/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_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:29:08,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:29:08,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:29:08,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:29:08,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:29:08,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:29:08,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:29:08,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:29:08,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:29:08,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:29:08,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:29:08,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:29:08,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:29:08,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:29:08,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:29:08,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:29:08,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:29:08,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:29:08,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:29:08,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:29:08,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:29:08,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:29:08,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:29:08,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:29:08,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:29:08,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:29:08,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:29:08,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:29:08,722 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 10:29:08,802 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:29:08,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:29:08,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:29:08,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:29:08,804 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:29:08,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:29:08,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:29:08,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:29:08,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:29:08,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:29:08,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:29:08,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:29:08,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:29:08,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:29:08,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:29:08,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:29:08,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:29:08,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:29:08,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:29:08,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:29:08,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:29:08,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:29:08,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:29:08,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:29:08,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:29:08,812 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:29:09,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:29:09,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:29:09,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:29:09,354 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:29:09,355 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:29:09,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2021-01-06 10:29:09,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e08f8b587/f01c8e965de04c358322556449f705e0/FLAG148b5d4ba [2021-01-06 10:29:10,128 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:29:10,128 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2021-01-06 10:29:10,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e08f8b587/f01c8e965de04c358322556449f705e0/FLAG148b5d4ba [2021-01-06 10:29:10,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e08f8b587/f01c8e965de04c358322556449f705e0 [2021-01-06 10:29:10,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:29:10,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:29:10,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:29:10,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:29:10,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:29:10,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:29:10" (1/1) ... [2021-01-06 10:29:10,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@220cbbf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:10, skipping insertion in model container [2021-01-06 10:29:10,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:29:10" (1/1) ... [2021-01-06 10:29:10,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:29:10,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:29:10,695 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_1.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 10:29:10,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:29:10,731 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:29:10,743 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_1.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 10:29:10,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:29:10,772 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:29:10,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:10 WrapperNode [2021-01-06 10:29:10,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:29:10,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:29:10,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:29:10,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:29:10,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:10" (1/1) ... [2021-01-06 10:29:10,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:10" (1/1) ... [2021-01-06 10:29:10,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:29:10,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:29:10,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:29:10,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:29:10,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:10" (1/1) ... [2021-01-06 10:29:10,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:10" (1/1) ... [2021-01-06 10:29:10,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:10" (1/1) ... [2021-01-06 10:29:10,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:10" (1/1) ... [2021-01-06 10:29:10,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:10" (1/1) ... [2021-01-06 10:29:10,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:10" (1/1) ... [2021-01-06 10:29:10,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:10" (1/1) ... [2021-01-06 10:29:10,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:29:10,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:29:10,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:29:10,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:29:10,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:10" (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 10:29:10,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:29:10,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:29:10,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:29:10,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:29:10,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:29:10,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:29:10,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:29:11,401 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:29:11,401 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 10:29:11,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:29:11 BoogieIcfgContainer [2021-01-06 10:29:11,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:29:11,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:29:11,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:29:11,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:29:11,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:29:10" (1/3) ... [2021-01-06 10:29:11,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3a3e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:29:11, skipping insertion in model container [2021-01-06 10:29:11,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:10" (2/3) ... [2021-01-06 10:29:11,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3a3e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:29:11, skipping insertion in model container [2021-01-06 10:29:11,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:29:11" (3/3) ... [2021-01-06 10:29:11,414 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_1.c [2021-01-06 10:29:11,423 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:29:11,428 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:29:11,451 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:29:11,487 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:29:11,488 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:29:11,488 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:29:11,488 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:29:11,488 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:29:11,488 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:29:11,489 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:29:11,489 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:29:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 10:29:11,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:29:11,513 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:11,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:11,514 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:11,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:11,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2021-01-06 10:29:11,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:11,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817675318] [2021-01-06 10:29:11,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:11,657 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:11,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619559366] [2021-01-06 10:29:11,658 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 10:29:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:11,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2021-01-06 10:29:11,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:11,853 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 10:29:11,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817675318] [2021-01-06 10:29:11,856 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:11,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619559366] [2021-01-06 10:29:11,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:29:11,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:29:11,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90593920] [2021-01-06 10:29:11,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:29:11,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:11,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:29:11,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:29:11,905 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 10:29:11,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:11,932 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-01-06 10:29:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:29:11,933 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 10:29:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:11,968 INFO L225 Difference]: With dead ends: 39 [2021-01-06 10:29:11,968 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 10:29:11,973 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 10:29:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 10:29:12,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 10:29:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:29:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-01-06 10:29:12,025 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-01-06 10:29:12,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:12,027 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-01-06 10:29:12,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:29:12,027 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-01-06 10:29:12,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:29:12,029 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:12,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:12,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 10:29:12,244 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2021-01-06 10:29:12,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:12,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218683244] [2021-01-06 10:29:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:12,281 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:12,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491631789] [2021-01-06 10:29:12,282 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 10:29:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:12,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:29:12,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:12,447 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 10:29:12,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218683244] [2021-01-06 10:29:12,448 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:12,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491631789] [2021-01-06 10:29:12,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:29:12,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:29:12,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605697843] [2021-01-06 10:29:12,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:29:12,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:12,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:29:12,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:29:12,453 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2021-01-06 10:29:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:12,509 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-01-06 10:29:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:29:12,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 10:29:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:12,510 INFO L225 Difference]: With dead ends: 37 [2021-01-06 10:29:12,511 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:29:12,512 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 10:29:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:29:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2021-01-06 10:29:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:29:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-01-06 10:29:12,518 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2021-01-06 10:29:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:12,519 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-01-06 10:29:12,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:29:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-01-06 10:29:12,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:29:12,520 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:12,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:12,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:12,735 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:12,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash 784383783, now seen corresponding path program 1 times [2021-01-06 10:29:12,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:12,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291577012] [2021-01-06 10:29:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:12,757 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:12,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199524824] [2021-01-06 10:29:12,761 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 10:29:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:12,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:29:12,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:12,942 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 10:29:12,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291577012] [2021-01-06 10:29:12,946 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:12,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199524824] [2021-01-06 10:29:12,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:12,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 10:29:12,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628799614] [2021-01-06 10:29:12,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:29:12,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:12,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:29:12,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:29:12,952 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2021-01-06 10:29:13,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:13,055 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2021-01-06 10:29:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:29:13,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 10:29:13,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:13,057 INFO L225 Difference]: With dead ends: 49 [2021-01-06 10:29:13,058 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:29:13,058 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 10:29:13,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:29:13,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2021-01-06 10:29:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 10:29:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-01-06 10:29:13,065 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 16 [2021-01-06 10:29:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:13,065 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-01-06 10:29:13,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:29:13,066 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-01-06 10:29:13,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:29:13,066 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:13,067 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:13,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:13,280 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:13,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1798804362, now seen corresponding path program 2 times [2021-01-06 10:29:13,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:13,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75257355] [2021-01-06 10:29:13,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:13,297 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:13,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341686322] [2021-01-06 10:29:13,298 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 10:29:13,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:29:13,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:13,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:29:13,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:13,508 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:29:13,523 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:29:13,534 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:29:13,544 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:29:13,580 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 10:29:13,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75257355] [2021-01-06 10:29:13,581 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:13,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341686322] [2021-01-06 10:29:13,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:29:13,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:29:13,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694803045] [2021-01-06 10:29:13,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:29:13,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:13,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:29:13,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:29:13,584 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 5 states. [2021-01-06 10:29:13,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:13,737 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-01-06 10:29:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:29:13,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2021-01-06 10:29:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:13,739 INFO L225 Difference]: With dead ends: 34 [2021-01-06 10:29:13,739 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 10:29:13,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:29:13,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 10:29:13,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-01-06 10:29:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:29:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-01-06 10:29:13,747 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 21 [2021-01-06 10:29:13,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:13,748 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-01-06 10:29:13,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:29:13,748 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-01-06 10:29:13,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:29:13,749 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:13,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:13,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:13,963 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:13,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:13,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1798863944, now seen corresponding path program 1 times [2021-01-06 10:29:13,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:13,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346765150] [2021-01-06 10:29:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:13,981 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:13,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768558590] [2021-01-06 10:29:13,981 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 10:29:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:29:14,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:14,198 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 10:29:14,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346765150] [2021-01-06 10:29:14,199 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:14,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768558590] [2021-01-06 10:29:14,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:14,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:29:14,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304170121] [2021-01-06 10:29:14,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:29:14,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:14,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:29:14,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:29:14,201 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 6 states. [2021-01-06 10:29:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:14,309 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2021-01-06 10:29:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:29:14,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 10:29:14,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:14,312 INFO L225 Difference]: With dead ends: 84 [2021-01-06 10:29:14,312 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:29:14,313 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 10:29:14,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:29:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 33. [2021-01-06 10:29:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:29:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-01-06 10:29:14,325 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 21 [2021-01-06 10:29:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:14,325 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-01-06 10:29:14,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:29:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-01-06 10:29:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:29:14,326 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:14,327 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:14,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:14,542 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:14,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:14,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1739403319, now seen corresponding path program 2 times [2021-01-06 10:29:14,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:14,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911997772] [2021-01-06 10:29:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:14,556 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:14,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333049870] [2021-01-06 10:29:14,557 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 10:29:14,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:29:14,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:14,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:29:14,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:14,651 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:29:14,657 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:29:14,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:29:14,948 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:29:14,982 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 10:29:14,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911997772] [2021-01-06 10:29:14,984 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:14,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333049870] [2021-01-06 10:29:14,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:29:14,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 10:29:14,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229694674] [2021-01-06 10:29:14,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:29:14,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:14,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:29:14,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:29:14,989 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 6 states. [2021-01-06 10:29:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:15,229 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-01-06 10:29:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:29:15,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-01-06 10:29:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:15,231 INFO L225 Difference]: With dead ends: 45 [2021-01-06 10:29:15,232 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 10:29:15,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 10:29:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-01-06 10:29:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:29:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-01-06 10:29:15,246 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 26 [2021-01-06 10:29:15,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:15,247 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-01-06 10:29:15,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:29:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-01-06 10:29:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:29:15,249 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:15,249 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 10:29:15,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:15,463 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:15,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1917091815, now seen corresponding path program 1 times [2021-01-06 10:29:15,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:15,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146417112] [2021-01-06 10:29:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:15,476 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:15,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581003816] [2021-01-06 10:29:15,477 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 10:29:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:29:15,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:15,647 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 10:29:15,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146417112] [2021-01-06 10:29:15,647 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:15,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581003816] [2021-01-06 10:29:15,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:15,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:29:15,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656523501] [2021-01-06 10:29:15,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:29:15,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:15,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:29:15,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:29:15,653 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 7 states. [2021-01-06 10:29:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:15,771 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2021-01-06 10:29:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:29:15,771 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-01-06 10:29:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:15,773 INFO L225 Difference]: With dead ends: 122 [2021-01-06 10:29:15,773 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:29:15,774 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 10:29:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:29:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 43. [2021-01-06 10:29:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 10:29:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2021-01-06 10:29:15,782 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 31 [2021-01-06 10:29:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:15,783 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2021-01-06 10:29:15,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:29:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2021-01-06 10:29:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 10:29:15,786 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:15,786 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 10:29:15,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:15,987 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:15,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:15,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1940870472, now seen corresponding path program 2 times [2021-01-06 10:29:15,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:15,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049335310] [2021-01-06 10:29:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:15,999 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:16,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851126021] [2021-01-06 10:29:16,000 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 10:29:16,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:16,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:16,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:29:16,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:16,227 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 10:29:16,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049335310] [2021-01-06 10:29:16,228 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:16,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851126021] [2021-01-06 10:29:16,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:16,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:29:16,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776946038] [2021-01-06 10:29:16,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:29:16,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:16,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:29:16,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:29:16,231 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 8 states. [2021-01-06 10:29:16,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:16,351 INFO L93 Difference]: Finished difference Result 144 states and 176 transitions. [2021-01-06 10:29:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:29:16,352 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2021-01-06 10:29:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:16,354 INFO L225 Difference]: With dead ends: 144 [2021-01-06 10:29:16,354 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 10:29:16,354 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 10:29:16,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 10:29:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 48. [2021-01-06 10:29:16,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:29:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2021-01-06 10:29:16,364 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 36 [2021-01-06 10:29:16,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:16,364 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2021-01-06 10:29:16,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:29:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2021-01-06 10:29:16,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:29:16,366 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:16,366 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 10:29:16,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 10:29:16,581 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:16,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:16,582 INFO L82 PathProgramCache]: Analyzing trace with hash -369911161, now seen corresponding path program 3 times [2021-01-06 10:29:16,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:16,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317207784] [2021-01-06 10:29:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:16,591 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:16,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091126087] [2021-01-06 10:29:16,592 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 10:29:16,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:29:16,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:16,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:29:16,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:16,841 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 10:29:16,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317207784] [2021-01-06 10:29:16,842 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:16,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091126087] [2021-01-06 10:29:16,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:16,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:29:16,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090256676] [2021-01-06 10:29:16,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:29:16,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:16,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:29:16,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:29:16,844 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand 8 states. [2021-01-06 10:29:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:17,019 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2021-01-06 10:29:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:29:17,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2021-01-06 10:29:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:17,020 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:29:17,020 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 10:29:17,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:29:17,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 10:29:17,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-01-06 10:29:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 10:29:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-01-06 10:29:17,029 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 41 [2021-01-06 10:29:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:17,029 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-01-06 10:29:17,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:29:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-01-06 10:29:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:29:17,031 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:17,031 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 10:29:17,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:17,247 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash 466271209, now seen corresponding path program 4 times [2021-01-06 10:29:17,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:17,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025350360] [2021-01-06 10:29:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:17,260 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:17,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133374566] [2021-01-06 10:29:17,261 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 10:29:17,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:17,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:17,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:29:17,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:17,465 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 10:29:17,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025350360] [2021-01-06 10:29:17,466 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:17,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133374566] [2021-01-06 10:29:17,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:17,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:29:17,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13321298] [2021-01-06 10:29:17,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:29:17,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:17,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:29:17,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:17,468 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 9 states. [2021-01-06 10:29:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:17,625 INFO L93 Difference]: Finished difference Result 192 states and 234 transitions. [2021-01-06 10:29:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:29:17,625 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2021-01-06 10:29:17,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:17,627 INFO L225 Difference]: With dead ends: 192 [2021-01-06 10:29:17,627 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 10:29:17,628 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 10:29:17,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 10:29:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 58. [2021-01-06 10:29:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 10:29:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2021-01-06 10:29:17,637 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 46 [2021-01-06 10:29:17,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:17,638 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2021-01-06 10:29:17,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:29:17,638 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2021-01-06 10:29:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:29:17,639 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:17,639 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:17,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:17,854 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:17,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1052472568, now seen corresponding path program 5 times [2021-01-06 10:29:17,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:17,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946238965] [2021-01-06 10:29:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:17,865 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:17,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219109008] [2021-01-06 10:29:17,866 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 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 10:29:18,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 10:29:18,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:18,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:29:18,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:18,566 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 10:29:18,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946238965] [2021-01-06 10:29:18,566 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:18,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219109008] [2021-01-06 10:29:18,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:18,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:29:18,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429585426] [2021-01-06 10:29:18,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:29:18,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:18,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:29:18,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:29:18,569 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 10 states. [2021-01-06 10:29:18,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:18,736 INFO L93 Difference]: Finished difference Result 219 states and 267 transitions. [2021-01-06 10:29:18,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:29:18,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2021-01-06 10:29:18,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:18,739 INFO L225 Difference]: With dead ends: 219 [2021-01-06 10:29:18,739 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 10:29:18,740 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 10:29:18,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 10:29:18,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 63. [2021-01-06 10:29:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:29:18,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2021-01-06 10:29:18,750 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 51 [2021-01-06 10:29:18,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:18,750 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2021-01-06 10:29:18,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:29:18,750 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2021-01-06 10:29:18,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:29:18,751 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:18,752 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:18,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:29:18,958 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:18,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:18,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1005522249, now seen corresponding path program 6 times [2021-01-06 10:29:18,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:18,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263838148] [2021-01-06 10:29:18,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:18,968 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:18,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187421528] [2021-01-06 10:29:18,968 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 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 10:29:19,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:29:19,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:19,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:29:19,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-01-06 10:29:19,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263838148] [2021-01-06 10:29:19,608 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:19,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187421528] [2021-01-06 10:29:19,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:19,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:29:19,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461240646] [2021-01-06 10:29:19,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:29:19,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:19,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:29:19,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:29:19,614 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 10 states. [2021-01-06 10:29:19,916 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-01-06 10:29:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:20,071 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-01-06 10:29:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:29:20,071 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2021-01-06 10:29:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:20,073 INFO L225 Difference]: With dead ends: 75 [2021-01-06 10:29:20,073 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 10:29:20,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:29:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 10:29:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2021-01-06 10:29:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:29:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2021-01-06 10:29:20,084 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 56 [2021-01-06 10:29:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:20,085 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2021-01-06 10:29:20,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:29:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2021-01-06 10:29:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:29:20,086 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:20,086 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:20,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:20,300 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:20,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1573735833, now seen corresponding path program 7 times [2021-01-06 10:29:20,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:20,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434881411] [2021-01-06 10:29:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:20,309 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:20,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42504592] [2021-01-06 10:29:20,309 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 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 10:29:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:20,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:29:20,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:20,554 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 10:29:20,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434881411] [2021-01-06 10:29:20,554 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:20,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42504592] [2021-01-06 10:29:20,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:20,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:29:20,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636957085] [2021-01-06 10:29:20,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:29:20,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:20,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:29:20,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:20,556 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand 11 states. [2021-01-06 10:29:20,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:20,771 INFO L93 Difference]: Finished difference Result 277 states and 337 transitions. [2021-01-06 10:29:20,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:29:20,772 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2021-01-06 10:29:20,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:20,774 INFO L225 Difference]: With dead ends: 277 [2021-01-06 10:29:20,774 INFO L226 Difference]: Without dead ends: 249 [2021-01-06 10:29:20,775 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 10:29:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-01-06 10:29:20,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 73. [2021-01-06 10:29:20,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 10:29:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2021-01-06 10:29:20,786 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 61 [2021-01-06 10:29:20,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:20,787 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2021-01-06 10:29:20,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:29:20,787 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2021-01-06 10:29:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 10:29:20,788 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:20,788 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:21,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:29:21,002 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:21,003 INFO L82 PathProgramCache]: Analyzing trace with hash -500901512, now seen corresponding path program 8 times [2021-01-06 10:29:21,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:21,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477905709] [2021-01-06 10:29:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:21,014 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:21,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524319753] [2021-01-06 10:29:21,015 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 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 10:29:21,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:21,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:21,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:29:21,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:21,313 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 10:29:21,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477905709] [2021-01-06 10:29:21,313 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:21,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524319753] [2021-01-06 10:29:21,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:21,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:29:21,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844457615] [2021-01-06 10:29:21,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:29:21,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:21,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:29:21,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:29:21,316 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand 12 states. [2021-01-06 10:29:21,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:21,513 INFO L93 Difference]: Finished difference Result 309 states and 376 transitions. [2021-01-06 10:29:21,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:29:21,514 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2021-01-06 10:29:21,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:21,516 INFO L225 Difference]: With dead ends: 309 [2021-01-06 10:29:21,516 INFO L226 Difference]: Without dead ends: 281 [2021-01-06 10:29:21,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:29:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-01-06 10:29:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 78. [2021-01-06 10:29:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 10:29:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-01-06 10:29:21,527 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 66 [2021-01-06 10:29:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:21,527 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-01-06 10:29:21,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:29:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-01-06 10:29:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:29:21,528 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:21,528 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:21,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:21,743 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:21,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:21,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1937077511, now seen corresponding path program 9 times [2021-01-06 10:29:21,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:21,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411332929] [2021-01-06 10:29:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:21,753 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:21,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198425818] [2021-01-06 10:29:21,754 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 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 10:29:22,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:29:22,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:22,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:29:22,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-01-06 10:29:22,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411332929] [2021-01-06 10:29:22,361 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:22,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198425818] [2021-01-06 10:29:22,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:22,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:29:22,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661719718] [2021-01-06 10:29:22,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:29:22,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:22,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:29:22,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:22,363 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand 11 states. [2021-01-06 10:29:22,632 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-01-06 10:29:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:22,842 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2021-01-06 10:29:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:29:22,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2021-01-06 10:29:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:22,843 INFO L225 Difference]: With dead ends: 90 [2021-01-06 10:29:22,844 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 10:29:22,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:29:22,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 10:29:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2021-01-06 10:29:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:29:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2021-01-06 10:29:22,853 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 71 [2021-01-06 10:29:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:22,853 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2021-01-06 10:29:22,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:29:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2021-01-06 10:29:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 10:29:22,854 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:22,854 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 10:29:23,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:29:23,068 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:23,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:23,069 INFO L82 PathProgramCache]: Analyzing trace with hash 902656361, now seen corresponding path program 10 times [2021-01-06 10:29:23,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:23,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184603256] [2021-01-06 10:29:23,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:23,077 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:23,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60002420] [2021-01-06 10:29:23,078 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 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 10:29:23,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:23,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:23,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:29:23,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:23,469 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 10:29:23,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184603256] [2021-01-06 10:29:23,469 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:23,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60002420] [2021-01-06 10:29:23,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:23,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:29:23,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923287020] [2021-01-06 10:29:23,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:29:23,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:23,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:29:23,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:29:23,471 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 13 states. [2021-01-06 10:29:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:23,706 INFO L93 Difference]: Finished difference Result 377 states and 458 transitions. [2021-01-06 10:29:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:29:23,707 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2021-01-06 10:29:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:23,709 INFO L225 Difference]: With dead ends: 377 [2021-01-06 10:29:23,709 INFO L226 Difference]: Without dead ends: 344 [2021-01-06 10:29:23,710 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 10:29:23,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-01-06 10:29:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 88. [2021-01-06 10:29:23,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:29:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 115 transitions. [2021-01-06 10:29:23,721 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 115 transitions. Word has length 76 [2021-01-06 10:29:23,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:23,721 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 115 transitions. [2021-01-06 10:29:23,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:29:23,721 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 115 transitions. [2021-01-06 10:29:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 10:29:23,722 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:23,722 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 10:29:23,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:29:23,937 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:23,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:23,938 INFO L82 PathProgramCache]: Analyzing trace with hash 119023160, now seen corresponding path program 11 times [2021-01-06 10:29:23,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:23,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968765464] [2021-01-06 10:29:23,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:23,948 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:23,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806032450] [2021-01-06 10:29:23,949 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 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 10:29:24,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:29:24,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:24,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:29:24,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:24,785 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 10:29:24,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968765464] [2021-01-06 10:29:24,786 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:24,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806032450] [2021-01-06 10:29:24,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:24,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:29:24,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020499870] [2021-01-06 10:29:24,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:29:24,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:24,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:29:24,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:29:24,788 INFO L87 Difference]: Start difference. First operand 88 states and 115 transitions. Second operand 14 states. [2021-01-06 10:29:25,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:25,081 INFO L93 Difference]: Finished difference Result 414 states and 503 transitions. [2021-01-06 10:29:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:29:25,082 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2021-01-06 10:29:25,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:25,085 INFO L225 Difference]: With dead ends: 414 [2021-01-06 10:29:25,085 INFO L226 Difference]: Without dead ends: 381 [2021-01-06 10:29:25,086 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 10:29:25,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-01-06 10:29:25,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 93. [2021-01-06 10:29:25,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 10:29:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-01-06 10:29:25,098 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 81 [2021-01-06 10:29:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:25,098 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-01-06 10:29:25,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:29:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-01-06 10:29:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:29:25,099 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:25,099 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 10:29:25,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:29:25,307 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash -40297783, now seen corresponding path program 12 times [2021-01-06 10:29:25,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:25,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143023793] [2021-01-06 10:29:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:25,316 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:25,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479514416] [2021-01-06 10:29:25,316 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 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 10:29:25,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:29:25,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:25,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:29:25,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:26,578 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:29:26,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:29:26,590 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:29:26,594 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:29:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 60 proven. 202 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:29:26,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143023793] [2021-01-06 10:29:26,689 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:26,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479514416] [2021-01-06 10:29:26,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:26,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:29:26,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113383033] [2021-01-06 10:29:26,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:29:26,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:26,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:29:26,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:29:26,692 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand 16 states. [2021-01-06 10:29:30,160 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-01-06 10:29:30,337 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-01-06 10:29:31,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:31,438 INFO L93 Difference]: Finished difference Result 446 states and 601 transitions. [2021-01-06 10:29:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:29:31,439 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2021-01-06 10:29:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:31,444 INFO L225 Difference]: With dead ends: 446 [2021-01-06 10:29:31,444 INFO L226 Difference]: Without dead ends: 444 [2021-01-06 10:29:31,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:29:31,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-01-06 10:29:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 365. [2021-01-06 10:29:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2021-01-06 10:29:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 503 transitions. [2021-01-06 10:29:31,474 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 503 transitions. Word has length 86 [2021-01-06 10:29:31,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:31,474 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 503 transitions. [2021-01-06 10:29:31,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:29:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 503 transitions. [2021-01-06 10:29:31,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:29:31,476 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:31,476 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:31,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:29:31,677 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:31,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash 630943369, now seen corresponding path program 1 times [2021-01-06 10:29:31,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:31,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369089283] [2021-01-06 10:29:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:31,687 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:31,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34849026] [2021-01-06 10:29:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:31,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:29:31,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:29:32,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369089283] [2021-01-06 10:29:32,085 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:32,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34849026] [2021-01-06 10:29:32,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:32,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 10:29:32,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877843469] [2021-01-06 10:29:32,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:29:32,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:32,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:29:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:29:32,087 INFO L87 Difference]: Start difference. First operand 365 states and 503 transitions. Second operand 15 states. [2021-01-06 10:29:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:32,441 INFO L93 Difference]: Finished difference Result 843 states and 1092 transitions. [2021-01-06 10:29:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:29:32,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 86 [2021-01-06 10:29:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:32,447 INFO L225 Difference]: With dead ends: 843 [2021-01-06 10:29:32,447 INFO L226 Difference]: Without dead ends: 804 [2021-01-06 10:29:32,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:29:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-01-06 10:29:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 400. [2021-01-06 10:29:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2021-01-06 10:29:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 552 transitions. [2021-01-06 10:29:32,477 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 552 transitions. Word has length 86 [2021-01-06 10:29:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:32,477 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 552 transitions. [2021-01-06 10:29:32,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:29:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 552 transitions. [2021-01-06 10:29:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:29:32,478 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:32,479 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 7, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:32,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:32,693 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:32,693 INFO L82 PathProgramCache]: Analyzing trace with hash 166522266, now seen corresponding path program 2 times [2021-01-06 10:29:32,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:32,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342552160] [2021-01-06 10:29:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:32,701 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:32,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819854791] [2021-01-06 10:29:32,702 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 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 10:29:32,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:32,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:32,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:29:32,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:33,178 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 10:29:33,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342552160] [2021-01-06 10:29:33,178 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:33,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819854791] [2021-01-06 10:29:33,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:33,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 10:29:33,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465675385] [2021-01-06 10:29:33,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:29:33,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:33,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:29:33,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:29:33,182 INFO L87 Difference]: Start difference. First operand 400 states and 552 transitions. Second operand 16 states. [2021-01-06 10:29:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:33,570 INFO L93 Difference]: Finished difference Result 915 states and 1185 transitions. [2021-01-06 10:29:33,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:29:33,571 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2021-01-06 10:29:33,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:33,577 INFO L225 Difference]: With dead ends: 915 [2021-01-06 10:29:33,577 INFO L226 Difference]: Without dead ends: 876 [2021-01-06 10:29:33,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:29:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-01-06 10:29:33,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 435. [2021-01-06 10:29:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2021-01-06 10:29:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 601 transitions. [2021-01-06 10:29:33,612 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 601 transitions. Word has length 91 [2021-01-06 10:29:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:33,612 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 601 transitions. [2021-01-06 10:29:33,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:29:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 601 transitions. [2021-01-06 10:29:33,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 10:29:33,614 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:33,614 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 8, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:33,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:33,828 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:33,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:33,828 INFO L82 PathProgramCache]: Analyzing trace with hash 78983465, now seen corresponding path program 3 times [2021-01-06 10:29:33,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:33,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623122802] [2021-01-06 10:29:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:33,837 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:33,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792553388] [2021-01-06 10:29:33,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:33,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:29:33,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:33,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:29:33,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:34,050 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 10:29:34,052 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:29:34,058 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:29:34,059 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:29:34,059 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:29:34,085 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 10:29:34,087 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:29:34,092 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:29:34,093 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 10:29:34,093 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2021-01-06 10:29:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2021-01-06 10:29:34,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623122802] [2021-01-06 10:29:34,165 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:34,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792553388] [2021-01-06 10:29:34,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:29:34,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 10:29:34,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290522540] [2021-01-06 10:29:34,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:29:34,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:34,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:29:34,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:29:34,167 INFO L87 Difference]: Start difference. First operand 435 states and 601 transitions. Second operand 7 states. [2021-01-06 10:29:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:34,358 INFO L93 Difference]: Finished difference Result 1089 states and 1459 transitions. [2021-01-06 10:29:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:29:34,360 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2021-01-06 10:29:34,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:34,366 INFO L225 Difference]: With dead ends: 1089 [2021-01-06 10:29:34,366 INFO L226 Difference]: Without dead ends: 1050 [2021-01-06 10:29:34,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 90 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 10:29:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-01-06 10:29:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 445. [2021-01-06 10:29:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2021-01-06 10:29:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 616 transitions. [2021-01-06 10:29:34,402 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 616 transitions. Word has length 96 [2021-01-06 10:29:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:34,403 INFO L481 AbstractCegarLoop]: Abstraction has 445 states and 616 transitions. [2021-01-06 10:29:34,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:29:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 616 transitions. [2021-01-06 10:29:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 10:29:34,405 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:34,405 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 8, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:34,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:29:34,620 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:34,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:34,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1465186859, now seen corresponding path program 1 times [2021-01-06 10:29:34,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:34,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841016329] [2021-01-06 10:29:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:34,630 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:34,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101357493] [2021-01-06 10:29:34,630 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 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 10:29:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:34,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:29:34,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:29:35,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841016329] [2021-01-06 10:29:35,151 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:35,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101357493] [2021-01-06 10:29:35,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:35,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:29:35,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134857709] [2021-01-06 10:29:35,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:29:35,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:35,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:29:35,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:29:35,153 INFO L87 Difference]: Start difference. First operand 445 states and 616 transitions. Second operand 17 states. [2021-01-06 10:29:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:35,600 INFO L93 Difference]: Finished difference Result 1042 states and 1348 transitions. [2021-01-06 10:29:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:29:35,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2021-01-06 10:29:35,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:35,606 INFO L225 Difference]: With dead ends: 1042 [2021-01-06 10:29:35,607 INFO L226 Difference]: Without dead ends: 1003 [2021-01-06 10:29:35,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:29:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-01-06 10:29:35,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 480. [2021-01-06 10:29:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2021-01-06 10:29:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 665 transitions. [2021-01-06 10:29:35,644 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 665 transitions. Word has length 96 [2021-01-06 10:29:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:35,644 INFO L481 AbstractCegarLoop]: Abstraction has 480 states and 665 transitions. [2021-01-06 10:29:35,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:29:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 665 transitions. [2021-01-06 10:29:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:29:35,646 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:35,646 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 9, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:35,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:35,860 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:35,860 INFO L82 PathProgramCache]: Analyzing trace with hash 574855164, now seen corresponding path program 2 times [2021-01-06 10:29:35,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:35,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415654528] [2021-01-06 10:29:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:35,874 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:35,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395307235] [2021-01-06 10:29:35,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:35,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:35,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:35,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:29:35,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:36,437 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 10:29:36,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415654528] [2021-01-06 10:29:36,438 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:36,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395307235] [2021-01-06 10:29:36,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:36,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 10:29:36,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935424066] [2021-01-06 10:29:36,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:29:36,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:29:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:29:36,440 INFO L87 Difference]: Start difference. First operand 480 states and 665 transitions. Second operand 18 states. [2021-01-06 10:29:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:36,898 INFO L93 Difference]: Finished difference Result 1114 states and 1441 transitions. [2021-01-06 10:29:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:29:36,900 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2021-01-06 10:29:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:36,906 INFO L225 Difference]: With dead ends: 1114 [2021-01-06 10:29:36,906 INFO L226 Difference]: Without dead ends: 1075 [2021-01-06 10:29:36,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:29:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-01-06 10:29:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 515. [2021-01-06 10:29:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2021-01-06 10:29:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 714 transitions. [2021-01-06 10:29:36,949 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 714 transitions. Word has length 101 [2021-01-06 10:29:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:36,949 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 714 transitions. [2021-01-06 10:29:36,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:29:36,950 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 714 transitions. [2021-01-06 10:29:36,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:29:36,952 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:36,952 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 10, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:37,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:29:37,166 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:37,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1234433227, now seen corresponding path program 3 times [2021-01-06 10:29:37,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:37,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408707990] [2021-01-06 10:29:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:37,182 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:37,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733567942] [2021-01-06 10:29:37,182 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 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 10:29:37,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:29:37,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:37,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:29:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:37,389 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 10:29:37,391 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:29:37,396 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:29:37,397 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:29:37,397 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:29:37,418 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 10:29:37,420 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:29:37,425 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:29:37,426 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 10:29:37,426 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2021-01-06 10:29:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 132 proven. 5 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2021-01-06 10:29:37,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408707990] [2021-01-06 10:29:37,521 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:37,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733567942] [2021-01-06 10:29:37,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:37,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:29:37,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000509174] [2021-01-06 10:29:37,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:29:37,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:37,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:29:37,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:29:37,522 INFO L87 Difference]: Start difference. First operand 515 states and 714 transitions. Second operand 8 states. [2021-01-06 10:29:37,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:37,812 INFO L93 Difference]: Finished difference Result 1737 states and 2340 transitions. [2021-01-06 10:29:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:29:37,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2021-01-06 10:29:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:37,822 INFO L225 Difference]: With dead ends: 1737 [2021-01-06 10:29:37,822 INFO L226 Difference]: Without dead ends: 1698 [2021-01-06 10:29:37,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:29:37,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-01-06 10:29:37,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 525. [2021-01-06 10:29:37,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2021-01-06 10:29:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 729 transitions. [2021-01-06 10:29:37,867 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 729 transitions. Word has length 106 [2021-01-06 10:29:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:37,868 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 729 transitions. [2021-01-06 10:29:37,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:29:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 729 transitions. [2021-01-06 10:29:37,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:29:37,870 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:37,870 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 10, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:38,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:38,085 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:38,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1009550071, now seen corresponding path program 4 times [2021-01-06 10:29:38,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:38,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477187156] [2021-01-06 10:29:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:38,093 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:38,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246707946] [2021-01-06 10:29:38,094 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 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 10:29:38,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:38,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:38,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:29:38,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:38,260 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 10:29:38,261 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:29:38,266 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:29:38,267 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:29:38,267 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:29:38,303 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 10:29:38,304 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:29:38,309 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:29:38,311 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 10:29:38,311 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2021-01-06 10:29:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 337 proven. 5 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-01-06 10:29:38,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477187156] [2021-01-06 10:29:38,377 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:38,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246707946] [2021-01-06 10:29:38,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:38,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:29:38,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762164187] [2021-01-06 10:29:38,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:29:38,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:38,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:29:38,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:29:38,378 INFO L87 Difference]: Start difference. First operand 525 states and 729 transitions. Second operand 10 states. [2021-01-06 10:29:38,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:38,607 INFO L93 Difference]: Finished difference Result 1072 states and 1446 transitions. [2021-01-06 10:29:38,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:29:38,608 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2021-01-06 10:29:38,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:38,612 INFO L225 Difference]: With dead ends: 1072 [2021-01-06 10:29:38,612 INFO L226 Difference]: Without dead ends: 782 [2021-01-06 10:29:38,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:38,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-01-06 10:29:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 605. [2021-01-06 10:29:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2021-01-06 10:29:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 789 transitions. [2021-01-06 10:29:38,670 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 789 transitions. Word has length 106 [2021-01-06 10:29:38,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:38,671 INFO L481 AbstractCegarLoop]: Abstraction has 605 states and 789 transitions. [2021-01-06 10:29:38,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:29:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 789 transitions. [2021-01-06 10:29:38,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:29:38,673 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:38,673 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 10, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:38,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:29:38,887 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:38,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:38,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1152066057, now seen corresponding path program 5 times [2021-01-06 10:29:38,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:38,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933538695] [2021-01-06 10:29:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:38,895 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:38,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353745682] [2021-01-06 10:29:38,895 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 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 10:29:39,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-01-06 10:29:39,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:39,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:29:39,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:29:40,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933538695] [2021-01-06 10:29:40,154 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:40,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353745682] [2021-01-06 10:29:40,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:40,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-01-06 10:29:40,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121355424] [2021-01-06 10:29:40,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:29:40,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:40,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:29:40,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:29:40,156 INFO L87 Difference]: Start difference. First operand 605 states and 789 transitions. Second operand 19 states. [2021-01-06 10:29:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:40,689 INFO L93 Difference]: Finished difference Result 1251 states and 1572 transitions. [2021-01-06 10:29:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:29:40,691 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 106 [2021-01-06 10:29:40,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:40,696 INFO L225 Difference]: With dead ends: 1251 [2021-01-06 10:29:40,696 INFO L226 Difference]: Without dead ends: 1212 [2021-01-06 10:29:40,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:29:40,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-01-06 10:29:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 650. [2021-01-06 10:29:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2021-01-06 10:29:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 847 transitions. [2021-01-06 10:29:40,755 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 847 transitions. Word has length 106 [2021-01-06 10:29:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:40,755 INFO L481 AbstractCegarLoop]: Abstraction has 650 states and 847 transitions. [2021-01-06 10:29:40,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:29:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 847 transitions. [2021-01-06 10:29:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 10:29:40,758 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:40,758 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 11, 11, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:40,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:29:40,965 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:40,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1665060068, now seen corresponding path program 6 times [2021-01-06 10:29:40,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:40,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205279372] [2021-01-06 10:29:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:40,974 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:40,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457955770] [2021-01-06 10:29:40,975 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 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 10:29:41,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:29:41,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:41,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:29:41,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2021-01-06 10:29:41,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205279372] [2021-01-06 10:29:41,806 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:41,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457955770] [2021-01-06 10:29:41,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:41,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:29:41,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222698383] [2021-01-06 10:29:41,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:29:41,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:41,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:29:41,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:29:41,808 INFO L87 Difference]: Start difference. First operand 650 states and 847 transitions. Second operand 12 states. [2021-01-06 10:29:41,964 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-01-06 10:29:42,177 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-01-06 10:29:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:42,511 INFO L93 Difference]: Finished difference Result 691 states and 896 transitions. [2021-01-06 10:29:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:29:42,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2021-01-06 10:29:42,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:42,514 INFO L225 Difference]: With dead ends: 691 [2021-01-06 10:29:42,514 INFO L226 Difference]: Without dead ends: 689 [2021-01-06 10:29:42,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:29:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-01-06 10:29:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 145. [2021-01-06 10:29:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 10:29:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 185 transitions. [2021-01-06 10:29:42,533 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 185 transitions. Word has length 111 [2021-01-06 10:29:42,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:42,533 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 185 transitions. [2021-01-06 10:29:42,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:29:42,533 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 185 transitions. [2021-01-06 10:29:42,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-01-06 10:29:42,534 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:42,534 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:42,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:29:42,748 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:42,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:42,748 INFO L82 PathProgramCache]: Analyzing trace with hash 140542712, now seen corresponding path program 13 times [2021-01-06 10:29:42,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:42,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637361766] [2021-01-06 10:29:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:42,756 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:42,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796571697] [2021-01-06 10:29:42,757 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 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 10:29:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:42,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:29:42,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:29:43,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637361766] [2021-01-06 10:29:43,372 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:43,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796571697] [2021-01-06 10:29:43,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:43,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 10:29:43,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669454180] [2021-01-06 10:29:43,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:29:43,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:43,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:29:43,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:29:43,373 INFO L87 Difference]: Start difference. First operand 145 states and 185 transitions. Second operand 20 states. [2021-01-06 10:29:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:43,917 INFO L93 Difference]: Finished difference Result 728 states and 878 transitions. [2021-01-06 10:29:43,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:29:43,918 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 116 [2021-01-06 10:29:43,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:43,921 INFO L225 Difference]: With dead ends: 728 [2021-01-06 10:29:43,921 INFO L226 Difference]: Without dead ends: 690 [2021-01-06 10:29:43,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:29:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-01-06 10:29:43,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 152. [2021-01-06 10:29:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 10:29:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 194 transitions. [2021-01-06 10:29:43,947 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 194 transitions. Word has length 116 [2021-01-06 10:29:43,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:43,947 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 194 transitions. [2021-01-06 10:29:43,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:29:43,947 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 194 transitions. [2021-01-06 10:29:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-06 10:29:43,948 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:43,948 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:44,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:29:44,162 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:44,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:44,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1687552825, now seen corresponding path program 14 times [2021-01-06 10:29:44,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:44,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619449687] [2021-01-06 10:29:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:44,173 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:44,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725130014] [2021-01-06 10:29:44,174 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 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 10:29:44,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:44,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:44,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:29:44,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:29:44,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619449687] [2021-01-06 10:29:44,883 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:44,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725130014] [2021-01-06 10:29:44,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:44,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-01-06 10:29:44,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486581162] [2021-01-06 10:29:44,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:29:44,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:29:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:29:44,885 INFO L87 Difference]: Start difference. First operand 152 states and 194 transitions. Second operand 21 states. [2021-01-06 10:29:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:45,459 INFO L93 Difference]: Finished difference Result 772 states and 931 transitions. [2021-01-06 10:29:45,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:29:45,460 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 121 [2021-01-06 10:29:45,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:45,463 INFO L225 Difference]: With dead ends: 772 [2021-01-06 10:29:45,463 INFO L226 Difference]: Without dead ends: 734 [2021-01-06 10:29:45,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:29:45,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-01-06 10:29:45,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 159. [2021-01-06 10:29:45,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 10:29:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 203 transitions. [2021-01-06 10:29:45,490 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 203 transitions. Word has length 121 [2021-01-06 10:29:45,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:45,491 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 203 transitions. [2021-01-06 10:29:45,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:29:45,491 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 203 transitions. [2021-01-06 10:29:45,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 10:29:45,492 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:45,492 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:45,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:29:45,706 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:45,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:45,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1637829720, now seen corresponding path program 15 times [2021-01-06 10:29:45,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:45,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642232895] [2021-01-06 10:29:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:45,714 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:45,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718524253] [2021-01-06 10:29:45,714 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 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 10:29:46,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:29:46,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:46,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:29:46,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-01-06 10:29:46,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642232895] [2021-01-06 10:29:46,510 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:46,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718524253] [2021-01-06 10:29:46,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:46,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:29:46,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509503604] [2021-01-06 10:29:46,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:29:46,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:46,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:29:46,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:29:46,521 INFO L87 Difference]: Start difference. First operand 159 states and 203 transitions. Second operand 13 states. [2021-01-06 10:29:48,662 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-01-06 10:29:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:49,269 INFO L93 Difference]: Finished difference Result 171 states and 217 transitions. [2021-01-06 10:29:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:29:49,269 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 126 [2021-01-06 10:29:49,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:49,270 INFO L225 Difference]: With dead ends: 171 [2021-01-06 10:29:49,270 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 10:29:49,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:29:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 10:29:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2021-01-06 10:29:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 10:29:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 209 transitions. [2021-01-06 10:29:49,298 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 209 transitions. Word has length 126 [2021-01-06 10:29:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:49,298 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 209 transitions. [2021-01-06 10:29:49,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:29:49,298 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 209 transitions. [2021-01-06 10:29:49,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-01-06 10:29:49,299 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:49,299 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:49,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:49,512 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:49,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:49,513 INFO L82 PathProgramCache]: Analyzing trace with hash 627737784, now seen corresponding path program 16 times [2021-01-06 10:29:49,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:49,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958870194] [2021-01-06 10:29:49,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:49,522 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:49,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073743703] [2021-01-06 10:29:49,523 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 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 10:29:50,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:50,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:50,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:29:50,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-01-06 10:29:51,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958870194] [2021-01-06 10:29:51,029 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:51,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073743703] [2021-01-06 10:29:51,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:51,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-01-06 10:29:51,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948021004] [2021-01-06 10:29:51,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:29:51,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:51,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:29:51,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:29:51,031 INFO L87 Difference]: Start difference. First operand 164 states and 209 transitions. Second operand 22 states. [2021-01-06 10:29:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:51,666 INFO L93 Difference]: Finished difference Result 887 states and 1069 transitions. [2021-01-06 10:29:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:29:51,667 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 131 [2021-01-06 10:29:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:51,670 INFO L225 Difference]: With dead ends: 887 [2021-01-06 10:29:51,670 INFO L226 Difference]: Without dead ends: 844 [2021-01-06 10:29:51,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:29:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-01-06 10:29:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 171. [2021-01-06 10:29:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-01-06 10:29:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 218 transitions. [2021-01-06 10:29:51,700 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 218 transitions. Word has length 131 [2021-01-06 10:29:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:51,700 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 218 transitions. [2021-01-06 10:29:51,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:29:51,701 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 218 transitions. [2021-01-06 10:29:51,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 10:29:51,701 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:51,702 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:51,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:51,916 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:51,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:51,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1444041481, now seen corresponding path program 17 times [2021-01-06 10:29:51,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:51,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621445293] [2021-01-06 10:29:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:51,925 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:51,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864173691] [2021-01-06 10:29:51,926 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 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 10:30:01,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-01-06 10:30:01,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:01,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:30:01,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-01-06 10:30:02,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621445293] [2021-01-06 10:30:02,477 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:02,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864173691] [2021-01-06 10:30:02,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:02,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-01-06 10:30:02,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540543960] [2021-01-06 10:30:02,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:30:02,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:02,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:30:02,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:30:02,479 INFO L87 Difference]: Start difference. First operand 171 states and 218 transitions. Second operand 23 states. [2021-01-06 10:30:03,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:03,277 INFO L93 Difference]: Finished difference Result 936 states and 1128 transitions. [2021-01-06 10:30:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 10:30:03,278 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 136 [2021-01-06 10:30:03,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:03,282 INFO L225 Difference]: With dead ends: 936 [2021-01-06 10:30:03,282 INFO L226 Difference]: Without dead ends: 893 [2021-01-06 10:30:03,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:30:03,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-01-06 10:30:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 178. [2021-01-06 10:30:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 10:30:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 227 transitions. [2021-01-06 10:30:03,311 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 227 transitions. Word has length 136 [2021-01-06 10:30:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:03,312 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 227 transitions. [2021-01-06 10:30:03,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:30:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 227 transitions. [2021-01-06 10:30:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-01-06 10:30:03,313 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:03,313 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:03,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 10:30:03,526 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:03,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:03,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2041327784, now seen corresponding path program 18 times [2021-01-06 10:30:03,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:03,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913349494] [2021-01-06 10:30:03,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:03,535 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:03,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109541647] [2021-01-06 10:30:03,535 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 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 10:30:04,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:30:04,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:04,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 10:30:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2021-01-06 10:30:04,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913349494] [2021-01-06 10:30:04,965 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:04,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109541647] [2021-01-06 10:30:04,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:04,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:30:04,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265099794] [2021-01-06 10:30:04,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:30:04,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:04,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:30:04,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:30:04,966 INFO L87 Difference]: Start difference. First operand 178 states and 227 transitions. Second operand 14 states. [2021-01-06 10:30:05,332 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-01-06 10:30:05,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:05,882 INFO L93 Difference]: Finished difference Result 190 states and 241 transitions. [2021-01-06 10:30:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:30:05,883 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 141 [2021-01-06 10:30:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:05,884 INFO L225 Difference]: With dead ends: 190 [2021-01-06 10:30:05,884 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 10:30:05,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:30:05,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 10:30:05,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 183. [2021-01-06 10:30:05,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-01-06 10:30:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 233 transitions. [2021-01-06 10:30:05,912 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 233 transitions. Word has length 141 [2021-01-06 10:30:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:05,913 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 233 transitions. [2021-01-06 10:30:05,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:30:05,913 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 233 transitions. [2021-01-06 10:30:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-01-06 10:30:05,914 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:05,914 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:06,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:06,122 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:06,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:06,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1544544696, now seen corresponding path program 19 times [2021-01-06 10:30:06,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:06,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831155090] [2021-01-06 10:30:06,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:06,131 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:06,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520771318] [2021-01-06 10:30:06,132 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 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 10:30:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:30:06,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:30:06,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:30:07,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831155090] [2021-01-06 10:30:07,002 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:07,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520771318] [2021-01-06 10:30:07,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:07,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 10:30:07,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876258623] [2021-01-06 10:30:07,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:30:07,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:07,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:30:07,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:30:07,005 INFO L87 Difference]: Start difference. First operand 183 states and 233 transitions. Second operand 24 states. [2021-01-06 10:30:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:07,798 INFO L93 Difference]: Finished difference Result 1061 states and 1278 transitions. [2021-01-06 10:30:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:30:07,799 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2021-01-06 10:30:07,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:07,803 INFO L225 Difference]: With dead ends: 1061 [2021-01-06 10:30:07,803 INFO L226 Difference]: Without dead ends: 1013 [2021-01-06 10:30:07,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:30:07,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-01-06 10:30:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 190. [2021-01-06 10:30:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2021-01-06 10:30:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 242 transitions. [2021-01-06 10:30:07,845 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 242 transitions. Word has length 146 [2021-01-06 10:30:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:07,846 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 242 transitions. [2021-01-06 10:30:07,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:30:07,846 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 242 transitions. [2021-01-06 10:30:07,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 10:30:07,847 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:07,847 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:08,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 10:30:08,065 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:08,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1472624825, now seen corresponding path program 20 times [2021-01-06 10:30:08,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:08,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277858696] [2021-01-06 10:30:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:08,073 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:08,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640248279] [2021-01-06 10:30:08,074 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 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 10:30:08,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:30:08,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:08,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:30:08,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:30:08,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277858696] [2021-01-06 10:30:08,967 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:08,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640248279] [2021-01-06 10:30:08,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:08,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-01-06 10:30:08,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472059925] [2021-01-06 10:30:08,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:30:08,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:08,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:30:08,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:30:08,969 INFO L87 Difference]: Start difference. First operand 190 states and 242 transitions. Second operand 25 states. [2021-01-06 10:30:09,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:09,815 INFO L93 Difference]: Finished difference Result 1115 states and 1343 transitions. [2021-01-06 10:30:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:30:09,817 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 151 [2021-01-06 10:30:09,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:09,821 INFO L225 Difference]: With dead ends: 1115 [2021-01-06 10:30:09,821 INFO L226 Difference]: Without dead ends: 1067 [2021-01-06 10:30:09,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:30:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-01-06 10:30:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 197. [2021-01-06 10:30:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2021-01-06 10:30:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 251 transitions. [2021-01-06 10:30:09,848 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 251 transitions. Word has length 151 [2021-01-06 10:30:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:09,848 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 251 transitions. [2021-01-06 10:30:09,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:30:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 251 transitions. [2021-01-06 10:30:09,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-01-06 10:30:09,849 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:09,849 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:10,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:10,050 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:10,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:10,051 INFO L82 PathProgramCache]: Analyzing trace with hash 290718488, now seen corresponding path program 21 times [2021-01-06 10:30:10,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:10,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496779954] [2021-01-06 10:30:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:10,061 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:10,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377641116] [2021-01-06 10:30:10,061 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:10,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:30:10,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:10,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 10:30:10,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1310 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2021-01-06 10:30:11,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496779954] [2021-01-06 10:30:11,383 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:11,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377641116] [2021-01-06 10:30:11,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:11,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 10:30:11,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569926018] [2021-01-06 10:30:11,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:30:11,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:11,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:30:11,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:30:11,385 INFO L87 Difference]: Start difference. First operand 197 states and 251 transitions. Second operand 15 states. [2021-01-06 10:30:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:12,377 INFO L93 Difference]: Finished difference Result 209 states and 265 transitions. [2021-01-06 10:30:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:30:12,378 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 156 [2021-01-06 10:30:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:12,380 INFO L225 Difference]: With dead ends: 209 [2021-01-06 10:30:12,380 INFO L226 Difference]: Without dead ends: 207 [2021-01-06 10:30:12,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:30:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-01-06 10:30:12,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 202. [2021-01-06 10:30:12,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-01-06 10:30:12,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 257 transitions. [2021-01-06 10:30:12,401 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 257 transitions. Word has length 156 [2021-01-06 10:30:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:12,402 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 257 transitions. [2021-01-06 10:30:12,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:30:12,402 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 257 transitions. [2021-01-06 10:30:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 10:30:12,402 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:12,403 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:12,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 10:30:12,604 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:12,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:12,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2488840, now seen corresponding path program 22 times [2021-01-06 10:30:12,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:12,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550471769] [2021-01-06 10:30:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:12,613 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:12,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568495977] [2021-01-06 10:30:12,613 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:14,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:30:14,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:14,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:30:14,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1349 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-01-06 10:30:15,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550471769] [2021-01-06 10:30:15,313 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:15,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568495977] [2021-01-06 10:30:15,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:15,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-01-06 10:30:15,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095372337] [2021-01-06 10:30:15,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:30:15,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:15,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:30:15,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:30:15,315 INFO L87 Difference]: Start difference. First operand 202 states and 257 transitions. Second operand 26 states. [2021-01-06 10:30:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:16,211 INFO L93 Difference]: Finished difference Result 1250 states and 1505 transitions. [2021-01-06 10:30:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:30:16,213 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 161 [2021-01-06 10:30:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:16,218 INFO L225 Difference]: With dead ends: 1250 [2021-01-06 10:30:16,218 INFO L226 Difference]: Without dead ends: 1197 [2021-01-06 10:30:16,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:30:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-01-06 10:30:16,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 209. [2021-01-06 10:30:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-01-06 10:30:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 266 transitions. [2021-01-06 10:30:16,262 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 266 transitions. Word has length 161 [2021-01-06 10:30:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:16,263 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 266 transitions. [2021-01-06 10:30:16,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:30:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 266 transitions. [2021-01-06 10:30:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 10:30:16,264 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:16,264 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:16,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:30:16,478 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:16,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1056132983, now seen corresponding path program 23 times [2021-01-06 10:30:16,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:16,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443323026] [2021-01-06 10:30:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:16,488 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:16,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950798695] [2021-01-06 10:30:16,488 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:34,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 10:30:34,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:34,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:30:34,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-01-06 10:30:35,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443323026] [2021-01-06 10:30:35,488 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:35,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950798695] [2021-01-06 10:30:35,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:35,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-01-06 10:30:35,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325797409] [2021-01-06 10:30:35,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:30:35,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:35,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:30:35,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:30:35,498 INFO L87 Difference]: Start difference. First operand 209 states and 266 transitions. Second operand 27 states. [2021-01-06 10:30:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:36,525 INFO L93 Difference]: Finished difference Result 1309 states and 1576 transitions. [2021-01-06 10:30:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:30:36,527 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 166 [2021-01-06 10:30:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:36,531 INFO L225 Difference]: With dead ends: 1309 [2021-01-06 10:30:36,531 INFO L226 Difference]: Without dead ends: 1256 [2021-01-06 10:30:36,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:30:36,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-01-06 10:30:36,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 216. [2021-01-06 10:30:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2021-01-06 10:30:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 275 transitions. [2021-01-06 10:30:36,571 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 275 transitions. Word has length 166 [2021-01-06 10:30:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:36,572 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 275 transitions. [2021-01-06 10:30:36,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:30:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 275 transitions. [2021-01-06 10:30:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-01-06 10:30:36,573 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:36,573 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:36,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:30:36,787 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:36,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:36,787 INFO L82 PathProgramCache]: Analyzing trace with hash -27068264, now seen corresponding path program 24 times [2021-01-06 10:30:36,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:36,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014340177] [2021-01-06 10:30:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:36,797 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:36,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278609008] [2021-01-06 10:30:36,798 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:49,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 10:30:49,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:49,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 10:30:49,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 1357 trivial. 0 not checked. [2021-01-06 10:30:49,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014340177] [2021-01-06 10:30:49,912 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:49,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278609008] [2021-01-06 10:30:49,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:49,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:30:49,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106176155] [2021-01-06 10:30:49,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:30:49,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:49,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:30:49,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:30:49,913 INFO L87 Difference]: Start difference. First operand 216 states and 275 transitions. Second operand 17 states. [2021-01-06 10:30:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:51,011 INFO L93 Difference]: Finished difference Result 229 states and 290 transitions. [2021-01-06 10:30:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:30:51,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2021-01-06 10:30:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:51,013 INFO L225 Difference]: With dead ends: 229 [2021-01-06 10:30:51,013 INFO L226 Difference]: Without dead ends: 227 [2021-01-06 10:30:51,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:30:51,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-01-06 10:30:51,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 221. [2021-01-06 10:30:51,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2021-01-06 10:30:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 281 transitions. [2021-01-06 10:30:51,046 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 281 transitions. Word has length 171 [2021-01-06 10:30:51,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:51,046 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 281 transitions. [2021-01-06 10:30:51,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:30:51,046 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 281 transitions. [2021-01-06 10:30:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-01-06 10:30:51,047 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:51,048 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:51,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:30:51,261 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash -112689032, now seen corresponding path program 25 times [2021-01-06 10:30:51,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:51,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046007069] [2021-01-06 10:30:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:51,270 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:51,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308551752] [2021-01-06 10:30:51,270 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:30:51,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:30:51,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-01-06 10:30:52,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046007069] [2021-01-06 10:30:52,394 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:52,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308551752] [2021-01-06 10:30:52,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:52,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-01-06 10:30:52,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703821211] [2021-01-06 10:30:52,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:30:52,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:52,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:30:52,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:30:52,396 INFO L87 Difference]: Start difference. First operand 221 states and 281 transitions. Second operand 28 states. [2021-01-06 10:30:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:53,489 INFO L93 Difference]: Finished difference Result 1454 states and 1750 transitions. [2021-01-06 10:30:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:30:53,491 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 176 [2021-01-06 10:30:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:53,495 INFO L225 Difference]: With dead ends: 1454 [2021-01-06 10:30:53,496 INFO L226 Difference]: Without dead ends: 1396 [2021-01-06 10:30:53,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:30:53,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-01-06 10:30:53,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 228. [2021-01-06 10:30:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2021-01-06 10:30:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 290 transitions. [2021-01-06 10:30:53,551 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 290 transitions. Word has length 176 [2021-01-06 10:30:53,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:53,551 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 290 transitions. [2021-01-06 10:30:53,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:30:53,551 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 290 transitions. [2021-01-06 10:30:53,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 10:30:53,552 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:53,553 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:53,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:30:53,766 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:53,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:53,766 INFO L82 PathProgramCache]: Analyzing trace with hash 248201671, now seen corresponding path program 26 times [2021-01-06 10:30:53,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:53,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402387860] [2021-01-06 10:30:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:53,775 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:53,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591036533] [2021-01-06 10:30:53,775 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:53,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:30:53,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:53,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:30:53,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-01-06 10:30:54,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402387860] [2021-01-06 10:30:54,973 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:54,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591036533] [2021-01-06 10:30:54,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:54,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-01-06 10:30:54,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465797348] [2021-01-06 10:30:54,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:30:54,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:54,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:30:54,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:30:54,975 INFO L87 Difference]: Start difference. First operand 228 states and 290 transitions. Second operand 29 states. [2021-01-06 10:30:56,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:56,353 INFO L93 Difference]: Finished difference Result 1518 states and 1827 transitions. [2021-01-06 10:30:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:30:56,355 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 181 [2021-01-06 10:30:56,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:56,361 INFO L225 Difference]: With dead ends: 1518 [2021-01-06 10:30:56,362 INFO L226 Difference]: Without dead ends: 1460 [2021-01-06 10:30:56,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:30:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-01-06 10:30:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 235. [2021-01-06 10:30:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2021-01-06 10:30:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2021-01-06 10:30:56,393 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 181 [2021-01-06 10:30:56,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:56,393 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2021-01-06 10:30:56,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:30:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2021-01-06 10:30:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-01-06 10:30:56,394 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:56,394 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:56,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:56,596 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:56,596 INFO L82 PathProgramCache]: Analyzing trace with hash -123209256, now seen corresponding path program 27 times [2021-01-06 10:30:56,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:56,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18577870] [2021-01-06 10:30:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:56,604 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:56,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431345438] [2021-01-06 10:30:56,604 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:57,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:30:57,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:30:57,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 10:30:57,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1867 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-01-06 10:30:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18577870] [2021-01-06 10:30:58,450 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431345438] [2021-01-06 10:30:58,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:58,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 10:30:58,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802285028] [2021-01-06 10:30:58,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:30:58,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:58,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:30:58,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:30:58,451 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand 18 states. [2021-01-06 10:30:58,626 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-01-06 10:30:58,878 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-01-06 10:30:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:59,812 INFO L93 Difference]: Finished difference Result 247 states and 313 transitions. [2021-01-06 10:30:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:30:59,813 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 186 [2021-01-06 10:30:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:59,814 INFO L225 Difference]: With dead ends: 247 [2021-01-06 10:30:59,814 INFO L226 Difference]: Without dead ends: 245 [2021-01-06 10:30:59,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:30:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-01-06 10:30:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 240. [2021-01-06 10:30:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2021-01-06 10:30:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 305 transitions. [2021-01-06 10:30:59,852 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 305 transitions. Word has length 186 [2021-01-06 10:30:59,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:59,853 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 305 transitions. [2021-01-06 10:30:59,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:30:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 305 transitions. [2021-01-06 10:30:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-01-06 10:30:59,854 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:59,854 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:00,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:00,061 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:00,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1003337928, now seen corresponding path program 28 times [2021-01-06 10:31:00,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:00,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332801118] [2021-01-06 10:31:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:00,071 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:00,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775138574] [2021-01-06 10:31:00,072 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:04,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:31:04,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:04,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:31:04,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1916 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-01-06 10:31:05,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332801118] [2021-01-06 10:31:05,329 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:05,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775138574] [2021-01-06 10:31:05,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:05,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-01-06 10:31:05,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57983607] [2021-01-06 10:31:05,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:31:05,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:05,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:31:05,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:31:05,331 INFO L87 Difference]: Start difference. First operand 240 states and 305 transitions. Second operand 30 states. [2021-01-06 10:31:06,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:06,613 INFO L93 Difference]: Finished difference Result 1673 states and 2013 transitions. [2021-01-06 10:31:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:31:06,615 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 191 [2021-01-06 10:31:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:06,621 INFO L225 Difference]: With dead ends: 1673 [2021-01-06 10:31:06,621 INFO L226 Difference]: Without dead ends: 1610 [2021-01-06 10:31:06,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:31:06,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-01-06 10:31:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 247. [2021-01-06 10:31:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2021-01-06 10:31:06,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 314 transitions. [2021-01-06 10:31:06,657 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 314 transitions. Word has length 191 [2021-01-06 10:31:06,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:06,657 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 314 transitions. [2021-01-06 10:31:06,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 10:31:06,658 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 314 transitions. [2021-01-06 10:31:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-01-06 10:31:06,659 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:06,659 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:06,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:06,868 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:06,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:06,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1320738313, now seen corresponding path program 29 times [2021-01-06 10:31:06,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:06,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741170675] [2021-01-06 10:31:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:06,878 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:06,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497624853] [2021-01-06 10:31:06,878 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true