/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_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:29:06,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:29:06,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:29:06,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:29:06,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:29:06,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:29:06,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:29:06,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:29:06,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:29:06,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:29:06,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:29:06,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:29:06,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:29:06,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:29:06,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:29:06,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:29:06,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:29:06,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:29:06,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:29:06,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:29:06,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:29:06,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:29:06,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:29:06,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:29:06,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:29:06,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:29:06,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:29:06,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:29:06,712 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 10:29:06,773 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:29:06,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:29:06,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:29:06,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:29:06,780 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:29:06,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:29:06,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:29:06,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:29:06,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:29:06,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:29:06,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:29:06,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:29:06,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:29:06,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:29:06,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:29:06,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:29:06,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:29:06,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:29:06,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:29:06,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:29:06,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:29:06,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:29:06,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:29:06,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:29:06,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:29:06,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:29:07,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:29:07,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:29:07,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:29:07,307 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:29:07,308 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:29:07,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_5.c [2021-01-06 10:29:07,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1f75e617e/791c77f3d8f84f9598a54989943cf0be/FLAG7d4a28789 [2021-01-06 10:29:08,181 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:29:08,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_5.c [2021-01-06 10:29:08,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1f75e617e/791c77f3d8f84f9598a54989943cf0be/FLAG7d4a28789 [2021-01-06 10:29:08,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1f75e617e/791c77f3d8f84f9598a54989943cf0be [2021-01-06 10:29:08,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:29:08,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:29:08,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:29:08,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:29:08,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:29:08,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:29:08" (1/1) ... [2021-01-06 10:29:08,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d2f3c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:08, skipping insertion in model container [2021-01-06 10:29:08,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:29:08" (1/1) ... [2021-01-06 10:29:08,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:29:08,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:29:08,741 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_5.c[323,336] 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 10:29:08,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:29:08,777 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:29:08,793 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_5.c[323,336] 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 10:29:08,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:29:08,821 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:29:08,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:08 WrapperNode [2021-01-06 10:29:08,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:29:08,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:29:08,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:29:08,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:29:08,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:08" (1/1) ... [2021-01-06 10:29:08,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:08" (1/1) ... [2021-01-06 10:29:08,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:29:08,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:29:08,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:29:08,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:29:08,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:08" (1/1) ... [2021-01-06 10:29:08,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:08" (1/1) ... [2021-01-06 10:29:08,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:08" (1/1) ... [2021-01-06 10:29:08,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:08" (1/1) ... [2021-01-06 10:29:08,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:08" (1/1) ... [2021-01-06 10:29:08,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:08" (1/1) ... [2021-01-06 10:29:08,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:08" (1/1) ... [2021-01-06 10:29:08,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:29:08,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:29:08,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:29:08,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:29:08,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:08" (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 10:29:09,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:29:09,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:29:09,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:29:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:29:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:29:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:29:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:29:09,442 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:29:09,442 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 10:29:09,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:29:09 BoogieIcfgContainer [2021-01-06 10:29:09,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:29:09,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:29:09,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:29:09,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:29:09,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:29:08" (1/3) ... [2021-01-06 10:29:09,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ba2ae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:29:09, skipping insertion in model container [2021-01-06 10:29:09,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:29:08" (2/3) ... [2021-01-06 10:29:09,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ba2ae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:29:09, skipping insertion in model container [2021-01-06 10:29:09,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:29:09" (3/3) ... [2021-01-06 10:29:09,460 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_5.c [2021-01-06 10:29:09,470 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:29:09,477 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:29:09,522 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:29:09,562 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:29:09,562 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:29:09,562 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:29:09,563 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:29:09,563 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:29:09,563 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:29:09,564 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:29:09,564 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:29:09,584 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 10:29:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:29:09,592 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:09,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:09,594 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2021-01-06 10:29:09,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:09,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028131579] [2021-01-06 10:29:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:09,921 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 10:29:09,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028131579] [2021-01-06 10:29:09,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:29:09,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:29:09,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415337168] [2021-01-06 10:29:09,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:29:09,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:09,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:29:09,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:29:09,969 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-01-06 10:29:09,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:09,996 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-01-06 10:29:09,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:29:09,998 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 10:29:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:10,026 INFO L225 Difference]: With dead ends: 29 [2021-01-06 10:29:10,029 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 10:29:10,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 10:29:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 10:29:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 10:29:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 10:29:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-01-06 10:29:10,092 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2021-01-06 10:29:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:10,093 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-01-06 10:29:10,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:29:10,093 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-01-06 10:29:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:29:10,096 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:10,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:10,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:29:10,099 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:10,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2021-01-06 10:29:10,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:10,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144151911] [2021-01-06 10:29:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:10,274 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 10:29:10,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144151911] [2021-01-06 10:29:10,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:29:10,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:29:10,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115068935] [2021-01-06 10:29:10,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:29:10,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:10,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:29:10,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:29:10,280 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2021-01-06 10:29:10,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:10,389 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-01-06 10:29:10,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:29:10,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-06 10:29:10,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:10,391 INFO L225 Difference]: With dead ends: 34 [2021-01-06 10:29:10,392 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 10:29:10,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 10:29:10,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 10:29:10,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-01-06 10:29:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 10:29:10,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-01-06 10:29:10,400 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2021-01-06 10:29:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:10,400 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-01-06 10:29:10,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:29:10,401 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-01-06 10:29:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:29:10,401 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:10,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:10,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:29:10,402 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:10,403 INFO L82 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2021-01-06 10:29:10,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:10,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349424211] [2021-01-06 10:29:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:10,519 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 10:29:10,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349424211] [2021-01-06 10:29:10,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876549719] [2021-01-06 10:29:10,521 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 10:29:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:10,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:29:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:10,749 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 10:29:10,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:10,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:29:10,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672480399] [2021-01-06 10:29:10,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:29:10,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:10,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:29:10,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:29:10,753 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2021-01-06 10:29:10,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:10,833 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-01-06 10:29:10,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:29:10,834 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 10:29:10,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:10,835 INFO L225 Difference]: With dead ends: 44 [2021-01-06 10:29:10,835 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:29:10,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:29:10,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:29:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2021-01-06 10:29:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:29:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-01-06 10:29:10,850 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-01-06 10:29:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:10,851 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-01-06 10:29:10,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:29:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-01-06 10:29:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:29:10,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:10,852 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:11,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:29:11,055 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:11,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:11,056 INFO L82 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2021-01-06 10:29:11,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:11,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710620050] [2021-01-06 10:29:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:29:11,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710620050] [2021-01-06 10:29:11,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093167177] [2021-01-06 10:29:11,158 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 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 10:29:11,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:29:11,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:11,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:29:11,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:11,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:29:11,368 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:29:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:29:11,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:11,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-01-06 10:29:11,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672790452] [2021-01-06 10:29:11,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:29:11,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:11,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:29:11,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:11,386 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2021-01-06 10:29:11,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:11,506 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-01-06 10:29:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:29:11,507 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 10:29:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:11,508 INFO L225 Difference]: With dead ends: 35 [2021-01-06 10:29:11,508 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:29:11,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:29:11,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:29:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-01-06 10:29:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:29:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-01-06 10:29:11,518 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2021-01-06 10:29:11,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:11,518 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-01-06 10:29:11,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:29:11,519 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-01-06 10:29:11,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:29:11,520 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:11,520 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:11,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:11,736 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:11,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2021-01-06 10:29:11,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:11,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764705079] [2021-01-06 10:29:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:29:11,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764705079] [2021-01-06 10:29:11,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709434035] [2021-01-06 10:29:11,808 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 10:29:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:11,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:29:11,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:29:11,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:11,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 10:29:11,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423385888] [2021-01-06 10:29:11,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:29:11,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:11,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:29:11,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:11,951 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2021-01-06 10:29:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:12,041 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2021-01-06 10:29:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:29:12,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2021-01-06 10:29:12,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:12,044 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:29:12,044 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 10:29:12,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:12,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 10:29:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2021-01-06 10:29:12,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:29:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 10:29:12,053 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2021-01-06 10:29:12,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:12,053 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 10:29:12,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:29:12,054 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 10:29:12,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 10:29:12,055 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:12,055 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:12,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:12,261 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:12,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2021-01-06 10:29:12,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:12,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678938264] [2021-01-06 10:29:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:29:12,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678938264] [2021-01-06 10:29:12,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721139534] [2021-01-06 10:29:12,395 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 10:29:12,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:12,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:12,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:29:12,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:29:12,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:12,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 10:29:12,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989050591] [2021-01-06 10:29:12,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:29:12,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:12,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:29:12,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:12,599 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2021-01-06 10:29:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:12,714 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2021-01-06 10:29:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:29:12,715 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2021-01-06 10:29:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:12,716 INFO L225 Difference]: With dead ends: 113 [2021-01-06 10:29:12,717 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 10:29:12,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 10:29:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2021-01-06 10:29:12,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:29:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-01-06 10:29:12,726 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2021-01-06 10:29:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:12,726 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-01-06 10:29:12,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:29:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-01-06 10:29:12,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:29:12,728 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:12,728 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:12,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:12,943 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:12,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:12,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2021-01-06 10:29:12,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:12,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655961428] [2021-01-06 10:29:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:29:13,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655961428] [2021-01-06 10:29:13,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198562061] [2021-01-06 10:29:13,102 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 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 10:29:13,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:29:13,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:13,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:29:13,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-01-06 10:29:13,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:13,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-01-06 10:29:13,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076005871] [2021-01-06 10:29:13,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:29:13,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:13,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:29:13,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:29:13,275 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2021-01-06 10:29:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:13,388 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2021-01-06 10:29:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:29:13,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2021-01-06 10:29:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:13,393 INFO L225 Difference]: With dead ends: 79 [2021-01-06 10:29:13,393 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 10:29:13,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:29:13,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 10:29:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2021-01-06 10:29:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:29:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-01-06 10:29:13,408 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2021-01-06 10:29:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:13,411 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-01-06 10:29:13,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:29:13,412 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-01-06 10:29:13,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:29:13,415 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:13,416 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:13,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:29:13,632 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:13,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:13,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2021-01-06 10:29:13,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:13,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791632878] [2021-01-06 10:29:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:13,653 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:13,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958870864] [2021-01-06 10:29:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:13,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:29:13,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:29:13,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791632878] [2021-01-06 10:29:13,922 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:13,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958870864] [2021-01-06 10:29:13,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:13,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:29:13,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484905025] [2021-01-06 10:29:13,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:29:13,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:13,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:29:13,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:13,932 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2021-01-06 10:29:14,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:14,100 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2021-01-06 10:29:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:29:14,101 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2021-01-06 10:29:14,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:14,103 INFO L225 Difference]: With dead ends: 157 [2021-01-06 10:29:14,103 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 10:29:14,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 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 10:29:14,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 10:29:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2021-01-06 10:29:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 10:29:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-01-06 10:29:14,114 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2021-01-06 10:29:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:14,114 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-01-06 10:29:14,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:29:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-01-06 10:29:14,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:29:14,116 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:14,116 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:14,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:14,331 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:14,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2021-01-06 10:29:14,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:14,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173235131] [2021-01-06 10:29:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:14,347 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:14,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006621923] [2021-01-06 10:29:14,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:14,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:14,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:14,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:29:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:29:14,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173235131] [2021-01-06 10:29:14,604 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:14,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006621923] [2021-01-06 10:29:14,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:14,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:29:14,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81151154] [2021-01-06 10:29:14,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:29:14,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:14,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:29:14,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:14,607 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2021-01-06 10:29:14,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:14,790 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2021-01-06 10:29:14,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:29:14,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2021-01-06 10:29:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:14,792 INFO L225 Difference]: With dead ends: 197 [2021-01-06 10:29:14,792 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 10:29:14,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 10:29:14,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2021-01-06 10:29:14,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:29:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-01-06 10:29:14,804 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2021-01-06 10:29:14,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:14,805 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-01-06 10:29:14,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:29:14,805 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-01-06 10:29:14,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:29:14,806 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:14,807 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:15,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:15,021 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:15,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:15,022 INFO L82 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2021-01-06 10:29:15,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:15,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588238768] [2021-01-06 10:29:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:15,048 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:15,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292779432] [2021-01-06 10:29:15,049 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 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 10:29:15,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:29:15,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:15,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:29:15,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 10:29:15,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588238768] [2021-01-06 10:29:15,269 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:15,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292779432] [2021-01-06 10:29:15,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:15,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:29:15,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805699049] [2021-01-06 10:29:15,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:29:15,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:15,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:29:15,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:29:15,272 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2021-01-06 10:29:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:15,403 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-01-06 10:29:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:29:15,404 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2021-01-06 10:29:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:15,405 INFO L225 Difference]: With dead ends: 60 [2021-01-06 10:29:15,405 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 10:29:15,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 10:29:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-01-06 10:29:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 10:29:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-01-06 10:29:15,414 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2021-01-06 10:29:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:15,415 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-01-06 10:29:15,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:29:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-01-06 10:29:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:29:15,417 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:15,417 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:15,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:29:15,631 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:15,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2021-01-06 10:29:15,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:15,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923332446] [2021-01-06 10:29:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:15,661 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:15,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847619375] [2021-01-06 10:29:15,662 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 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 10:29:15,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:15,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:15,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:29:15,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:29:16,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923332446] [2021-01-06 10:29:16,000 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:16,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847619375] [2021-01-06 10:29:16,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:16,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:29:16,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347403383] [2021-01-06 10:29:16,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:29:16,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:16,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:29:16,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:29:16,003 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2021-01-06 10:29:16,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:16,361 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2021-01-06 10:29:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:29:16,362 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2021-01-06 10:29:16,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:16,363 INFO L225 Difference]: With dead ends: 211 [2021-01-06 10:29:16,363 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 10:29:16,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=114, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:29:16,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 10:29:16,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2021-01-06 10:29:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:29:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-01-06 10:29:16,374 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2021-01-06 10:29:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:16,375 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-01-06 10:29:16,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:29:16,375 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-01-06 10:29:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:29:16,376 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:16,376 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:16,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:16,591 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:16,592 INFO L82 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2021-01-06 10:29:16,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:16,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165373090] [2021-01-06 10:29:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:16,607 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:16,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293289657] [2021-01-06 10:29:16,608 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 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 10:29:16,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:29:16,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:16,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:29:16,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:29:17,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165373090] [2021-01-06 10:29:17,128 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:17,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293289657] [2021-01-06 10:29:17,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:17,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:29:17,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551319579] [2021-01-06 10:29:17,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:29:17,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:17,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:29:17,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:29:17,131 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 14 states. [2021-01-06 10:29:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:17,380 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2021-01-06 10:29:17,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:29:17,381 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2021-01-06 10:29:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:17,384 INFO L225 Difference]: With dead ends: 314 [2021-01-06 10:29:17,384 INFO L226 Difference]: Without dead ends: 283 [2021-01-06 10:29:17,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 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 10:29:17,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-01-06 10:29:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2021-01-06 10:29:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 10:29:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-01-06 10:29:17,399 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2021-01-06 10:29:17,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:17,400 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-01-06 10:29:17,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:29:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-01-06 10:29:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:29:17,401 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:17,401 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:17,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:17,608 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:17,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:17,609 INFO L82 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2021-01-06 10:29:17,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:17,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419195028] [2021-01-06 10:29:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:17,627 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:17,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877939917] [2021-01-06 10:29:17,628 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 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 10:29:17,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:29:17,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:17,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:29:17,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 10:29:17,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419195028] [2021-01-06 10:29:17,929 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:17,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877939917] [2021-01-06 10:29:17,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:17,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:29:17,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256301267] [2021-01-06 10:29:17,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:29:17,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:17,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:29:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:17,932 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2021-01-06 10:29:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:18,072 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-01-06 10:29:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:29:18,073 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2021-01-06 10:29:18,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:18,074 INFO L225 Difference]: With dead ends: 77 [2021-01-06 10:29:18,074 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:29:18,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:29:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:29:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-01-06 10:29:18,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 10:29:18,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-01-06 10:29:18,086 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2021-01-06 10:29:18,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:18,086 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-01-06 10:29:18,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:29:18,087 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-01-06 10:29:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:29:18,090 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:18,090 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:18,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:29:18,292 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:18,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2021-01-06 10:29:18,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:18,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999232079] [2021-01-06 10:29:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:18,319 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:18,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154518978] [2021-01-06 10:29:18,320 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 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 10:29:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:18,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:29:18,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:29:18,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999232079] [2021-01-06 10:29:18,760 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:18,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154518978] [2021-01-06 10:29:18,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:18,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:29:18,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469586773] [2021-01-06 10:29:18,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:29:18,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:18,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:29:18,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:29:18,763 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 17 states. [2021-01-06 10:29:19,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:19,068 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2021-01-06 10:29:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:29:19,069 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2021-01-06 10:29:19,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:19,072 INFO L225 Difference]: With dead ends: 450 [2021-01-06 10:29:19,072 INFO L226 Difference]: Without dead ends: 414 [2021-01-06 10:29:19,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 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 10:29:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-01-06 10:29:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2021-01-06 10:29:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 10:29:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-01-06 10:29:19,087 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2021-01-06 10:29:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:19,087 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-01-06 10:29:19,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:29:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-01-06 10:29:19,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 10:29:19,089 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:19,089 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:19,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:29:19,303 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:19,304 INFO L82 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2021-01-06 10:29:19,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:19,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611925805] [2021-01-06 10:29:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:19,326 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:19,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797352939] [2021-01-06 10:29:19,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:19,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:19,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:19,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:29:19,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:29:19,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611925805] [2021-01-06 10:29:19,888 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:19,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797352939] [2021-01-06 10:29:19,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:19,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 10:29:19,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881700468] [2021-01-06 10:29:19,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:29:19,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:19,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:29:19,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:29:19,891 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 20 states. [2021-01-06 10:29:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:20,272 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2021-01-06 10:29:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:29:20,273 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2021-01-06 10:29:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:20,276 INFO L225 Difference]: With dead ends: 540 [2021-01-06 10:29:20,277 INFO L226 Difference]: Without dead ends: 504 [2021-01-06 10:29:20,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 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 10:29:20,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-01-06 10:29:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2021-01-06 10:29:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:29:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-01-06 10:29:20,291 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2021-01-06 10:29:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:20,292 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-01-06 10:29:20,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:29:20,292 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-01-06 10:29:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 10:29:20,293 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:20,293 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:20,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:29:20,507 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2021-01-06 10:29:20,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:20,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203365957] [2021-01-06 10:29:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:20,536 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:20,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735689702] [2021-01-06 10:29:20,537 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 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 10:29:20,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:29:20,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:20,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:29:20,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:29:20,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203365957] [2021-01-06 10:29:20,936 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:20,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735689702] [2021-01-06 10:29:20,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:20,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:29:20,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957555742] [2021-01-06 10:29:20,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:29:20,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:20,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:29:20,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:29:20,939 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 10 states. [2021-01-06 10:29:21,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:21,114 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-01-06 10:29:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:29:21,114 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2021-01-06 10:29:21,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:21,115 INFO L225 Difference]: With dead ends: 100 [2021-01-06 10:29:21,116 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 10:29:21,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:29:21,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 10:29:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-01-06 10:29:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 10:29:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-01-06 10:29:21,126 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2021-01-06 10:29:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:21,126 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-01-06 10:29:21,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:29:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-01-06 10:29:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:29:21,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:21,128 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:21,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:21,332 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:21,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:21,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2021-01-06 10:29:21,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:21,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123596237] [2021-01-06 10:29:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:21,356 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:21,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157315123] [2021-01-06 10:29:21,357 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 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 10:29:21,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:21,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:21,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:29:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 508 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:29:22,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123596237] [2021-01-06 10:29:22,020 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:22,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157315123] [2021-01-06 10:29:22,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:22,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 10:29:22,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219957870] [2021-01-06 10:29:22,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:29:22,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:22,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:29:22,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:29:22,024 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2021-01-06 10:29:22,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:22,886 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2021-01-06 10:29:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:29:22,886 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2021-01-06 10:29:22,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:22,890 INFO L225 Difference]: With dead ends: 580 [2021-01-06 10:29:22,890 INFO L226 Difference]: Without dead ends: 547 [2021-01-06 10:29:22,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:29:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-01-06 10:29:22,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2021-01-06 10:29:22,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:29:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-01-06 10:29:22,904 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2021-01-06 10:29:22,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:22,904 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-01-06 10:29:22,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:29:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-01-06 10:29:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:29:22,905 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:22,905 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:23,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:29:23,116 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2021-01-06 10:29:23,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:23,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870025427] [2021-01-06 10:29:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:23,136 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:23,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286092569] [2021-01-06 10:29:23,137 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 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 10:29:24,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-01-06 10:29:24,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:24,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:29:24,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:29:24,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870025427] [2021-01-06 10:29:24,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:24,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286092569] [2021-01-06 10:29:24,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:24,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 10:29:24,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84157062] [2021-01-06 10:29:24,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:29:24,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:24,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:29:24,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:29:24,668 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 24 states. [2021-01-06 10:29:25,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:25,195 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2021-01-06 10:29:25,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:29:25,197 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2021-01-06 10:29:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:25,200 INFO L225 Difference]: With dead ends: 757 [2021-01-06 10:29:25,201 INFO L226 Difference]: Without dead ends: 713 [2021-01-06 10:29:25,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 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 10:29:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-01-06 10:29:25,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2021-01-06 10:29:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:29:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-01-06 10:29:25,218 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2021-01-06 10:29:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:25,219 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-01-06 10:29:25,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:29:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-01-06 10:29:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:29:25,220 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:25,220 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:25,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:29:25,428 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:25,429 INFO L82 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2021-01-06 10:29:25,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:25,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053270160] [2021-01-06 10:29:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:25,469 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:25,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810707035] [2021-01-06 10:29:25,470 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 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 10:29:25,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:29:25,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:25,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:29:25,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-01-06 10:29:25,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053270160] [2021-01-06 10:29:25,988 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:25,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810707035] [2021-01-06 10:29:25,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:25,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:29:25,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533291941] [2021-01-06 10:29:25,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:29:25,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:25,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:29:25,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:25,991 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 11 states. [2021-01-06 10:29:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:26,176 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-01-06 10:29:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:29:26,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2021-01-06 10:29:26,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:26,180 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:29:26,181 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 10:29:26,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:29:26,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 10:29:26,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2021-01-06 10:29:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 10:29:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2021-01-06 10:29:26,195 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2021-01-06 10:29:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:26,195 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2021-01-06 10:29:26,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:29:26,196 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2021-01-06 10:29:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:29:26,197 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:26,197 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:26,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:26,411 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:26,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:26,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2021-01-06 10:29:26,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:26,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575380973] [2021-01-06 10:29:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:26,445 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:26,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023714786] [2021-01-06 10:29:26,446 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 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 10:29:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:26,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:29:26,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:29:27,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575380973] [2021-01-06 10:29:27,332 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:27,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023714786] [2021-01-06 10:29:27,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:27,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-01-06 10:29:27,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370450816] [2021-01-06 10:29:27,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:29:27,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:27,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:29:27,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:29:27,334 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 28 states. [2021-01-06 10:29:27,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:27,965 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2021-01-06 10:29:27,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:29:27,966 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2021-01-06 10:29:27,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:27,971 INFO L225 Difference]: With dead ends: 1003 [2021-01-06 10:29:27,971 INFO L226 Difference]: Without dead ends: 954 [2021-01-06 10:29:27,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:29:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-01-06 10:29:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2021-01-06 10:29:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 10:29:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-01-06 10:29:27,992 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2021-01-06 10:29:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:27,992 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-01-06 10:29:27,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:29:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-01-06 10:29:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 10:29:27,993 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:27,994 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:28,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:28,208 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:28,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2021-01-06 10:29:28,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:28,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851791565] [2021-01-06 10:29:28,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:28,236 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:28,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799658638] [2021-01-06 10:29:28,236 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 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 10:29:28,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:28,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:28,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:29:28,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:29:29,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851791565] [2021-01-06 10:29:29,327 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:29,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799658638] [2021-01-06 10:29:29,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:29,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-01-06 10:29:29,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539537223] [2021-01-06 10:29:29,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:29:29,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:29,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:29:29,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:29:29,330 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 32 states. [2021-01-06 10:29:30,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:30,030 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2021-01-06 10:29:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:29:30,031 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2021-01-06 10:29:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:30,036 INFO L225 Difference]: With dead ends: 1163 [2021-01-06 10:29:30,036 INFO L226 Difference]: Without dead ends: 1114 [2021-01-06 10:29:30,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:29:30,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-01-06 10:29:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2021-01-06 10:29:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 10:29:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2021-01-06 10:29:30,057 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2021-01-06 10:29:30,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:30,058 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2021-01-06 10:29:30,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:29:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2021-01-06 10:29:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 10:29:30,059 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:30,059 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:30,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:30,272 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:30,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2021-01-06 10:29:30,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:30,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782704354] [2021-01-06 10:29:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:30,296 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:30,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587005449] [2021-01-06 10:29:30,297 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 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 10:29:30,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:29:30,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:30,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:29:30,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-01-06 10:29:30,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782704354] [2021-01-06 10:29:30,817 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:30,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587005449] [2021-01-06 10:29:30,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:30,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:29:30,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972557288] [2021-01-06 10:29:30,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:29:30,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:30,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:29:30,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:29:30,819 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 12 states. [2021-01-06 10:29:31,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:31,031 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-01-06 10:29:31,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:29:31,035 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2021-01-06 10:29:31,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:31,036 INFO L225 Difference]: With dead ends: 149 [2021-01-06 10:29:31,036 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 10:29:31,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:29:31,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 10:29:31,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2021-01-06 10:29:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 10:29:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2021-01-06 10:29:31,053 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2021-01-06 10:29:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:31,053 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2021-01-06 10:29:31,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:29:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2021-01-06 10:29:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:29:31,055 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:31,055 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:31,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:29:31,271 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:31,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:31,272 INFO L82 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2021-01-06 10:29:31,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:31,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117403773] [2021-01-06 10:29:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:31,297 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:31,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757197170] [2021-01-06 10:29:31,298 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 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 10:29:31,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:31,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:31,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:29:31,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1476 proven. 44 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-01-06 10:29:32,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117403773] [2021-01-06 10:29:32,522 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:32,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757197170] [2021-01-06 10:29:32,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:32,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-01-06 10:29:32,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431749414] [2021-01-06 10:29:32,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:29:32,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:32,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:29:32,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:29:32,525 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 36 states. [2021-01-06 10:29:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:33,948 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2021-01-06 10:29:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:29:33,949 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2021-01-06 10:29:33,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:33,955 INFO L225 Difference]: With dead ends: 1247 [2021-01-06 10:29:33,956 INFO L226 Difference]: Without dead ends: 1204 [2021-01-06 10:29:33,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=854, Invalid=952, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:29:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-01-06 10:29:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2021-01-06 10:29:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 10:29:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2021-01-06 10:29:33,979 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2021-01-06 10:29:33,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:33,980 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2021-01-06 10:29:33,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:29:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2021-01-06 10:29:33,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 10:29:33,981 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:33,981 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:34,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:29:34,195 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:34,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:34,196 INFO L82 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2021-01-06 10:29:34,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:34,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094549795] [2021-01-06 10:29:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:34,222 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:34,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660566754] [2021-01-06 10:29:34,222 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 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 10:29:45,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-01-06 10:29:45,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:45,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:29:45,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-01-06 10:29:46,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094549795] [2021-01-06 10:29:46,272 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:46,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660566754] [2021-01-06 10:29:46,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:46,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-01-06 10:29:46,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389279097] [2021-01-06 10:29:46,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:29:46,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:46,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:29:46,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:29:46,276 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 37 states. [2021-01-06 10:29:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:47,174 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2021-01-06 10:29:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:29:47,175 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2021-01-06 10:29:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:47,181 INFO L225 Difference]: With dead ends: 1515 [2021-01-06 10:29:47,182 INFO L226 Difference]: Without dead ends: 1458 [2021-01-06 10:29:47,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:29:47,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-01-06 10:29:47,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2021-01-06 10:29:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 10:29:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2021-01-06 10:29:47,214 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2021-01-06 10:29:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:47,214 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2021-01-06 10:29:47,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:29:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2021-01-06 10:29:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-01-06 10:29:47,216 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:47,216 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:47,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:47,418 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:47,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:47,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2021-01-06 10:29:47,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:47,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069483454] [2021-01-06 10:29:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:47,453 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:47,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352785126] [2021-01-06 10:29:47,453 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 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 10:29:48,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:29:48,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:48,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:29:48,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2021-01-06 10:29:48,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069483454] [2021-01-06 10:29:48,667 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:48,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352785126] [2021-01-06 10:29:48,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:48,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:29:48,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766306924] [2021-01-06 10:29:48,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:29:48,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:48,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:29:48,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:29:48,668 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2021-01-06 10:29:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:48,916 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2021-01-06 10:29:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:29:48,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2021-01-06 10:29:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:48,918 INFO L225 Difference]: With dead ends: 172 [2021-01-06 10:29:48,919 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 10:29:48,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:29:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 10:29:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-01-06 10:29:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 10:29:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2021-01-06 10:29:48,941 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2021-01-06 10:29:48,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:48,941 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2021-01-06 10:29:48,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:29:48,942 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2021-01-06 10:29:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-01-06 10:29:48,943 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:48,943 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:49,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:29:49,149 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:49,150 INFO L82 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2021-01-06 10:29:49,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:49,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711053651] [2021-01-06 10:29:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:49,186 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:49,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352819911] [2021-01-06 10:29:49,187 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 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 10:29:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:49,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 10:29:49,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:29:50,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711053651] [2021-01-06 10:29:50,793 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:50,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352819911] [2021-01-06 10:29:50,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:50,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-01-06 10:29:50,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020076133] [2021-01-06 10:29:50,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 10:29:50,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:50,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 10:29:50,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:29:50,796 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 42 states. [2021-01-06 10:29:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:51,916 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2021-01-06 10:29:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:29:51,917 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2021-01-06 10:29:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:51,923 INFO L225 Difference]: With dead ends: 1906 [2021-01-06 10:29:51,923 INFO L226 Difference]: Without dead ends: 1844 [2021-01-06 10:29:51,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:29:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-01-06 10:29:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2021-01-06 10:29:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 10:29:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2021-01-06 10:29:51,959 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2021-01-06 10:29:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:51,959 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2021-01-06 10:29:51,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 10:29:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2021-01-06 10:29:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-01-06 10:29:51,961 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:51,961 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:52,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:52,176 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:52,177 INFO L82 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2021-01-06 10:29:52,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:52,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209418598] [2021-01-06 10:29:52,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:52,202 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:52,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222880236] [2021-01-06 10:29:52,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:52,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:52,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:52,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 10:29:52,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:29:54,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209418598] [2021-01-06 10:29:54,322 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:54,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222880236] [2021-01-06 10:29:54,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:54,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-01-06 10:29:54,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862267893] [2021-01-06 10:29:54,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:29:54,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:54,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:29:54,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:29:54,325 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 47 states. [2021-01-06 10:29:55,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:55,725 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2021-01-06 10:29:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:29:55,728 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 173 [2021-01-06 10:29:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:55,737 INFO L225 Difference]: With dead ends: 2156 [2021-01-06 10:29:55,737 INFO L226 Difference]: Without dead ends: 2094 [2021-01-06 10:29:55,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:29:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-01-06 10:29:55,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2021-01-06 10:29:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 10:29:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2021-01-06 10:29:55,781 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2021-01-06 10:29:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:55,781 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2021-01-06 10:29:55,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:29:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2021-01-06 10:29:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-01-06 10:29:55,784 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:55,784 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:55,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:29:56,000 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:56,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:56,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2021-01-06 10:29:56,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:56,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543194250] [2021-01-06 10:29:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:56,033 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:56,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887683227] [2021-01-06 10:29:56,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:56,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:29:56,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:56,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:29:56,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3565 backedges. 611 proven. 26 refuted. 0 times theorem prover too weak. 2928 trivial. 0 not checked. [2021-01-06 10:29:57,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543194250] [2021-01-06 10:29:57,070 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:57,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887683227] [2021-01-06 10:29:57,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:57,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:29:57,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450473416] [2021-01-06 10:29:57,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:29:57,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:57,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:29:57,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:57,072 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 9 states. [2021-01-06 10:29:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:57,295 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2021-01-06 10:29:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:29:57,297 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2021-01-06 10:29:57,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:57,299 INFO L225 Difference]: With dead ends: 371 [2021-01-06 10:29:57,299 INFO L226 Difference]: Without dead ends: 323 [2021-01-06 10:29:57,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 180 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 10:29:57,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-01-06 10:29:57,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2021-01-06 10:29:57,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-01-06 10:29:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2021-01-06 10:29:57,324 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2021-01-06 10:29:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:57,325 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2021-01-06 10:29:57,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:29:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2021-01-06 10:29:57,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-01-06 10:29:57,327 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:57,327 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:57,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:29:57,533 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:57,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2021-01-06 10:29:57,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:57,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778668370] [2021-01-06 10:29:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:57,564 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:57,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039923358] [2021-01-06 10:29:57,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:57,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:57,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:57,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 10:29:57,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 3493 proven. 84 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:30:00,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778668370] [2021-01-06 10:30:00,140 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:30:00,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039923358] [2021-01-06 10:30:00,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:30:00,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2021-01-06 10:30:00,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126001295] [2021-01-06 10:30:00,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 10:30:00,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:00,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 10:30:00,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:30:00,145 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 53 states. [2021-01-06 10:30:04,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:04,779 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2021-01-06 10:30:04,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 10:30:04,780 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2021-01-06 10:30:04,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:04,790 INFO L225 Difference]: With dead ends: 2137 [2021-01-06 10:30:04,791 INFO L226 Difference]: Without dead ends: 2089 [2021-01-06 10:30:04,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 10:30:04,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-01-06 10:30:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2021-01-06 10:30:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-01-06 10:30:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2021-01-06 10:30:04,841 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2021-01-06 10:30:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:04,842 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2021-01-06 10:30:04,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 10:30:04,842 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2021-01-06 10:30:04,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-01-06 10:30:04,843 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:04,843 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:05,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:30:05,058 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:05,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2021-01-06 10:30:05,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:05,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033957540] [2021-01-06 10:30:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:05,088 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:30:05,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763505587] [2021-01-06 10:30:05,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true