/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-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:38:01,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:38:01,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:38:01,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:38:01,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:38:01,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:38:01,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:38:01,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:38:01,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:38:01,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:38:01,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:38:01,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:38:01,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:38:01,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:38:01,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:38:01,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:38:01,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:38:01,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:38:01,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:38:01,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:38:01,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:38:01,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:38:01,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:38:01,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:38:01,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:38:01,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:38:01,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:38:01,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:38:01,886 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 09:38:01,913 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:38:01,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:38:01,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:38:01,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:38:01,916 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:38:01,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:38:01,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:38:01,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:38:01,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:38:01,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:38:01,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:38:01,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:38:01,918 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:38:01,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:38:01,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:38:01,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:38:01,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:38:01,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:38:01,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:38:01,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:38:01,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:38:01,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:38:01,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:38:01,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:38:01,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:38:01,920 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:38:02,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:38:02,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:38:02,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:38:02,337 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:38:02,338 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:38:02,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2021-01-06 09:38:02,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e00d6d2c2/6203fcbb8f7849fc8592fd833a54f15e/FLAGff99328c4 [2021-01-06 09:38:03,201 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:38:03,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2021-01-06 09:38:03,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e00d6d2c2/6203fcbb8f7849fc8592fd833a54f15e/FLAGff99328c4 [2021-01-06 09:38:03,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e00d6d2c2/6203fcbb8f7849fc8592fd833a54f15e [2021-01-06 09:38:03,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:38:03,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:38:03,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:38:03,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:38:03,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:38:03,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:38:03" (1/1) ... [2021-01-06 09:38:03,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@404ee9a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:38:03, skipping insertion in model container [2021-01-06 09:38:03,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:38:03" (1/1) ... [2021-01-06 09:38:03,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:38:03,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:38:03,737 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-examples/standard_allDiff2_ground.i[817,830] 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: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 09:38:03,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:38:03,768 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:38:03,782 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-examples/standard_allDiff2_ground.i[817,830] 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: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 09:38:03,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:38:03,815 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:38:03,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:38:03 WrapperNode [2021-01-06 09:38:03,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:38:03,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:38:03,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:38:03,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:38:03,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:38:03" (1/1) ... [2021-01-06 09:38:03,836 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:38:03" (1/1) ... [2021-01-06 09:38:03,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:38:03,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:38:03,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:38:03,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:38:03,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:38:03" (1/1) ... [2021-01-06 09:38:03,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:38:03" (1/1) ... [2021-01-06 09:38:03,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:38:03" (1/1) ... [2021-01-06 09:38:03,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:38:03" (1/1) ... [2021-01-06 09:38:03,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:38:03" (1/1) ... [2021-01-06 09:38:03,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:38:03" (1/1) ... [2021-01-06 09:38:03,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:38:03" (1/1) ... [2021-01-06 09:38:03,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:38:03,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:38:03,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:38:03,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:38:03,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:38:03" (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 09:38:04,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:38:04,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:38:04,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:38:04,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:38:04,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:38:04,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:38:04,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:38:04,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:38:04,396 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 09:38:04,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:38:04 BoogieIcfgContainer [2021-01-06 09:38:04,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:38:04,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:38:04,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:38:04,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:38:04,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:38:03" (1/3) ... [2021-01-06 09:38:04,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e3b79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:38:04, skipping insertion in model container [2021-01-06 09:38:04,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:38:03" (2/3) ... [2021-01-06 09:38:04,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e3b79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:38:04, skipping insertion in model container [2021-01-06 09:38:04,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:38:04" (3/3) ... [2021-01-06 09:38:04,434 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2021-01-06 09:38:04,468 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:38:04,478 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:38:04,502 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:38:04,530 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:38:04,530 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:38:04,530 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:38:04,531 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:38:04,531 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:38:04,531 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:38:04,531 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:38:04,531 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:38:04,546 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 09:38:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 09:38:04,553 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:04,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:04,554 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:04,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:04,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1932701392, now seen corresponding path program 1 times [2021-01-06 09:38:04,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:04,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743098516] [2021-01-06 09:38:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:04,750 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 09:38:04,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743098516] [2021-01-06 09:38:04,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:38:04,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:38:04,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982874923] [2021-01-06 09:38:04,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:38:04,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:04,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:38:04,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:38:04,778 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2021-01-06 09:38:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:04,823 INFO L93 Difference]: Finished difference Result 44 states and 68 transitions. [2021-01-06 09:38:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:38:04,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 09:38:04,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:04,835 INFO L225 Difference]: With dead ends: 44 [2021-01-06 09:38:04,835 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 09:38:04,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:38:04,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 09:38:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-01-06 09:38:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 09:38:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-01-06 09:38:04,884 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2021-01-06 09:38:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:04,885 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-01-06 09:38:04,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:38:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-01-06 09:38:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 09:38:04,888 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:04,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:04,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:38:04,890 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:04,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:04,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1277503826, now seen corresponding path program 1 times [2021-01-06 09:38:04,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:04,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089884247] [2021-01-06 09:38:04,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:05,006 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 09:38:05,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089884247] [2021-01-06 09:38:05,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106856099] [2021-01-06 09:38:05,009 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 09:38:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:05,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:38:05,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:38:05,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:38:05,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-01-06 09:38:05,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981589282] [2021-01-06 09:38:05,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 09:38:05,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:05,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 09:38:05,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:38:05,152 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2021-01-06 09:38:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:05,200 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-01-06 09:38:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:38:05,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-01-06 09:38:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:05,201 INFO L225 Difference]: With dead ends: 35 [2021-01-06 09:38:05,201 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 09:38:05,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:38:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 09:38:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-01-06 09:38:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 09:38:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-01-06 09:38:05,208 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-01-06 09:38:05,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:05,209 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-01-06 09:38:05,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 09:38:05,209 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-01-06 09:38:05,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 09:38:05,210 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:05,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:05,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:38:05,425 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:05,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1548598205, now seen corresponding path program 1 times [2021-01-06 09:38:05,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:05,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397171863] [2021-01-06 09:38:05,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:38:05,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397171863] [2021-01-06 09:38:05,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610838249] [2021-01-06 09:38:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:05,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:38:05,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:38:05,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:05,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:38:05,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718717110] [2021-01-06 09:38:05,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:38:05,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:05,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:38:05,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:38:05,552 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2021-01-06 09:38:05,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:05,593 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-01-06 09:38:05,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:38:05,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-06 09:38:05,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:05,595 INFO L225 Difference]: With dead ends: 44 [2021-01-06 09:38:05,595 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 09:38:05,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:38:05,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 09:38:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-01-06 09:38:05,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 09:38:05,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-01-06 09:38:05,602 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2021-01-06 09:38:05,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:05,602 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-01-06 09:38:05,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:38:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-01-06 09:38:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 09:38:05,604 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:05,604 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:05,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:05,815 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:05,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:05,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1470988923, now seen corresponding path program 2 times [2021-01-06 09:38:05,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:05,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753490204] [2021-01-06 09:38:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:38:05,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753490204] [2021-01-06 09:38:05,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:38:05,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 09:38:05,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301436356] [2021-01-06 09:38:05,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 09:38:05,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:05,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 09:38:05,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 09:38:05,889 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 4 states. [2021-01-06 09:38:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:05,939 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-01-06 09:38:05,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:38:05,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-01-06 09:38:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:05,942 INFO L225 Difference]: With dead ends: 42 [2021-01-06 09:38:05,942 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 09:38:05,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 09:38:05,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 09:38:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-01-06 09:38:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:38:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-01-06 09:38:05,954 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2021-01-06 09:38:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:05,954 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-01-06 09:38:05,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 09:38:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-01-06 09:38:05,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 09:38:05,956 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:05,956 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:05,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 09:38:05,957 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:05,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:05,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1546796147, now seen corresponding path program 1 times [2021-01-06 09:38:05,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:05,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498714411] [2021-01-06 09:38:05,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:38:06,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498714411] [2021-01-06 09:38:06,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081003395] [2021-01-06 09:38:06,123 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 09:38:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:06,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:38:06,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:38:06,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:06,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-01-06 09:38:06,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270766336] [2021-01-06 09:38:06,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:38:06,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:06,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:38:06,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:38:06,273 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 10 states. [2021-01-06 09:38:06,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:06,412 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2021-01-06 09:38:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:38:06,413 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2021-01-06 09:38:06,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:06,414 INFO L225 Difference]: With dead ends: 53 [2021-01-06 09:38:06,415 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 09:38:06,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:38:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 09:38:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2021-01-06 09:38:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 09:38:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-01-06 09:38:06,430 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2021-01-06 09:38:06,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:06,432 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-01-06 09:38:06,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:38:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-01-06 09:38:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 09:38:06,433 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:06,433 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:06,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:06,647 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1858460768, now seen corresponding path program 2 times [2021-01-06 09:38:06,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:06,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529777287] [2021-01-06 09:38:06,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 09:38:06,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529777287] [2021-01-06 09:38:06,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94694635] [2021-01-06 09:38:06,711 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 09:38:06,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:06,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:06,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:38:06,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 09:38:06,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:06,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:38:06,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182178749] [2021-01-06 09:38:06,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:38:06,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:06,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:38:06,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:38:06,854 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 7 states. [2021-01-06 09:38:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:06,926 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2021-01-06 09:38:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:38:06,929 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2021-01-06 09:38:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:06,930 INFO L225 Difference]: With dead ends: 74 [2021-01-06 09:38:06,930 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 09:38:06,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:38:06,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 09:38:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2021-01-06 09:38:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 09:38:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-01-06 09:38:06,936 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 25 [2021-01-06 09:38:06,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:06,936 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-01-06 09:38:06,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:38:06,936 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-01-06 09:38:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 09:38:06,940 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:06,940 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:07,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:07,141 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:07,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:07,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1667419550, now seen corresponding path program 3 times [2021-01-06 09:38:07,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:07,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342504191] [2021-01-06 09:38:07,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 09:38:07,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342504191] [2021-01-06 09:38:07,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364926648] [2021-01-06 09:38:07,240 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 09:38:07,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:38:07,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:07,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:38:07,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-01-06 09:38:07,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:07,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-01-06 09:38:07,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702685696] [2021-01-06 09:38:07,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:38:07,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:38:07,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:38:07,391 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 8 states. [2021-01-06 09:38:07,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:07,511 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2021-01-06 09:38:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:38:07,511 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2021-01-06 09:38:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:07,517 INFO L225 Difference]: With dead ends: 74 [2021-01-06 09:38:07,517 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 09:38:07,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:38:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 09:38:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-01-06 09:38:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 09:38:07,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-01-06 09:38:07,537 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 27 [2021-01-06 09:38:07,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:07,538 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-01-06 09:38:07,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:38:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-01-06 09:38:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 09:38:07,540 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:07,540 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:07,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 09:38:07,755 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:07,756 INFO L82 PathProgramCache]: Analyzing trace with hash -751854596, now seen corresponding path program 4 times [2021-01-06 09:38:07,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:07,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305093493] [2021-01-06 09:38:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 09:38:07,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305093493] [2021-01-06 09:38:07,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964363523] [2021-01-06 09:38:07,832 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 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 09:38:07,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:07,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:07,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:38:07,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 09:38:07,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:07,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:38:07,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741921541] [2021-01-06 09:38:07,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:38:07,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:07,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:38:07,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:38:07,960 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 9 states. [2021-01-06 09:38:08,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:08,044 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2021-01-06 09:38:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:38:08,044 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2021-01-06 09:38:08,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:08,045 INFO L225 Difference]: With dead ends: 98 [2021-01-06 09:38:08,045 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 09:38:08,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:38:08,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 09:38:08,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2021-01-06 09:38:08,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 09:38:08,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2021-01-06 09:38:08,052 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 35 [2021-01-06 09:38:08,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:08,053 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2021-01-06 09:38:08,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:38:08,053 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2021-01-06 09:38:08,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 09:38:08,054 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:08,054 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:08,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:08,271 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:08,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:08,272 INFO L82 PathProgramCache]: Analyzing trace with hash 276207546, now seen corresponding path program 5 times [2021-01-06 09:38:08,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:08,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463307175] [2021-01-06 09:38:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 09:38:08,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463307175] [2021-01-06 09:38:08,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52342709] [2021-01-06 09:38:08,389 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 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 09:38:08,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 09:38:08,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:08,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:38:08,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:38:08,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:08,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 09:38:08,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925654462] [2021-01-06 09:38:08,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:38:08,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:08,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:38:08,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:38:08,622 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 16 states. [2021-01-06 09:38:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:09,209 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2021-01-06 09:38:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:38:09,210 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2021-01-06 09:38:09,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:09,210 INFO L225 Difference]: With dead ends: 108 [2021-01-06 09:38:09,211 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 09:38:09,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 09:38:09,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 09:38:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2021-01-06 09:38:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 09:38:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2021-01-06 09:38:09,221 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 37 [2021-01-06 09:38:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:09,222 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2021-01-06 09:38:09,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:38:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2021-01-06 09:38:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 09:38:09,224 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:09,224 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:09,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:09,438 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash 611906722, now seen corresponding path program 6 times [2021-01-06 09:38:09,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:09,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638242811] [2021-01-06 09:38:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-01-06 09:38:09,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638242811] [2021-01-06 09:38:09,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157023993] [2021-01-06 09:38:09,596 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 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 09:38:09,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 09:38:09,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:38:09,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 48 proven. 5 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-01-06 09:38:09,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:09,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-01-06 09:38:09,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180042259] [2021-01-06 09:38:09,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:38:09,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:09,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:38:09,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:38:09,771 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 14 states. [2021-01-06 09:38:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:10,197 INFO L93 Difference]: Finished difference Result 142 states and 186 transitions. [2021-01-06 09:38:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:38:10,198 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2021-01-06 09:38:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:10,199 INFO L225 Difference]: With dead ends: 142 [2021-01-06 09:38:10,199 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 09:38:10,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:38:10,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 09:38:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2021-01-06 09:38:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 09:38:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-01-06 09:38:10,219 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 54 [2021-01-06 09:38:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:10,219 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-01-06 09:38:10,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:38:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-01-06 09:38:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 09:38:10,228 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:10,228 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:10,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 09:38:10,430 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:10,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:10,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1429837393, now seen corresponding path program 7 times [2021-01-06 09:38:10,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:10,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783126120] [2021-01-06 09:38:10,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 09:38:10,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783126120] [2021-01-06 09:38:10,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245275763] [2021-01-06 09:38:10,571 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 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 09:38:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:10,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:38:10,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 09:38:10,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:10,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:38:10,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264938767] [2021-01-06 09:38:10,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:38:10,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:10,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:38:10,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:38:10,768 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand 12 states. [2021-01-06 09:38:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:10,887 INFO L93 Difference]: Finished difference Result 148 states and 188 transitions. [2021-01-06 09:38:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:38:10,888 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2021-01-06 09:38:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:10,889 INFO L225 Difference]: With dead ends: 148 [2021-01-06 09:38:10,889 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 09:38:10,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:38:10,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 09:38:10,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 74. [2021-01-06 09:38:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 09:38:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-01-06 09:38:10,900 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 68 [2021-01-06 09:38:10,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:10,901 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-01-06 09:38:10,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:38:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-01-06 09:38:10,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 09:38:10,902 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:10,902 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:11,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:11,118 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:11,119 INFO L82 PathProgramCache]: Analyzing trace with hash 824073649, now seen corresponding path program 8 times [2021-01-06 09:38:11,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:11,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297751684] [2021-01-06 09:38:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 09:38:11,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297751684] [2021-01-06 09:38:11,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307131379] [2021-01-06 09:38:11,263 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 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 09:38:11,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:11,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:11,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:38:11,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 09:38:11,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:11,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:38:11,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773722690] [2021-01-06 09:38:11,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:38:11,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:11,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:38:11,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:38:11,457 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 13 states. [2021-01-06 09:38:11,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:11,581 INFO L93 Difference]: Finished difference Result 165 states and 209 transitions. [2021-01-06 09:38:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:38:11,581 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2021-01-06 09:38:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:11,582 INFO L225 Difference]: With dead ends: 165 [2021-01-06 09:38:11,582 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 09:38:11,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:38:11,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 09:38:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 76. [2021-01-06 09:38:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 09:38:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2021-01-06 09:38:11,594 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 70 [2021-01-06 09:38:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:11,594 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2021-01-06 09:38:11,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:38:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2021-01-06 09:38:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 09:38:11,595 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:11,595 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:11,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:11,810 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:11,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:11,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2125899469, now seen corresponding path program 9 times [2021-01-06 09:38:11,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:11,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060033718] [2021-01-06 09:38:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 09:38:12,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060033718] [2021-01-06 09:38:12,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802235122] [2021-01-06 09:38:12,035 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 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 09:38:12,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 09:38:12,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:12,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:38:12,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:12,225 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:12,248 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:12,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:12,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-01-06 09:38:12,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:12,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-01-06 09:38:12,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102775898] [2021-01-06 09:38:12,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:38:12,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:12,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:38:12,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:12,300 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 18 states. [2021-01-06 09:38:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:13,420 INFO L93 Difference]: Finished difference Result 416 states and 574 transitions. [2021-01-06 09:38:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 09:38:13,420 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2021-01-06 09:38:13,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:13,424 INFO L225 Difference]: With dead ends: 416 [2021-01-06 09:38:13,424 INFO L226 Difference]: Without dead ends: 354 [2021-01-06 09:38:13,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=961, Invalid=3071, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 09:38:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-01-06 09:38:13,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 123. [2021-01-06 09:38:13,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-01-06 09:38:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 164 transitions. [2021-01-06 09:38:13,449 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 164 transitions. Word has length 72 [2021-01-06 09:38:13,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:13,450 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 164 transitions. [2021-01-06 09:38:13,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:38:13,450 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 164 transitions. [2021-01-06 09:38:13,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-01-06 09:38:13,451 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:13,452 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:13,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:38:13,666 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:13,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:13,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1439444272, now seen corresponding path program 10 times [2021-01-06 09:38:13,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:13,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788419718] [2021-01-06 09:38:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2021-01-06 09:38:13,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788419718] [2021-01-06 09:38:13,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216630153] [2021-01-06 09:38:13,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:13,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:13,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:13,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:38:13,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2021-01-06 09:38:14,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:14,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:38:14,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88201211] [2021-01-06 09:38:14,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:38:14,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:14,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:38:14,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:38:14,097 INFO L87 Difference]: Start difference. First operand 123 states and 164 transitions. Second operand 15 states. [2021-01-06 09:38:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:14,297 INFO L93 Difference]: Finished difference Result 731 states and 1031 transitions. [2021-01-06 09:38:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:38:14,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 119 [2021-01-06 09:38:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:14,301 INFO L225 Difference]: With dead ends: 731 [2021-01-06 09:38:14,301 INFO L226 Difference]: Without dead ends: 633 [2021-01-06 09:38:14,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:38:14,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-01-06 09:38:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 125. [2021-01-06 09:38:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 09:38:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2021-01-06 09:38:14,323 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 119 [2021-01-06 09:38:14,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:14,324 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2021-01-06 09:38:14,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:38:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2021-01-06 09:38:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-06 09:38:14,325 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:14,325 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 12, 12, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:14,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:38:14,539 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:14,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:14,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1454337138, now seen corresponding path program 11 times [2021-01-06 09:38:14,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:14,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683530792] [2021-01-06 09:38:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2021-01-06 09:38:14,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683530792] [2021-01-06 09:38:14,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325621702] [2021-01-06 09:38:14,759 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 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 09:38:14,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 09:38:14,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:14,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:38:14,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 556 proven. 34 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-01-06 09:38:15,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:15,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-01-06 09:38:15,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61618181] [2021-01-06 09:38:15,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:38:15,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:15,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:38:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:38:15,040 INFO L87 Difference]: Start difference. First operand 125 states and 166 transitions. Second operand 23 states. [2021-01-06 09:38:19,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:19,319 INFO L93 Difference]: Finished difference Result 1125 states and 1584 transitions. [2021-01-06 09:38:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-01-06 09:38:19,320 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2021-01-06 09:38:19,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:19,325 INFO L225 Difference]: With dead ends: 1125 [2021-01-06 09:38:19,326 INFO L226 Difference]: Without dead ends: 889 [2021-01-06 09:38:19,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9812 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5039, Invalid=17913, Unknown=0, NotChecked=0, Total=22952 [2021-01-06 09:38:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-01-06 09:38:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 187. [2021-01-06 09:38:19,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-01-06 09:38:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 239 transitions. [2021-01-06 09:38:19,376 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 239 transitions. Word has length 121 [2021-01-06 09:38:19,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:19,376 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 239 transitions. [2021-01-06 09:38:19,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:38:19,376 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 239 transitions. [2021-01-06 09:38:19,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-01-06 09:38:19,378 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:19,379 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:19,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 09:38:19,595 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:19,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:19,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1722627106, now seen corresponding path program 12 times [2021-01-06 09:38:19,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:19,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633203853] [2021-01-06 09:38:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1776 trivial. 0 not checked. [2021-01-06 09:38:19,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633203853] [2021-01-06 09:38:19,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135070655] [2021-01-06 09:38:19,843 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 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 09:38:19,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 09:38:19,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:19,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:38:19,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:20,189 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:20,214 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:20,243 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:20,245 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 327 proven. 12 refuted. 0 times theorem prover too weak. 1606 trivial. 0 not checked. [2021-01-06 09:38:20,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:20,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2021-01-06 09:38:20,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97733895] [2021-01-06 09:38:20,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:38:20,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:20,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:38:20,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:38:20,284 INFO L87 Difference]: Start difference. First operand 187 states and 239 transitions. Second operand 23 states. [2021-01-06 09:38:22,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:22,857 INFO L93 Difference]: Finished difference Result 1135 states and 1546 transitions. [2021-01-06 09:38:22,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-01-06 09:38:22,857 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 159 [2021-01-06 09:38:22,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:22,863 INFO L225 Difference]: With dead ends: 1135 [2021-01-06 09:38:22,863 INFO L226 Difference]: Without dead ends: 967 [2021-01-06 09:38:22,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3897 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2580, Invalid=8340, Unknown=0, NotChecked=0, Total=10920 [2021-01-06 09:38:22,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-01-06 09:38:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 234. [2021-01-06 09:38:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2021-01-06 09:38:22,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 312 transitions. [2021-01-06 09:38:22,926 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 312 transitions. Word has length 159 [2021-01-06 09:38:22,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:22,926 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 312 transitions. [2021-01-06 09:38:22,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:38:22,926 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 312 transitions. [2021-01-06 09:38:22,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-01-06 09:38:22,929 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:22,930 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:23,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:23,134 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:23,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:23,135 INFO L82 PathProgramCache]: Analyzing trace with hash -440442825, now seen corresponding path program 13 times [2021-01-06 09:38:23,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:23,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418156577] [2021-01-06 09:38:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3711 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2021-01-06 09:38:23,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418156577] [2021-01-06 09:38:23,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616965159] [2021-01-06 09:38:23,506 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 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 09:38:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:23,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:38:23,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3711 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2021-01-06 09:38:23,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:23,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:38:23,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463514369] [2021-01-06 09:38:23,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:38:23,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:23,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:38:23,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:23,937 INFO L87 Difference]: Start difference. First operand 234 states and 312 transitions. Second operand 18 states. [2021-01-06 09:38:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:24,472 INFO L93 Difference]: Finished difference Result 1537 states and 2129 transitions. [2021-01-06 09:38:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:38:24,473 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 206 [2021-01-06 09:38:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:24,480 INFO L225 Difference]: With dead ends: 1537 [2021-01-06 09:38:24,480 INFO L226 Difference]: Without dead ends: 1334 [2021-01-06 09:38:24,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:38:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-01-06 09:38:24,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 236. [2021-01-06 09:38:24,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2021-01-06 09:38:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 314 transitions. [2021-01-06 09:38:24,533 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 314 transitions. Word has length 206 [2021-01-06 09:38:24,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:24,533 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 314 transitions. [2021-01-06 09:38:24,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:38:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 314 transitions. [2021-01-06 09:38:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-01-06 09:38:24,536 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:24,536 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 15, 15, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:24,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:38:24,750 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash -672818759, now seen corresponding path program 14 times [2021-01-06 09:38:24,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:24,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476833357] [2021-01-06 09:38:24,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3740 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2021-01-06 09:38:25,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476833357] [2021-01-06 09:38:25,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065808855] [2021-01-06 09:38:25,022 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 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 09:38:25,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:38:25,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:25,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:38:25,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3740 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2021-01-06 09:38:25,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:25,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 09:38:25,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15702930] [2021-01-06 09:38:25,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:38:25,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:25,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:38:25,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:38:25,417 INFO L87 Difference]: Start difference. First operand 236 states and 314 transitions. Second operand 19 states. [2021-01-06 09:38:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:25,966 INFO L93 Difference]: Finished difference Result 1709 states and 2367 transitions. [2021-01-06 09:38:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:38:25,967 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 208 [2021-01-06 09:38:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:25,974 INFO L225 Difference]: With dead ends: 1709 [2021-01-06 09:38:25,975 INFO L226 Difference]: Without dead ends: 1506 [2021-01-06 09:38:25,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:38:25,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-01-06 09:38:26,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 238. [2021-01-06 09:38:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2021-01-06 09:38:26,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 316 transitions. [2021-01-06 09:38:26,038 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 316 transitions. Word has length 208 [2021-01-06 09:38:26,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:26,039 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 316 transitions. [2021-01-06 09:38:26,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:38:26,039 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 316 transitions. [2021-01-06 09:38:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-01-06 09:38:26,042 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:26,042 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 16, 16, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:26,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 09:38:26,256 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:26,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:26,256 INFO L82 PathProgramCache]: Analyzing trace with hash -647791941, now seen corresponding path program 15 times [2021-01-06 09:38:26,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:26,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498252181] [2021-01-06 09:38:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2021-01-06 09:38:26,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498252181] [2021-01-06 09:38:26,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705667643] [2021-01-06 09:38:26,560 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 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 09:38:26,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 09:38:26,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:26,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:38:26,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:26,933 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:26,963 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:26,995 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:26,996 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 592 proven. 22 refuted. 0 times theorem prover too weak. 3157 trivial. 0 not checked. [2021-01-06 09:38:27,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:27,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2021-01-06 09:38:27,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139178783] [2021-01-06 09:38:27,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 09:38:27,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:27,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 09:38:27,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:38:27,057 INFO L87 Difference]: Start difference. First operand 238 states and 316 transitions. Second operand 27 states. [2021-01-06 09:38:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:32,521 INFO L93 Difference]: Finished difference Result 1622 states and 2265 transitions. [2021-01-06 09:38:32,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-01-06 09:38:32,521 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 210 [2021-01-06 09:38:32,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:32,527 INFO L225 Difference]: With dead ends: 1622 [2021-01-06 09:38:32,528 INFO L226 Difference]: Without dead ends: 1407 [2021-01-06 09:38:32,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11036 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6085, Invalid=20975, Unknown=0, NotChecked=0, Total=27060 [2021-01-06 09:38:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-01-06 09:38:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 324. [2021-01-06 09:38:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2021-01-06 09:38:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 444 transitions. [2021-01-06 09:38:32,627 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 444 transitions. Word has length 210 [2021-01-06 09:38:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:32,627 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 444 transitions. [2021-01-06 09:38:32,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 09:38:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 444 transitions. [2021-01-06 09:38:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-01-06 09:38:32,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:32,629 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:32,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:32,843 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:32,843 INFO L82 PathProgramCache]: Analyzing trace with hash -912802302, now seen corresponding path program 16 times [2021-01-06 09:38:32,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:32,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055798906] [2021-01-06 09:38:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 7448 trivial. 0 not checked. [2021-01-06 09:38:33,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055798906] [2021-01-06 09:38:33,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547908873] [2021-01-06 09:38:33,254 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 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 09:38:33,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:38:33,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:33,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 09:38:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 7448 trivial. 0 not checked. [2021-01-06 09:38:33,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:33,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 09:38:33,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412758591] [2021-01-06 09:38:33,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:38:33,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:33,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:38:33,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:38:33,788 INFO L87 Difference]: Start difference. First operand 324 states and 444 transitions. Second operand 21 states. [2021-01-06 09:38:34,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:34,588 INFO L93 Difference]: Finished difference Result 2376 states and 3390 transitions. [2021-01-06 09:38:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 09:38:34,588 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 284 [2021-01-06 09:38:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:34,599 INFO L225 Difference]: With dead ends: 2376 [2021-01-06 09:38:34,599 INFO L226 Difference]: Without dead ends: 2089 [2021-01-06 09:38:34,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:38:34,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-01-06 09:38:34,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 326. [2021-01-06 09:38:34,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2021-01-06 09:38:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 446 transitions. [2021-01-06 09:38:34,718 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 446 transitions. Word has length 284 [2021-01-06 09:38:34,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:34,718 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 446 transitions. [2021-01-06 09:38:34,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:38:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 446 transitions. [2021-01-06 09:38:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-01-06 09:38:34,720 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:34,721 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 18, 18, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:34,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:34,935 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:34,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1906238460, now seen corresponding path program 17 times [2021-01-06 09:38:34,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:34,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829440284] [2021-01-06 09:38:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7772 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 7448 trivial. 0 not checked. [2021-01-06 09:38:35,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829440284] [2021-01-06 09:38:35,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120559893] [2021-01-06 09:38:35,336 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 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 09:38:35,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-01-06 09:38:35,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:35,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:38:35,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7772 backedges. 3641 proven. 136 refuted. 0 times theorem prover too weak. 3995 trivial. 0 not checked. [2021-01-06 09:38:36,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:36,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 35 [2021-01-06 09:38:36,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288186524] [2021-01-06 09:38:36,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 09:38:36,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:36,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 09:38:36,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 09:38:36,078 INFO L87 Difference]: Start difference. First operand 326 states and 446 transitions. Second operand 35 states. [2021-01-06 09:38:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:38:52,725 INFO L93 Difference]: Finished difference Result 3197 states and 4518 transitions. [2021-01-06 09:38:52,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 366 states. [2021-01-06 09:38:52,725 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 286 [2021-01-06 09:38:52,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:38:52,734 INFO L225 Difference]: With dead ends: 3197 [2021-01-06 09:38:52,734 INFO L226 Difference]: Without dead ends: 2664 [2021-01-06 09:38:52,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 372 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66247 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=23634, Invalid=115868, Unknown=0, NotChecked=0, Total=139502 [2021-01-06 09:38:52,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-01-06 09:38:52,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 460. [2021-01-06 09:38:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2021-01-06 09:38:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 606 transitions. [2021-01-06 09:38:52,913 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 606 transitions. Word has length 286 [2021-01-06 09:38:52,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:38:52,913 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 606 transitions. [2021-01-06 09:38:52,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 09:38:52,913 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 606 transitions. [2021-01-06 09:38:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-01-06 09:38:52,915 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:38:52,916 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:38:53,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:38:53,131 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:38:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:38:53,132 INFO L82 PathProgramCache]: Analyzing trace with hash -542207926, now seen corresponding path program 18 times [2021-01-06 09:38:53,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:38:53,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326585533] [2021-01-06 09:38:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:38:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:38:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11002 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10641 trivial. 0 not checked. [2021-01-06 09:38:53,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326585533] [2021-01-06 09:38:53,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885312169] [2021-01-06 09:38:53,648 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 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 09:38:53,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 09:38:53,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:38:53,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:38:53,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:38:54,431 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:54,469 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:54,506 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:54,508 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:38:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11002 backedges. 1503 proven. 51 refuted. 0 times theorem prover too weak. 9448 trivial. 0 not checked. [2021-01-06 09:38:54,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:38:54,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 32 [2021-01-06 09:38:54,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384274470] [2021-01-06 09:38:54,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 09:38:54,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:38:54,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 09:38:54,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:38:54,648 INFO L87 Difference]: Start difference. First operand 460 states and 606 transitions. Second operand 32 states. [2021-01-06 09:39:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:03,308 INFO L93 Difference]: Finished difference Result 2889 states and 3914 transitions. [2021-01-06 09:39:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-01-06 09:39:03,309 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 333 [2021-01-06 09:39:03,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:03,317 INFO L225 Difference]: With dead ends: 2889 [2021-01-06 09:39:03,317 INFO L226 Difference]: Without dead ends: 2457 [2021-01-06 09:39:03,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15958 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=9499, Invalid=29507, Unknown=0, NotChecked=0, Total=39006 [2021-01-06 09:39:03,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-01-06 09:39:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 525. [2021-01-06 09:39:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2021-01-06 09:39:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 706 transitions. [2021-01-06 09:39:03,594 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 706 transitions. Word has length 333 [2021-01-06 09:39:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:03,594 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 706 transitions. [2021-01-06 09:39:03,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 09:39:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 706 transitions. [2021-01-06 09:39:03,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-01-06 09:39:03,597 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:03,597 INFO L422 BasicCegarLoop]: trace histogram [97, 97, 97, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:03,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 09:39:03,812 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:03,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1352181837, now seen corresponding path program 19 times [2021-01-06 09:39:03,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:03,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35123735] [2021-01-06 09:39:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16743 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 16343 trivial. 0 not checked. [2021-01-06 09:39:04,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35123735] [2021-01-06 09:39:04,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363566160] [2021-01-06 09:39:04,353 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 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 09:39:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:39:04,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16743 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 16343 trivial. 0 not checked. [2021-01-06 09:39:05,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:05,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 09:39:05,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982493234] [2021-01-06 09:39:05,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:39:05,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:05,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:39:05,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:39:05,107 INFO L87 Difference]: Start difference. First operand 525 states and 706 transitions. Second operand 24 states. [2021-01-06 09:39:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:06,998 INFO L93 Difference]: Finished difference Result 3911 states and 5379 transitions. [2021-01-06 09:39:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 09:39:06,999 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 398 [2021-01-06 09:39:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:07,011 INFO L225 Difference]: With dead ends: 3911 [2021-01-06 09:39:07,011 INFO L226 Difference]: Without dead ends: 3429 [2021-01-06 09:39:07,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:39:07,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-01-06 09:39:07,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 527. [2021-01-06 09:39:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2021-01-06 09:39:07,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 708 transitions. [2021-01-06 09:39:07,356 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 708 transitions. Word has length 398 [2021-01-06 09:39:07,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:07,357 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 708 transitions. [2021-01-06 09:39:07,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:39:07,357 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 708 transitions. [2021-01-06 09:39:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-01-06 09:39:07,360 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:07,360 INFO L422 BasicCegarLoop]: trace histogram [97, 97, 97, 21, 21, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:07,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 09:39:07,574 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash 971399477, now seen corresponding path program 20 times [2021-01-06 09:39:07,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:07,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10581958] [2021-01-06 09:39:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16784 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 16343 trivial. 0 not checked. [2021-01-06 09:39:08,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10581958] [2021-01-06 09:39:08,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587241765] [2021-01-06 09:39:08,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:08,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:39:08,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:08,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 09:39:08,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16784 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 16343 trivial. 0 not checked. [2021-01-06 09:39:08,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:08,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 09:39:08,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396584201] [2021-01-06 09:39:08,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 09:39:08,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:08,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 09:39:08,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 09:39:08,883 INFO L87 Difference]: Start difference. First operand 527 states and 708 transitions. Second operand 25 states. [2021-01-06 09:39:10,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:10,822 INFO L93 Difference]: Finished difference Result 4263 states and 5862 transitions. [2021-01-06 09:39:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 09:39:10,823 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 400 [2021-01-06 09:39:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:10,835 INFO L225 Difference]: With dead ends: 4263 [2021-01-06 09:39:10,836 INFO L226 Difference]: Without dead ends: 3781 [2021-01-06 09:39:10,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 09:39:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2021-01-06 09:39:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 529. [2021-01-06 09:39:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2021-01-06 09:39:11,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 710 transitions. [2021-01-06 09:39:11,100 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 710 transitions. Word has length 400 [2021-01-06 09:39:11,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:11,100 INFO L481 AbstractCegarLoop]: Abstraction has 529 states and 710 transitions. [2021-01-06 09:39:11,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 09:39:11,100 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 710 transitions. [2021-01-06 09:39:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-01-06 09:39:11,103 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:11,103 INFO L422 BasicCegarLoop]: trace histogram [97, 97, 97, 22, 22, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:11,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:11,309 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:11,310 INFO L82 PathProgramCache]: Analyzing trace with hash 550048311, now seen corresponding path program 21 times [2021-01-06 09:39:11,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:11,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281070437] [2021-01-06 09:39:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16827 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 16343 trivial. 0 not checked. [2021-01-06 09:39:11,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281070437] [2021-01-06 09:39:11,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793090057] [2021-01-06 09:39:11,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:12,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 09:39:12,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:39:12,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:12,745 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:39:12,786 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:39:12,829 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:39:12,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:39:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16827 backedges. 2161 proven. 70 refuted. 0 times theorem prover too weak. 14596 trivial. 0 not checked. [2021-01-06 09:39:12,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:12,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2021-01-06 09:39:12,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256633950] [2021-01-06 09:39:12,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 09:39:12,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:12,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 09:39:12,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=890, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:39:12,936 INFO L87 Difference]: Start difference. First operand 529 states and 710 transitions. Second operand 36 states. [2021-01-06 09:39:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:29,114 INFO L93 Difference]: Finished difference Result 3722 states and 5134 transitions. [2021-01-06 09:39:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2021-01-06 09:39:29,114 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 402 [2021-01-06 09:39:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:29,125 INFO L225 Difference]: With dead ends: 3722 [2021-01-06 09:39:29,125 INFO L226 Difference]: Without dead ends: 3225 [2021-01-06 09:39:29,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33054 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=17582, Invalid=58318, Unknown=0, NotChecked=0, Total=75900 [2021-01-06 09:39:29,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-01-06 09:39:29,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 669. [2021-01-06 09:39:29,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2021-01-06 09:39:29,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 915 transitions. [2021-01-06 09:39:29,518 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 915 transitions. Word has length 402 [2021-01-06 09:39:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:29,518 INFO L481 AbstractCegarLoop]: Abstraction has 669 states and 915 transitions. [2021-01-06 09:39:29,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 09:39:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 915 transitions. [2021-01-06 09:39:29,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-01-06 09:39:29,522 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:29,522 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 127, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:29,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 09:39:29,738 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:29,739 INFO L82 PathProgramCache]: Analyzing trace with hash 390525890, now seen corresponding path program 22 times [2021-01-06 09:39:29,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:29,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554704034] [2021-01-06 09:39:29,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 28041 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 27512 trivial. 0 not checked. [2021-01-06 09:39:30,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554704034] [2021-01-06 09:39:30,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449033211] [2021-01-06 09:39:30,512 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 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 09:39:30,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:39:30,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:31,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 09:39:31,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 28041 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 27512 trivial. 0 not checked. [2021-01-06 09:39:31,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:31,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 09:39:31,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198359479] [2021-01-06 09:39:31,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 09:39:31,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:31,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 09:39:31,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:39:31,617 INFO L87 Difference]: Start difference. First operand 669 states and 915 transitions. Second operand 27 states. [2021-01-06 09:39:35,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:39:35,104 INFO L93 Difference]: Finished difference Result 5398 states and 7569 transitions. [2021-01-06 09:39:35,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 09:39:35,105 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 503 [2021-01-06 09:39:35,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:39:35,124 INFO L225 Difference]: With dead ends: 5398 [2021-01-06 09:39:35,125 INFO L226 Difference]: Without dead ends: 4778 [2021-01-06 09:39:35,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:39:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4778 states. [2021-01-06 09:39:35,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4778 to 671. [2021-01-06 09:39:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2021-01-06 09:39:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 917 transitions. [2021-01-06 09:39:35,486 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 917 transitions. Word has length 503 [2021-01-06 09:39:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:39:35,486 INFO L481 AbstractCegarLoop]: Abstraction has 671 states and 917 transitions. [2021-01-06 09:39:35,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 09:39:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 917 transitions. [2021-01-06 09:39:35,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-01-06 09:39:35,490 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:39:35,490 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 127, 24, 24, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:39:35,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:39:35,704 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:39:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:39:35,705 INFO L82 PathProgramCache]: Analyzing trace with hash 59118720, now seen corresponding path program 23 times [2021-01-06 09:39:35,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:39:35,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956012271] [2021-01-06 09:39:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:39:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:39:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 28088 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 27512 trivial. 0 not checked. [2021-01-06 09:39:36,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956012271] [2021-01-06 09:39:36,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075344493] [2021-01-06 09:39:36,441 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 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 09:39:36,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 09:39:36,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:39:36,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:39:36,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:39:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 28088 backedges. 9449 proven. 343 refuted. 0 times theorem prover too weak. 18296 trivial. 0 not checked. [2021-01-06 09:39:37,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:39:37,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 47 [2021-01-06 09:39:37,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138389046] [2021-01-06 09:39:37,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 09:39:37,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:39:37,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 09:39:37,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1706, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 09:39:37,757 INFO L87 Difference]: Start difference. First operand 671 states and 917 transitions. Second operand 47 states. [2021-01-06 09:40:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:40:19,651 INFO L93 Difference]: Finished difference Result 6772 states and 9423 transitions. [2021-01-06 09:40:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 636 states. [2021-01-06 09:40:19,652 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 505 [2021-01-06 09:40:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:40:19,662 INFO L225 Difference]: With dead ends: 6772 [2021-01-06 09:40:19,662 INFO L226 Difference]: Without dead ends: 5801 [2021-01-06 09:40:19,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 814 SyntacticMatches, 1 SemanticMatches, 645 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206133 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=64089, Invalid=353873, Unknown=0, NotChecked=0, Total=417962 [2021-01-06 09:40:19,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-01-06 09:40:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 886. [2021-01-06 09:40:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2021-01-06 09:40:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1183 transitions. [2021-01-06 09:40:20,230 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1183 transitions. Word has length 505 [2021-01-06 09:40:20,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:40:20,231 INFO L481 AbstractCegarLoop]: Abstraction has 886 states and 1183 transitions. [2021-01-06 09:40:20,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 09:40:20,231 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1183 transitions. [2021-01-06 09:40:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2021-01-06 09:40:20,235 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:40:20,236 INFO L422 BasicCegarLoop]: trace histogram [143, 143, 143, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:40:20,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 09:40:20,449 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:40:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:40:20,450 INFO L82 PathProgramCache]: Analyzing trace with hash -354836150, now seen corresponding path program 24 times [2021-01-06 09:40:20,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:40:20,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918287659] [2021-01-06 09:40:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:40:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:40:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 35368 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 34743 trivial. 0 not checked. [2021-01-06 09:40:21,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918287659] [2021-01-06 09:40:21,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197408633] [2021-01-06 09:40:21,361 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 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 09:40:21,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-01-06 09:40:21,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:40:21,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:40:21,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:40:21,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:40:21,845 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:40:21,884 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:40:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 35368 backedges. 6405 proven. 11 refuted. 0 times theorem prover too weak. 28952 trivial. 0 not checked. [2021-01-06 09:40:22,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:40:22,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2021-01-06 09:40:22,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039794310] [2021-01-06 09:40:22,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 09:40:22,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:40:22,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 09:40:22,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=853, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:40:22,535 INFO L87 Difference]: Start difference. First operand 886 states and 1183 transitions. Second operand 36 states. [2021-01-06 09:40:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:40:34,060 INFO L93 Difference]: Finished difference Result 10354 states and 13961 transitions. [2021-01-06 09:40:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-01-06 09:40:34,061 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 561 [2021-01-06 09:40:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:40:34,077 INFO L225 Difference]: With dead ends: 10354 [2021-01-06 09:40:34,077 INFO L226 Difference]: Without dead ends: 9521 [2021-01-06 09:40:34,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4109 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3338, Invalid=11424, Unknown=0, NotChecked=0, Total=14762 [2021-01-06 09:40:34,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9521 states. [2021-01-06 09:40:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9521 to 873. [2021-01-06 09:40:34,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2021-01-06 09:40:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1157 transitions. [2021-01-06 09:40:34,866 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1157 transitions. Word has length 561 [2021-01-06 09:40:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:40:34,867 INFO L481 AbstractCegarLoop]: Abstraction has 873 states and 1157 transitions. [2021-01-06 09:40:34,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 09:40:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1157 transitions. [2021-01-06 09:40:34,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2021-01-06 09:40:34,872 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:40:34,873 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 144, 26, 26, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:40:35,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 09:40:35,088 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:40:35,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:40:35,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1128630262, now seen corresponding path program 25 times [2021-01-06 09:40:35,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:40:35,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294841704] [2021-01-06 09:40:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:40:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:40:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 35872 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 35196 trivial. 0 not checked. [2021-01-06 09:40:36,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294841704] [2021-01-06 09:40:36,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167350621] [2021-01-06 09:40:36,192 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 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 09:40:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:40:36,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 09:40:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:40:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 35872 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 35196 trivial. 0 not checked. [2021-01-06 09:40:37,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:40:37,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 09:40:37,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402286387] [2021-01-06 09:40:37,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 09:40:37,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:40:37,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 09:40:37,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:40:37,301 INFO L87 Difference]: Start difference. First operand 873 states and 1157 transitions. Second operand 30 states. [2021-01-06 09:40:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:40:42,065 INFO L93 Difference]: Finished difference Result 6651 states and 8930 transitions. [2021-01-06 09:40:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 09:40:42,066 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 566 [2021-01-06 09:40:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:40:42,076 INFO L225 Difference]: With dead ends: 6651 [2021-01-06 09:40:42,077 INFO L226 Difference]: Without dead ends: 5833 [2021-01-06 09:40:42,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 566 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:40:42,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2021-01-06 09:40:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 875. [2021-01-06 09:40:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 875 states. [2021-01-06 09:40:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1159 transitions. [2021-01-06 09:40:42,858 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1159 transitions. Word has length 566 [2021-01-06 09:40:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:40:42,858 INFO L481 AbstractCegarLoop]: Abstraction has 875 states and 1159 transitions. [2021-01-06 09:40:42,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 09:40:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1159 transitions. [2021-01-06 09:40:42,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2021-01-06 09:40:42,863 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:40:42,863 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 144, 27, 27, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:40:43,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 09:40:43,080 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:40:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:40:43,081 INFO L82 PathProgramCache]: Analyzing trace with hash 823670668, now seen corresponding path program 26 times [2021-01-06 09:40:43,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:40:43,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191767980] [2021-01-06 09:40:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:40:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:40:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 35925 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 35196 trivial. 0 not checked. [2021-01-06 09:40:44,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191767980] [2021-01-06 09:40:44,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759527227] [2021-01-06 09:40:44,128 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:40:44,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:40:44,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:40:44,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 2117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 09:40:44,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:40:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 35925 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 35196 trivial. 0 not checked. [2021-01-06 09:40:45,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:40:45,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 09:40:45,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170367545] [2021-01-06 09:40:45,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 09:40:45,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:40:45,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 09:40:45,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 09:40:45,220 INFO L87 Difference]: Start difference. First operand 875 states and 1159 transitions. Second operand 31 states. [2021-01-06 09:40:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:40:50,393 INFO L93 Difference]: Finished difference Result 7138 states and 9581 transitions. [2021-01-06 09:40:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 09:40:50,394 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 568 [2021-01-06 09:40:50,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:40:50,401 INFO L225 Difference]: With dead ends: 7138 [2021-01-06 09:40:50,402 INFO L226 Difference]: Without dead ends: 6320 [2021-01-06 09:40:50,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 09:40:50,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6320 states. [2021-01-06 09:40:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6320 to 877. [2021-01-06 09:40:51,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2021-01-06 09:40:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1161 transitions. [2021-01-06 09:40:51,076 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1161 transitions. Word has length 568 [2021-01-06 09:40:51,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:40:51,076 INFO L481 AbstractCegarLoop]: Abstraction has 877 states and 1161 transitions. [2021-01-06 09:40:51,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 09:40:51,076 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1161 transitions. [2021-01-06 09:40:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2021-01-06 09:40:51,081 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:40:51,081 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 144, 28, 28, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:40:51,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:40:51,295 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:40:51,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:40:51,295 INFO L82 PathProgramCache]: Analyzing trace with hash 84156046, now seen corresponding path program 27 times [2021-01-06 09:40:51,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:40:51,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531874196] [2021-01-06 09:40:51,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:40:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:40:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 35980 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 35196 trivial. 0 not checked. [2021-01-06 09:40:52,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531874196] [2021-01-06 09:40:52,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024438526] [2021-01-06 09:40:52,393 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:40:52,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 09:40:52,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:40:52,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:40:52,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:40:53,660 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:40:53,723 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:40:53,789 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:40:53,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:40:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 35980 backedges. 4057 proven. 117 refuted. 0 times theorem prover too weak. 31806 trivial. 0 not checked. [2021-01-06 09:40:53,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:40:53,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15] total 44 [2021-01-06 09:40:53,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744312256] [2021-01-06 09:40:53,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 09:40:53,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:40:53,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 09:40:53,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=1332, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 09:40:53,997 INFO L87 Difference]: Start difference. First operand 877 states and 1161 transitions. Second operand 44 states. [2021-01-06 09:41:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:41:27,138 INFO L93 Difference]: Finished difference Result 5939 states and 8013 transitions. [2021-01-06 09:41:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 359 states. [2021-01-06 09:41:27,139 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 570 [2021-01-06 09:41:27,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:41:27,145 INFO L225 Difference]: With dead ends: 5939 [2021-01-06 09:41:27,145 INFO L226 Difference]: Without dead ends: 5102 [2021-01-06 09:41:27,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1151 GetRequests, 793 SyntacticMatches, 0 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56526 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=31637, Invalid=97603, Unknown=0, NotChecked=0, Total=129240 [2021-01-06 09:41:27,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5102 states. [2021-01-06 09:41:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5102 to 1059. [2021-01-06 09:41:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1059 states. [2021-01-06 09:41:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1423 transitions. [2021-01-06 09:41:28,179 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1423 transitions. Word has length 570 [2021-01-06 09:41:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:41:28,180 INFO L481 AbstractCegarLoop]: Abstraction has 1059 states and 1423 transitions. [2021-01-06 09:41:28,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 09:41:28,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1423 transitions. [2021-01-06 09:41:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2021-01-06 09:41:28,186 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:41:28,187 INFO L422 BasicCegarLoop]: trace histogram [200, 200, 200, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:41:28,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 09:41:28,403 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:41:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:41:28,404 INFO L82 PathProgramCache]: Analyzing trace with hash -764166126, now seen corresponding path program 28 times [2021-01-06 09:41:28,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:41:28,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332716524] [2021-01-06 09:41:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:41:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:41:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 67303 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 66462 trivial. 0 not checked. [2021-01-06 09:41:29,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332716524] [2021-01-06 09:41:29,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225979410] [2021-01-06 09:41:29,838 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:41:30,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:41:30,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:41:30,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 2829 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 09:41:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:41:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 67303 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 66462 trivial. 0 not checked. [2021-01-06 09:41:31,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:41:31,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 09:41:31,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022627958] [2021-01-06 09:41:31,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 09:41:31,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:41:31,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 09:41:31,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 09:41:31,464 INFO L87 Difference]: Start difference. First operand 1059 states and 1423 transitions. Second operand 33 states. [2021-01-06 09:41:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:41:43,980 INFO L93 Difference]: Finished difference Result 10080 states and 13761 transitions. [2021-01-06 09:41:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 09:41:43,983 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 752 [2021-01-06 09:41:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:41:43,992 INFO L225 Difference]: With dead ends: 10080 [2021-01-06 09:41:43,992 INFO L226 Difference]: Without dead ends: 9082 [2021-01-06 09:41:43,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 752 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 09:41:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9082 states. [2021-01-06 09:41:45,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9082 to 1061. [2021-01-06 09:41:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1061 states. [2021-01-06 09:41:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1425 transitions. [2021-01-06 09:41:45,008 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1425 transitions. Word has length 752 [2021-01-06 09:41:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:41:45,008 INFO L481 AbstractCegarLoop]: Abstraction has 1061 states and 1425 transitions. [2021-01-06 09:41:45,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 09:41:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1425 transitions. [2021-01-06 09:41:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2021-01-06 09:41:45,014 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:41:45,015 INFO L422 BasicCegarLoop]: trace histogram [200, 200, 200, 30, 30, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:41:45,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:41:45,220 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:41:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:41:45,221 INFO L82 PathProgramCache]: Analyzing trace with hash 664049940, now seen corresponding path program 29 times [2021-01-06 09:41:45,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:41:45,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631292290] [2021-01-06 09:41:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:41:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:41:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 67362 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 66462 trivial. 0 not checked. [2021-01-06 09:41:46,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631292290] [2021-01-06 09:41:46,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770889238] [2021-01-06 09:41:46,673 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:41:46,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 09:41:46,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:41:46,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 09:41:46,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:41:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 67362 backedges. 19395 proven. 518 refuted. 0 times theorem prover too weak. 47449 trivial. 0 not checked. [2021-01-06 09:41:49,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:41:49,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26] total 57 [2021-01-06 09:41:49,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145849240] [2021-01-06 09:41:49,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 09:41:49,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:41:49,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 09:41:49,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=2515, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 09:41:49,063 INFO L87 Difference]: Start difference. First operand 1061 states and 1425 transitions. Second operand 57 states.