/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:31:02,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:31:02,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:31:02,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:31:02,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:31:02,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:31:02,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:31:02,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:31:02,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:31:02,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:31:02,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:31:02,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:31:02,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:31:02,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:31:02,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:31:02,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:31:02,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:31:02,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:31:02,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:31:02,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:31:02,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:31:02,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:31:02,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:31:02,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:31:02,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:31:02,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:31:02,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:31:02,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:31:02,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:31:02,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:31:02,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:31:02,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:31:02,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:31:02,407 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:31:02,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:31:02,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:31:02,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:31:02,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:31:02,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:31:02,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:31:02,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:31:02,409 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:31:02,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:31:02,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:31:02,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:31:02,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:31:02,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:31:02,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:31:02,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:31:02,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:31:02,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:31:02,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:31:02,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:31:02,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:31:02,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:31:02,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:31:02,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:31:02,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:31:02,816 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:31:02,817 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:31:02,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2021-01-06 10:31:02,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/80fcf2713/9e55f545f04240bda62c6827aa69d56c/FLAG17912c431 [2021-01-06 10:31:03,524 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:31:03,524 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2021-01-06 10:31:03,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/80fcf2713/9e55f545f04240bda62c6827aa69d56c/FLAG17912c431 [2021-01-06 10:31:03,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/80fcf2713/9e55f545f04240bda62c6827aa69d56c [2021-01-06 10:31:03,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:31:03,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:31:03,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:31:03,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:31:03,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:31:03,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:31:03" (1/1) ... [2021-01-06 10:31:03,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f27cdc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:03, skipping insertion in model container [2021-01-06 10:31:03,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:31:03" (1/1) ... [2021-01-06 10:31:03,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:31:03,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:31:04,122 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c[331,344] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:31:04,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:31:04,157 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:31:04,171 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c[331,344] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:31:04,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:31:04,200 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:31:04,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:04 WrapperNode [2021-01-06 10:31:04,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:31:04,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:31:04,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:31:04,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:31:04,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:04" (1/1) ... [2021-01-06 10:31:04,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:04" (1/1) ... [2021-01-06 10:31:04,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:31:04,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:31:04,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:31:04,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:31:04,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:04" (1/1) ... [2021-01-06 10:31:04,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:04" (1/1) ... [2021-01-06 10:31:04,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:04" (1/1) ... [2021-01-06 10:31:04,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:04" (1/1) ... [2021-01-06 10:31:04,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:04" (1/1) ... [2021-01-06 10:31:04,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:04" (1/1) ... [2021-01-06 10:31:04,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:04" (1/1) ... [2021-01-06 10:31:04,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:31:04,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:31:04,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:31:04,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:31:04,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:31:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:31:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:31:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:31:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:31:04,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:31:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:31:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:31:04,775 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:31:04,775 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 10:31:04,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:31:04 BoogieIcfgContainer [2021-01-06 10:31:04,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:31:04,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:31:04,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:31:04,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:31:04,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:31:03" (1/3) ... [2021-01-06 10:31:04,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d407123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:31:04, skipping insertion in model container [2021-01-06 10:31:04,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:04" (2/3) ... [2021-01-06 10:31:04,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d407123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:31:04, skipping insertion in model container [2021-01-06 10:31:04,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:31:04" (3/3) ... [2021-01-06 10:31:04,787 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_3.c [2021-01-06 10:31:04,795 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:31:04,801 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:31:04,826 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:31:04,857 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:31:04,857 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:31:04,858 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:31:04,858 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:31:04,858 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:31:04,858 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:31:04,858 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:31:04,859 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:31:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 10:31:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:31:04,882 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:04,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:04,884 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:04,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2021-01-06 10:31:04,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:04,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255117024] [2021-01-06 10:31:04,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:05,034 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:05,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876324106] [2021-01-06 10:31:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:05,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2021-01-06 10:31:05,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:31:05,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255117024] [2021-01-06 10:31:05,188 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:05,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876324106] [2021-01-06 10:31:05,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:31:05,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:31:05,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114196073] [2021-01-06 10:31:05,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:31:05,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:31:05,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:31:05,236 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 10:31:05,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:05,280 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-01-06 10:31:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:31:05,283 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 10:31:05,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:05,299 INFO L225 Difference]: With dead ends: 39 [2021-01-06 10:31:05,300 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 10:31:05,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:31:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 10:31:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 10:31:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:31:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-01-06 10:31:05,361 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-01-06 10:31:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:05,362 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-01-06 10:31:05,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:31:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-01-06 10:31:05,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:31:05,364 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:05,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:05,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 10:31:05,581 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:05,582 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2021-01-06 10:31:05,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:05,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259047118] [2021-01-06 10:31:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:05,610 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:05,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794080292] [2021-01-06 10:31:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:05,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:31:05,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:31:05,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259047118] [2021-01-06 10:31:05,818 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:05,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794080292] [2021-01-06 10:31:05,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:31:05,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:31:05,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518911293] [2021-01-06 10:31:05,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:31:05,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:05,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:31:05,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:31:05,827 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2021-01-06 10:31:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:05,923 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-01-06 10:31:05,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:31:05,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 10:31:05,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:05,925 INFO L225 Difference]: With dead ends: 42 [2021-01-06 10:31:05,925 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:31:05,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:31:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:31:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-01-06 10:31:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 10:31:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-01-06 10:31:05,932 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2021-01-06 10:31:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:05,933 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-01-06 10:31:05,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:31:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-01-06 10:31:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:31:05,934 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:05,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:06,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:06,150 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:06,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:06,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2021-01-06 10:31:06,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:06,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104235733] [2021-01-06 10:31:06,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:06,168 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:06,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014628256] [2021-01-06 10:31:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:06,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:31:06,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:31:06,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104235733] [2021-01-06 10:31:06,281 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:06,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014628256] [2021-01-06 10:31:06,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:06,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 10:31:06,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608711864] [2021-01-06 10:31:06,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:31:06,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:06,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:31:06,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:31:06,284 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2021-01-06 10:31:06,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:06,357 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-01-06 10:31:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:31:06,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 10:31:06,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:06,359 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:31:06,360 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:31:06,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:31:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:31:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2021-01-06 10:31:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:31:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-01-06 10:31:06,367 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2021-01-06 10:31:06,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:06,367 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-01-06 10:31:06,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:31:06,368 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-01-06 10:31:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:31:06,368 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:06,369 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:06,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:06,585 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:06,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:06,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2118808138, now seen corresponding path program 2 times [2021-01-06 10:31:06,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:06,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815891598] [2021-01-06 10:31:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:06,602 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:06,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019563012] [2021-01-06 10:31:06,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:06,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:31:06,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:06,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:31:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:31:06,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815891598] [2021-01-06 10:31:06,833 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:06,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019563012] [2021-01-06 10:31:06,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:31:06,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:31:06,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126961896] [2021-01-06 10:31:06,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:31:06,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:06,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:31:06,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:31:06,839 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2021-01-06 10:31:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:06,967 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-01-06 10:31:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:31:06,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2021-01-06 10:31:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:06,972 INFO L225 Difference]: With dead ends: 35 [2021-01-06 10:31:06,972 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:31:06,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:06,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:31:06,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-01-06 10:31:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:31:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-01-06 10:31:06,992 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2021-01-06 10:31:06,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:06,992 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-01-06 10:31:06,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:31:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-01-06 10:31:06,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:31:06,995 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:06,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:07,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:07,211 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:07,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2118867720, now seen corresponding path program 1 times [2021-01-06 10:31:07,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:07,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681260648] [2021-01-06 10:31:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:07,226 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:07,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763719812] [2021-01-06 10:31:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:07,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:31:07,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:31:07,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681260648] [2021-01-06 10:31:07,401 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:07,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763719812] [2021-01-06 10:31:07,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:07,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:31:07,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705529952] [2021-01-06 10:31:07,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:31:07,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:07,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:31:07,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:31:07,405 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2021-01-06 10:31:07,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:07,497 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2021-01-06 10:31:07,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:31:07,498 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 10:31:07,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:07,499 INFO L225 Difference]: With dead ends: 89 [2021-01-06 10:31:07,499 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:31:07,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:31:07,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:31:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2021-01-06 10:31:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:31:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-01-06 10:31:07,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2021-01-06 10:31:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:07,508 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-01-06 10:31:07,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:31:07,508 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-01-06 10:31:07,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:31:07,509 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:07,510 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:07,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:07,723 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:07,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1636705269, now seen corresponding path program 2 times [2021-01-06 10:31:07,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:07,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925096022] [2021-01-06 10:31:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:07,739 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:07,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293751523] [2021-01-06 10:31:07,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:07,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:31:07,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:07,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:31:07,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 10:31:07,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925096022] [2021-01-06 10:31:07,961 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:07,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293751523] [2021-01-06 10:31:07,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:31:07,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 10:31:07,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556236433] [2021-01-06 10:31:07,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:31:07,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:07,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:31:07,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:07,964 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 7 states. [2021-01-06 10:31:08,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:08,105 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 10:31:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:31:08,105 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-01-06 10:31:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:08,106 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:31:08,107 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 10:31:08,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:31:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 10:31:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2021-01-06 10:31:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:31:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-01-06 10:31:08,114 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2021-01-06 10:31:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:08,114 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-01-06 10:31:08,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:31:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-01-06 10:31:08,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:31:08,116 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:08,116 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:08,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:08,329 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:08,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:08,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1380764901, now seen corresponding path program 1 times [2021-01-06 10:31:08,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:08,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303963092] [2021-01-06 10:31:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:08,342 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:08,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533704005] [2021-01-06 10:31:08,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:08,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:31:08,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:31:08,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303963092] [2021-01-06 10:31:08,509 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:08,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533704005] [2021-01-06 10:31:08,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:08,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:31:08,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507438546] [2021-01-06 10:31:08,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:31:08,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:08,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:31:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:08,511 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2021-01-06 10:31:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:08,616 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2021-01-06 10:31:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:31:08,617 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-01-06 10:31:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:08,618 INFO L225 Difference]: With dead ends: 127 [2021-01-06 10:31:08,618 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:31:08,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:08,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:31:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 44. [2021-01-06 10:31:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:31:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-01-06 10:31:08,627 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2021-01-06 10:31:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:08,627 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-01-06 10:31:08,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:31:08,628 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-01-06 10:31:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 10:31:08,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:08,629 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:08,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:08,844 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:08,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1775597512, now seen corresponding path program 2 times [2021-01-06 10:31:08,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:08,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626250945] [2021-01-06 10:31:08,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:08,858 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:08,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530443041] [2021-01-06 10:31:08,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:08,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:31:08,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:08,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:31:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:31:09,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626250945] [2021-01-06 10:31:09,133 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:09,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530443041] [2021-01-06 10:31:09,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:09,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:31:09,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664395580] [2021-01-06 10:31:09,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:31:09,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:09,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:31:09,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:31:09,138 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2021-01-06 10:31:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:09,274 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2021-01-06 10:31:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:31:09,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2021-01-06 10:31:09,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:09,278 INFO L225 Difference]: With dead ends: 149 [2021-01-06 10:31:09,278 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 10:31:09,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:31:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 10:31:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 49. [2021-01-06 10:31:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 10:31:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-01-06 10:31:09,302 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 36 [2021-01-06 10:31:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:09,302 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-01-06 10:31:09,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:31:09,303 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-01-06 10:31:09,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:31:09,306 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:09,306 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:09,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 10:31:09,508 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash -599004987, now seen corresponding path program 3 times [2021-01-06 10:31:09,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:09,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241609756] [2021-01-06 10:31:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:09,524 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:09,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546424910] [2021-01-06 10:31:09,525 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:09,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:31:09,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:09,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:31:09,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 10:31:09,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241609756] [2021-01-06 10:31:09,936 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:09,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546424910] [2021-01-06 10:31:09,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:09,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:31:09,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415270944] [2021-01-06 10:31:09,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:31:09,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:09,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:31:09,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:31:09,939 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 8 states. [2021-01-06 10:31:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:10,090 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-01-06 10:31:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:31:10,090 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2021-01-06 10:31:10,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:10,091 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:31:10,091 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 10:31:10,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:31:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 10:31:10,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-01-06 10:31:10,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:31:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-01-06 10:31:10,099 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 41 [2021-01-06 10:31:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:10,099 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-01-06 10:31:10,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:31:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-01-06 10:31:10,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:31:10,100 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:10,101 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:10,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:10,316 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:10,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1681892459, now seen corresponding path program 4 times [2021-01-06 10:31:10,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:10,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981085899] [2021-01-06 10:31:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:10,327 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:10,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134095017] [2021-01-06 10:31:10,328 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:10,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:31:10,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:10,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:31:10,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:10,457 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 17 treesize of output 13 [2021-01-06 10:31:10,458 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:10,465 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:10,466 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:10,466 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:31:10,491 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-01-06 10:31:10,492 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:10,494 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:10,495 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:10,495 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-01-06 10:31:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-01-06 10:31:10,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981085899] [2021-01-06 10:31:10,524 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:10,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134095017] [2021-01-06 10:31:10,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:10,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:31:10,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545861989] [2021-01-06 10:31:10,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:31:10,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:10,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:31:10,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:31:10,527 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 6 states. [2021-01-06 10:31:10,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:10,595 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2021-01-06 10:31:10,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:31:10,596 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-01-06 10:31:10,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:10,597 INFO L225 Difference]: With dead ends: 116 [2021-01-06 10:31:10,597 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:31:10,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:31:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-01-06 10:31:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:31:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-01-06 10:31:10,604 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2021-01-06 10:31:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:10,604 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-01-06 10:31:10,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:31:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-01-06 10:31:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:31:10,605 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:10,605 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:10,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:10,820 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:10,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:10,822 INFO L82 PathProgramCache]: Analyzing trace with hash -562090839, now seen corresponding path program 1 times [2021-01-06 10:31:10,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:10,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730067577] [2021-01-06 10:31:10,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:10,831 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:10,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660263474] [2021-01-06 10:31:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:10,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:31:10,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:31:11,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730067577] [2021-01-06 10:31:11,066 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:11,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660263474] [2021-01-06 10:31:11,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:11,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:31:11,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354479761] [2021-01-06 10:31:11,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:31:11,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:11,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:31:11,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:31:11,068 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 9 states. [2021-01-06 10:31:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:11,207 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2021-01-06 10:31:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:31:11,209 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2021-01-06 10:31:11,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:11,210 INFO L225 Difference]: With dead ends: 197 [2021-01-06 10:31:11,210 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 10:31:11,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:31:11,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 10:31:11,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 59. [2021-01-06 10:31:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:31:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-01-06 10:31:11,219 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 46 [2021-01-06 10:31:11,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:11,219 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-01-06 10:31:11,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:31:11,219 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-01-06 10:31:11,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:31:11,220 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:11,220 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:11,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:31:11,436 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:11,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1943967942, now seen corresponding path program 2 times [2021-01-06 10:31:11,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:11,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377041325] [2021-01-06 10:31:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:11,446 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:11,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362843769] [2021-01-06 10:31:11,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:11,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:31:11,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:11,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:31:11,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:31:11,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377041325] [2021-01-06 10:31:11,703 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:11,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362843769] [2021-01-06 10:31:11,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:11,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:31:11,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698026506] [2021-01-06 10:31:11,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:31:11,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:11,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:31:11,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:31:11,705 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 10 states. [2021-01-06 10:31:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:11,860 INFO L93 Difference]: Finished difference Result 224 states and 268 transitions. [2021-01-06 10:31:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:31:11,861 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2021-01-06 10:31:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:11,863 INFO L225 Difference]: With dead ends: 224 [2021-01-06 10:31:11,863 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 10:31:11,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:31:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 10:31:11,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 64. [2021-01-06 10:31:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:31:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-01-06 10:31:11,870 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 51 [2021-01-06 10:31:11,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:11,871 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-01-06 10:31:11,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:31:11,871 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-01-06 10:31:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:31:11,872 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:11,872 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:12,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:12,086 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:12,086 INFO L82 PathProgramCache]: Analyzing trace with hash 71442249, now seen corresponding path program 3 times [2021-01-06 10:31:12,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:12,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517034170] [2021-01-06 10:31:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:12,095 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:12,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485585914] [2021-01-06 10:31:12,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:12,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:31:12,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:31:12,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:12,274 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 17 treesize of output 13 [2021-01-06 10:31:12,275 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:12,280 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:12,281 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:12,282 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:31:12,299 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-01-06 10:31:12,300 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:12,305 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:12,306 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:12,306 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2021-01-06 10:31:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-01-06 10:31:12,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517034170] [2021-01-06 10:31:12,357 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:12,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485585914] [2021-01-06 10:31:12,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:31:12,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 10:31:12,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259658415] [2021-01-06 10:31:12,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:31:12,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:12,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:31:12,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:12,359 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 7 states. [2021-01-06 10:31:12,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:12,531 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2021-01-06 10:31:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:31:12,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2021-01-06 10:31:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:12,534 INFO L225 Difference]: With dead ends: 136 [2021-01-06 10:31:12,534 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:31:12,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:31:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:31:12,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2021-01-06 10:31:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:31:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-01-06 10:31:12,542 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 56 [2021-01-06 10:31:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:12,542 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-01-06 10:31:12,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:31:12,542 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-01-06 10:31:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:31:12,543 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:12,543 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:12,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:31:12,757 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:12,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:12,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1617501493, now seen corresponding path program 4 times [2021-01-06 10:31:12,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:12,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208544442] [2021-01-06 10:31:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:12,769 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:12,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119968902] [2021-01-06 10:31:12,771 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:12,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:31:12,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:12,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:31:12,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:12,863 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 17 treesize of output 13 [2021-01-06 10:31:12,864 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:12,873 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:12,874 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:12,874 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:31:12,893 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 10:31:12,895 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:12,897 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:12,897 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:12,897 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-06 10:31:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:31:12,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208544442] [2021-01-06 10:31:12,931 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:12,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119968902] [2021-01-06 10:31:12,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:31:12,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:31:12,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256324343] [2021-01-06 10:31:12,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:31:12,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:12,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:31:12,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:31:12,933 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 5 states. [2021-01-06 10:31:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:12,982 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2021-01-06 10:31:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:31:12,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2021-01-06 10:31:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:12,984 INFO L225 Difference]: With dead ends: 132 [2021-01-06 10:31:12,985 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 10:31:12,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:31:12,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 10:31:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-01-06 10:31:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:31:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2021-01-06 10:31:12,995 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 56 [2021-01-06 10:31:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:12,995 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2021-01-06 10:31:12,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:31:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2021-01-06 10:31:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:31:12,996 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:12,996 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:13,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:13,210 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:13,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1633020211, now seen corresponding path program 5 times [2021-01-06 10:31:13,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:13,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501964490] [2021-01-06 10:31:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:13,220 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:13,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580670650] [2021-01-06 10:31:13,221 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:13,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 10:31:13,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:13,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:31:13,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:13,287 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 17 treesize of output 13 [2021-01-06 10:31:13,288 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:13,290 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:13,291 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:13,291 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2021-01-06 10:31:13,377 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:13,377 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 71 [2021-01-06 10:31:13,382 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:13,409 INFO L625 ElimStorePlain]: treesize reduction 30, result has 55.2 percent of original size [2021-01-06 10:31:13,411 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:31:13,411 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:37 [2021-01-06 10:31:13,466 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:13,467 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2021-01-06 10:31:13,469 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:13,487 INFO L625 ElimStorePlain]: treesize reduction 12, result has 57.1 percent of original size [2021-01-06 10:31:13,489 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:13,489 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:3 [2021-01-06 10:31:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-01-06 10:31:13,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501964490] [2021-01-06 10:31:13,522 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:13,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580670650] [2021-01-06 10:31:13,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:13,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:31:13,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479886034] [2021-01-06 10:31:13,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:31:13,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:13,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:31:13,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:31:13,524 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 8 states. [2021-01-06 10:31:13,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:13,662 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2021-01-06 10:31:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:31:13,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2021-01-06 10:31:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:13,663 INFO L225 Difference]: With dead ends: 140 [2021-01-06 10:31:13,663 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 10:31:13,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:31:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 10:31:13,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2021-01-06 10:31:13,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 10:31:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-01-06 10:31:13,672 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 56 [2021-01-06 10:31:13,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:13,672 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-01-06 10:31:13,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:31:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-01-06 10:31:13,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:31:13,673 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:13,673 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:13,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:31:13,889 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:13,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1670153675, now seen corresponding path program 6 times [2021-01-06 10:31:13,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:13,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692755273] [2021-01-06 10:31:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:13,900 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:13,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811015534] [2021-01-06 10:31:13,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:14,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:31:14,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:14,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 10:31:14,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-01-06 10:31:14,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692755273] [2021-01-06 10:31:14,410 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:14,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811015534] [2021-01-06 10:31:14,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:14,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:31:14,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852842141] [2021-01-06 10:31:14,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:31:14,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:14,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:31:14,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:31:14,412 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 10 states. [2021-01-06 10:31:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:14,640 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2021-01-06 10:31:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:31:14,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2021-01-06 10:31:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:14,641 INFO L225 Difference]: With dead ends: 103 [2021-01-06 10:31:14,641 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 10:31:14,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:31:14,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 10:31:14,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-01-06 10:31:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:31:14,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2021-01-06 10:31:14,650 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 56 [2021-01-06 10:31:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:14,650 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2021-01-06 10:31:14,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:31:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2021-01-06 10:31:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:31:14,651 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:14,651 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:14,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:31:14,867 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:14,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:14,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1477851941, now seen corresponding path program 7 times [2021-01-06 10:31:14,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:14,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333507305] [2021-01-06 10:31:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:14,877 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:14,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798064103] [2021-01-06 10:31:14,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:14,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:31:14,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:31:15,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333507305] [2021-01-06 10:31:15,108 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:15,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798064103] [2021-01-06 10:31:15,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:15,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:31:15,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988146918] [2021-01-06 10:31:15,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:31:15,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:15,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:31:15,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:31:15,111 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 11 states. [2021-01-06 10:31:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:15,297 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2021-01-06 10:31:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:31:15,298 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2021-01-06 10:31:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:15,299 INFO L225 Difference]: With dead ends: 336 [2021-01-06 10:31:15,300 INFO L226 Difference]: Without dead ends: 291 [2021-01-06 10:31:15,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:31:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-01-06 10:31:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 106. [2021-01-06 10:31:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 10:31:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2021-01-06 10:31:15,310 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 61 [2021-01-06 10:31:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:15,310 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2021-01-06 10:31:15,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:31:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2021-01-06 10:31:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 10:31:15,311 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:15,311 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:15,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:31:15,521 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:15,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:15,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1255875722, now seen corresponding path program 8 times [2021-01-06 10:31:15,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:15,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577534584] [2021-01-06 10:31:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:15,531 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:15,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835644717] [2021-01-06 10:31:15,531 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:15,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:31:15,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:15,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:31:15,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:31:15,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577534584] [2021-01-06 10:31:15,889 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:15,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835644717] [2021-01-06 10:31:15,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:15,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:31:15,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308093667] [2021-01-06 10:31:15,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:31:15,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:15,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:31:15,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:31:15,891 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 12 states. [2021-01-06 10:31:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:16,093 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2021-01-06 10:31:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:31:16,093 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2021-01-06 10:31:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:16,095 INFO L225 Difference]: With dead ends: 373 [2021-01-06 10:31:16,096 INFO L226 Difference]: Without dead ends: 328 [2021-01-06 10:31:16,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:31:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-01-06 10:31:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 116. [2021-01-06 10:31:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 10:31:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2021-01-06 10:31:16,108 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 66 [2021-01-06 10:31:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:16,108 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2021-01-06 10:31:16,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:31:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2021-01-06 10:31:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:31:16,110 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:16,110 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:16,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:31:16,324 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:16,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:16,325 INFO L82 PathProgramCache]: Analyzing trace with hash -495794747, now seen corresponding path program 9 times [2021-01-06 10:31:16,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:16,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46908672] [2021-01-06 10:31:16,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:16,334 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:16,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098609782] [2021-01-06 10:31:16,334 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:16,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:31:16,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:16,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:31:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-01-06 10:31:16,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46908672] [2021-01-06 10:31:16,697 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:16,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098609782] [2021-01-06 10:31:16,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:16,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:31:16,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692531641] [2021-01-06 10:31:16,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:31:16,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:16,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:31:16,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:31:16,704 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 9 states. [2021-01-06 10:31:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:17,003 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-01-06 10:31:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:31:17,004 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2021-01-06 10:31:17,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:17,005 INFO L225 Difference]: With dead ends: 128 [2021-01-06 10:31:17,005 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 10:31:17,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:31:17,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 10:31:17,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2021-01-06 10:31:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 10:31:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2021-01-06 10:31:17,018 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 71 [2021-01-06 10:31:17,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:17,019 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2021-01-06 10:31:17,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:31:17,019 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2021-01-06 10:31:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 10:31:17,020 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:17,020 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:17,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:17,224 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:17,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:17,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1692067691, now seen corresponding path program 10 times [2021-01-06 10:31:17,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:17,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242850072] [2021-01-06 10:31:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:17,234 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:17,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308911688] [2021-01-06 10:31:17,235 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:17,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:31:17,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:17,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:31:17,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:17,347 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 17 treesize of output 13 [2021-01-06 10:31:17,348 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:17,353 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:17,353 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:17,354 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:31:17,375 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-01-06 10:31:17,376 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:17,381 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:17,382 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:17,382 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2021-01-06 10:31:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:31:17,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242850072] [2021-01-06 10:31:17,428 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:17,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308911688] [2021-01-06 10:31:17,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:17,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:31:17,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443652988] [2021-01-06 10:31:17,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:31:17,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:17,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:31:17,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:17,430 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 7 states. [2021-01-06 10:31:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:17,521 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2021-01-06 10:31:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:31:17,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2021-01-06 10:31:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:17,522 INFO L225 Difference]: With dead ends: 176 [2021-01-06 10:31:17,522 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:31:17,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:31:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:31:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2021-01-06 10:31:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 10:31:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-01-06 10:31:17,530 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 76 [2021-01-06 10:31:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:17,530 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-01-06 10:31:17,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:31:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-01-06 10:31:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 10:31:17,531 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:17,532 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:17,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:17,745 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:17,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:17,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2042199827, now seen corresponding path program 1 times [2021-01-06 10:31:17,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:17,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729481757] [2021-01-06 10:31:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:17,754 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:17,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655460511] [2021-01-06 10:31:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:17,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:31:17,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:31:18,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729481757] [2021-01-06 10:31:18,061 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:18,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655460511] [2021-01-06 10:31:18,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:18,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:31:18,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239682621] [2021-01-06 10:31:18,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:31:18,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:18,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:31:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:31:18,064 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 13 states. [2021-01-06 10:31:18,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:18,271 INFO L93 Difference]: Finished difference Result 386 states and 451 transitions. [2021-01-06 10:31:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:31:18,272 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2021-01-06 10:31:18,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:18,274 INFO L225 Difference]: With dead ends: 386 [2021-01-06 10:31:18,274 INFO L226 Difference]: Without dead ends: 346 [2021-01-06 10:31:18,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:31:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-01-06 10:31:18,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 91. [2021-01-06 10:31:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 10:31:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-01-06 10:31:18,284 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 76 [2021-01-06 10:31:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:18,284 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-01-06 10:31:18,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:31:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-01-06 10:31:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 10:31:18,285 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:18,285 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:18,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:31:18,501 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:18,502 INFO L82 PathProgramCache]: Analyzing trace with hash 279020216, now seen corresponding path program 2 times [2021-01-06 10:31:18,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:18,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656927484] [2021-01-06 10:31:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:18,509 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:18,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161237060] [2021-01-06 10:31:18,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:18,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:31:18,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:18,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:31:18,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:31:18,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656927484] [2021-01-06 10:31:18,929 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:18,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161237060] [2021-01-06 10:31:18,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:18,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:31:18,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031876168] [2021-01-06 10:31:18,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:31:18,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:18,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:31:18,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:31:18,931 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 14 states. [2021-01-06 10:31:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:19,155 INFO L93 Difference]: Finished difference Result 423 states and 494 transitions. [2021-01-06 10:31:19,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:31:19,158 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2021-01-06 10:31:19,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:19,160 INFO L225 Difference]: With dead ends: 423 [2021-01-06 10:31:19,161 INFO L226 Difference]: Without dead ends: 383 [2021-01-06 10:31:19,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:31:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-01-06 10:31:19,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 96. [2021-01-06 10:31:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:31:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-01-06 10:31:19,170 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 81 [2021-01-06 10:31:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:19,170 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-01-06 10:31:19,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:31:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-01-06 10:31:19,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:31:19,171 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:19,171 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:19,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:19,388 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:19,389 INFO L82 PathProgramCache]: Analyzing trace with hash -697899059, now seen corresponding path program 3 times [2021-01-06 10:31:19,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:19,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179558577] [2021-01-06 10:31:19,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:19,405 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:19,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179512548] [2021-01-06 10:31:19,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:19,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:31:19,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:19,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:31:19,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:35,973 WARN L197 SmtUtils]: Spent 16.42 s on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 10:31:38,074 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 18 [2021-01-06 10:31:38,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:31:38,377 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:31:38,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:31:38,387 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:31:40,455 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 17 [2021-01-06 10:31:42,539 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2021-01-06 10:31:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-01-06 10:31:42,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179558577] [2021-01-06 10:31:42,627 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:42,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179512548] [2021-01-06 10:31:42,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:42,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:31:42,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976632765] [2021-01-06 10:31:42,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:31:42,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:42,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:31:42,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:42,629 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 7 states. [2021-01-06 10:31:51,209 WARN L197 SmtUtils]: Spent 8.50 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-01-06 10:31:59,551 WARN L197 SmtUtils]: Spent 8.31 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-01-06 10:32:08,135 WARN L197 SmtUtils]: Spent 8.49 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-01-06 10:32:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:14,585 INFO L93 Difference]: Finished difference Result 197 states and 227 transitions. [2021-01-06 10:32:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:32:14,587 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2021-01-06 10:32:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:14,589 INFO L225 Difference]: With dead ends: 197 [2021-01-06 10:32:14,589 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 10:32:14,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:32:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 10:32:14,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 105. [2021-01-06 10:32:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 10:32:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-01-06 10:32:14,602 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 86 [2021-01-06 10:32:14,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:14,602 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-01-06 10:32:14,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:32:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-01-06 10:32:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:32:14,603 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:14,603 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:14,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:32:14,819 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:14,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:14,820 INFO L82 PathProgramCache]: Analyzing trace with hash -459469228, now seen corresponding path program 1 times [2021-01-06 10:32:14,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:14,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941624270] [2021-01-06 10:32:14,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:14,828 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:14,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931246543] [2021-01-06 10:32:14,829 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:14,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:32:14,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:32:15,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941624270] [2021-01-06 10:32:15,340 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:15,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931246543] [2021-01-06 10:32:15,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:15,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 10:32:15,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674623467] [2021-01-06 10:32:15,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:32:15,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:15,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:32:15,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:32:15,342 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 16 states. [2021-01-06 10:32:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:15,790 INFO L93 Difference]: Finished difference Result 515 states and 604 transitions. [2021-01-06 10:32:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:32:15,791 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2021-01-06 10:32:15,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:15,794 INFO L225 Difference]: With dead ends: 515 [2021-01-06 10:32:15,794 INFO L226 Difference]: Without dead ends: 466 [2021-01-06 10:32:15,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:32:15,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-01-06 10:32:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 115. [2021-01-06 10:32:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 10:32:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-01-06 10:32:15,808 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 91 [2021-01-06 10:32:15,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:15,808 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-01-06 10:32:15,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:32:15,808 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-01-06 10:32:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:32:15,809 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:15,809 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:16,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:16,024 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:16,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:16,025 INFO L82 PathProgramCache]: Analyzing trace with hash -830076044, now seen corresponding path program 2 times [2021-01-06 10:32:16,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:16,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813669585] [2021-01-06 10:32:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:16,034 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:16,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829775773] [2021-01-06 10:32:16,034 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:16,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:32:16,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:16,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:32:16,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:32:16,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813669585] [2021-01-06 10:32:16,754 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:16,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829775773] [2021-01-06 10:32:16,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:16,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 10:32:16,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064692338] [2021-01-06 10:32:16,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:32:16,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:16,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:32:16,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:32:16,755 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 18 states. [2021-01-06 10:32:17,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:17,247 INFO L93 Difference]: Finished difference Result 589 states and 690 transitions. [2021-01-06 10:32:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:32:17,248 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2021-01-06 10:32:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:17,251 INFO L225 Difference]: With dead ends: 589 [2021-01-06 10:32:17,251 INFO L226 Difference]: Without dead ends: 540 [2021-01-06 10:32:17,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:32:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-01-06 10:32:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 125. [2021-01-06 10:32:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 10:32:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2021-01-06 10:32:17,265 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 101 [2021-01-06 10:32:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:17,265 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2021-01-06 10:32:17,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:32:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2021-01-06 10:32:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 10:32:17,266 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:17,267 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:17,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:32:17,470 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:17,471 INFO L82 PathProgramCache]: Analyzing trace with hash 397222036, now seen corresponding path program 3 times [2021-01-06 10:32:17,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:17,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254629927] [2021-01-06 10:32:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:17,478 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:17,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625033750] [2021-01-06 10:32:17,478 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:17,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:32:17,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:17,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:32:17,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:17,732 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:32:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 129 proven. 4 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 10:32:17,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254629927] [2021-01-06 10:32:17,845 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:17,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625033750] [2021-01-06 10:32:17,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:17,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:32:17,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911457846] [2021-01-06 10:32:17,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:32:17,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:17,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:32:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:32:17,847 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 7 states. [2021-01-06 10:32:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:18,114 INFO L93 Difference]: Finished difference Result 206 states and 238 transitions. [2021-01-06 10:32:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:32:18,115 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 111 [2021-01-06 10:32:18,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:18,117 INFO L225 Difference]: With dead ends: 206 [2021-01-06 10:32:18,117 INFO L226 Difference]: Without dead ends: 173 [2021-01-06 10:32:18,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:32:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-01-06 10:32:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 137. [2021-01-06 10:32:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 10:32:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 154 transitions. [2021-01-06 10:32:18,129 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 154 transitions. Word has length 111 [2021-01-06 10:32:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:18,130 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 154 transitions. [2021-01-06 10:32:18,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:32:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 154 transitions. [2021-01-06 10:32:18,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-01-06 10:32:18,131 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:18,131 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:18,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:32:18,346 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:18,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:18,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1645099501, now seen corresponding path program 4 times [2021-01-06 10:32:18,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:18,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604050622] [2021-01-06 10:32:18,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:18,355 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:18,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402137271] [2021-01-06 10:32:18,355 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:18,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:32:18,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:18,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:32:18,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:32:19,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604050622] [2021-01-06 10:32:19,205 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:19,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402137271] [2021-01-06 10:32:19,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:19,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-01-06 10:32:19,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148005045] [2021-01-06 10:32:19,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:32:19,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:19,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:32:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:32:19,207 INFO L87 Difference]: Start difference. First operand 137 states and 154 transitions. Second operand 21 states. [2021-01-06 10:32:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:19,753 INFO L93 Difference]: Finished difference Result 724 states and 854 transitions. [2021-01-06 10:32:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:32:19,754 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 116 [2021-01-06 10:32:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:19,757 INFO L225 Difference]: With dead ends: 724 [2021-01-06 10:32:19,757 INFO L226 Difference]: Without dead ends: 663 [2021-01-06 10:32:19,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:32:19,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-01-06 10:32:19,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 152. [2021-01-06 10:32:19,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 10:32:19,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2021-01-06 10:32:19,775 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 116 [2021-01-06 10:32:19,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:19,775 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2021-01-06 10:32:19,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:32:19,775 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2021-01-06 10:32:19,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-01-06 10:32:19,776 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:19,776 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:19,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:32:19,991 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:19,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1484809768, now seen corresponding path program 5 times [2021-01-06 10:32:19,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:19,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428752705] [2021-01-06 10:32:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:19,999 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:19,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702962623] [2021-01-06 10:32:19,999 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:21,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-01-06 10:32:21,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:21,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:32:21,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:32:22,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428752705] [2021-01-06 10:32:22,118 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:22,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702962623] [2021-01-06 10:32:22,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:22,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 10:32:22,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647001344] [2021-01-06 10:32:22,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:32:22,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:22,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:32:22,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:32:22,120 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand 24 states. [2021-01-06 10:32:22,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:22,799 INFO L93 Difference]: Finished difference Result 835 states and 983 transitions. [2021-01-06 10:32:22,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:32:22,801 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 131 [2021-01-06 10:32:22,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:22,804 INFO L225 Difference]: With dead ends: 835 [2021-01-06 10:32:22,804 INFO L226 Difference]: Without dead ends: 774 [2021-01-06 10:32:22,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:32:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-01-06 10:32:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 167. [2021-01-06 10:32:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 10:32:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 184 transitions. [2021-01-06 10:32:22,824 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 184 transitions. Word has length 131 [2021-01-06 10:32:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:22,824 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 184 transitions. [2021-01-06 10:32:22,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:32:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 184 transitions. [2021-01-06 10:32:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-01-06 10:32:22,825 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:22,825 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 21, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:23,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:32:23,032 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:23,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:23,033 INFO L82 PathProgramCache]: Analyzing trace with hash -466942323, now seen corresponding path program 6 times [2021-01-06 10:32:23,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:23,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569652534] [2021-01-06 10:32:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:23,045 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:23,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107769627] [2021-01-06 10:32:23,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:23,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:32:23,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:23,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:32:23,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:23,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-01-06 10:32:23,596 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:23,618 INFO L625 ElimStorePlain]: treesize reduction 9, result has 73.5 percent of original size [2021-01-06 10:32:23,627 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 21 treesize of output 17 [2021-01-06 10:32:23,629 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:23,640 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:23,641 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:23,641 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-01-06 10:32:23,670 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-01-06 10:32:23,672 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:23,682 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:23,682 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:23,683 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-01-06 10:32:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1138 trivial. 0 not checked. [2021-01-06 10:32:24,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569652534] [2021-01-06 10:32:24,048 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:24,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107769627] [2021-01-06 10:32:24,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:24,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:32:24,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110552470] [2021-01-06 10:32:24,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:32:24,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:24,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:32:24,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:32:24,050 INFO L87 Difference]: Start difference. First operand 167 states and 184 transitions. Second operand 10 states. [2021-01-06 10:32:37,356 WARN L197 SmtUtils]: Spent 11.00 s on a formula simplification that was a NOOP. DAG size: 21 [2021-01-06 10:32:46,996 WARN L197 SmtUtils]: Spent 2.31 s on a formula simplification that was a NOOP. DAG size: 29 [2021-01-06 10:32:49,349 WARN L197 SmtUtils]: Spent 2.33 s on a formula simplification that was a NOOP. DAG size: 31 [2021-01-06 10:32:59,338 WARN L197 SmtUtils]: Spent 7.47 s on a formula simplification that was a NOOP. DAG size: 30 [2021-01-06 10:33:14,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:14,983 INFO L93 Difference]: Finished difference Result 220 states and 250 transitions. [2021-01-06 10:33:14,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:33:14,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 146 [2021-01-06 10:33:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:14,986 INFO L225 Difference]: With dead ends: 220 [2021-01-06 10:33:14,986 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 10:33:14,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=118, Invalid=260, Unknown=2, NotChecked=0, Total=380 [2021-01-06 10:33:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 10:33:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 176. [2021-01-06 10:33:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 10:33:15,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 195 transitions. [2021-01-06 10:33:15,003 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 195 transitions. Word has length 146 [2021-01-06 10:33:15,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:15,003 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 195 transitions. [2021-01-06 10:33:15,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:33:15,003 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 195 transitions. [2021-01-06 10:33:15,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-01-06 10:33:15,004 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:15,004 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 21, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:15,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:33:15,209 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:15,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1584041675, now seen corresponding path program 7 times [2021-01-06 10:33:15,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:15,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329651581] [2021-01-06 10:33:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:15,217 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:15,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473833199] [2021-01-06 10:33:15,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:15,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:33:15,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:16,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329651581] [2021-01-06 10:33:16,563 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:16,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473833199] [2021-01-06 10:33:16,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:16,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-01-06 10:33:16,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497730641] [2021-01-06 10:33:16,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:33:16,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:16,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:33:16,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:33:16,565 INFO L87 Difference]: Start difference. First operand 176 states and 195 transitions. Second operand 27 states. [2021-01-06 10:33:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:17,567 INFO L93 Difference]: Finished difference Result 964 states and 1134 transitions. [2021-01-06 10:33:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:33:17,568 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 146 [2021-01-06 10:33:17,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:17,573 INFO L225 Difference]: With dead ends: 964 [2021-01-06 10:33:17,573 INFO L226 Difference]: Without dead ends: 894 [2021-01-06 10:33:17,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:33:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-01-06 10:33:17,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 191. [2021-01-06 10:33:17,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-01-06 10:33:17,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2021-01-06 10:33:17,597 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 146 [2021-01-06 10:33:17,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:17,598 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2021-01-06 10:33:17,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:33:17,598 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2021-01-06 10:33:17,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 10:33:17,599 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:17,599 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 24, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:17,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:17,812 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:17,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:17,813 INFO L82 PathProgramCache]: Analyzing trace with hash -602177162, now seen corresponding path program 8 times [2021-01-06 10:33:17,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:17,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340228955] [2021-01-06 10:33:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:17,821 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:17,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317515786] [2021-01-06 10:33:17,822 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:17,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:33:17,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:17,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:33:17,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1697 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:19,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340228955] [2021-01-06 10:33:19,389 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:19,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317515786] [2021-01-06 10:33:19,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:19,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-01-06 10:33:19,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526818374] [2021-01-06 10:33:19,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:33:19,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:33:19,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:33:19,391 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand 30 states. [2021-01-06 10:33:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:20,401 INFO L93 Difference]: Finished difference Result 1075 states and 1263 transitions. [2021-01-06 10:33:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:33:20,403 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 161 [2021-01-06 10:33:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:20,407 INFO L225 Difference]: With dead ends: 1075 [2021-01-06 10:33:20,407 INFO L226 Difference]: Without dead ends: 1005 [2021-01-06 10:33:20,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:33:20,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-01-06 10:33:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 206. [2021-01-06 10:33:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2021-01-06 10:33:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 225 transitions. [2021-01-06 10:33:20,430 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 225 transitions. Word has length 161 [2021-01-06 10:33:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:20,431 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 225 transitions. [2021-01-06 10:33:20,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 10:33:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 225 transitions. [2021-01-06 10:33:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-01-06 10:33:20,432 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:20,432 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 27, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:20,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:20,646 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:20,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:20,647 INFO L82 PathProgramCache]: Analyzing trace with hash -661159061, now seen corresponding path program 9 times [2021-01-06 10:33:20,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:20,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107974061] [2021-01-06 10:33:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:20,661 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:20,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441631513] [2021-01-06 10:33:20,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:20,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:33:20,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:20,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:33:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:21,087 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:33:21,128 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:33:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2105 backedges. 369 proven. 13 refuted. 0 times theorem prover too weak. 1723 trivial. 0 not checked. [2021-01-06 10:33:21,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107974061] [2021-01-06 10:33:21,293 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:21,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441631513] [2021-01-06 10:33:21,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:21,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:33:21,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457053067] [2021-01-06 10:33:21,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:33:21,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:21,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:33:21,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:33:21,295 INFO L87 Difference]: Start difference. First operand 206 states and 225 transitions. Second operand 8 states. [2021-01-06 10:33:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:21,742 INFO L93 Difference]: Finished difference Result 327 states and 374 transitions. [2021-01-06 10:33:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:33:21,743 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 176 [2021-01-06 10:33:21,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:21,749 INFO L225 Difference]: With dead ends: 327 [2021-01-06 10:33:21,749 INFO L226 Difference]: Without dead ends: 294 [2021-01-06 10:33:21,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:33:21,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-01-06 10:33:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 216. [2021-01-06 10:33:21,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2021-01-06 10:33:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 239 transitions. [2021-01-06 10:33:21,771 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 239 transitions. Word has length 176 [2021-01-06 10:33:21,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:21,771 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 239 transitions. [2021-01-06 10:33:21,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:33:21,771 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 239 transitions. [2021-01-06 10:33:21,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 10:33:21,772 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:21,772 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 28, 27, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:21,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 10:33:21,978 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:21,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:21,978 INFO L82 PathProgramCache]: Analyzing trace with hash 896573234, now seen corresponding path program 10 times [2021-01-06 10:33:21,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:21,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143615334] [2021-01-06 10:33:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:21,987 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:21,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690907067] [2021-01-06 10:33:21,988 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:22,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:33:22,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:22,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:33:22,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:24,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143615334] [2021-01-06 10:33:24,540 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:24,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690907067] [2021-01-06 10:33:24,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:24,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-01-06 10:33:24,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846888032] [2021-01-06 10:33:24,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:33:24,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:24,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:33:24,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:33:24,542 INFO L87 Difference]: Start difference. First operand 216 states and 239 transitions. Second operand 34 states. [2021-01-06 10:33:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:25,782 INFO L93 Difference]: Finished difference Result 1243 states and 1464 transitions. [2021-01-06 10:33:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:33:25,784 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 181 [2021-01-06 10:33:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:25,789 INFO L225 Difference]: With dead ends: 1243 [2021-01-06 10:33:25,789 INFO L226 Difference]: Without dead ends: 1163 [2021-01-06 10:33:25,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:33:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-01-06 10:33:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 236. [2021-01-06 10:33:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2021-01-06 10:33:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 259 transitions. [2021-01-06 10:33:25,817 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 259 transitions. Word has length 181 [2021-01-06 10:33:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:25,818 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 259 transitions. [2021-01-06 10:33:25,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:33:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 259 transitions. [2021-01-06 10:33:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-01-06 10:33:25,819 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:25,819 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 32, 31, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:26,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:26,035 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:26,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1128242830, now seen corresponding path program 11 times [2021-01-06 10:33:26,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:26,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155006851] [2021-01-06 10:33:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:26,044 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:26,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108164304] [2021-01-06 10:33:26,044 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:46,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-01-06 10:33:46,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:46,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 10:33:46,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:48,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155006851] [2021-01-06 10:33:48,784 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:48,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108164304] [2021-01-06 10:33:48,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:48,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-01-06 10:33:48,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338018294] [2021-01-06 10:33:48,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 10:33:48,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:48,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 10:33:48,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:33:48,789 INFO L87 Difference]: Start difference. First operand 236 states and 259 transitions. Second operand 38 states. [2021-01-06 10:33:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:50,231 INFO L93 Difference]: Finished difference Result 1391 states and 1636 transitions. [2021-01-06 10:33:50,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 10:33:50,232 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 201 [2021-01-06 10:33:50,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:50,237 INFO L225 Difference]: With dead ends: 1391 [2021-01-06 10:33:50,237 INFO L226 Difference]: Without dead ends: 1311 [2021-01-06 10:33:50,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:33:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-01-06 10:33:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 256. [2021-01-06 10:33:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2021-01-06 10:33:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 279 transitions. [2021-01-06 10:33:50,267 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 279 transitions. Word has length 201 [2021-01-06 10:33:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:50,267 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 279 transitions. [2021-01-06 10:33:50,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 10:33:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 279 transitions. [2021-01-06 10:33:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-01-06 10:33:50,269 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:50,269 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 36, 35, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:50,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 10:33:50,470 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1764195406, now seen corresponding path program 12 times [2021-01-06 10:33:50,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:50,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343291518] [2021-01-06 10:33:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:50,481 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:50,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591253528] [2021-01-06 10:33:50,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:50,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:33:50,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:50,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:33:50,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:51,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-01-06 10:33:51,173 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:51,206 INFO L625 ElimStorePlain]: treesize reduction 9, result has 73.5 percent of original size [2021-01-06 10:33:51,210 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 21 treesize of output 17 [2021-01-06 10:33:51,211 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:51,226 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:51,227 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:51,227 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-01-06 10:33:51,262 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-01-06 10:33:51,263 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:51,276 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:51,277 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:51,277 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-01-06 10:33:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3599 backedges. 0 proven. 508 refuted. 0 times theorem prover too weak. 3091 trivial. 0 not checked. [2021-01-06 10:33:51,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343291518] [2021-01-06 10:33:51,812 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:51,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591253528] [2021-01-06 10:33:51,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:51,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:33:51,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832985269] [2021-01-06 10:33:51,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:33:51,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:51,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:33:51,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:33:51,814 INFO L87 Difference]: Start difference. First operand 256 states and 279 transitions. Second operand 11 states. [2021-01-06 10:34:05,765 WARN L197 SmtUtils]: Spent 6.60 s on a formula simplification that was a NOOP. DAG size: 40 [2021-01-06 10:34:21,059 WARN L197 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-01-06 10:34:30,672 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod (mod (mod c_ULTIMATE.start_main_~i~0 4294967296) 3) 4294967296))) (and (= c_~N~0 1000) (= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0.base|) (+ |c_ULTIMATE.start_main_~#a~0.offset| (* c_ULTIMATE.start_main_~i~0 4)))) (= c_ULTIMATE.start_main_~R~0 3) (exists ((aux_div_aux_mod_v_ULTIMATE.start_main_~i~0_263_62_49 Int) (aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~i~0_263_62_49_69 Int) (aux_div_v_ULTIMATE.start_main_~i~0_263_62 Int)) (let ((.cse4 (* 3 aux_div_aux_mod_v_ULTIMATE.start_main_~i~0_263_62_49)) (.cse2 (* 4294967296 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~i~0_263_62_49_69))) (let ((.cse1 (+ .cse4 .cse2 (* 4294967296 aux_div_v_ULTIMATE.start_main_~i~0_263_62))) (.cse3 (+ .cse4 .cse2))) (and (<= (+ c_ULTIMATE.start_main_~i~0 4294967293) .cse1) (< .cse1 (+ c_~N~0 4294967294)) (< .cse2 3) (<= 0 .cse3) (< .cse3 4294967296) (<= 0 .cse2))))) (= .cse0 0) (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 3) 4294967296) 0))) is different from false [2021-01-06 10:34:44,924 WARN L197 SmtUtils]: Spent 4.50 s on a formula simplification that was a NOOP. DAG size: 22 [2021-01-06 10:35:01,593 WARN L197 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 23 [2021-01-06 10:35:20,329 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod (mod (mod c_ULTIMATE.start_main_~i~0 4294967296) 3) 4294967296))) (and (= c_~N~0 1000) (= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0.base|) (+ |c_ULTIMATE.start_main_~#a~0.offset| (* c_ULTIMATE.start_main_~i~0 4)))) (= c_ULTIMATE.start_main_~R~0 3) (= .cse0 0) (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967294) 4294967296) 3) 4294967296) 0) (< c_ULTIMATE.start_main_~i~0 c_~N~0))) is different from false