/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/loop-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:50:56,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:50:56,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:50:56,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:50:56,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:50:56,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:50:56,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:50:56,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:50:56,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:50:56,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:50:56,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:50:56,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:50:56,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:50:56,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:50:56,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:50:56,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:50:56,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:50:56,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:50:56,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:50:56,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:50:56,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:50:56,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:50:56,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:50:56,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:50:56,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 16:50:56,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 16:50:56,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 16:50:56,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 16:50:56,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 16:50:56,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 16:50:56,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:50:56,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:50:56,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:50:56,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:50:56,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:50:56,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:50:56,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:50:56,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:50:56,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:50:56,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:50:56,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:50:56,592 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 16:50:56,646 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:50:56,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:50:56,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:50:56,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:50:56,652 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:50:56,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:50:56,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:50:56,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:50:56,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:50:56,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:50:56,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:50:56,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:50:56,654 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:50:56,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:50:56,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:50:56,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:50:56,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:50:56,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:50:56,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:50:56,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:50:56,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:50:56,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:50:56,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:50:56,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:50:56,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:50:56,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:50:57,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:50:57,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:50:57,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:50:57,123 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:50:57,123 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:50:57,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gj2007.i [2021-01-06 16:50:57,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e057176b1/5de30741a48f4c378a4ec142add1430d/FLAGc1045e866 [2021-01-06 16:50:57,768 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:50:57,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007.i [2021-01-06 16:50:57,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e057176b1/5de30741a48f4c378a4ec142add1430d/FLAGc1045e866 [2021-01-06 16:50:58,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e057176b1/5de30741a48f4c378a4ec142add1430d [2021-01-06 16:50:58,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:50:58,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:50:58,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:50:58,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:50:58,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:50:58,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:50:58" (1/1) ... [2021-01-06 16:50:58,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76af5f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:58, skipping insertion in model container [2021-01-06 16:50:58,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:50:58" (1/1) ... [2021-01-06 16:50:58,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:50:58,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:50:58,311 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/loop-lit/gj2007.i[895,908] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 16:50:58,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:50:58,345 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:50:58,365 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/loop-lit/gj2007.i[895,908] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 16:50:58,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:50:58,393 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:50:58,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:58 WrapperNode [2021-01-06 16:50:58,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:50:58,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:50:58,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:50:58,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:50:58,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:58" (1/1) ... [2021-01-06 16:50:58,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:58" (1/1) ... [2021-01-06 16:50:58,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:50:58,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:50:58,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:50:58,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:50:58,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:58" (1/1) ... [2021-01-06 16:50:58,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:58" (1/1) ... [2021-01-06 16:50:58,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:58" (1/1) ... [2021-01-06 16:50:58,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:58" (1/1) ... [2021-01-06 16:50:58,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:58" (1/1) ... [2021-01-06 16:50:58,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:58" (1/1) ... [2021-01-06 16:50:58,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:58" (1/1) ... [2021-01-06 16:50:58,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:50:58,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:50:58,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:50:58,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:50:58,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:58" (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 16:50:58,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:50:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:50:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:50:58,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:50:58,819 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:50:58,819 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:50:58,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:58 BoogieIcfgContainer [2021-01-06 16:50:58,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:50:58,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:50:58,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:50:58,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:50:58,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:50:58" (1/3) ... [2021-01-06 16:50:58,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15c45909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:50:58, skipping insertion in model container [2021-01-06 16:50:58,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:58" (2/3) ... [2021-01-06 16:50:58,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15c45909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:50:58, skipping insertion in model container [2021-01-06 16:50:58,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:58" (3/3) ... [2021-01-06 16:50:58,831 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.i [2021-01-06 16:50:58,840 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:50:58,845 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:50:58,869 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:50:58,900 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:50:58,901 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:50:58,901 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:50:58,901 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:50:58,901 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:50:58,901 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:50:58,901 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:50:58,902 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:50:58,917 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-01-06 16:50:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:50:58,923 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:58,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:50:58,924 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:58,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:58,931 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-01-06 16:50:58,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:58,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125216492] [2021-01-06 16:50:58,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:59,101 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 16:50:59,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125216492] [2021-01-06 16:50:59,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:59,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:50:59,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174305212] [2021-01-06 16:50:59,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:50:59,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:59,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:50:59,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:50:59,130 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2021-01-06 16:50:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:59,148 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-01-06 16:50:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:50:59,150 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:50:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:59,161 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:50:59,162 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:50:59,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:50:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:50:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:50:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:50:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-01-06 16:50:59,206 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-01-06 16:50:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:59,206 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-01-06 16:50:59,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:50:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-01-06 16:50:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:50:59,207 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:59,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:50:59,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:50:59,208 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:59,209 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-01-06 16:50:59,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:59,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211677942] [2021-01-06 16:50:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:59,267 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 16:50:59,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211677942] [2021-01-06 16:50:59,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:59,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:50:59,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392709] [2021-01-06 16:50:59,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:50:59,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:59,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:50:59,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:50:59,272 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2021-01-06 16:50:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:59,312 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-01-06 16:50:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:50:59,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:50:59,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:59,318 INFO L225 Difference]: With dead ends: 16 [2021-01-06 16:50:59,318 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:50:59,319 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 16:50:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:50:59,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:50:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:50:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-01-06 16:50:59,327 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-01-06 16:50:59,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:59,328 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-01-06 16:50:59,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:50:59,328 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-01-06 16:50:59,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:50:59,329 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:59,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:59,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:50:59,333 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:59,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:59,334 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2021-01-06 16:50:59,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:59,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36239595] [2021-01-06 16:50:59,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:59,438 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 16:50:59,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36239595] [2021-01-06 16:50:59,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030884818] [2021-01-06 16:50:59,439 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 16:50:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:59,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:50:59,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:59,624 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 16:50:59,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:59,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:50:59,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411201795] [2021-01-06 16:50:59,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:50:59,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:59,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:50:59,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:50:59,627 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2021-01-06 16:50:59,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:59,661 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-01-06 16:50:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:50:59,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 16:50:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:59,662 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:50:59,662 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:50:59,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 16:50:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:50:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:50:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:50:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 16:50:59,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-01-06 16:50:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:59,667 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 16:50:59,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:50:59,667 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 16:50:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:50:59,668 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:59,668 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:59,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:50:59,883 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:59,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:59,885 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2021-01-06 16:50:59,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:59,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918808466] [2021-01-06 16:50:59,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:50:59,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918808466] [2021-01-06 16:50:59,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:59,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:50:59,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148400430] [2021-01-06 16:50:59,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:50:59,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:59,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:50:59,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:50:59,925 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2021-01-06 16:50:59,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:59,943 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-01-06 16:50:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:50:59,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 16:50:59,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:59,945 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:50:59,945 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:50:59,946 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 16:50:59,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:50:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-01-06 16:50:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:50:59,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 16:50:59,950 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-01-06 16:50:59,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:59,950 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 16:50:59,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:50:59,951 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 16:50:59,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:50:59,958 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:59,959 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:59,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:50:59,959 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:59,960 INFO L82 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2021-01-06 16:50:59,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:59,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29568860] [2021-01-06 16:50:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:00,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29568860] [2021-01-06 16:51:00,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294557786] [2021-01-06 16:51:00,035 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 16:51:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:00,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:51:00,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:00,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:00,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:51:00,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188243941] [2021-01-06 16:51:00,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:51:00,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:00,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:51:00,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:51:00,121 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2021-01-06 16:51:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:00,151 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-01-06 16:51:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:51:00,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-01-06 16:51:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:00,152 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:51:00,153 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 16:51:00,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:51:00,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 16:51:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 16:51:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:51:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 16:51:00,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-01-06 16:51:00,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:00,158 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 16:51:00,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:51:00,159 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 16:51:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:51:00,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:00,159 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:00,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:00,374 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:00,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:00,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 2 times [2021-01-06 16:51:00,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:00,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849176389] [2021-01-06 16:51:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:00,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849176389] [2021-01-06 16:51:00,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91183611] [2021-01-06 16:51:00,452 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 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 16:51:00,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:00,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:00,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:51:00,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:00,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:00,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:51:00,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541241653] [2021-01-06 16:51:00,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:51:00,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:00,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:51:00,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:51:00,553 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2021-01-06 16:51:00,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:00,578 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-01-06 16:51:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:51:00,579 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2021-01-06 16:51:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:00,580 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:51:00,580 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:51:00,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 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 16:51:00,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:51:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 16:51:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:51:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 16:51:00,584 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-01-06 16:51:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:00,585 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 16:51:00,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:51:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 16:51:00,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:51:00,586 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:00,586 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:00,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:00,800 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:00,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 3 times [2021-01-06 16:51:00,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:00,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129829151] [2021-01-06 16:51:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:00,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129829151] [2021-01-06 16:51:00,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299125075] [2021-01-06 16:51:00,893 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 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 16:51:00,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:51:00,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:00,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:51:00,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 16:51:01,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:01,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-01-06 16:51:01,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546965110] [2021-01-06 16:51:01,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:51:01,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:01,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:51:01,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:51:01,007 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2021-01-06 16:51:01,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:01,053 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-01-06 16:51:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:51:01,053 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2021-01-06 16:51:01,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:01,056 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:51:01,056 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 16:51:01,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:51:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 16:51:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-01-06 16:51:01,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 16:51:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-01-06 16:51:01,062 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-01-06 16:51:01,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:01,062 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-01-06 16:51:01,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:51:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-01-06 16:51:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:51:01,063 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:01,063 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:01,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:01,278 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash -885484758, now seen corresponding path program 4 times [2021-01-06 16:51:01,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:01,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862271232] [2021-01-06 16:51:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:51:01,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862271232] [2021-01-06 16:51:01,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869129360] [2021-01-06 16:51:01,347 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 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 16:51:01,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:01,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:01,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:51:01,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:51:01,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:01,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:51:01,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716134532] [2021-01-06 16:51:01,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:51:01,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:01,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:51:01,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:51:01,463 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 9 states. [2021-01-06 16:51:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:01,493 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-01-06 16:51:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:51:01,493 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2021-01-06 16:51:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:01,494 INFO L225 Difference]: With dead ends: 32 [2021-01-06 16:51:01,494 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:51:01,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 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 16:51:01,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:51:01,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 16:51:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:51:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-01-06 16:51:01,500 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2021-01-06 16:51:01,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:01,500 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-01-06 16:51:01,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:51:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-01-06 16:51:01,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:51:01,501 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:01,501 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:01,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:01,716 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:01,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:01,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 5 times [2021-01-06 16:51:01,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:01,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983424099] [2021-01-06 16:51:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:51:01,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983424099] [2021-01-06 16:51:01,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754111008] [2021-01-06 16:51:01,819 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 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 16:51:01,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 16:51:01,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:01,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:51:01,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:51:01,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:01,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:51:01,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345230808] [2021-01-06 16:51:01,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:51:01,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:01,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:51:01,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:51:01,951 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2021-01-06 16:51:01,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:01,994 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-01-06 16:51:01,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:51:01,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2021-01-06 16:51:01,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:02,001 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:51:02,002 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 16:51:02,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:51:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 16:51:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 16:51:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:51:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 16:51:02,007 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2021-01-06 16:51:02,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:02,007 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 16:51:02,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:51:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 16:51:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:51:02,008 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:02,009 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:02,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:02,222 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:02,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:02,223 INFO L82 PathProgramCache]: Analyzing trace with hash -415213008, now seen corresponding path program 6 times [2021-01-06 16:51:02,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:02,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178454642] [2021-01-06 16:51:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:51:02,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178454642] [2021-01-06 16:51:02,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124356819] [2021-01-06 16:51:02,300 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 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 16:51:02,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 16:51:02,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:02,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:51:02,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:02,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:02,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-01-06 16:51:02,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998212345] [2021-01-06 16:51:02,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:51:02,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:02,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:51:02,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:51:02,436 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 13 states. [2021-01-06 16:51:02,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:02,506 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-01-06 16:51:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:51:02,506 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2021-01-06 16:51:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:02,507 INFO L225 Difference]: With dead ends: 40 [2021-01-06 16:51:02,507 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:51:02,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 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 16:51:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:51:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 16:51:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:51:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-01-06 16:51:02,513 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2021-01-06 16:51:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:02,513 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-01-06 16:51:02,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:51:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-01-06 16:51:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:51:02,515 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:02,515 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:02,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:51:02,730 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:02,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:02,732 INFO L82 PathProgramCache]: Analyzing trace with hash -480119527, now seen corresponding path program 7 times [2021-01-06 16:51:02,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:02,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042184057] [2021-01-06 16:51:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:51:02,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042184057] [2021-01-06 16:51:02,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443254034] [2021-01-06 16:51:02,872 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 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 16:51:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:02,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:51:02,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:51:03,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:03,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:51:03,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621286294] [2021-01-06 16:51:03,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:51:03,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:03,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:51:03,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:51:03,029 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 14 states. [2021-01-06 16:51:03,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:03,085 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-01-06 16:51:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:51:03,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2021-01-06 16:51:03,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:03,086 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:51:03,086 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 16:51:03,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:51:03,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 16:51:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 16:51:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 16:51:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-01-06 16:51:03,092 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2021-01-06 16:51:03,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:03,092 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-01-06 16:51:03,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:51:03,093 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-01-06 16:51:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:51:03,094 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:03,094 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:03,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 16:51:03,310 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:03,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1833733948, now seen corresponding path program 8 times [2021-01-06 16:51:03,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:03,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394111880] [2021-01-06 16:51:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:51:03,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394111880] [2021-01-06 16:51:03,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112662529] [2021-01-06 16:51:03,505 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 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 16:51:03,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:03,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:03,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:51:03,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:51:03,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:03,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:51:03,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648727573] [2021-01-06 16:51:03,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:51:03,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:03,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:51:03,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:51:03,622 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2021-01-06 16:51:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:03,687 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-01-06 16:51:03,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:51:03,688 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2021-01-06 16:51:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:03,689 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:51:03,689 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 16:51:03,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 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 16:51:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 16:51:03,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 16:51:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 16:51:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-01-06 16:51:03,695 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2021-01-06 16:51:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:03,696 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-01-06 16:51:03,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:51:03,696 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-01-06 16:51:03,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:51:03,697 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:03,697 INFO L422 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:03,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:03,913 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:03,914 INFO L82 PathProgramCache]: Analyzing trace with hash 653864095, now seen corresponding path program 9 times [2021-01-06 16:51:03,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:03,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687240847] [2021-01-06 16:51:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:51:04,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687240847] [2021-01-06 16:51:04,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529221213] [2021-01-06 16:51:04,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:04,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:51:04,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:04,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:51:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-01-06 16:51:04,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:04,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 18 [2021-01-06 16:51:04,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380628072] [2021-01-06 16:51:04,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:51:04,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:04,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:51:04,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:51:04,228 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 18 states. [2021-01-06 16:51:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:04,330 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-01-06 16:51:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:51:04,331 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2021-01-06 16:51:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:04,332 INFO L225 Difference]: With dead ends: 49 [2021-01-06 16:51:04,332 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:51:04,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:51:04,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:51:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-01-06 16:51:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:51:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-01-06 16:51:04,338 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2021-01-06 16:51:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:04,339 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-01-06 16:51:04,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:51:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-01-06 16:51:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:51:04,340 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:04,340 INFO L422 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:04,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:04,554 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:04,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:04,556 INFO L82 PathProgramCache]: Analyzing trace with hash -33157337, now seen corresponding path program 10 times [2021-01-06 16:51:04,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:04,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620630754] [2021-01-06 16:51:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:51:04,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620630754] [2021-01-06 16:51:04,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470689951] [2021-01-06 16:51:04,749 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 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 16:51:04,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:04,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:04,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:51:04,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:51:04,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:04,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:51:04,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012372522] [2021-01-06 16:51:04,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:51:04,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:04,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:51:04,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:51:04,868 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 17 states. [2021-01-06 16:51:04,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:04,918 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-01-06 16:51:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:51:04,918 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2021-01-06 16:51:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:04,919 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:51:04,919 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 16:51:04,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:51:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 16:51:04,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 16:51:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:51:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-01-06 16:51:04,926 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 38 [2021-01-06 16:51:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:04,926 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-01-06 16:51:04,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:51:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-01-06 16:51:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:51:04,927 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:04,927 INFO L422 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:05,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:51:05,143 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:05,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1846662730, now seen corresponding path program 11 times [2021-01-06 16:51:05,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:05,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646801476] [2021-01-06 16:51:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:51:05,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646801476] [2021-01-06 16:51:05,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045729237] [2021-01-06 16:51:05,327 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 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 16:51:05,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 16:51:05,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:05,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:51:05,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:51:05,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:05,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:51:05,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677137210] [2021-01-06 16:51:05,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:51:05,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:05,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:51:05,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:51:05,473 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 18 states. [2021-01-06 16:51:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:05,532 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-01-06 16:51:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:51:05,533 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2021-01-06 16:51:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:05,534 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:51:05,534 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 16:51:05,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 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 16:51:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 16:51:05,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-06 16:51:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:51:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-01-06 16:51:05,540 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 40 [2021-01-06 16:51:05,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:05,541 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-01-06 16:51:05,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:51:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-01-06 16:51:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:51:05,542 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:05,542 INFO L422 BasicCegarLoop]: trace histogram [18, 15, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:05,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:51:05,756 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:05,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:05,757 INFO L82 PathProgramCache]: Analyzing trace with hash 172515501, now seen corresponding path program 12 times [2021-01-06 16:51:05,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:05,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496366756] [2021-01-06 16:51:05,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 80 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:51:05,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496366756] [2021-01-06 16:51:05,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499629982] [2021-01-06 16:51:05,962 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 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 16:51:06,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 16:51:06,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:06,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:51:06,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 105 proven. 9 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 16:51:06,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:06,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2021-01-06 16:51:06,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520213751] [2021-01-06 16:51:06,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:51:06,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:06,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:51:06,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:51:06,136 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 22 states. [2021-01-06 16:51:06,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:06,222 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-01-06 16:51:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:51:06,222 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2021-01-06 16:51:06,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:06,223 INFO L225 Difference]: With dead ends: 59 [2021-01-06 16:51:06,223 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:51:06,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:51:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:51:06,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-01-06 16:51:06,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:51:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-01-06 16:51:06,230 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2021-01-06 16:51:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:06,230 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-01-06 16:51:06,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:51:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-01-06 16:51:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:51:06,231 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:06,231 INFO L422 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:06,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:51:06,445 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:06,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:06,446 INFO L82 PathProgramCache]: Analyzing trace with hash -870062923, now seen corresponding path program 13 times [2021-01-06 16:51:06,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:06,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803570256] [2021-01-06 16:51:06,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:51:06,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803570256] [2021-01-06 16:51:06,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149964910] [2021-01-06 16:51:06,702 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 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 16:51:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:06,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:51:06,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:51:06,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:06,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:51:06,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711227351] [2021-01-06 16:51:06,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:51:06,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:06,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:51:06,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:51:06,878 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 20 states. [2021-01-06 16:51:06,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:06,942 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-01-06 16:51:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:51:06,942 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2021-01-06 16:51:06,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:06,943 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:51:06,943 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 16:51:06,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:51:06,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 16:51:06,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-01-06 16:51:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:51:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-01-06 16:51:06,950 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 46 [2021-01-06 16:51:06,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:06,950 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-01-06 16:51:06,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:51:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-01-06 16:51:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:51:06,951 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:06,951 INFO L422 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:07,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:07,162 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:07,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2027149528, now seen corresponding path program 14 times [2021-01-06 16:51:07,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:07,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35102888] [2021-01-06 16:51:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:51:07,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35102888] [2021-01-06 16:51:07,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38178581] [2021-01-06 16:51:07,435 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 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 16:51:07,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:07,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:07,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:51:07,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:51:07,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:07,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:51:07,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973906625] [2021-01-06 16:51:07,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:51:07,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:07,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:51:07,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:51:07,582 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 21 states. [2021-01-06 16:51:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:07,657 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-01-06 16:51:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:51:07,658 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2021-01-06 16:51:07,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:07,659 INFO L225 Difference]: With dead ends: 64 [2021-01-06 16:51:07,659 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 16:51:07,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:51:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 16:51:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 16:51:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 16:51:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-01-06 16:51:07,674 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 48 [2021-01-06 16:51:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:07,674 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-01-06 16:51:07,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:51:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-01-06 16:51:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 16:51:07,675 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:07,675 INFO L422 BasicCegarLoop]: trace histogram [22, 18, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:07,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:51:07,881 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:07,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:07,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1185460165, now seen corresponding path program 15 times [2021-01-06 16:51:07,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:07,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968530630] [2021-01-06 16:51:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 133 proven. 342 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:51:08,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968530630] [2021-01-06 16:51:08,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762367985] [2021-01-06 16:51:08,168 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 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 16:51:08,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:51:08,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:08,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:51:08,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 162 proven. 16 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-01-06 16:51:08,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:08,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7] total 26 [2021-01-06 16:51:08,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317068957] [2021-01-06 16:51:08,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:51:08,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:08,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:51:08,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:51:08,387 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 26 states. [2021-01-06 16:51:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:08,493 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2021-01-06 16:51:08,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:51:08,493 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2021-01-06 16:51:08,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:08,494 INFO L225 Difference]: With dead ends: 69 [2021-01-06 16:51:08,494 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 16:51:08,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:51:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 16:51:08,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-01-06 16:51:08,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:51:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-01-06 16:51:08,501 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 50 [2021-01-06 16:51:08,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:08,501 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-01-06 16:51:08,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:51:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-01-06 16:51:08,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 16:51:08,502 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:08,502 INFO L422 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:08,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:08,718 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:08,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:08,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1656515133, now seen corresponding path program 16 times [2021-01-06 16:51:08,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:08,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633653734] [2021-01-06 16:51:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:51:09,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633653734] [2021-01-06 16:51:09,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116801094] [2021-01-06 16:51:09,085 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 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 16:51:09,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:09,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:09,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:51:09,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:51:09,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:09,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:51:09,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762184726] [2021-01-06 16:51:09,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:51:09,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:09,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:51:09,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:51:09,227 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 23 states. [2021-01-06 16:51:09,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:09,295 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2021-01-06 16:51:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:51:09,296 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2021-01-06 16:51:09,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:09,298 INFO L225 Difference]: With dead ends: 72 [2021-01-06 16:51:09,298 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 16:51:09,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:51:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 16:51:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 16:51:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 16:51:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-01-06 16:51:09,313 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 54 [2021-01-06 16:51:09,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:09,313 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-01-06 16:51:09,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:51:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-01-06 16:51:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 16:51:09,314 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:09,314 INFO L422 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:09,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:09,528 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:09,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1441089818, now seen corresponding path program 17 times [2021-01-06 16:51:09,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:09,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405473005] [2021-01-06 16:51:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:51:09,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405473005] [2021-01-06 16:51:09,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14731487] [2021-01-06 16:51:09,885 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 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 16:51:09,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-01-06 16:51:09,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:09,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:51:09,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:51:10,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:10,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:51:10,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176940399] [2021-01-06 16:51:10,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:51:10,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:10,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:51:10,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:51:10,035 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 24 states. [2021-01-06 16:51:10,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:10,116 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-01-06 16:51:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:51:10,117 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2021-01-06 16:51:10,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:10,117 INFO L225 Difference]: With dead ends: 74 [2021-01-06 16:51:10,117 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 16:51:10,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:51:10,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 16:51:10,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-01-06 16:51:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 16:51:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-01-06 16:51:10,123 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 56 [2021-01-06 16:51:10,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:10,124 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-01-06 16:51:10,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:51:10,124 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-01-06 16:51:10,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 16:51:10,124 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:10,124 INFO L422 BasicCegarLoop]: trace histogram [26, 21, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:10,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:51:10,340 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:10,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:10,341 INFO L82 PathProgramCache]: Analyzing trace with hash -575792311, now seen corresponding path program 18 times [2021-01-06 16:51:10,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:10,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548496744] [2021-01-06 16:51:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 198 proven. 462 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:51:10,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548496744] [2021-01-06 16:51:10,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857768799] [2021-01-06 16:51:10,698 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 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 16:51:10,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-01-06 16:51:10,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:10,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:51:10,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 231 proven. 25 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-01-06 16:51:10,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:10,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8] total 30 [2021-01-06 16:51:10,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141614392] [2021-01-06 16:51:10,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:51:10,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:10,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:51:10,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:51:10,973 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 30 states. [2021-01-06 16:51:11,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:11,101 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2021-01-06 16:51:11,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:51:11,104 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2021-01-06 16:51:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:11,105 INFO L225 Difference]: With dead ends: 79 [2021-01-06 16:51:11,105 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 16:51:11,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:51:11,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 16:51:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-01-06 16:51:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 16:51:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2021-01-06 16:51:11,111 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 58 [2021-01-06 16:51:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:11,111 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2021-01-06 16:51:11,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:51:11,112 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2021-01-06 16:51:11,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 16:51:11,112 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:11,112 INFO L422 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:11,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:11,327 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:11,328 INFO L82 PathProgramCache]: Analyzing trace with hash -429571503, now seen corresponding path program 19 times [2021-01-06 16:51:11,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:11,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009812077] [2021-01-06 16:51:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:51:11,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009812077] [2021-01-06 16:51:11,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95867587] [2021-01-06 16:51:11,719 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 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 16:51:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:11,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:51:11,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:51:11,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:11,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 16:51:11,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250045005] [2021-01-06 16:51:11,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:51:11,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:51:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:51:11,889 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 26 states. [2021-01-06 16:51:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:11,984 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-01-06 16:51:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:51:11,985 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2021-01-06 16:51:11,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:11,986 INFO L225 Difference]: With dead ends: 82 [2021-01-06 16:51:11,986 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 16:51:11,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:51:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 16:51:11,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-01-06 16:51:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 16:51:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-01-06 16:51:11,991 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 62 [2021-01-06 16:51:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:11,992 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-01-06 16:51:11,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:51:11,992 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-01-06 16:51:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 16:51:11,992 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:11,993 INFO L422 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:12,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:51:12,207 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1139183732, now seen corresponding path program 20 times [2021-01-06 16:51:12,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:12,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240296962] [2021-01-06 16:51:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:51:12,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240296962] [2021-01-06 16:51:12,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520652041] [2021-01-06 16:51:12,631 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 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 16:51:12,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:12,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:12,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:51:12,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:51:12,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:12,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:51:12,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752117578] [2021-01-06 16:51:12,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:51:12,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:12,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:51:12,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:51:12,807 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 27 states. [2021-01-06 16:51:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:12,909 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-01-06 16:51:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:51:12,909 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2021-01-06 16:51:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:12,910 INFO L225 Difference]: With dead ends: 84 [2021-01-06 16:51:12,910 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 16:51:12,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:51:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 16:51:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-01-06 16:51:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:51:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-01-06 16:51:12,920 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 64 [2021-01-06 16:51:12,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:12,920 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-01-06 16:51:12,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:51:12,920 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-01-06 16:51:12,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 16:51:12,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:12,921 INFO L422 BasicCegarLoop]: trace histogram [30, 24, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:13,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 16:51:13,136 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:13,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:13,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1179443671, now seen corresponding path program 21 times [2021-01-06 16:51:13,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:13,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984320850] [2021-01-06 16:51:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 275 proven. 600 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:51:13,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984320850] [2021-01-06 16:51:13,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990068190] [2021-01-06 16:51:13,569 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 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 16:51:13,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-01-06 16:51:13,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:13,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:51:13,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 312 proven. 36 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-01-06 16:51:13,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:13,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9] total 34 [2021-01-06 16:51:13,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163885959] [2021-01-06 16:51:13,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:51:13,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:13,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:51:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:51:13,905 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 34 states. [2021-01-06 16:51:14,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:14,056 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2021-01-06 16:51:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:51:14,057 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2021-01-06 16:51:14,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:14,057 INFO L225 Difference]: With dead ends: 89 [2021-01-06 16:51:14,058 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 16:51:14,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:51:14,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 16:51:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-01-06 16:51:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 16:51:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-01-06 16:51:14,063 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 66 [2021-01-06 16:51:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:14,063 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-01-06 16:51:14,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:51:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-01-06 16:51:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 16:51:14,064 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:14,064 INFO L422 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:14,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:14,277 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:14,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1006564769, now seen corresponding path program 22 times [2021-01-06 16:51:14,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:14,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844995153] [2021-01-06 16:51:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:51:14,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844995153] [2021-01-06 16:51:14,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410030422] [2021-01-06 16:51:14,732 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 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 16:51:14,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:14,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:14,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:51:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:51:14,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:14,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:51:14,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471601491] [2021-01-06 16:51:14,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:51:14,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:14,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:51:14,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:51:14,884 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 29 states. [2021-01-06 16:51:15,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:15,001 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2021-01-06 16:51:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:51:15,001 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2021-01-06 16:51:15,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:15,002 INFO L225 Difference]: With dead ends: 92 [2021-01-06 16:51:15,002 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 16:51:15,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:51:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 16:51:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-01-06 16:51:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:51:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2021-01-06 16:51:15,007 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 70 [2021-01-06 16:51:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:15,007 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2021-01-06 16:51:15,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:51:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2021-01-06 16:51:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 16:51:15,008 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:15,008 INFO L422 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:15,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 16:51:15,222 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:15,223 INFO L82 PathProgramCache]: Analyzing trace with hash 800032130, now seen corresponding path program 23 times [2021-01-06 16:51:15,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:15,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785413948] [2021-01-06 16:51:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:51:15,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785413948] [2021-01-06 16:51:15,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114068159] [2021-01-06 16:51:15,711 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 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 16:51:15,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-01-06 16:51:15,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:15,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:51:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:51:15,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:15,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 16:51:15,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347378599] [2021-01-06 16:51:15,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:51:15,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:15,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:51:15,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:51:15,880 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 30 states. [2021-01-06 16:51:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:15,988 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-01-06 16:51:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:51:15,988 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2021-01-06 16:51:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:15,989 INFO L225 Difference]: With dead ends: 94 [2021-01-06 16:51:15,989 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 16:51:15,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:51:15,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 16:51:15,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-01-06 16:51:15,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 16:51:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-01-06 16:51:15,994 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 72 [2021-01-06 16:51:15,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:15,995 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-01-06 16:51:15,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:51:15,995 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-01-06 16:51:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 16:51:15,996 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:15,996 INFO L422 BasicCegarLoop]: trace histogram [34, 27, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:16,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:16,209 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:16,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:16,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1772864485, now seen corresponding path program 24 times [2021-01-06 16:51:16,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:16,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677336253] [2021-01-06 16:51:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 364 proven. 756 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:51:16,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677336253] [2021-01-06 16:51:16,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121282215] [2021-01-06 16:51:16,767 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 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 16:51:16,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 16:51:16,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:16,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:51:16,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 405 proven. 49 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2021-01-06 16:51:17,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:17,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10] total 38 [2021-01-06 16:51:17,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590128936] [2021-01-06 16:51:17,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:51:17,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:17,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:51:17,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:51:17,224 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 38 states. [2021-01-06 16:51:17,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:17,410 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2021-01-06 16:51:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:51:17,411 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2021-01-06 16:51:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:17,413 INFO L225 Difference]: With dead ends: 99 [2021-01-06 16:51:17,413 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 16:51:17,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:51:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 16:51:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-01-06 16:51:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:51:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-01-06 16:51:17,419 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 74 [2021-01-06 16:51:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:17,419 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-01-06 16:51:17,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:51:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-01-06 16:51:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 16:51:17,420 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:17,420 INFO L422 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:17,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:51:17,634 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:17,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:17,635 INFO L82 PathProgramCache]: Analyzing trace with hash -66646547, now seen corresponding path program 25 times [2021-01-06 16:51:17,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:17,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371860689] [2021-01-06 16:51:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:51:18,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371860689] [2021-01-06 16:51:18,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890213338] [2021-01-06 16:51:18,169 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 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 16:51:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:18,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:51:18,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:51:18,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:18,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 16:51:18,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959432695] [2021-01-06 16:51:18,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:51:18,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:18,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:51:18,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:51:18,341 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 32 states. [2021-01-06 16:51:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:18,452 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2021-01-06 16:51:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:51:18,453 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2021-01-06 16:51:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:18,454 INFO L225 Difference]: With dead ends: 102 [2021-01-06 16:51:18,454 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 16:51:18,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:51:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 16:51:18,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-01-06 16:51:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 16:51:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-01-06 16:51:18,458 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 78 [2021-01-06 16:51:18,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:18,459 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-01-06 16:51:18,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:51:18,459 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-01-06 16:51:18,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 16:51:18,460 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:18,460 INFO L422 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:18,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:51:18,674 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:18,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:18,675 INFO L82 PathProgramCache]: Analyzing trace with hash 6665744, now seen corresponding path program 26 times [2021-01-06 16:51:18,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:18,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062135100] [2021-01-06 16:51:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:51:19,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062135100] [2021-01-06 16:51:19,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140477863] [2021-01-06 16:51:19,322 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 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 16:51:19,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:19,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:19,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:51:19,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:51:19,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:19,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:51:19,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044228504] [2021-01-06 16:51:19,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:51:19,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:19,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:51:19,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:51:19,491 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 33 states. [2021-01-06 16:51:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:19,583 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2021-01-06 16:51:19,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:51:19,584 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2021-01-06 16:51:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:19,585 INFO L225 Difference]: With dead ends: 104 [2021-01-06 16:51:19,585 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 16:51:19,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:51:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 16:51:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-01-06 16:51:19,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 16:51:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-01-06 16:51:19,590 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 80 [2021-01-06 16:51:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:19,590 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-01-06 16:51:19,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:51:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-01-06 16:51:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 16:51:19,591 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:19,591 INFO L422 BasicCegarLoop]: trace histogram [38, 30, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:19,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:19,806 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:19,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:19,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1740300659, now seen corresponding path program 27 times [2021-01-06 16:51:19,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:19,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394065426] [2021-01-06 16:51:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 16:51:20,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394065426] [2021-01-06 16:51:20,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330787379] [2021-01-06 16:51:20,424 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 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 16:51:20,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 16:51:20,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:20,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:51:20,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 510 proven. 64 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-01-06 16:51:20,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:20,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 11] total 42 [2021-01-06 16:51:20,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033170354] [2021-01-06 16:51:20,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:51:20,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:20,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:51:20,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:51:20,913 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 42 states. [2021-01-06 16:51:21,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:21,112 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2021-01-06 16:51:21,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:51:21,113 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2021-01-06 16:51:21,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:21,114 INFO L225 Difference]: With dead ends: 109 [2021-01-06 16:51:21,114 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 16:51:21,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:51:21,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 16:51:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-01-06 16:51:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:51:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2021-01-06 16:51:21,120 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 82 [2021-01-06 16:51:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:21,120 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2021-01-06 16:51:21,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:51:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2021-01-06 16:51:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 16:51:21,121 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:21,121 INFO L422 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:21,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:21,335 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:21,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2145348859, now seen corresponding path program 28 times [2021-01-06 16:51:21,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:21,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488330547] [2021-01-06 16:51:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:51:22,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488330547] [2021-01-06 16:51:22,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082681566] [2021-01-06 16:51:22,056 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 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 16:51:22,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:22,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:22,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:51:22,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:51:22,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:22,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:51:22,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971158069] [2021-01-06 16:51:22,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:51:22,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:22,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:51:22,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:51:22,248 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand 35 states. [2021-01-06 16:51:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:22,378 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-01-06 16:51:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:51:22,379 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2021-01-06 16:51:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:22,380 INFO L225 Difference]: With dead ends: 112 [2021-01-06 16:51:22,380 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 16:51:22,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:51:22,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 16:51:22,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-01-06 16:51:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 16:51:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2021-01-06 16:51:22,384 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 86 [2021-01-06 16:51:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:22,384 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2021-01-06 16:51:22,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:51:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2021-01-06 16:51:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 16:51:22,385 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:22,385 INFO L422 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:22,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 16:51:22,586 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:22,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:22,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1953579550, now seen corresponding path program 29 times [2021-01-06 16:51:22,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:22,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967259972] [2021-01-06 16:51:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:51:23,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967259972] [2021-01-06 16:51:23,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096610692] [2021-01-06 16:51:23,349 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 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 16:51:23,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 16:51:23,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:23,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:51:23,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:51:23,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:23,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 16:51:23,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359127436] [2021-01-06 16:51:23,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:51:23,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:23,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:51:23,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:51:23,576 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 36 states. [2021-01-06 16:51:23,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:23,737 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2021-01-06 16:51:23,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:51:23,738 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 88 [2021-01-06 16:51:23,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:23,739 INFO L225 Difference]: With dead ends: 114 [2021-01-06 16:51:23,739 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 16:51:23,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:51:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 16:51:23,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-01-06 16:51:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 16:51:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-01-06 16:51:23,744 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 88 [2021-01-06 16:51:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:23,744 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-01-06 16:51:23,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:51:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-01-06 16:51:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 16:51:23,745 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:23,745 INFO L422 BasicCegarLoop]: trace histogram [42, 33, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:23,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:23,961 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:23,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:23,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1948099967, now seen corresponding path program 30 times [2021-01-06 16:51:23,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:23,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170384427] [2021-01-06 16:51:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 578 proven. 1122 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:51:24,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170384427] [2021-01-06 16:51:24,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486653979] [2021-01-06 16:51:24,646 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 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 16:51:24,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-01-06 16:51:24,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:24,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:51:24,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 627 proven. 81 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-01-06 16:51:25,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:25,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 12] total 46 [2021-01-06 16:51:25,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319408177] [2021-01-06 16:51:25,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:51:25,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:25,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:51:25,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:51:25,306 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 46 states. [2021-01-06 16:51:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:25,515 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2021-01-06 16:51:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:51:25,517 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2021-01-06 16:51:25,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:25,518 INFO L225 Difference]: With dead ends: 119 [2021-01-06 16:51:25,518 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 16:51:25,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:51:25,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 16:51:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-01-06 16:51:25,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 16:51:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2021-01-06 16:51:25,524 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 90 [2021-01-06 16:51:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:25,524 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2021-01-06 16:51:25,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:51:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2021-01-06 16:51:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 16:51:25,525 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:25,526 INFO L422 BasicCegarLoop]: trace histogram [44, 34, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:25,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 16:51:25,740 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:25,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:25,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1852458889, now seen corresponding path program 31 times [2021-01-06 16:51:25,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:25,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637913389] [2021-01-06 16:51:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:51:26,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637913389] [2021-01-06 16:51:26,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32693538] [2021-01-06 16:51:26,539 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:26,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:51:26,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:51:26,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:26,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 16:51:26,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228203346] [2021-01-06 16:51:26,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:51:26,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:26,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:51:26,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:51:26,728 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 38 states. [2021-01-06 16:51:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:26,868 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2021-01-06 16:51:26,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:51:26,869 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 94 [2021-01-06 16:51:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:26,870 INFO L225 Difference]: With dead ends: 122 [2021-01-06 16:51:26,870 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 16:51:26,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:51:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 16:51:26,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-01-06 16:51:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 16:51:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2021-01-06 16:51:26,875 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 94 [2021-01-06 16:51:26,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:26,875 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2021-01-06 16:51:26,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:51:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2021-01-06 16:51:26,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 16:51:26,876 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:26,876 INFO L422 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:27,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:51:27,091 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:27,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:27,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2008172972, now seen corresponding path program 32 times [2021-01-06 16:51:27,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:27,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267572538] [2021-01-06 16:51:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:51:27,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267572538] [2021-01-06 16:51:27,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495402404] [2021-01-06 16:51:27,925 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:27,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:27,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:27,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:51:27,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:51:28,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:28,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:51:28,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332246387] [2021-01-06 16:51:28,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:51:28,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:28,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:51:28,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:51:28,102 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 39 states. [2021-01-06 16:51:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:28,257 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-01-06 16:51:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:51:28,258 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 96 [2021-01-06 16:51:28,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:28,259 INFO L225 Difference]: With dead ends: 124 [2021-01-06 16:51:28,259 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 16:51:28,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:51:28,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 16:51:28,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-01-06 16:51:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 16:51:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-01-06 16:51:28,264 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 96 [2021-01-06 16:51:28,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:28,264 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-01-06 16:51:28,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:51:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-01-06 16:51:28,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 16:51:28,266 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:28,266 INFO L422 BasicCegarLoop]: trace histogram [46, 36, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:28,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 16:51:28,480 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:28,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1325551375, now seen corresponding path program 33 times [2021-01-06 16:51:28,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:28,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600093833] [2021-01-06 16:51:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 703 proven. 1332 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:51:29,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600093833] [2021-01-06 16:51:29,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594617680] [2021-01-06 16:51:29,378 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:29,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 16:51:29,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:29,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:51:29,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 756 proven. 100 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2021-01-06 16:51:30,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:30,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2021-01-06 16:51:30,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747874801] [2021-01-06 16:51:30,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 16:51:30,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:30,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 16:51:30,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:51:30,174 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 50 states. [2021-01-06 16:51:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:30,421 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2021-01-06 16:51:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 16:51:30,422 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2021-01-06 16:51:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:30,423 INFO L225 Difference]: With dead ends: 129 [2021-01-06 16:51:30,423 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 16:51:30,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:51:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 16:51:30,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-01-06 16:51:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 16:51:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2021-01-06 16:51:30,430 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 98 [2021-01-06 16:51:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:30,430 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2021-01-06 16:51:30,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 16:51:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2021-01-06 16:51:30,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 16:51:30,431 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:30,431 INFO L422 BasicCegarLoop]: trace histogram [48, 37, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:30,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:51:30,643 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:30,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1778401897, now seen corresponding path program 34 times [2021-01-06 16:51:30,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:30,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022746900] [2021-01-06 16:51:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:51:31,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022746900] [2021-01-06 16:51:31,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790765354] [2021-01-06 16:51:31,634 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:31,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:31,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:51:31,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:51:31,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:31,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:51:31,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157917707] [2021-01-06 16:51:31,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:51:31,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:31,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:51:31,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:51:31,832 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand 41 states. [2021-01-06 16:51:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:31,996 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2021-01-06 16:51:31,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:51:31,997 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 102 [2021-01-06 16:51:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:31,998 INFO L225 Difference]: With dead ends: 132 [2021-01-06 16:51:31,998 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 16:51:31,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:51:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 16:51:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-01-06 16:51:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 16:51:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-01-06 16:51:32,004 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 102 [2021-01-06 16:51:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:32,004 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-01-06 16:51:32,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:51:32,004 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-01-06 16:51:32,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 16:51:32,005 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:32,005 INFO L422 BasicCegarLoop]: trace histogram [49, 38, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:32,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:51:32,219 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:32,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1518277446, now seen corresponding path program 35 times [2021-01-06 16:51:32,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:32,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512307107] [2021-01-06 16:51:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:51:33,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512307107] [2021-01-06 16:51:33,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808315144] [2021-01-06 16:51:33,202 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:33,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2021-01-06 16:51:33,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:33,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:51:33,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:51:33,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:33,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 16:51:33,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918126321] [2021-01-06 16:51:33,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:51:33,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:33,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:51:33,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:51:33,430 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand 42 states. [2021-01-06 16:51:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:33,588 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2021-01-06 16:51:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:51:33,589 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 104 [2021-01-06 16:51:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:33,590 INFO L225 Difference]: With dead ends: 134 [2021-01-06 16:51:33,590 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 16:51:33,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:51:33,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 16:51:33,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-01-06 16:51:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 16:51:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2021-01-06 16:51:33,596 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 104 [2021-01-06 16:51:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:33,596 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2021-01-06 16:51:33,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:51:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2021-01-06 16:51:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 16:51:33,597 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:33,597 INFO L422 BasicCegarLoop]: trace histogram [50, 39, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:33,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:51:33,812 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:33,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:33,812 INFO L82 PathProgramCache]: Analyzing trace with hash -646783203, now seen corresponding path program 36 times [2021-01-06 16:51:33,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:33,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248304526] [2021-01-06 16:51:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 840 proven. 1560 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:51:34,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248304526] [2021-01-06 16:51:34,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715860513] [2021-01-06 16:51:34,859 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:34,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-01-06 16:51:34,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:34,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:51:34,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 897 proven. 121 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-01-06 16:51:35,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:35,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2021-01-06 16:51:35,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793806715] [2021-01-06 16:51:35,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 16:51:35,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:35,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 16:51:35,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:51:35,748 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 54 states. [2021-01-06 16:51:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:36,045 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2021-01-06 16:51:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:51:36,046 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2021-01-06 16:51:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:36,047 INFO L225 Difference]: With dead ends: 139 [2021-01-06 16:51:36,047 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 16:51:36,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:51:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 16:51:36,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-01-06 16:51:36,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 16:51:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2021-01-06 16:51:36,053 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 106 [2021-01-06 16:51:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:36,054 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2021-01-06 16:51:36,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 16:51:36,054 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2021-01-06 16:51:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 16:51:36,054 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:36,055 INFO L422 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:36,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:51:36,267 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:36,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:36,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1987047205, now seen corresponding path program 37 times [2021-01-06 16:51:36,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:36,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789477907] [2021-01-06 16:51:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 16:51:37,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789477907] [2021-01-06 16:51:37,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313306385] [2021-01-06 16:51:37,369 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:37,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:51:37,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 16:51:37,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:37,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 16:51:37,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787227262] [2021-01-06 16:51:37,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:51:37,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:37,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:51:37,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:51:37,582 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 44 states. [2021-01-06 16:51:37,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:37,720 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2021-01-06 16:51:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:51:37,720 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 110 [2021-01-06 16:51:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:37,721 INFO L225 Difference]: With dead ends: 142 [2021-01-06 16:51:37,721 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 16:51:37,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:51:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 16:51:37,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-01-06 16:51:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 16:51:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2021-01-06 16:51:37,726 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 110 [2021-01-06 16:51:37,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:37,727 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2021-01-06 16:51:37,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:51:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2021-01-06 16:51:37,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 16:51:37,728 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:37,728 INFO L422 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:37,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:37,942 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:37,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1252870984, now seen corresponding path program 38 times [2021-01-06 16:51:37,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:37,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876711969] [2021-01-06 16:51:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 16:51:38,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876711969] [2021-01-06 16:51:38,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613958034] [2021-01-06 16:51:38,989 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:39,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:39,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:39,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:51:39,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 16:51:39,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:39,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 16:51:39,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211392455] [2021-01-06 16:51:39,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:51:39,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:39,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:51:39,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:51:39,200 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 45 states. [2021-01-06 16:51:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:39,384 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2021-01-06 16:51:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:51:39,384 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 112 [2021-01-06 16:51:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:39,385 INFO L225 Difference]: With dead ends: 144 [2021-01-06 16:51:39,385 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 16:51:39,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:51:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 16:51:39,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-01-06 16:51:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 16:51:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-01-06 16:51:39,391 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 112 [2021-01-06 16:51:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:39,392 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-01-06 16:51:39,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:51:39,392 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-01-06 16:51:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-01-06 16:51:39,393 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:39,393 INFO L422 BasicCegarLoop]: trace histogram [54, 42, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:39,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:39,608 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:39,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:39,608 INFO L82 PathProgramCache]: Analyzing trace with hash 84159147, now seen corresponding path program 39 times [2021-01-06 16:51:39,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:39,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607920766] [2021-01-06 16:51:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 989 proven. 1806 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 16:51:40,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607920766] [2021-01-06 16:51:40,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150080409] [2021-01-06 16:51:40,766 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:40,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-01-06 16:51:40,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:40,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:51:40,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1050 proven. 144 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-01-06 16:51:41,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:41,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 15] total 58 [2021-01-06 16:51:41,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002411190] [2021-01-06 16:51:41,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 16:51:41,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:41,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 16:51:41,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:51:41,824 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 58 states. [2021-01-06 16:51:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:42,174 INFO L93 Difference]: Finished difference Result 149 states and 177 transitions. [2021-01-06 16:51:42,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 16:51:42,175 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2021-01-06 16:51:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:42,176 INFO L225 Difference]: With dead ends: 149 [2021-01-06 16:51:42,176 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 16:51:42,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:51:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 16:51:42,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-01-06 16:51:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 16:51:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2021-01-06 16:51:42,181 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 114 [2021-01-06 16:51:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:42,182 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2021-01-06 16:51:42,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 16:51:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2021-01-06 16:51:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 16:51:42,182 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:42,183 INFO L422 BasicCegarLoop]: trace histogram [56, 43, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:42,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:42,396 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:42,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1023214541, now seen corresponding path program 40 times [2021-01-06 16:51:42,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:42,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440760437] [2021-01-06 16:51:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 16:51:43,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440760437] [2021-01-06 16:51:43,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869165191] [2021-01-06 16:51:43,556 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:43,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:43,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:43,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:51:43,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 16:51:43,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:43,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 16:51:43,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023857941] [2021-01-06 16:51:43,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:51:43,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:43,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:51:43,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:51:43,778 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand 47 states. [2021-01-06 16:51:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:43,939 INFO L93 Difference]: Finished difference Result 152 states and 179 transitions. [2021-01-06 16:51:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:51:43,939 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 118 [2021-01-06 16:51:43,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:43,942 INFO L225 Difference]: With dead ends: 152 [2021-01-06 16:51:43,942 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 16:51:43,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:51:43,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 16:51:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-01-06 16:51:43,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 16:51:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2021-01-06 16:51:43,949 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 118 [2021-01-06 16:51:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:43,950 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2021-01-06 16:51:43,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:51:43,950 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2021-01-06 16:51:43,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-01-06 16:51:43,951 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:43,951 INFO L422 BasicCegarLoop]: trace histogram [57, 44, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:44,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-06 16:51:44,166 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:44,167 INFO L82 PathProgramCache]: Analyzing trace with hash -411073194, now seen corresponding path program 41 times [2021-01-06 16:51:44,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:44,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71248105] [2021-01-06 16:51:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 16:51:45,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71248105] [2021-01-06 16:51:45,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431834709] [2021-01-06 16:51:45,400 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:45,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2021-01-06 16:51:45,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:45,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:51:45,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 16:51:45,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:45,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 16:51:45,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460191389] [2021-01-06 16:51:45,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 16:51:45,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:45,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 16:51:45,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:51:45,648 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand 48 states. [2021-01-06 16:51:45,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:45,858 INFO L93 Difference]: Finished difference Result 154 states and 181 transitions. [2021-01-06 16:51:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:51:45,859 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 120 [2021-01-06 16:51:45,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:45,860 INFO L225 Difference]: With dead ends: 154 [2021-01-06 16:51:45,860 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 16:51:45,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:51:45,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 16:51:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-01-06 16:51:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-01-06 16:51:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2021-01-06 16:51:45,866 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 120 [2021-01-06 16:51:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:45,866 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2021-01-06 16:51:45,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 16:51:45,866 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2021-01-06 16:51:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-01-06 16:51:45,867 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:45,867 INFO L422 BasicCegarLoop]: trace histogram [58, 45, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:46,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:46,081 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:46,082 INFO L82 PathProgramCache]: Analyzing trace with hash -553758279, now seen corresponding path program 42 times [2021-01-06 16:51:46,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:46,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614086813] [2021-01-06 16:51:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1150 proven. 2070 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 16:51:47,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614086813] [2021-01-06 16:51:47,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068749427] [2021-01-06 16:51:47,491 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:47,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-01-06 16:51:47,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:47,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:51:47,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1215 proven. 169 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2021-01-06 16:51:48,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:48,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 16] total 62 [2021-01-06 16:51:48,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562093086] [2021-01-06 16:51:48,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 16:51:48,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:48,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 16:51:48,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:51:48,641 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 62 states. [2021-01-06 16:51:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:48,990 INFO L93 Difference]: Finished difference Result 159 states and 189 transitions. [2021-01-06 16:51:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 16:51:48,991 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2021-01-06 16:51:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:48,992 INFO L225 Difference]: With dead ends: 159 [2021-01-06 16:51:48,992 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 16:51:48,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:51:48,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 16:51:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-01-06 16:51:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 16:51:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2021-01-06 16:51:48,998 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 122 [2021-01-06 16:51:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:48,998 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2021-01-06 16:51:48,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 16:51:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2021-01-06 16:51:48,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 16:51:48,999 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:49,000 INFO L422 BasicCegarLoop]: trace histogram [60, 46, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:49,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:49,211 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:49,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:49,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1685652673, now seen corresponding path program 43 times [2021-01-06 16:51:49,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:49,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322778726] [2021-01-06 16:51:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 16:51:50,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322778726] [2021-01-06 16:51:50,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544562174] [2021-01-06 16:51:50,584 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:50,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 16:51:50,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 16:51:50,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:50,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 16:51:50,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397814766] [2021-01-06 16:51:50,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 16:51:50,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:50,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 16:51:50,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:51:50,806 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand 50 states. [2021-01-06 16:51:51,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:51,024 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2021-01-06 16:51:51,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 16:51:51,025 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 126 [2021-01-06 16:51:51,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:51,026 INFO L225 Difference]: With dead ends: 162 [2021-01-06 16:51:51,026 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 16:51:51,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:51:51,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 16:51:51,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-01-06 16:51:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-01-06 16:51:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2021-01-06 16:51:51,031 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 126 [2021-01-06 16:51:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:51,031 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2021-01-06 16:51:51,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 16:51:51,031 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2021-01-06 16:51:51,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-01-06 16:51:51,032 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:51,032 INFO L422 BasicCegarLoop]: trace histogram [61, 47, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:51,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 16:51:51,246 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:51,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:51,247 INFO L82 PathProgramCache]: Analyzing trace with hash 834124516, now seen corresponding path program 44 times [2021-01-06 16:51:51,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:51,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051922633] [2021-01-06 16:51:51,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 16:51:52,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051922633] [2021-01-06 16:51:52,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568601581] [2021-01-06 16:51:52,674 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:52,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:52,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:52,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 16:51:52,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 16:51:52,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:52,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 16:51:52,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582804345] [2021-01-06 16:51:52,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:51:52,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:52,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:51:52,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:51:52,902 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand 51 states. [2021-01-06 16:51:53,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:53,132 INFO L93 Difference]: Finished difference Result 164 states and 193 transitions. [2021-01-06 16:51:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 16:51:53,133 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 128 [2021-01-06 16:51:53,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:53,134 INFO L225 Difference]: With dead ends: 164 [2021-01-06 16:51:53,134 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 16:51:53,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:51:53,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 16:51:53,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-01-06 16:51:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 16:51:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2021-01-06 16:51:53,141 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 128 [2021-01-06 16:51:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:53,142 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2021-01-06 16:51:53,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:51:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2021-01-06 16:51:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 16:51:53,143 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:53,143 INFO L422 BasicCegarLoop]: trace histogram [62, 48, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:53,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 16:51:53,358 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:53,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1440648121, now seen corresponding path program 45 times [2021-01-06 16:51:53,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:53,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564859150] [2021-01-06 16:51:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1323 proven. 2352 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 16:51:54,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564859150] [2021-01-06 16:51:54,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286854184] [2021-01-06 16:51:54,907 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:54,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-01-06 16:51:54,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:54,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:51:54,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1392 proven. 196 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2021-01-06 16:51:56,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:56,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 17] total 66 [2021-01-06 16:51:56,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841480795] [2021-01-06 16:51:56,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 16:51:56,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:56,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 16:51:56,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:51:56,242 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand 66 states. [2021-01-06 16:51:56,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:56,659 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2021-01-06 16:51:56,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 16:51:56,659 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2021-01-06 16:51:56,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:56,661 INFO L225 Difference]: With dead ends: 169 [2021-01-06 16:51:56,661 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 16:51:56,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:51:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 16:51:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-01-06 16:51:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-01-06 16:51:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2021-01-06 16:51:56,667 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 130 [2021-01-06 16:51:56,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:56,668 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2021-01-06 16:51:56,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 16:51:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2021-01-06 16:51:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-01-06 16:51:56,669 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:56,669 INFO L422 BasicCegarLoop]: trace histogram [64, 49, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:56,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 16:51:56,882 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash -83220273, now seen corresponding path program 46 times [2021-01-06 16:51:56,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:56,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123372248] [2021-01-06 16:51:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 16:51:58,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123372248] [2021-01-06 16:51:58,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175205715] [2021-01-06 16:51:58,568 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:58,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:58,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:58,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:51:58,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 16:51:58,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:58,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 16:51:58,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364451335] [2021-01-06 16:51:58,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:51:58,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:58,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:51:58,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:51:58,797 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand 53 states. [2021-01-06 16:51:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:59,030 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2021-01-06 16:51:59,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 16:51:59,031 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 134 [2021-01-06 16:51:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:59,032 INFO L225 Difference]: With dead ends: 172 [2021-01-06 16:51:59,032 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 16:51:59,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:51:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 16:51:59,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-01-06 16:51:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 16:51:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2021-01-06 16:51:59,042 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 134 [2021-01-06 16:51:59,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:59,042 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2021-01-06 16:51:59,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:51:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2021-01-06 16:51:59,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 16:51:59,043 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:59,043 INFO L422 BasicCegarLoop]: trace histogram [65, 50, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:59,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:59,258 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:59,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:59,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1769075726, now seen corresponding path program 47 times [2021-01-06 16:51:59,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:59,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670497316] [2021-01-06 16:51:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:02,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670497316] [2021-01-06 16:52:02,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197515015] [2021-01-06 16:52:02,059 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:02,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-01-06 16:52:02,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:02,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:52:02,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 1024 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-01-06 16:52:03,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:03,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 35] total 85 [2021-01-06 16:52:03,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795178174] [2021-01-06 16:52:03,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-01-06 16:52:03,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:03,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-01-06 16:52:03,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:52:03,921 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand 85 states. [2021-01-06 16:52:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:04,623 INFO L93 Difference]: Finished difference Result 178 states and 229 transitions. [2021-01-06 16:52:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-01-06 16:52:04,624 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 136 [2021-01-06 16:52:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:04,625 INFO L225 Difference]: With dead ends: 178 [2021-01-06 16:52:04,625 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 16:52:04,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:52:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 16:52:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-01-06 16:52:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 16:52:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 206 transitions. [2021-01-06 16:52:04,632 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 206 transitions. Word has length 136 [2021-01-06 16:52:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:04,633 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 206 transitions. [2021-01-06 16:52:04,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2021-01-06 16:52:04,633 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 206 transitions. [2021-01-06 16:52:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-01-06 16:52:04,634 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:04,634 INFO L422 BasicCegarLoop]: trace histogram [83, 50, 33, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:04,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:04,849 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:04,850 INFO L82 PathProgramCache]: Analyzing trace with hash 823112396, now seen corresponding path program 48 times [2021-01-06 16:52:04,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:04,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400790828] [2021-01-06 16:52:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:09,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400790828] [2021-01-06 16:52:09,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497458711] [2021-01-06 16:52:09,313 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:09,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2021-01-06 16:52:09,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:09,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:52:09,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3486 proven. 1681 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-01-06 16:52:10,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:10,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 44] total 94 [2021-01-06 16:52:10,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30004110] [2021-01-06 16:52:10,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-01-06 16:52:10,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:10,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-01-06 16:52:10,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 16:52:10,628 INFO L87 Difference]: Start difference. First operand 173 states and 206 transitions. Second operand 94 states. [2021-01-06 16:52:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:11,508 INFO L93 Difference]: Finished difference Result 196 states and 247 transitions. [2021-01-06 16:52:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-01-06 16:52:11,509 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 172 [2021-01-06 16:52:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:11,511 INFO L225 Difference]: With dead ends: 196 [2021-01-06 16:52:11,511 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 16:52:11,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 16:52:11,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 16:52:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-01-06 16:52:11,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-01-06 16:52:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 233 transitions. [2021-01-06 16:52:11,519 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 233 transitions. Word has length 172 [2021-01-06 16:52:11,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:11,519 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 233 transitions. [2021-01-06 16:52:11,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2021-01-06 16:52:11,519 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 233 transitions. [2021-01-06 16:52:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-01-06 16:52:11,521 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:11,521 INFO L422 BasicCegarLoop]: trace histogram [92, 50, 42, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:11,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:11,734 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:11,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:11,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1326856103, now seen corresponding path program 49 times [2021-01-06 16:52:11,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:11,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860218979] [2021-01-06 16:52:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:17,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860218979] [2021-01-06 16:52:17,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652275844] [2021-01-06 16:52:17,240 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:17,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 94 conjunts are in the unsatisfiable core [2021-01-06 16:52:17,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:17,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:17,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-01-06 16:52:17,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220602035] [2021-01-06 16:52:17,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-01-06 16:52:17,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:17,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-01-06 16:52:17,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 16:52:17,645 INFO L87 Difference]: Start difference. First operand 191 states and 233 transitions. Second operand 96 states. [2021-01-06 16:52:18,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:18,507 INFO L93 Difference]: Finished difference Result 198 states and 242 transitions. [2021-01-06 16:52:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-01-06 16:52:18,507 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2021-01-06 16:52:18,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:18,508 INFO L225 Difference]: With dead ends: 198 [2021-01-06 16:52:18,508 INFO L226 Difference]: Without dead ends: 194 [2021-01-06 16:52:18,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 16:52:18,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-01-06 16:52:18,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-01-06 16:52:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2021-01-06 16:52:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 236 transitions. [2021-01-06 16:52:18,514 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 236 transitions. Word has length 190 [2021-01-06 16:52:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:18,515 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 236 transitions. [2021-01-06 16:52:18,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2021-01-06 16:52:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 236 transitions. [2021-01-06 16:52:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-01-06 16:52:18,516 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:18,516 INFO L422 BasicCegarLoop]: trace histogram [93, 50, 43, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:18,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:18,730 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:18,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:18,731 INFO L82 PathProgramCache]: Analyzing trace with hash 548761726, now seen corresponding path program 50 times [2021-01-06 16:52:18,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:18,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494349144] [2021-01-06 16:52:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:24,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494349144] [2021-01-06 16:52:24,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224004767] [2021-01-06 16:52:24,548 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:24,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:24,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:24,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 95 conjunts are in the unsatisfiable core [2021-01-06 16:52:24,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:24,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:24,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2021-01-06 16:52:24,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994866754] [2021-01-06 16:52:24,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-01-06 16:52:24,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:24,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-01-06 16:52:24,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-01-06 16:52:24,926 INFO L87 Difference]: Start difference. First operand 193 states and 236 transitions. Second operand 97 states. [2021-01-06 16:52:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:25,728 INFO L93 Difference]: Finished difference Result 200 states and 245 transitions. [2021-01-06 16:52:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-01-06 16:52:25,728 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2021-01-06 16:52:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:25,730 INFO L225 Difference]: With dead ends: 200 [2021-01-06 16:52:25,730 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 16:52:25,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-01-06 16:52:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 16:52:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-01-06 16:52:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 16:52:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 239 transitions. [2021-01-06 16:52:25,737 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 239 transitions. Word has length 192 [2021-01-06 16:52:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:25,737 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 239 transitions. [2021-01-06 16:52:25,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2021-01-06 16:52:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 239 transitions. [2021-01-06 16:52:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-01-06 16:52:25,739 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:25,739 INFO L422 BasicCegarLoop]: trace histogram [94, 50, 44, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:25,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-01-06 16:52:25,952 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:25,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:25,953 INFO L82 PathProgramCache]: Analyzing trace with hash -868768925, now seen corresponding path program 51 times [2021-01-06 16:52:25,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:25,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103784445] [2021-01-06 16:52:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:31,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103784445] [2021-01-06 16:52:31,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590050363] [2021-01-06 16:52:31,884 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:32,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2021-01-06 16:52:32,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:32,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:52:32,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 4450 proven. 1936 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-01-06 16:52:32,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:32,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 47] total 97 [2021-01-06 16:52:32,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913633068] [2021-01-06 16:52:32,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-01-06 16:52:32,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:32,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-01-06 16:52:32,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-01-06 16:52:32,391 INFO L87 Difference]: Start difference. First operand 195 states and 239 transitions. Second operand 97 states. [2021-01-06 16:52:33,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:33,119 INFO L93 Difference]: Finished difference Result 202 states and 248 transitions. [2021-01-06 16:52:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-01-06 16:52:33,120 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 194 [2021-01-06 16:52:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:33,122 INFO L225 Difference]: With dead ends: 202 [2021-01-06 16:52:33,122 INFO L226 Difference]: Without dead ends: 198 [2021-01-06 16:52:33,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-01-06 16:52:33,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-01-06 16:52:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-01-06 16:52:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2021-01-06 16:52:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 242 transitions. [2021-01-06 16:52:33,130 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 242 transitions. Word has length 194 [2021-01-06 16:52:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:33,130 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 242 transitions. [2021-01-06 16:52:33,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2021-01-06 16:52:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 242 transitions. [2021-01-06 16:52:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-01-06 16:52:33,131 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:33,132 INFO L422 BasicCegarLoop]: trace histogram [95, 50, 45, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:33,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:33,348 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:33,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1611091704, now seen corresponding path program 52 times [2021-01-06 16:52:33,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:33,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645371033] [2021-01-06 16:52:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:39,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645371033] [2021-01-06 16:52:39,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079938592] [2021-01-06 16:52:39,442 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:39,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:39,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 97 conjunts are in the unsatisfiable core [2021-01-06 16:52:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:39,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:39,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2021-01-06 16:52:39,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284852994] [2021-01-06 16:52:39,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-01-06 16:52:39,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:39,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-01-06 16:52:39,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-01-06 16:52:39,824 INFO L87 Difference]: Start difference. First operand 197 states and 242 transitions. Second operand 99 states. [2021-01-06 16:52:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:40,664 INFO L93 Difference]: Finished difference Result 204 states and 251 transitions. [2021-01-06 16:52:40,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-01-06 16:52:40,664 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2021-01-06 16:52:40,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:40,665 INFO L225 Difference]: With dead ends: 204 [2021-01-06 16:52:40,665 INFO L226 Difference]: Without dead ends: 200 [2021-01-06 16:52:40,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-01-06 16:52:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-01-06 16:52:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-01-06 16:52:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-01-06 16:52:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 245 transitions. [2021-01-06 16:52:40,671 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 245 transitions. Word has length 196 [2021-01-06 16:52:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:40,672 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 245 transitions. [2021-01-06 16:52:40,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2021-01-06 16:52:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 245 transitions. [2021-01-06 16:52:40,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-01-06 16:52:40,673 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:40,673 INFO L422 BasicCegarLoop]: trace histogram [96, 50, 46, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:40,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 16:52:40,889 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:40,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2018711187, now seen corresponding path program 53 times [2021-01-06 16:52:40,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:40,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149014005] [2021-01-06 16:52:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:47,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149014005] [2021-01-06 16:52:47,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449948137] [2021-01-06 16:52:47,045 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:47,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2021-01-06 16:52:47,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:47,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:52:47,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 4656 proven. 2304 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2021-01-06 16:52:47,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:47,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 51] total 101 [2021-01-06 16:52:47,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793367117] [2021-01-06 16:52:47,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-01-06 16:52:47,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:47,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-01-06 16:52:47,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-01-06 16:52:47,794 INFO L87 Difference]: Start difference. First operand 199 states and 245 transitions. Second operand 101 states. [2021-01-06 16:52:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:48,707 INFO L93 Difference]: Finished difference Result 210 states and 262 transitions. [2021-01-06 16:52:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-01-06 16:52:48,707 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 198 [2021-01-06 16:52:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:48,709 INFO L225 Difference]: With dead ends: 210 [2021-01-06 16:52:48,709 INFO L226 Difference]: Without dead ends: 206 [2021-01-06 16:52:48,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-01-06 16:52:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-01-06 16:52:48,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-01-06 16:52:48,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2021-01-06 16:52:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 254 transitions. [2021-01-06 16:52:48,716 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 254 transitions. Word has length 198 [2021-01-06 16:52:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:48,716 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 254 transitions. [2021-01-06 16:52:48,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2021-01-06 16:52:48,717 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 254 transitions. [2021-01-06 16:52:48,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-01-06 16:52:48,718 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:48,718 INFO L422 BasicCegarLoop]: trace histogram [99, 50, 49, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:48,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-06 16:52:48,932 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:48,933 INFO L82 PathProgramCache]: Analyzing trace with hash -400837860, now seen corresponding path program 54 times [2021-01-06 16:52:48,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:48,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582959764] [2021-01-06 16:52:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:55,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582959764] [2021-01-06 16:52:55,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103953796] [2021-01-06 16:52:55,545 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:55,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 99 check-sat command(s) [2021-01-06 16:52:55,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:55,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:52:55,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 4950 proven. 2401 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-01-06 16:52:56,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:56,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 52] total 102 [2021-01-06 16:52:56,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653679254] [2021-01-06 16:52:56,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-01-06 16:52:56,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:56,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-01-06 16:52:56,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-01-06 16:52:56,080 INFO L87 Difference]: Start difference. First operand 205 states and 254 transitions. Second operand 102 states. [2021-01-06 16:52:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:56,975 INFO L93 Difference]: Finished difference Result 211 states and 261 transitions. [2021-01-06 16:52:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-01-06 16:52:56,976 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 204 [2021-01-06 16:52:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:56,977 INFO L225 Difference]: With dead ends: 211 [2021-01-06 16:52:56,977 INFO L226 Difference]: Without dead ends: 207 [2021-01-06 16:52:56,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-01-06 16:52:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-01-06 16:52:56,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-01-06 16:52:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-01-06 16:52:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 257 transitions. [2021-01-06 16:52:56,984 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 257 transitions. Word has length 204 [2021-01-06 16:52:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:56,985 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 257 transitions. [2021-01-06 16:52:56,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2021-01-06 16:52:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 257 transitions. [2021-01-06 16:52:56,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-01-06 16:52:56,986 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:56,986 INFO L422 BasicCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:57,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:57,201 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:57,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:57,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1394062977, now seen corresponding path program 55 times [2021-01-06 16:52:57,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:57,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484045124] [2021-01-06 16:52:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-01-06 16:52:59,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484045124] [2021-01-06 16:52:59,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566353536] [2021-01-06 16:52:59,687 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:59,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 105 conjunts are in the unsatisfiable core [2021-01-06 16:52:59,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:00,198 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:53:00,203 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:53:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-01-06 16:53:00,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:00,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-01-06 16:53:00,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321666256] [2021-01-06 16:53:00,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:53:00,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:00,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:53:00,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:53:00,372 INFO L87 Difference]: Start difference. First operand 207 states and 257 transitions. Second operand 55 states. [2021-01-06 16:53:02,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:02,432 INFO L93 Difference]: Finished difference Result 2862 states and 4237 transitions. [2021-01-06 16:53:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:53:02,433 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 206 [2021-01-06 16:53:02,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:02,447 INFO L225 Difference]: With dead ends: 2862 [2021-01-06 16:53:02,448 INFO L226 Difference]: Without dead ends: 2858 [2021-01-06 16:53:02,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:53:02,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-01-06 16:53:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 209. [2021-01-06 16:53:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-01-06 16:53:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 260 transitions. [2021-01-06 16:53:02,505 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 260 transitions. Word has length 206 [2021-01-06 16:53:02,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:02,506 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 260 transitions. [2021-01-06 16:53:02,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:53:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 260 transitions. [2021-01-06 16:53:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-01-06 16:53:02,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:02,507 INFO L422 BasicCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:02,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 16:53:02,723 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:02,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:02,724 INFO L82 PathProgramCache]: Analyzing trace with hash -283085658, now seen corresponding path program 56 times [2021-01-06 16:53:02,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:02,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400960166] [2021-01-06 16:53:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-01-06 16:53:04,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400960166] [2021-01-06 16:53:04,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:53:04,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-01-06 16:53:04,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604215837] [2021-01-06 16:53:04,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 16:53:04,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:04,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 16:53:04,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:53:04,564 INFO L87 Difference]: Start difference. First operand 209 states and 260 transitions. Second operand 52 states. [2021-01-06 16:53:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:04,831 INFO L93 Difference]: Finished difference Result 308 states and 408 transitions. [2021-01-06 16:53:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 16:53:04,832 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 208 [2021-01-06 16:53:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:04,833 INFO L225 Difference]: With dead ends: 308 [2021-01-06 16:53:04,833 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:53:04,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:53:04,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:53:04,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:53:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:53:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:53:04,834 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 208 [2021-01-06 16:53:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:04,834 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:53:04,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 16:53:04,835 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:53:04,835 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:53:04,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-01-06 16:53:04,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:53:06,062 WARN L197 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 1862 DAG size of output: 452 [2021-01-06 16:53:08,588 WARN L197 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 452 DAG size of output: 357 [2021-01-06 16:53:08,596 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:53:08,597 INFO L189 CegarLoopUtils]: For program point L27-2(lines 27 34) no Hoare annotation was computed. [2021-01-06 16:53:08,597 INFO L189 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-01-06 16:53:08,597 INFO L192 CegarLoopUtils]: At program point L36(lines 24 37) the Hoare annotation is: true [2021-01-06 16:53:08,597 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:53:08,597 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:53:08,597 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:53:08,597 INFO L189 CegarLoopUtils]: For program point L28(lines 28 33) no Hoare annotation was computed. [2021-01-06 16:53:08,600 INFO L185 CegarLoopUtils]: At program point L28-2(lines 27 34) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~x~0 70) (<= 70 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 70) (<= 70 ULTIMATE.start_main_~y~0)) (and (<= 74 ULTIMATE.start_main_~x~0) (<= 74 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 74) (<= ULTIMATE.start_main_~y~0 74)) (and (<= ULTIMATE.start_main_~y~0 71) (<= ULTIMATE.start_main_~x~0 71) (<= 71 ULTIMATE.start_main_~x~0) (<= 71 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 83) (<= ULTIMATE.start_main_~y~0 83) (<= 83 ULTIMATE.start_main_~y~0) (<= 83 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 82) (<= 82 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 82) (<= 82 ULTIMATE.start_main_~x~0)) (and (<= 96 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 96) (<= 96 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 96)) (and (<= 65 ULTIMATE.start_main_~y~0) (<= 65 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 65) (<= ULTIMATE.start_main_~y~0 65)) (and (<= 76 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 76) (<= 76 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 76)) (and (<= 85 ULTIMATE.start_main_~y~0) (<= 85 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 85) (<= ULTIMATE.start_main_~x~0 85)) (and (<= 67 ULTIMATE.start_main_~y~0) (<= 67 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 67) (<= ULTIMATE.start_main_~y~0 67)) (and (<= ULTIMATE.start_main_~y~0 57) (<= 57 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 57) (<= 57 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 80) (<= ULTIMATE.start_main_~y~0 80) (<= 80 ULTIMATE.start_main_~y~0) (<= 80 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 89) (<= ULTIMATE.start_main_~x~0 89) (<= 89 ULTIMATE.start_main_~y~0) (<= 89 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 88) (<= 88 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 88) (<= 88 ULTIMATE.start_main_~x~0)) (and (<= 75 ULTIMATE.start_main_~x~0) (<= 75 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 75) (<= ULTIMATE.start_main_~x~0 75)) (and (<= ULTIMATE.start_main_~y~0 86) (<= ULTIMATE.start_main_~x~0 86) (<= 86 ULTIMATE.start_main_~x~0) (<= 86 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 64) (<= ULTIMATE.start_main_~x~0 64) (<= 64 ULTIMATE.start_main_~x~0) (<= 64 ULTIMATE.start_main_~y~0)) (and (<= 79 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 79) (<= ULTIMATE.start_main_~y~0 79) (<= 79 ULTIMATE.start_main_~x~0)) (and (<= 77 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 77) (<= 77 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 77)) (and (<= ULTIMATE.start_main_~y~0 63) (<= 63 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 63) (<= 63 ULTIMATE.start_main_~y~0)) (and (<= 100 ULTIMATE.start_main_~x~0) (< 99 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 100)) (and (<= ULTIMATE.start_main_~y~0 98) (<= 98 ULTIMATE.start_main_~y~0) (<= 98 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 98)) (and (<= 53 ULTIMATE.start_main_~x~0) (<= 53 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 53) (<= ULTIMATE.start_main_~x~0 53)) (and (<= ULTIMATE.start_main_~y~0 78) (<= ULTIMATE.start_main_~x~0 78) (<= 78 ULTIMATE.start_main_~y~0) (<= 78 ULTIMATE.start_main_~x~0)) (and (<= 52 ULTIMATE.start_main_~x~0) (<= 52 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 52) (<= ULTIMATE.start_main_~x~0 52)) (and (<= 60 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 61) (<= ULTIMATE.start_main_~y~0 60) (<= 60 ULTIMATE.start_main_~x~0)) (and (<= 99 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 99) (<= ULTIMATE.start_main_~y~0 99) (<= 99 ULTIMATE.start_main_~x~0)) (and (<= 81 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 81) (<= ULTIMATE.start_main_~y~0 81) (<= 81 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 68) (<= ULTIMATE.start_main_~x~0 68) (<= 68 ULTIMATE.start_main_~y~0) (<= 68 ULTIMATE.start_main_~x~0)) (and (< ULTIMATE.start_main_~x~0 51) (<= ULTIMATE.start_main_~y~0 50) (<= 50 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 87) (<= 87 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 87) (<= 87 ULTIMATE.start_main_~x~0)) (and (<= 92 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 92) (<= ULTIMATE.start_main_~y~0 92) (<= 92 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 93) (<= 93 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 93) (<= 93 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 69) (<= ULTIMATE.start_main_~y~0 69) (<= 69 ULTIMATE.start_main_~x~0) (<= 69 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 51) (<= 51 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 51) (<= 51 ULTIMATE.start_main_~x~0)) (and (<= 90 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 90) (<= 90 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 90)) (and (<= 91 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 91) (<= ULTIMATE.start_main_~y~0 91) (<= 91 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 56) (<= 56 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 57) (<= 56 ULTIMATE.start_main_~x~0)) (and (<= 94 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 94) (<= ULTIMATE.start_main_~y~0 94) (<= 94 ULTIMATE.start_main_~y~0)) (and (<= 97 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 97) (<= 97 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 97)) (and (<= 55 ULTIMATE.start_main_~y~0) (<= 55 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 55) (<= ULTIMATE.start_main_~y~0 55)) (and (<= 58 ULTIMATE.start_main_~x~0) (<= 58 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 58) (< ULTIMATE.start_main_~x~0 59)) (and (<= ULTIMATE.start_main_~y~0 72) (<= 72 ULTIMATE.start_main_~y~0) (<= 72 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 72)) (and (<= 95 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 95) (<= 95 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 95)) (and (<= ULTIMATE.start_main_~x~0 73) (<= 73 ULTIMATE.start_main_~x~0) (<= 73 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 73)) (and (<= ULTIMATE.start_main_~y~0 54) (< ULTIMATE.start_main_~x~0 55) (<= 54 ULTIMATE.start_main_~y~0) (<= 54 ULTIMATE.start_main_~x~0)) (and (<= 62 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 62) (<= 62 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 62)) (and (<= ULTIMATE.start_main_~x~0 66) (<= 66 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 66) (<= 66 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 59) (<= ULTIMATE.start_main_~x~0 59) (<= 59 ULTIMATE.start_main_~x~0) (<= 59 ULTIMATE.start_main_~y~0)) (and (< ULTIMATE.start_main_~x~0 62) (<= ULTIMATE.start_main_~y~0 61) (<= 61 ULTIMATE.start_main_~x~0) (<= 61 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 84) (<= 84 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 84) (<= 84 ULTIMATE.start_main_~x~0))) [2021-01-06 16:53:08,600 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-01-06 16:53:08,600 INFO L189 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-01-06 16:53:08,600 INFO L192 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-01-06 16:53:08,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:53:08 BoogieIcfgContainer [2021-01-06 16:53:08,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:53:08,635 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:53:08,635 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:53:08,635 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:53:08,636 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:58" (3/4) ... [2021-01-06 16:53:08,648 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:53:08,659 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-01-06 16:53:08,659 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 16:53:08,659 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:53:08,659 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:53:08,696 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-lit/gj2007.i-witness.graphml [2021-01-06 16:53:08,696 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:53:08,697 INFO L168 Benchmark]: Toolchain (without parser) took 130585.54 ms. Allocated memory was 164.6 MB in the beginning and 286.3 MB in the end (delta: 121.6 MB). Free memory was 144.9 MB in the beginning and 206.6 MB in the end (delta: -61.7 MB). Peak memory consumption was 59.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:08,698 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 164.6 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:53:08,698 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.71 ms. Allocated memory is still 164.6 MB. Free memory was 144.9 MB in the beginning and 134.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:08,699 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.14 ms. Allocated memory is still 164.6 MB. Free memory was 134.7 MB in the beginning and 133.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:08,699 INFO L168 Benchmark]: Boogie Preprocessor took 43.58 ms. Allocated memory is still 164.6 MB. Free memory was 133.4 MB in the beginning and 148.3 MB in the end (delta: -14.9 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:08,699 INFO L168 Benchmark]: RCFGBuilder took 333.50 ms. Allocated memory is still 164.6 MB. Free memory was 148.3 MB in the beginning and 137.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:08,700 INFO L168 Benchmark]: TraceAbstraction took 129811.24 ms. Allocated memory was 164.6 MB in the beginning and 286.3 MB in the end (delta: 121.6 MB). Free memory was 136.8 MB in the beginning and 209.2 MB in the end (delta: -72.4 MB). Peak memory consumption was 165.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:08,700 INFO L168 Benchmark]: Witness Printer took 61.23 ms. Allocated memory is still 286.3 MB. Free memory was 209.2 MB in the beginning and 206.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:08,702 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 164.6 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.71 ms. Allocated memory is still 164.6 MB. Free memory was 144.9 MB in the beginning and 134.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.14 ms. Allocated memory is still 164.6 MB. Free memory was 134.7 MB in the beginning and 133.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.58 ms. Allocated memory is still 164.6 MB. Free memory was 133.4 MB in the beginning and 148.3 MB in the end (delta: -14.9 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 333.50 ms. Allocated memory is still 164.6 MB. Free memory was 148.3 MB in the beginning and 137.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 129811.24 ms. Allocated memory was 164.6 MB in the beginning and 286.3 MB in the end (delta: 121.6 MB). Free memory was 136.8 MB in the beginning and 209.2 MB in the end (delta: -72.4 MB). Peak memory consumption was 165.0 MB. Max. memory is 8.0 GB. * Witness Printer took 61.23 ms. Allocated memory is still 286.3 MB. Free memory was 209.2 MB in the beginning and 206.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((x <= 70 && 70 <= x) && y <= 70) && 70 <= y) || (((74 <= x && 74 <= y) && x <= 74) && y <= 74)) || (((y <= 71 && x <= 71) && 71 <= x) && 71 <= y)) || (((x <= 83 && y <= 83) && 83 <= y) && 83 <= x)) || (((y <= 82 && 82 <= y) && x <= 82) && 82 <= x)) || (((96 <= y && x <= 96) && 96 <= x) && y <= 96)) || (((65 <= y && 65 <= x) && x <= 65) && y <= 65)) || (((76 <= x && y <= 76) && 76 <= y) && x <= 76)) || (((85 <= y && 85 <= x) && y <= 85) && x <= 85)) || (((67 <= y && 67 <= x) && x <= 67) && y <= 67)) || (((y <= 57 && 57 <= y) && x <= 57) && 57 <= x)) || (((x <= 80 && y <= 80) && 80 <= y) && 80 <= x)) || (((y <= 89 && x <= 89) && 89 <= y) && 89 <= x)) || (((y <= 88 && 88 <= y) && x <= 88) && 88 <= x)) || (((75 <= x && 75 <= y) && y <= 75) && x <= 75)) || (((y <= 86 && x <= 86) && 86 <= x) && 86 <= y)) || (((y <= 64 && x <= 64) && 64 <= x) && 64 <= y)) || (((79 <= y && x <= 79) && y <= 79) && 79 <= x)) || (((77 <= y && x <= 77) && 77 <= x) && y <= 77)) || (((y <= 63 && 63 <= x) && x <= 63) && 63 <= y)) || ((100 <= x && 99 < y) && y <= 100)) || (((y <= 98 && 98 <= y) && 98 <= x) && x <= 98)) || (((53 <= x && 53 <= y) && y <= 53) && x <= 53)) || (((y <= 78 && x <= 78) && 78 <= y) && 78 <= x)) || (((52 <= x && 52 <= y) && y <= 52) && x <= 52)) || (((60 <= y && x < 61) && y <= 60) && 60 <= x)) || (((99 <= y && x <= 99) && y <= 99) && 99 <= x)) || (((81 <= y && x <= 81) && y <= 81) && 81 <= x)) || (((y <= 68 && x <= 68) && 68 <= y) && 68 <= x)) || ((x < 51 && y <= 50) && 50 <= y)) || (((x <= 87 && 87 <= y) && y <= 87) && 87 <= x)) || (((92 <= y && x <= 92) && y <= 92) && 92 <= x)) || (((y <= 93 && 93 <= x) && x <= 93) && 93 <= y)) || (((x <= 69 && y <= 69) && 69 <= x) && 69 <= y)) || (((y <= 51 && 51 <= y) && x <= 51) && 51 <= x)) || (((90 <= x && x <= 90) && 90 <= y) && y <= 90)) || (((91 <= x && x <= 91) && y <= 91) && 91 <= y)) || (((y <= 56 && 56 <= y) && x < 57) && 56 <= x)) || (((94 <= x && x <= 94) && y <= 94) && 94 <= y)) || (((97 <= x && y <= 97) && 97 <= y) && x <= 97)) || (((55 <= y && 55 <= x) && x <= 55) && y <= 55)) || (((58 <= x && 58 <= y) && y <= 58) && x < 59)) || (((y <= 72 && 72 <= y) && 72 <= x) && x <= 72)) || (((95 <= x && y <= 95) && 95 <= y) && x <= 95)) || (((x <= 73 && 73 <= x) && 73 <= y) && y <= 73)) || (((y <= 54 && x < 55) && 54 <= y) && 54 <= x)) || (((62 <= x && x <= 62) && 62 <= y) && y <= 62)) || (((x <= 66 && 66 <= x) && y <= 66) && 66 <= y)) || (((y <= 59 && x <= 59) && 59 <= x) && 59 <= y)) || (((x < 62 && y <= 61) && 61 <= x) && 61 <= y)) || (((x <= 84 && 84 <= y) && y <= 84) && 84 <= x) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 125.9s, OverallIterations: 60, TraceHistogramMax: 101, AutomataDifference: 15.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 501 SDtfs, 1345 SDslu, 10713 SDs, 0 SdLazy, 9971 SolverSat, 2021 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7207 GetRequests, 4930 SyntacticMatches, 7 SemanticMatches, 2270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2307 ImplicationChecksByTransitivity, 81.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=209occurred in iteration=59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 60 MinimizatonAttempts, 2671 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 660 HoareAnnotationTreeSize, 3 FomulaSimplifications, 15405 FormulaSimplificationTreeSizeReduction, 1.2s HoareSimplificationTime, 3 FomulaSimplificationsInter, 420 FormulaSimplificationTreeSizeReductionInter, 2.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 90.7s InterpolantComputationTime, 10346 NumberOfCodeBlocks, 9986 NumberOfCodeBlocksAsserted, 1129 NumberOfCheckSat, 10230 ConstructedInterpolants, 0 QuantifiedInterpolants, 3520977 SizeOfPredicates, 2 NumberOfNonLiveVariables, 12202 ConjunctsInSsa, 1649 ConjunctsInUnsatCore, 116 InterpolantComputations, 4 PerfectInterpolantSequences, 107648/293403 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...