:43:11,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:43:11,594 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:11,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1136182421, now seen corresponding path program 5 times [2020-12-23 06:43:11,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:11,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203016775] [2020-12-23 06:43:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:12,086 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2020-12-23 06:43:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 06:43:13,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203016775] [2020-12-23 06:43:13,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674752413] [2020-12-23 06:43:13,075 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 [2020-12-23 06:43:13,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 06:43:13,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:13,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:43:13,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:13,401 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:13,401 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 [2020-12-23 06:43:13,404 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:13,426 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:13,430 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:13,431 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:48 [2020-12-23 06:43:13,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:13,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:13,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:13,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:13,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:13,502 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 [2020-12-23 06:43:13,504 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:13,539 INFO L625 ElimStorePlain]: treesize reduction 4, result has 92.3 percent of original size [2020-12-23 06:43:13,541 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:13,542 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:48 [2020-12-23 06:43:13,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:13,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:13,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:13,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:13,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:13,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:13,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:13,734 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:43:13,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:14,039 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-12-23 06:43:14,040 INFO L348 Elim1Store]: treesize reduction 8, result has 96.6 percent of original size [2020-12-23 06:43:14,040 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 [2020-12-23 06:43:14,047 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:14,048 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:14,052 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:14,101 INFO L625 ElimStorePlain]: treesize reduction 15, result has 80.5 percent of original size [2020-12-23 06:43:14,102 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:43:14,102 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:62 [2020-12-23 06:43:14,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:14,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:14,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:14,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:14,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:14,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:14,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:14,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:14,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:14,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:14,352 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:43:14,353 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:43:14,731 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-12-23 06:43:14,733 INFO L348 Elim1Store]: treesize reduction 8, result has 97.6 percent of original size [2020-12-23 06:43:14,733 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 [2020-12-23 06:43:14,740 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:14,744 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:43:14,745 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:43:14,745 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:43:14,750 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:14,827 INFO L625 ElimStorePlain]: treesize reduction 67, result has 56.8 percent of original size [2020-12-23 06:43:14,829 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. [2020-12-23 06:43:14,829 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:88, output treesize:88 [2020-12-23 06:43:15,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:15,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:15,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:15,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:15,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:15,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:15,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:15,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:15,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:43:15,138 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:43:15,390 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-12-23 06:43:15,391 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:43:15,391 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 [2020-12-23 06:43:15,399 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-23 06:43:15,401 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:43:15,402 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-12-23 06:43:15,402 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:43:15,403 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:43:15,408 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:43:15,521 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-12-23 06:43:15,522 INFO L625 ElimStorePlain]: treesize reduction 117, result has 46.8 percent of original size [2020-12-23 06:43:15,524 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. [2020-12-23 06:43:15,524 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:105, output treesize:103 [2020-12-23 06:43:24,101 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 06:43:28,268 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 53 [2020-12-23 06:43:34,573 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:34,575 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:43:34,578 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:43:34,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2020-12-23 06:43:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 06:43:34,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:34,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2020-12-23 06:43:34,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898141589] [2020-12-23 06:43:34,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:43:34,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:34,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:43:34,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=917, Unknown=6, NotChecked=0, Total=1056 [2020-12-23 06:43:34,647 INFO L87 Difference]: Start difference. First operand 414 states and 558 transitions. Second operand 33 states. [2020-12-23 06:43:38,342 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-12-23 06:43:39,372 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-12-23 06:43:39,711 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2020-12-23 06:43:41,938 WARN L197 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-12-23 06:43:44,115 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-23 06:43:46,819 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-23 06:43:51,098 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-12-23 06:43:53,285 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-12-23 06:43:55,596 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-12-23 06:43:55,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:55,722 INFO L93 Difference]: Finished difference Result 476 states and 629 transitions. [2020-12-23 06:43:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:43:55,723 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-12-23 06:43:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:55,725 INFO L225 Difference]: With dead ends: 476 [2020-12-23 06:43:55,726 INFO L226 Difference]: Without dead ends: 438 [2020-12-23 06:43:55,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=500, Invalid=2464, Unknown=6, NotChecked=0, Total=2970 [2020-12-23 06:43:55,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-12-23 06:43:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 417. [2020-12-23 06:43:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-12-23 06:43:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 562 transitions. [2020-12-23 06:43:55,780 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 562 transitions. Word has length 37 [2020-12-23 06:43:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:55,781 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 562 transitions. [2020-12-23 06:43:55,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:43:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 562 transitions. [2020-12-23 06:43:55,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 06:43:55,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:55,782 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] [2020-12-23 06:43:55,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:55,992 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:55,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:55,993 INFO L82 PathProgramCache]: Analyzing trace with hash 301030412, now seen corresponding path program 1 times [2020-12-23 06:43:55,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:55,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732878468] [2020-12-23 06:43:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 06:43:56,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732878468] [2020-12-23 06:43:56,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997527597] [2020-12-23 06:43:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:56,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:43:56,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 06:43:56,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:56,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 06:43:56,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956620012] [2020-12-23 06:43:56,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:43:56,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:56,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:43:56,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:43:56,276 INFO L87 Difference]: Start difference. First operand 417 states and 562 transitions. Second operand 13 states. [2020-12-23 06:43:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:56,717 INFO L93 Difference]: Finished difference Result 583 states and 765 transitions. [2020-12-23 06:43:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:43:56,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-12-23 06:43:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:56,721 INFO L225 Difference]: With dead ends: 583 [2020-12-23 06:43:56,721 INFO L226 Difference]: Without dead ends: 561 [2020-12-23 06:43:56,722 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 [2020-12-23 06:43:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2020-12-23 06:43:56,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 416. [2020-12-23 06:43:56,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-12-23 06:43:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 556 transitions. [2020-12-23 06:43:56,775 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 556 transitions. Word has length 37 [2020-12-23 06:43:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:56,775 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 556 transitions. [2020-12-23 06:43:56,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:43:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 556 transitions. [2020-12-23 06:43:56,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:43:56,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:56,776 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:56,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:43:56,977 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:56,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:56,978 INFO L82 PathProgramCache]: Analyzing trace with hash 670016120, now seen corresponding path program 1 times [2020-12-23 06:43:56,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:56,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003523229] [2020-12-23 06:43:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:43:57,041 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:43:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:43:57,072 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:43:57,100 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:43:57,100 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:43:57,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 06:43:57,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:43:57 BoogieIcfgContainer [2020-12-23 06:43:57,162 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:43:57,163 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:43:57,163 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:43:57,163 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:43:57,163 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:42:31" (3/4) ... [2020-12-23 06:43:57,166 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 06:43:57,229 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/eureka_01-1.c-witness.graphml [2020-12-23 06:43:57,230 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:43:57,231 INFO L168 Benchmark]: Toolchain (without parser) took 86814.46 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 125.4 MB in the beginning and 282.2 MB in the end (delta: -156.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 8.0 GB. [2020-12-23 06:43:57,231 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:43:57,231 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.81 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 113.9 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:43:57,232 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.86 ms. Allocated memory is still 151.0 MB. Free memory was 113.9 MB in the beginning and 111.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:43:57,232 INFO L168 Benchmark]: Boogie Preprocessor took 40.59 ms. Allocated memory is still 151.0 MB. Free memory was 111.7 MB in the beginning and 109.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:43:57,232 INFO L168 Benchmark]: RCFGBuilder took 577.26 ms. Allocated memory is still 151.0 MB. Free memory was 109.9 MB in the beginning and 123.1 MB in the end (delta: -13.2 MB). Peak memory consumption was 15.3 MB. Max. memory is 8.0 GB. [2020-12-23 06:43:57,233 INFO L168 Benchmark]: TraceAbstraction took 85748.01 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 122.6 MB in the beginning and 286.4 MB in the end (delta: -163.8 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:43:57,233 INFO L168 Benchmark]: Witness Printer took 67.04 ms. Allocated memory is still 327.2 MB. Free memory was 286.4 MB in the beginning and 282.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-23 06:43:57,235 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 311.81 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 113.9 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 59.86 ms. Allocated memory is still 151.0 MB. Free memory was 113.9 MB in the beginning and 111.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.59 ms. Allocated memory is still 151.0 MB. Free memory was 111.7 MB in the beginning and 109.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 577.26 ms. Allocated memory is still 151.0 MB. Free memory was 109.9 MB in the beginning and 123.1 MB in the end (delta: -13.2 MB). Peak memory consumption was 15.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 85748.01 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 122.6 MB in the beginning and 286.4 MB in the end (delta: -163.8 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. * Witness Printer took 67.04 ms. Allocated memory is still 327.2 MB. Free memory was 286.4 MB in the beginning and 282.2 MB in the end (delta: 4.2 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: 85.6s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 44.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 623 SDtfs, 2529 SDslu, 3004 SDs, 0 SdLazy, 4189 SolverSat, 1196 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 10.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 768 GetRequests, 360 SyntacticMatches, 15 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4626 ImplicationChecksByTransitivity, 59.6s 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, 34.8s 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...