/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:19:50,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:19:50,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:19:50,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:19:50,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:19:50,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:19:50,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:19:50,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:19:50,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:19:50,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:19:50,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:19:50,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:19:50,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:19:50,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:19:50,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:19:50,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:19:50,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:19:50,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:19:50,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:19:50,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:19:50,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:19:50,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:19:50,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:19:50,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:19:50,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-21 21:19:50,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-21 21:19:50,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-21 21:19:50,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-21 21:19:50,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-21 21:19:50,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-21 21:19:50,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:19:50,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:19:50,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:19:50,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:19:50,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:19:50,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:19:50,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:19:50,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:19:50,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:19:50,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:19:50,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:19:50,750 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:19:50,865 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:19:50,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:19:50,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:19:50,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:19:50,869 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:19:50,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:19:50,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:19:50,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:19:50,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:19:50,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:19:50,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:19:50,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:19:50,873 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:19:50,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:19:50,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:19:50,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:19:50,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:19:50,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:19:50,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:19:50,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:19:50,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:19:50,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:19:50,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:19:50,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:19:50,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:19:50,876 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:19:51,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:19:51,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:19:51,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:19:51,300 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:19:51,301 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:19:51,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2020-12-21 21:19:51,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/862091870/03a8e17cf0ca418a88e046e093838c14/FLAGc98f3638e [2020-12-21 21:19:51,914 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:19:51,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2020-12-21 21:19:51,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/862091870/03a8e17cf0ca418a88e046e093838c14/FLAGc98f3638e [2020-12-21 21:19:52,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/862091870/03a8e17cf0ca418a88e046e093838c14 [2020-12-21 21:19:52,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:19:52,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:19:52,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:19:52,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:19:52,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69bc6f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52, skipping insertion in model container [2020-12-21 21:19:52,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:19:52,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:19:52,499 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i[820,833] [2020-12-21 21:19:52,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,529 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:19:52,544 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i[820,833] [2020-12-21 21:19:52,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,572 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:19:52,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52 WrapperNode [2020-12-21 21:19:52,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:19:52,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:19:52,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,591 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:19:52,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:19:52,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:19:52,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:19:52,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:19:52,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:19:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:19:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:19:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:19:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:19:52,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:19:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:19:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:19:53,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:19:53,240 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-21 21:19:53,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53 BoogieIcfgContainer [2020-12-21 21:19:53,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:19:53,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:19:53,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:19:53,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:19:53,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:19:52" (1/3) ... [2020-12-21 21:19:53,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3f454e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (2/3) ... [2020-12-21 21:19:53,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3f454e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53" (3/3) ... [2020-12-21 21:19:53,254 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2020-12-21 21:19:53,262 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:19:53,268 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:19:53,307 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:19:53,347 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:19:53,347 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:19:53,347 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:19:53,347 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:19:53,347 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:19:53,348 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:19:53,348 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:19:53,348 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:19:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-21 21:19:53,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:19:53,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,371 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2020-12-21 21:19:53,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75027500] [2020-12-21 21:19:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:53,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75027500] [2020-12-21 21:19:53,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:53,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:19:53,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731575158] [2020-12-21 21:19:53,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:53,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:53,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:53,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:53,653 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-12-21 21:19:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:53,689 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2020-12-21 21:19:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:53,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 21:19:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:53,701 INFO L225 Difference]: With dead ends: 42 [2020-12-21 21:19:53,702 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 21:19:53,705 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 [2020-12-21 21:19:53,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 21:19:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-21 21:19:53,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 21:19:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-21 21:19:53,751 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-12-21 21:19:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:53,752 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-21 21:19:53,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-21 21:19:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 21:19:53,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:19:53,756 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2020-12-21 21:19:53,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806006954] [2020-12-21 21:19:53,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:53,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806006954] [2020-12-21 21:19:53,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270708148] [2020-12-21 21:19:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:19:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:53,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:54,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:19:54,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:19:54,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425100654] [2020-12-21 21:19:54,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:54,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:54,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,059 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2020-12-21 21:19:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,077 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2020-12-21 21:19:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:54,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-21 21:19:54,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,078 INFO L225 Difference]: With dead ends: 32 [2020-12-21 21:19:54,078 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 21:19:54,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 21:19:54,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-21 21:19:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:19:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2020-12-21 21:19:54,085 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2020-12-21 21:19:54,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,085 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2020-12-21 21:19:54,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2020-12-21 21:19:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:19:54,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:19:54,302 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2020-12-21 21:19:54,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176100532] [2020-12-21 21:19:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:54,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176100532] [2020-12-21 21:19:54,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511874503] [2020-12-21 21:19:54,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:19:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:54,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:19:54,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:19:54,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525508427] [2020-12-21 21:19:54,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:54,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:54,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,418 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 3 states. [2020-12-21 21:19:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,436 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2020-12-21 21:19:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:54,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-21 21:19:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,444 INFO L225 Difference]: With dead ends: 44 [2020-12-21 21:19:54,445 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:19:54,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:19:54,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-21 21:19:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:19:54,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-12-21 21:19:54,451 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2020-12-21 21:19:54,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,452 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-12-21 21:19:54,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-12-21 21:19:54,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:19:54,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:54,674 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2020-12-21 21:19:54,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18288979] [2020-12-21 21:19:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:19:54,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18288979] [2020-12-21 21:19:54,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348879897] [2020-12-21 21:19:54,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:19:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:19:54,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:54,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:19:54,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109017104] [2020-12-21 21:19:54,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:19:54,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:19:54,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,838 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2020-12-21 21:19:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,862 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-12-21 21:19:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:54,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-21 21:19:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,863 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:19:54,864 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:19:54,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:19:54,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-21 21:19:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:19:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-12-21 21:19:54,870 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2020-12-21 21:19:54,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,870 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-12-21 21:19:54,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:19:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-12-21 21:19:54,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:19:54,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,872 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,087 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,088 INFO L82 PathProgramCache]: Analyzing trace with hash 784472297, now seen corresponding path program 2 times [2020-12-21 21:19:55,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320793442] [2020-12-21 21:19:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:19:55,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320793442] [2020-12-21 21:19:55,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88704337] [2020-12-21 21:19:55,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:19:55,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:55,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:55,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:19:55,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:19:55,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404216271] [2020-12-21 21:19:55,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:19:55,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:19:55,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:55,247 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2020-12-21 21:19:55,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,297 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2020-12-21 21:19:55,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:19:55,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-21 21:19:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,298 INFO L225 Difference]: With dead ends: 57 [2020-12-21 21:19:55,298 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:19:55,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:55,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:19:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-12-21 21:19:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 21:19:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-12-21 21:19:55,306 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 19 [2020-12-21 21:19:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,306 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-12-21 21:19:55,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:19:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-12-21 21:19:55,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 21:19:55,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,523 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,524 INFO L82 PathProgramCache]: Analyzing trace with hash -201702437, now seen corresponding path program 3 times [2020-12-21 21:19:55,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451622635] [2020-12-21 21:19:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:19:55,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451622635] [2020-12-21 21:19:55,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566271594] [2020-12-21 21:19:55,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:19:55,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:19:55,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:55,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:19:55,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2020-12-21 21:19:55,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056465152] [2020-12-21 21:19:55,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:19:55,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:19:55,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:19:55,860 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 9 states. [2020-12-21 21:19:55,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,913 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2020-12-21 21:19:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:19:55,913 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-12-21 21:19:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,914 INFO L225 Difference]: With dead ends: 70 [2020-12-21 21:19:55,915 INFO L226 Difference]: Without dead ends: 46 [2020-12-21 21:19:55,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:19:55,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-21 21:19:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-12-21 21:19:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 21:19:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-12-21 21:19:55,922 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 24 [2020-12-21 21:19:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,922 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-12-21 21:19:55,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:19:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-12-21 21:19:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:19:55,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,924 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:19:56,140 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1255714277, now seen corresponding path program 4 times [2020-12-21 21:19:56,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578634923] [2020-12-21 21:19:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:19:56,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578634923] [2020-12-21 21:19:56,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632872735] [2020-12-21 21:19:56,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:19:56,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:19:56,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:56,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:19:56,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:56,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:19:56,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337688461] [2020-12-21 21:19:56,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:19:56,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:19:56,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:56,364 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 8 states. [2020-12-21 21:19:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,398 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-12-21 21:19:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:19:56,399 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-12-21 21:19:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,399 INFO L225 Difference]: With dead ends: 74 [2020-12-21 21:19:56,400 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:19:56,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:19:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-21 21:19:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-21 21:19:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-12-21 21:19:56,411 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 29 [2020-12-21 21:19:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,411 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-12-21 21:19:56,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:19:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-12-21 21:19:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:19:56,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,413 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,627 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,629 INFO L82 PathProgramCache]: Analyzing trace with hash -654389213, now seen corresponding path program 5 times [2020-12-21 21:19:56,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686698159] [2020-12-21 21:19:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:19:56,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686698159] [2020-12-21 21:19:56,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564722477] [2020-12-21 21:19:56,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:19:56,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-21 21:19:56,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:56,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 21:19:56,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:56,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-21 21:19:56,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99254994] [2020-12-21 21:19:56,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:19:56,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:19:56,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:56,873 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 12 states. [2020-12-21 21:19:56,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,935 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-12-21 21:19:56,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:19:56,935 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-12-21 21:19:56,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,936 INFO L225 Difference]: With dead ends: 86 [2020-12-21 21:19:56,936 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:19:56,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:56,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:19:56,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-12-21 21:19:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 21:19:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-12-21 21:19:56,944 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 31 [2020-12-21 21:19:56,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,944 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-12-21 21:19:56,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:19:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-12-21 21:19:56,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 21:19:56,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,946 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:57,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,159 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:57,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:57,161 INFO L82 PathProgramCache]: Analyzing trace with hash -568371359, now seen corresponding path program 6 times [2020-12-21 21:19:57,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:57,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214241012] [2020-12-21 21:19:57,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-21 21:19:57,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214241012] [2020-12-21 21:19:57,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624275130] [2020-12-21 21:19:57,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:19:57,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:19:57,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:57,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:57,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:57,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-21 21:19:57,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011150441] [2020-12-21 21:19:57,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:19:57,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:19:57,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:19:57,515 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 14 states. [2020-12-21 21:19:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:57,602 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2020-12-21 21:19:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:19:57,602 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-12-21 21:19:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:57,605 INFO L225 Difference]: With dead ends: 100 [2020-12-21 21:19:57,605 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:19:57,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:19:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:19:57,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-12-21 21:19:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:19:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-12-21 21:19:57,620 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 36 [2020-12-21 21:19:57,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:57,622 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-12-21 21:19:57,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:19:57,622 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-12-21 21:19:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:19:57,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:57,626 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:57,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:19:57,841 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:57,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:57,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1072367713, now seen corresponding path program 7 times [2020-12-21 21:19:57,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:57,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640168418] [2020-12-21 21:19:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:57,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640168418] [2020-12-21 21:19:57,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715818676] [2020-12-21 21:19:57,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:19:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:19:58,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:58,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:58,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:19:58,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568660435] [2020-12-21 21:19:58,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:19:58,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:58,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:19:58,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:58,101 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 11 states. [2020-12-21 21:19:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,134 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2020-12-21 21:19:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:19:58,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-12-21 21:19:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,135 INFO L225 Difference]: With dead ends: 104 [2020-12-21 21:19:58,135 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:19:58,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:19:58,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-21 21:19:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-21 21:19:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-12-21 21:19:58,142 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 41 [2020-12-21 21:19:58,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,142 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-12-21 21:19:58,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:19:58,143 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-12-21 21:19:58,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 21:19:58,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,144 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:58,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,359 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:58,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:58,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1876143325, now seen corresponding path program 8 times [2020-12-21 21:19:58,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:58,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189901263] [2020-12-21 21:19:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:58,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189901263] [2020-12-21 21:19:58,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481529260] [2020-12-21 21:19:58,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:19:58,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:58,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:58,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:19:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:58,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:58,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:19:58,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446965750] [2020-12-21 21:19:58,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:19:58,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:19:58,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:58,667 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 12 states. [2020-12-21 21:19:58,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,723 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2020-12-21 21:19:58,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:19:58,724 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-12-21 21:19:58,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,725 INFO L225 Difference]: With dead ends: 106 [2020-12-21 21:19:58,725 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:19:58,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:58,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:19:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-21 21:19:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 21:19:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2020-12-21 21:19:58,732 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 43 [2020-12-21 21:19:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,732 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2020-12-21 21:19:58,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:19:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2020-12-21 21:19:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:19:58,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,733 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:58,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,948 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:58,949 INFO L82 PathProgramCache]: Analyzing trace with hash 716835483, now seen corresponding path program 9 times [2020-12-21 21:19:58,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:58,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062138741] [2020-12-21 21:19:58,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:59,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062138741] [2020-12-21 21:19:59,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837328932] [2020-12-21 21:19:59,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:19:59,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-21 21:19:59,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:59,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:19:59,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 21:19:59,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:59,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-21 21:19:59,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721521902] [2020-12-21 21:19:59,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:19:59,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:19:59,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:19:59,306 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 18 states. [2020-12-21 21:19:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:59,405 INFO L93 Difference]: Finished difference Result 118 states and 152 transitions. [2020-12-21 21:19:59,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:19:59,406 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-12-21 21:19:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:59,407 INFO L225 Difference]: With dead ends: 118 [2020-12-21 21:19:59,407 INFO L226 Difference]: Without dead ends: 76 [2020-12-21 21:19:59,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:19:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-21 21:19:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-12-21 21:19:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-21 21:19:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-12-21 21:19:59,414 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 45 [2020-12-21 21:19:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:59,414 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-12-21 21:19:59,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:19:59,414 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-12-21 21:19:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 21:19:59,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,415 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:19:59,630 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1555127913, now seen corresponding path program 10 times [2020-12-21 21:19:59,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020432011] [2020-12-21 21:19:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-21 21:19:59,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020432011] [2020-12-21 21:19:59,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963896441] [2020-12-21 21:19:59,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:19:59,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:19:59,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:59,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:19:59,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-21 21:19:59,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:59,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:19:59,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480340241] [2020-12-21 21:19:59,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:19:59,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:19:59,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:19:59,980 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 14 states. [2020-12-21 21:20:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:00,039 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2020-12-21 21:20:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:20:00,039 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-12-21 21:20:00,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:00,040 INFO L225 Difference]: With dead ends: 122 [2020-12-21 21:20:00,040 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 21:20:00,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 21:20:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-21 21:20:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 21:20:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-12-21 21:20:00,046 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 50 [2020-12-21 21:20:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:00,047 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-12-21 21:20:00,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:20:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-12-21 21:20:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-21 21:20:00,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:00,048 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:00,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:20:00,262 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:00,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:00,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1720209685, now seen corresponding path program 11 times [2020-12-21 21:20:00,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:00,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500434377] [2020-12-21 21:20:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-21 21:20:00,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500434377] [2020-12-21 21:20:00,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413283099] [2020-12-21 21:20:00,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:00,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 21:20:00,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:00,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-21 21:20:00,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:00,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2020-12-21 21:20:00,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38971641] [2020-12-21 21:20:00,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:20:00,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:00,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:20:00,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:00,735 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 21 states. [2020-12-21 21:20:00,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:00,856 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2020-12-21 21:20:00,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:20:00,857 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-12-21 21:20:00,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:00,858 INFO L225 Difference]: With dead ends: 134 [2020-12-21 21:20:00,858 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:20:00,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:20:00,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2020-12-21 21:20:00,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-21 21:20:00,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2020-12-21 21:20:00,864 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 52 [2020-12-21 21:20:00,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:00,864 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2020-12-21 21:20:00,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:20:00,865 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2020-12-21 21:20:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 21:20:00,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:00,865 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:01,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:20:01,072 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:01,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:01,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2017640405, now seen corresponding path program 12 times [2020-12-21 21:20:01,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:01,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034946582] [2020-12-21 21:20:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:01,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034946582] [2020-12-21 21:20:01,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316916918] [2020-12-21 21:20:01,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:01,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:20:01,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:01,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:20:01,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:01,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:01,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:20:01,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586503556] [2020-12-21 21:20:01,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:20:01,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:20:01,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:20:01,595 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand 16 states. [2020-12-21 21:20:01,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:01,650 INFO L93 Difference]: Finished difference Result 138 states and 174 transitions. [2020-12-21 21:20:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:20:01,651 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-12-21 21:20:01,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:01,652 INFO L225 Difference]: With dead ends: 138 [2020-12-21 21:20:01,652 INFO L226 Difference]: Without dead ends: 84 [2020-12-21 21:20:01,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:20:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-21 21:20:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-21 21:20:01,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:20:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-12-21 21:20:01,661 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 57 [2020-12-21 21:20:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:01,662 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-12-21 21:20:01,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:20:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-12-21 21:20:01,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:20:01,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:01,664 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:01,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:01,878 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:01,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1894041325, now seen corresponding path program 13 times [2020-12-21 21:20:01,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:01,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690639334] [2020-12-21 21:20:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:02,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690639334] [2020-12-21 21:20:02,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718606483] [2020-12-21 21:20:02,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:20:02,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:02,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:02,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:20:02,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997710810] [2020-12-21 21:20:02,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:20:02,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:02,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:20:02,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:02,191 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 17 states. [2020-12-21 21:20:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,255 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2020-12-21 21:20:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:20:02,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-12-21 21:20:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,257 INFO L225 Difference]: With dead ends: 140 [2020-12-21 21:20:02,257 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:20:02,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:20:02,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-21 21:20:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:20:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2020-12-21 21:20:02,273 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 59 [2020-12-21 21:20:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,273 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2020-12-21 21:20:02,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:20:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2020-12-21 21:20:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:20:02,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,274 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:02,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:20:02,488 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:02,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:02,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1371167441, now seen corresponding path program 14 times [2020-12-21 21:20:02,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:02,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789212447] [2020-12-21 21:20:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:02,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789212447] [2020-12-21 21:20:02,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641650579] [2020-12-21 21:20:02,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:02,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:02,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:02,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:20:02,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:02,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:02,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:20:02,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390313300] [2020-12-21 21:20:02,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:20:02,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:02,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:20:02,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:02,861 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 18 states. [2020-12-21 21:20:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,925 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2020-12-21 21:20:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:20:02,925 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-12-21 21:20:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,927 INFO L225 Difference]: With dead ends: 142 [2020-12-21 21:20:02,927 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 21:20:02,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 21:20:02,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-21 21:20:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:20:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2020-12-21 21:20:02,936 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 61 [2020-12-21 21:20:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,937 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2020-12-21 21:20:02,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:20:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2020-12-21 21:20:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 21:20:02,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,939 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:20:03,153 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,154 INFO L82 PathProgramCache]: Analyzing trace with hash -384301809, now seen corresponding path program 15 times [2020-12-21 21:20:03,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978396331] [2020-12-21 21:20:03,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-21 21:20:03,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978396331] [2020-12-21 21:20:03,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800078760] [2020-12-21 21:20:03,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:03,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 21:20:03,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:03,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:20:03,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-21 21:20:03,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:03,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2020-12-21 21:20:03,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204715873] [2020-12-21 21:20:03,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:20:03,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:03,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:20:03,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:03,696 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand 26 states. [2020-12-21 21:20:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:03,834 INFO L93 Difference]: Finished difference Result 154 states and 196 transitions. [2020-12-21 21:20:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:20:03,835 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-12-21 21:20:03,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:03,836 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:20:03,836 INFO L226 Difference]: Without dead ends: 100 [2020-12-21 21:20:03,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-21 21:20:03,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2020-12-21 21:20:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-21 21:20:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2020-12-21 21:20:03,842 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 63 [2020-12-21 21:20:03,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:03,842 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2020-12-21 21:20:03,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:20:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2020-12-21 21:20:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-21 21:20:03,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:03,843 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:04,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:20:04,057 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:04,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2008179445, now seen corresponding path program 16 times [2020-12-21 21:20:04,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:04,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183631819] [2020-12-21 21:20:04,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-21 21:20:04,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183631819] [2020-12-21 21:20:04,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361814547] [2020-12-21 21:20:04,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:04,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:04,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:04,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:20:04,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-21 21:20:04,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:04,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:20:04,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225858579] [2020-12-21 21:20:04,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:20:04,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:04,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:20:04,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:04,462 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 20 states. [2020-12-21 21:20:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:04,552 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2020-12-21 21:20:04,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:20:04,554 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2020-12-21 21:20:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:04,555 INFO L225 Difference]: With dead ends: 158 [2020-12-21 21:20:04,555 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 21:20:04,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 21:20:04,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-21 21:20:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-21 21:20:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2020-12-21 21:20:04,560 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 68 [2020-12-21 21:20:04,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:04,560 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-12-21 21:20:04,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:20:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2020-12-21 21:20:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-21 21:20:04,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:04,561 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:04,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:04,776 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:04,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:04,777 INFO L82 PathProgramCache]: Analyzing trace with hash -32876809, now seen corresponding path program 17 times [2020-12-21 21:20:04,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:04,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271878235] [2020-12-21 21:20:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-21 21:20:05,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271878235] [2020-12-21 21:20:05,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116430107] [2020-12-21 21:20:05,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:05,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-21 21:20:05,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:05,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:20:05,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-21 21:20:05,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:05,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2020-12-21 21:20:05,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417518098] [2020-12-21 21:20:05,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:20:05,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:05,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:20:05,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:05,544 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 29 states. [2020-12-21 21:20:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:05,704 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2020-12-21 21:20:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:20:05,705 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2020-12-21 21:20:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:05,706 INFO L225 Difference]: With dead ends: 170 [2020-12-21 21:20:05,706 INFO L226 Difference]: Without dead ends: 110 [2020-12-21 21:20:05,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-21 21:20:05,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2020-12-21 21:20:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-21 21:20:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2020-12-21 21:20:05,711 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 70 [2020-12-21 21:20:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:05,711 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2020-12-21 21:20:05,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:20:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2020-12-21 21:20:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 21:20:05,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:05,712 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:05,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:05,925 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:05,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1211963593, now seen corresponding path program 18 times [2020-12-21 21:20:05,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:05,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009069470] [2020-12-21 21:20:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-12-21 21:20:06,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009069470] [2020-12-21 21:20:06,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308384148] [2020-12-21 21:20:06,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:06,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-21 21:20:06,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:06,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:20:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-21 21:20:07,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:07,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2020-12-21 21:20:07,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227174943] [2020-12-21 21:20:07,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 21:20:07,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:07,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 21:20:07,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:20:07,041 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 31 states. [2020-12-21 21:20:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:07,191 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2020-12-21 21:20:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:20:07,191 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2020-12-21 21:20:07,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:07,192 INFO L225 Difference]: With dead ends: 184 [2020-12-21 21:20:07,192 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 21:20:07,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:20:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 21:20:07,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-12-21 21:20:07,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 21:20:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2020-12-21 21:20:07,198 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 75 [2020-12-21 21:20:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:07,198 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2020-12-21 21:20:07,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-21 21:20:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2020-12-21 21:20:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-21 21:20:07,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:07,199 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:07,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:20:07,404 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:07,406 INFO L82 PathProgramCache]: Analyzing trace with hash -2135143941, now seen corresponding path program 19 times [2020-12-21 21:20:07,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:07,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434068742] [2020-12-21 21:20:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-21 21:20:07,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434068742] [2020-12-21 21:20:07,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629446701] [2020-12-21 21:20:07,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:07,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:20:07,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-21 21:20:07,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:07,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:20:07,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518142159] [2020-12-21 21:20:07,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:20:07,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:07,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:20:07,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:20:07,893 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand 23 states. [2020-12-21 21:20:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:07,962 INFO L93 Difference]: Finished difference Result 188 states and 236 transitions. [2020-12-21 21:20:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:20:07,964 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 80 [2020-12-21 21:20:07,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:07,965 INFO L225 Difference]: With dead ends: 188 [2020-12-21 21:20:07,965 INFO L226 Difference]: Without dead ends: 116 [2020-12-21 21:20:07,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:20:07,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-21 21:20:07,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-21 21:20:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 21:20:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2020-12-21 21:20:07,969 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 80 [2020-12-21 21:20:07,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:07,970 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2020-12-21 21:20:07,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:20:07,970 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2020-12-21 21:20:07,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 21:20:07,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:07,971 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:08,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:20:08,187 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:08,188 INFO L82 PathProgramCache]: Analyzing trace with hash -70497539, now seen corresponding path program 20 times [2020-12-21 21:20:08,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:08,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377654736] [2020-12-21 21:20:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-21 21:20:08,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377654736] [2020-12-21 21:20:08,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948950193] [2020-12-21 21:20:08,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:08,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:08,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:08,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:20:08,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-21 21:20:08,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:08,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:20:08,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95067382] [2020-12-21 21:20:08,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:20:08,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:20:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:20:08,745 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand 24 states. [2020-12-21 21:20:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:08,817 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2020-12-21 21:20:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:20:08,818 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-12-21 21:20:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:08,819 INFO L225 Difference]: With dead ends: 190 [2020-12-21 21:20:08,819 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 21:20:08,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:20:08,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 21:20:08,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-12-21 21:20:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-21 21:20:08,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2020-12-21 21:20:08,824 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 82 [2020-12-21 21:20:08,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:08,824 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2020-12-21 21:20:08,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:20:08,824 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2020-12-21 21:20:08,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 21:20:08,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:08,825 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:09,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:09,032 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:09,033 INFO L82 PathProgramCache]: Analyzing trace with hash -220195969, now seen corresponding path program 21 times [2020-12-21 21:20:09,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:09,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002932374] [2020-12-21 21:20:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-21 21:20:09,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002932374] [2020-12-21 21:20:09,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988779522] [2020-12-21 21:20:09,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:09,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-21 21:20:09,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:09,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:20:09,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-21 21:20:10,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:10,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2020-12-21 21:20:10,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984947483] [2020-12-21 21:20:10,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:20:10,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:10,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:20:10,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:10,026 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 35 states. [2020-12-21 21:20:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:10,181 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2020-12-21 21:20:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:20:10,182 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-12-21 21:20:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:10,183 INFO L225 Difference]: With dead ends: 202 [2020-12-21 21:20:10,183 INFO L226 Difference]: Without dead ends: 130 [2020-12-21 21:20:10,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-21 21:20:10,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2020-12-21 21:20:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 21:20:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2020-12-21 21:20:10,188 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 84 [2020-12-21 21:20:10,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:10,189 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2020-12-21 21:20:10,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:20:10,189 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2020-12-21 21:20:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 21:20:10,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:10,190 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:10,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:20:10,404 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:10,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:10,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1727048385, now seen corresponding path program 22 times [2020-12-21 21:20:10,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:10,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308495506] [2020-12-21 21:20:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-21 21:20:10,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308495506] [2020-12-21 21:20:10,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863544848] [2020-12-21 21:20:10,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:10,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:10,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:10,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:20:10,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-21 21:20:11,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:11,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:20:11,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15796085] [2020-12-21 21:20:11,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:20:11,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:20:11,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:11,002 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand 26 states. [2020-12-21 21:20:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:11,088 INFO L93 Difference]: Finished difference Result 206 states and 258 transitions. [2020-12-21 21:20:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:20:11,088 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 89 [2020-12-21 21:20:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:11,090 INFO L225 Difference]: With dead ends: 206 [2020-12-21 21:20:11,090 INFO L226 Difference]: Without dead ends: 128 [2020-12-21 21:20:11,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-21 21:20:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-21 21:20:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-21 21:20:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2020-12-21 21:20:11,096 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 89 [2020-12-21 21:20:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:11,096 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2020-12-21 21:20:11,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:20:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2020-12-21 21:20:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 21:20:11,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:11,097 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:11,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:11,313 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:11,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1880839169, now seen corresponding path program 23 times [2020-12-21 21:20:11,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:11,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239845821] [2020-12-21 21:20:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-21 21:20:11,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239845821] [2020-12-21 21:20:11,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139778111] [2020-12-21 21:20:11,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:12,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-21 21:20:12,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:12,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:20:12,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-21 21:20:12,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:12,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2020-12-21 21:20:12,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159910375] [2020-12-21 21:20:12,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:20:12,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:12,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:20:12,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:12,651 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand 38 states. [2020-12-21 21:20:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:12,873 INFO L93 Difference]: Finished difference Result 218 states and 276 transitions. [2020-12-21 21:20:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:20:12,874 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 91 [2020-12-21 21:20:12,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:12,875 INFO L225 Difference]: With dead ends: 218 [2020-12-21 21:20:12,875 INFO L226 Difference]: Without dead ends: 140 [2020-12-21 21:20:12,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-21 21:20:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2020-12-21 21:20:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-21 21:20:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2020-12-21 21:20:12,880 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 91 [2020-12-21 21:20:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:12,881 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2020-12-21 21:20:12,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:20:12,881 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2020-12-21 21:20:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-21 21:20:12,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:12,882 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:13,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 21:20:13,092 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:13,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:13,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1961812219, now seen corresponding path program 24 times [2020-12-21 21:20:13,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:13,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47000686] [2020-12-21 21:20:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-12-21 21:20:13,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47000686] [2020-12-21 21:20:13,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318806183] [2020-12-21 21:20:13,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:14,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-21 21:20:14,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:14,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:20:14,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-21 21:20:15,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:15,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 40 [2020-12-21 21:20:15,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076162035] [2020-12-21 21:20:15,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 21:20:15,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:15,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 21:20:15,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:20:15,217 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand 40 states. [2020-12-21 21:20:15,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:15,411 INFO L93 Difference]: Finished difference Result 232 states and 294 transitions. [2020-12-21 21:20:15,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 21:20:15,411 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 96 [2020-12-21 21:20:15,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:15,412 INFO L225 Difference]: With dead ends: 232 [2020-12-21 21:20:15,413 INFO L226 Difference]: Without dead ends: 148 [2020-12-21 21:20:15,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:20:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-21 21:20:15,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2020-12-21 21:20:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-21 21:20:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2020-12-21 21:20:15,419 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 96 [2020-12-21 21:20:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:15,419 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2020-12-21 21:20:15,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 21:20:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2020-12-21 21:20:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 21:20:15,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:15,421 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:15,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:20:15,632 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:15,633 INFO L82 PathProgramCache]: Analyzing trace with hash -226001797, now seen corresponding path program 25 times [2020-12-21 21:20:15,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:15,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876718051] [2020-12-21 21:20:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-21 21:20:16,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876718051] [2020-12-21 21:20:16,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206442406] [2020-12-21 21:20:16,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:16,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:20:16,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-21 21:20:16,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:16,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:20:16,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057873866] [2020-12-21 21:20:16,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:20:16,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:16,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:20:16,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:16,273 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand 29 states. [2020-12-21 21:20:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:16,357 INFO L93 Difference]: Finished difference Result 236 states and 296 transitions. [2020-12-21 21:20:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:20:16,372 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 101 [2020-12-21 21:20:16,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:16,374 INFO L225 Difference]: With dead ends: 236 [2020-12-21 21:20:16,374 INFO L226 Difference]: Without dead ends: 146 [2020-12-21 21:20:16,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-21 21:20:16,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-12-21 21:20:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-21 21:20:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2020-12-21 21:20:16,380 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 101 [2020-12-21 21:20:16,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:16,380 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2020-12-21 21:20:16,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:20:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2020-12-21 21:20:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-21 21:20:16,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:16,382 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:16,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:20:16,595 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:16,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1807904583, now seen corresponding path program 26 times [2020-12-21 21:20:16,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:16,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433342415] [2020-12-21 21:20:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-21 21:20:17,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433342415] [2020-12-21 21:20:17,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891522108] [2020-12-21 21:20:17,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:17,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:17,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:17,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:20:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-21 21:20:17,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:17,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-21 21:20:17,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101594325] [2020-12-21 21:20:17,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:20:17,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:17,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:20:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:20:17,331 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand 30 states. [2020-12-21 21:20:17,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:17,436 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2020-12-21 21:20:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:20:17,437 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 103 [2020-12-21 21:20:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:17,438 INFO L225 Difference]: With dead ends: 238 [2020-12-21 21:20:17,438 INFO L226 Difference]: Without dead ends: 148 [2020-12-21 21:20:17,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:20:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-21 21:20:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-12-21 21:20:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-21 21:20:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2020-12-21 21:20:17,444 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 103 [2020-12-21 21:20:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:17,444 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2020-12-21 21:20:17,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:20:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2020-12-21 21:20:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-21 21:20:17,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:17,446 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:17,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:20:17,658 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:17,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:17,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1598059145, now seen corresponding path program 27 times [2020-12-21 21:20:17,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:17,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813646236] [2020-12-21 21:20:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-21 21:20:18,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813646236] [2020-12-21 21:20:18,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534264163] [2020-12-21 21:20:18,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:18,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-21 21:20:18,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:18,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:20:18,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-12-21 21:20:18,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:18,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16] total 44 [2020-12-21 21:20:18,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653791967] [2020-12-21 21:20:18,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 21:20:18,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:18,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 21:20:18,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:20:18,931 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand 44 states. [2020-12-21 21:20:19,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:19,136 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2020-12-21 21:20:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-21 21:20:19,136 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 105 [2020-12-21 21:20:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:19,137 INFO L225 Difference]: With dead ends: 250 [2020-12-21 21:20:19,138 INFO L226 Difference]: Without dead ends: 160 [2020-12-21 21:20:19,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:20:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-21 21:20:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2020-12-21 21:20:19,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-21 21:20:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2020-12-21 21:20:19,144 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 105 [2020-12-21 21:20:19,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:19,144 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2020-12-21 21:20:19,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 21:20:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2020-12-21 21:20:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-21 21:20:19,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:19,145 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:19,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:19,360 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:19,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:19,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1910005517, now seen corresponding path program 28 times [2020-12-21 21:20:19,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:19,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4755406] [2020-12-21 21:20:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-21 21:20:19,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4755406] [2020-12-21 21:20:19,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842632175] [2020-12-21 21:20:19,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:20,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:20,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:20,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 21:20:20,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-21 21:20:20,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:20,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-21 21:20:20,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403667172] [2020-12-21 21:20:20,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:20:20,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:20,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:20:20,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:20,172 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand 32 states. [2020-12-21 21:20:20,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:20,275 INFO L93 Difference]: Finished difference Result 254 states and 318 transitions. [2020-12-21 21:20:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:20:20,275 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 110 [2020-12-21 21:20:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:20,276 INFO L225 Difference]: With dead ends: 254 [2020-12-21 21:20:20,276 INFO L226 Difference]: Without dead ends: 158 [2020-12-21 21:20:20,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:20,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-21 21:20:20,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-12-21 21:20:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-21 21:20:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 189 transitions. [2020-12-21 21:20:20,282 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 189 transitions. Word has length 110 [2020-12-21 21:20:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:20,282 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 189 transitions. [2020-12-21 21:20:20,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:20:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 189 transitions. [2020-12-21 21:20:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-21 21:20:20,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:20,284 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:20,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:20,499 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:20,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:20,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1132605583, now seen corresponding path program 29 times [2020-12-21 21:20:20,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:20,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145450890] [2020-12-21 21:20:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-21 21:20:21,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145450890] [2020-12-21 21:20:21,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649881901] [2020-12-21 21:20:21,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:24,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-21 21:20:24,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:24,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:20:24,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-12-21 21:20:25,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:25,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 17] total 47 [2020-12-21 21:20:25,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971937552] [2020-12-21 21:20:25,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 21:20:25,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:25,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 21:20:25,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:20:25,456 INFO L87 Difference]: Start difference. First operand 157 states and 189 transitions. Second operand 47 states. [2020-12-21 21:20:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:25,721 INFO L93 Difference]: Finished difference Result 266 states and 336 transitions. [2020-12-21 21:20:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 21:20:25,722 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 112 [2020-12-21 21:20:25,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:25,723 INFO L225 Difference]: With dead ends: 266 [2020-12-21 21:20:25,723 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 21:20:25,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:20:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 21:20:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2020-12-21 21:20:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-21 21:20:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2020-12-21 21:20:25,730 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 112 [2020-12-21 21:20:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:25,730 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2020-12-21 21:20:25,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 21:20:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2020-12-21 21:20:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-21 21:20:25,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:25,732 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:25,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:25,947 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:25,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1997294257, now seen corresponding path program 30 times [2020-12-21 21:20:25,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:25,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386857980] [2020-12-21 21:20:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-12-21 21:20:26,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386857980] [2020-12-21 21:20:26,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969083938] [2020-12-21 21:20:26,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:29,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-21 21:20:29,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:29,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:20:29,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-12-21 21:20:30,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:30,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 18] total 49 [2020-12-21 21:20:30,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187399679] [2020-12-21 21:20:30,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-21 21:20:30,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:30,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-21 21:20:30,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:20:30,137 INFO L87 Difference]: Start difference. First operand 165 states and 199 transitions. Second operand 49 states. [2020-12-21 21:20:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:30,377 INFO L93 Difference]: Finished difference Result 280 states and 354 transitions. [2020-12-21 21:20:30,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-21 21:20:30,377 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 117 [2020-12-21 21:20:30,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:30,378 INFO L225 Difference]: With dead ends: 280 [2020-12-21 21:20:30,379 INFO L226 Difference]: Without dead ends: 178 [2020-12-21 21:20:30,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:20:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-21 21:20:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2020-12-21 21:20:30,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-21 21:20:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 209 transitions. [2020-12-21 21:20:30,385 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 209 transitions. Word has length 117 [2020-12-21 21:20:30,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:30,385 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 209 transitions. [2020-12-21 21:20:30,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-21 21:20:30,385 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 209 transitions. [2020-12-21 21:20:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-21 21:20:30,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:30,387 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:30,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:20:30,602 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:30,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:30,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1124602733, now seen corresponding path program 31 times [2020-12-21 21:20:30,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:30,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918221092] [2020-12-21 21:20:30,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-21 21:20:31,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918221092] [2020-12-21 21:20:31,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126986279] [2020-12-21 21:20:31,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:31,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 21:20:31,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-21 21:20:31,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:31,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-21 21:20:31,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174930635] [2020-12-21 21:20:31,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:20:31,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:31,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:20:31,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:31,476 INFO L87 Difference]: Start difference. First operand 173 states and 209 transitions. Second operand 35 states. [2020-12-21 21:20:31,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:31,595 INFO L93 Difference]: Finished difference Result 284 states and 356 transitions. [2020-12-21 21:20:31,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:20:31,596 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 122 [2020-12-21 21:20:31,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:31,597 INFO L225 Difference]: With dead ends: 284 [2020-12-21 21:20:31,598 INFO L226 Difference]: Without dead ends: 176 [2020-12-21 21:20:31,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:31,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-21 21:20:31,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-12-21 21:20:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-21 21:20:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2020-12-21 21:20:31,603 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 122 [2020-12-21 21:20:31,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:31,604 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2020-12-21 21:20:31,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:20:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2020-12-21 21:20:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-21 21:20:31,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:31,605 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:31,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:31,821 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:31,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:31,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1878625045, now seen corresponding path program 32 times [2020-12-21 21:20:31,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:31,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175598499] [2020-12-21 21:20:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-21 21:20:32,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175598499] [2020-12-21 21:20:32,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862527713] [2020-12-21 21:20:32,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:32,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:32,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:32,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-21 21:20:32,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-21 21:20:32,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:32,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-21 21:20:32,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052556322] [2020-12-21 21:20:32,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 21:20:32,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:32,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 21:20:32,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:20:32,822 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand 36 states. [2020-12-21 21:20:32,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:32,945 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2020-12-21 21:20:32,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:20:32,945 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2020-12-21 21:20:32,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:32,946 INFO L225 Difference]: With dead ends: 286 [2020-12-21 21:20:32,946 INFO L226 Difference]: Without dead ends: 178 [2020-12-21 21:20:32,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:20:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-21 21:20:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-12-21 21:20:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-21 21:20:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2020-12-21 21:20:32,952 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 124 [2020-12-21 21:20:32,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:32,953 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2020-12-21 21:20:32,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 21:20:32,953 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2020-12-21 21:20:32,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-21 21:20:32,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:32,954 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:33,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:20:33,168 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:33,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1762496791, now seen corresponding path program 33 times [2020-12-21 21:20:33,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:33,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123281760] [2020-12-21 21:20:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-12-21 21:20:33,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123281760] [2020-12-21 21:20:33,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332106491] [2020-12-21 21:20:33,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:34,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-21 21:20:34,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:34,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:20:34,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-12-21 21:20:34,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:34,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19] total 53 [2020-12-21 21:20:34,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598245104] [2020-12-21 21:20:34,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-21 21:20:34,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:34,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-21 21:20:34,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:20:34,940 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand 53 states. [2020-12-21 21:20:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:35,276 INFO L93 Difference]: Finished difference Result 298 states and 376 transitions. [2020-12-21 21:20:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-21 21:20:35,277 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 126 [2020-12-21 21:20:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:35,278 INFO L225 Difference]: With dead ends: 298 [2020-12-21 21:20:35,278 INFO L226 Difference]: Without dead ends: 190 [2020-12-21 21:20:35,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:20:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-21 21:20:35,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2020-12-21 21:20:35,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-21 21:20:35,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 223 transitions. [2020-12-21 21:20:35,286 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 223 transitions. Word has length 126 [2020-12-21 21:20:35,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:35,286 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 223 transitions. [2020-12-21 21:20:35,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-21 21:20:35,286 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 223 transitions. [2020-12-21 21:20:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-21 21:20:35,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:35,287 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:35,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:35,502 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:35,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:35,503 INFO L82 PathProgramCache]: Analyzing trace with hash 247814313, now seen corresponding path program 34 times [2020-12-21 21:20:35,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:35,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822237889] [2020-12-21 21:20:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-12-21 21:20:36,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822237889] [2020-12-21 21:20:36,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740344986] [2020-12-21 21:20:36,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:36,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:36,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:36,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:20:36,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-12-21 21:20:36,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:36,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-21 21:20:36,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535521150] [2020-12-21 21:20:36,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:20:36,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:36,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:20:36,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:36,620 INFO L87 Difference]: Start difference. First operand 185 states and 223 transitions. Second operand 38 states. [2020-12-21 21:20:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:36,778 INFO L93 Difference]: Finished difference Result 302 states and 378 transitions. [2020-12-21 21:20:36,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:20:36,778 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 131 [2020-12-21 21:20:36,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:36,780 INFO L225 Difference]: With dead ends: 302 [2020-12-21 21:20:36,780 INFO L226 Difference]: Without dead ends: 188 [2020-12-21 21:20:36,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:36,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-21 21:20:36,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-12-21 21:20:36,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-21 21:20:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 225 transitions. [2020-12-21 21:20:36,787 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 225 transitions. Word has length 131 [2020-12-21 21:20:36,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:36,787 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 225 transitions. [2020-12-21 21:20:36,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:20:36,787 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 225 transitions. [2020-12-21 21:20:36,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-21 21:20:36,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:36,788 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:37,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:20:37,003 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:37,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1912542105, now seen corresponding path program 35 times [2020-12-21 21:20:37,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:37,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649759666] [2020-12-21 21:20:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-12-21 21:20:37,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649759666] [2020-12-21 21:20:37,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784917313] [2020-12-21 21:20:37,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:20:43,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-21 21:20:43,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:43,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:20:43,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-12-21 21:20:44,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:44,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 20] total 56 [2020-12-21 21:20:44,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422272250] [2020-12-21 21:20:44,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-21 21:20:44,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:44,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-21 21:20:44,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 21:20:44,335 INFO L87 Difference]: Start difference. First operand 187 states and 225 transitions. Second operand 56 states. [2020-12-21 21:20:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:44,609 INFO L93 Difference]: Finished difference Result 314 states and 396 transitions. [2020-12-21 21:20:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-21 21:20:44,609 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 133 [2020-12-21 21:20:44,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:44,611 INFO L225 Difference]: With dead ends: 314 [2020-12-21 21:20:44,611 INFO L226 Difference]: Without dead ends: 200 [2020-12-21 21:20:44,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 21:20:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-21 21:20:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2020-12-21 21:20:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-21 21:20:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 235 transitions. [2020-12-21 21:20:44,618 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 235 transitions. Word has length 133 [2020-12-21 21:20:44,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:44,618 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 235 transitions. [2020-12-21 21:20:44,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-21 21:20:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 235 transitions. [2020-12-21 21:20:44,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-21 21:20:44,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:44,620 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:44,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:20:44,835 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:44,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:44,836 INFO L82 PathProgramCache]: Analyzing trace with hash 550249245, now seen corresponding path program 36 times [2020-12-21 21:20:44,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:44,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725033753] [2020-12-21 21:20:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2020-12-21 21:20:45,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725033753] [2020-12-21 21:20:45,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349320384] [2020-12-21 21:20:45,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:21:00,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-21 21:21:00,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:00,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 21:21:00,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 72 proven. 477 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-12-21 21:21:01,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:01,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 23] total 60 [2020-12-21 21:21:01,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093009139] [2020-12-21 21:21:01,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-21 21:21:01,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:01,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-21 21:21:01,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1029, Invalid=2511, Unknown=0, NotChecked=0, Total=3540 [2020-12-21 21:21:01,362 INFO L87 Difference]: Start difference. First operand 195 states and 235 transitions. Second operand 60 states. [2020-12-21 21:21:02,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:02,499 INFO L93 Difference]: Finished difference Result 329 states and 416 transitions. [2020-12-21 21:21:02,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-21 21:21:02,499 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 138 [2020-12-21 21:21:02,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:02,500 INFO L225 Difference]: With dead ends: 329 [2020-12-21 21:21:02,500 INFO L226 Difference]: Without dead ends: 209 [2020-12-21 21:21:02,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1447, Invalid=4715, Unknown=0, NotChecked=0, Total=6162 [2020-12-21 21:21:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-21 21:21:02,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2020-12-21 21:21:02,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-21 21:21:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2020-12-21 21:21:02,508 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 138 [2020-12-21 21:21:02,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:02,509 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2020-12-21 21:21:02,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-21 21:21:02,509 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2020-12-21 21:21:02,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-21 21:21:02,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:02,510 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:02,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:21:02,724 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:02,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1263614625, now seen corresponding path program 37 times [2020-12-21 21:21:02,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:02,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839800257] [2020-12-21 21:21:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-21 21:21:03,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839800257] [2020-12-21 21:21:03,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929113968] [2020-12-21 21:21:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:21:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:03,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-21 21:21:03,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-21 21:21:03,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:03,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-21 21:21:03,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991680362] [2020-12-21 21:21:03,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 21:21:03,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:03,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 21:21:03,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:21:03,996 INFO L87 Difference]: Start difference. First operand 205 states and 247 transitions. Second operand 42 states. [2020-12-21 21:21:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:04,171 INFO L93 Difference]: Finished difference Result 334 states and 418 transitions. [2020-12-21 21:21:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-21 21:21:04,171 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 145 [2020-12-21 21:21:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:04,172 INFO L225 Difference]: With dead ends: 334 [2020-12-21 21:21:04,172 INFO L226 Difference]: Without dead ends: 208 [2020-12-21 21:21:04,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:21:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-21 21:21:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-12-21 21:21:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-21 21:21:04,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 249 transitions. [2020-12-21 21:21:04,179 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 249 transitions. Word has length 145 [2020-12-21 21:21:04,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:04,179 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 249 transitions. [2020-12-21 21:21:04,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 21:21:04,179 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 249 transitions. [2020-12-21 21:21:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-21 21:21:04,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:04,181 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:04,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 21:21:04,394 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:04,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1238865441, now seen corresponding path program 38 times [2020-12-21 21:21:04,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:04,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361397200] [2020-12-21 21:21:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-21 21:21:05,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361397200] [2020-12-21 21:21:05,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969518509] [2020-12-21 21:21:05,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:21:05,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:21:05,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:05,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 21:21:05,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-21 21:21:05,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:05,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-21 21:21:05,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828984763] [2020-12-21 21:21:05,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:21:05,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:05,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:21:05,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:21:05,758 INFO L87 Difference]: Start difference. First operand 207 states and 249 transitions. Second operand 43 states. [2020-12-21 21:21:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:05,909 INFO L93 Difference]: Finished difference Result 336 states and 420 transitions. [2020-12-21 21:21:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 21:21:05,910 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 147 [2020-12-21 21:21:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:05,912 INFO L225 Difference]: With dead ends: 336 [2020-12-21 21:21:05,912 INFO L226 Difference]: Without dead ends: 210 [2020-12-21 21:21:05,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:21:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-21 21:21:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2020-12-21 21:21:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-21 21:21:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 251 transitions. [2020-12-21 21:21:05,919 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 251 transitions. Word has length 147 [2020-12-21 21:21:05,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:05,919 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 251 transitions. [2020-12-21 21:21:05,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:21:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 251 transitions. [2020-12-21 21:21:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-21 21:21:05,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:05,920 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:06,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:06,135 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:06,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:06,136 INFO L82 PathProgramCache]: Analyzing trace with hash -940523107, now seen corresponding path program 39 times [2020-12-21 21:21:06,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:06,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241475154] [2020-12-21 21:21:06,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-21 21:21:07,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241475154] [2020-12-21 21:21:07,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779596995] [2020-12-21 21:21:07,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:21:07,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-21 21:21:07,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:07,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 21:21:07,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 80 proven. 532 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-12-21 21:21:08,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:08,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 24] total 65 [2020-12-21 21:21:08,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837415287] [2020-12-21 21:21:08,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-21 21:21:08,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:08,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-21 21:21:08,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2020-12-21 21:21:08,834 INFO L87 Difference]: Start difference. First operand 209 states and 251 transitions. Second operand 65 states. [2020-12-21 21:21:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:10,105 INFO L93 Difference]: Finished difference Result 349 states and 440 transitions. [2020-12-21 21:21:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-21 21:21:10,106 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 149 [2020-12-21 21:21:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:10,107 INFO L225 Difference]: With dead ends: 349 [2020-12-21 21:21:10,107 INFO L226 Difference]: Without dead ends: 223 [2020-12-21 21:21:10,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1680, Invalid=5460, Unknown=0, NotChecked=0, Total=7140 [2020-12-21 21:21:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-21 21:21:10,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2020-12-21 21:21:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-21 21:21:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 263 transitions. [2020-12-21 21:21:10,114 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 263 transitions. Word has length 149 [2020-12-21 21:21:10,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:10,115 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 263 transitions. [2020-12-21 21:21:10,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-21 21:21:10,115 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 263 transitions. [2020-12-21 21:21:10,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-21 21:21:10,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:10,116 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:10,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-21 21:21:10,329 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:10,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:10,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1691192489, now seen corresponding path program 40 times [2020-12-21 21:21:10,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:10,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638140905] [2020-12-21 21:21:10,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2020-12-21 21:21:11,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638140905] [2020-12-21 21:21:11,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712350937] [2020-12-21 21:21:11,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:21:11,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:21:11,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:11,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:21:11,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 1 proven. 590 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-12-21 21:21:12,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:12,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 23] total 66 [2020-12-21 21:21:12,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794201004] [2020-12-21 21:21:12,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-21 21:21:12,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:12,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-21 21:21:12,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2020-12-21 21:21:12,862 INFO L87 Difference]: Start difference. First operand 219 states and 263 transitions. Second operand 66 states. [2020-12-21 21:21:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:13,261 INFO L93 Difference]: Finished difference Result 364 states and 458 transitions. [2020-12-21 21:21:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-21 21:21:13,261 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 156 [2020-12-21 21:21:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:13,262 INFO L225 Difference]: With dead ends: 364 [2020-12-21 21:21:13,263 INFO L226 Difference]: Without dead ends: 232 [2020-12-21 21:21:13,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2020-12-21 21:21:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-21 21:21:13,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 227. [2020-12-21 21:21:13,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-21 21:21:13,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 273 transitions. [2020-12-21 21:21:13,270 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 273 transitions. Word has length 156 [2020-12-21 21:21:13,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:13,271 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 273 transitions. [2020-12-21 21:21:13,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-21 21:21:13,271 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 273 transitions. [2020-12-21 21:21:13,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-21 21:21:13,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:13,272 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:13,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:13,488 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:13,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:13,489 INFO L82 PathProgramCache]: Analyzing trace with hash -682288297, now seen corresponding path program 41 times [2020-12-21 21:21:13,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:13,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238890017] [2020-12-21 21:21:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2020-12-21 21:21:14,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238890017] [2020-12-21 21:21:14,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679158648] [2020-12-21 21:21:14,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:22:02,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-12-21 21:22:02,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:02,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:22:02,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 1 proven. 651 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2020-12-21 21:22:04,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:04,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 24] total 68 [2020-12-21 21:22:04,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992515315] [2020-12-21 21:22:04,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-21 21:22:04,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:04,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-21 21:22:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1310, Invalid=3246, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 21:22:04,010 INFO L87 Difference]: Start difference. First operand 227 states and 273 transitions. Second operand 68 states. [2020-12-21 21:22:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:04,378 INFO L93 Difference]: Finished difference Result 378 states and 476 transitions. [2020-12-21 21:22:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-21 21:22:04,379 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 161 [2020-12-21 21:22:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:04,380 INFO L225 Difference]: With dead ends: 378 [2020-12-21 21:22:04,380 INFO L226 Difference]: Without dead ends: 240 [2020-12-21 21:22:04,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1310, Invalid=3246, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 21:22:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-21 21:22:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2020-12-21 21:22:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-21 21:22:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 283 transitions. [2020-12-21 21:22:04,387 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 283 transitions. Word has length 161 [2020-12-21 21:22:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:04,387 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 283 transitions. [2020-12-21 21:22:04,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-21 21:22:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 283 transitions. [2020-12-21 21:22:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-21 21:22:04,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:04,389 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:04,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:04,590 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:04,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1050437843, now seen corresponding path program 42 times [2020-12-21 21:22:04,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:04,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020745474] [2020-12-21 21:22:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-12-21 21:22:05,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020745474] [2020-12-21 21:22:05,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251861239] [2020-12-21 21:22:05,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:22:23,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2020-12-21 21:22:23,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:23,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:22:23,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2020-12-21 21:22:24,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:24,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 25] total 70 [2020-12-21 21:22:24,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616512513] [2020-12-21 21:22:24,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-21 21:22:24,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:24,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-21 21:22:24,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3450, Unknown=0, NotChecked=0, Total=4830 [2020-12-21 21:22:24,786 INFO L87 Difference]: Start difference. First operand 235 states and 283 transitions. Second operand 70 states. [2020-12-21 21:22:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:25,149 INFO L93 Difference]: Finished difference Result 392 states and 494 transitions. [2020-12-21 21:22:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-21 21:22:25,150 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 166 [2020-12-21 21:22:25,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:25,152 INFO L225 Difference]: With dead ends: 392 [2020-12-21 21:22:25,152 INFO L226 Difference]: Without dead ends: 248 [2020-12-21 21:22:25,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1380, Invalid=3450, Unknown=0, NotChecked=0, Total=4830 [2020-12-21 21:22:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-21 21:22:25,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 243. [2020-12-21 21:22:25,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-21 21:22:25,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 293 transitions. [2020-12-21 21:22:25,159 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 293 transitions. Word has length 166 [2020-12-21 21:22:25,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:25,160 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 293 transitions. [2020-12-21 21:22:25,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-21 21:22:25,160 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 293 transitions. [2020-12-21 21:22:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-21 21:22:25,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:25,161 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:25,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-21 21:22:25,362 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:25,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:25,363 INFO L82 PathProgramCache]: Analyzing trace with hash -180945709, now seen corresponding path program 43 times [2020-12-21 21:22:25,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:25,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550083445] [2020-12-21 21:22:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-21 21:22:26,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550083445] [2020-12-21 21:22:26,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986013107] [2020-12-21 21:22:26,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:22:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:26,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-21 21:22:26,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-21 21:22:27,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:27,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-21 21:22:27,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367914931] [2020-12-21 21:22:27,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-21 21:22:27,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:27,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-21 21:22:27,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:22:27,067 INFO L87 Difference]: Start difference. First operand 243 states and 293 transitions. Second operand 49 states. [2020-12-21 21:22:27,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:27,254 INFO L93 Difference]: Finished difference Result 396 states and 496 transitions. [2020-12-21 21:22:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 21:22:27,255 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 171 [2020-12-21 21:22:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:27,256 INFO L225 Difference]: With dead ends: 396 [2020-12-21 21:22:27,256 INFO L226 Difference]: Without dead ends: 246 [2020-12-21 21:22:27,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:22:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-21 21:22:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2020-12-21 21:22:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-12-21 21:22:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 295 transitions. [2020-12-21 21:22:27,264 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 295 transitions. Word has length 171 [2020-12-21 21:22:27,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:27,264 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 295 transitions. [2020-12-21 21:22:27,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-21 21:22:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 295 transitions. [2020-12-21 21:22:27,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-21 21:22:27,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:27,265 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:27,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-21 21:22:27,479 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:27,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1258063215, now seen corresponding path program 44 times [2020-12-21 21:22:27,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:27,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766130958] [2020-12-21 21:22:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2899 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-21 21:22:28,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766130958] [2020-12-21 21:22:28,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468949886] [2020-12-21 21:22:28,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:22:29,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:22:29,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:29,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-21 21:22:29,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2899 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-21 21:22:29,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:29,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-21 21:22:29,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233593017] [2020-12-21 21:22:29,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 21:22:29,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:29,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 21:22:29,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:22:29,234 INFO L87 Difference]: Start difference. First operand 245 states and 295 transitions. Second operand 50 states. [2020-12-21 21:22:29,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:29,433 INFO L93 Difference]: Finished difference Result 398 states and 498 transitions. [2020-12-21 21:22:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-21 21:22:29,433 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 173 [2020-12-21 21:22:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:29,435 INFO L225 Difference]: With dead ends: 398 [2020-12-21 21:22:29,435 INFO L226 Difference]: Without dead ends: 248 [2020-12-21 21:22:29,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:22:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-21 21:22:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2020-12-21 21:22:29,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-21 21:22:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 297 transitions. [2020-12-21 21:22:29,443 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 297 transitions. Word has length 173 [2020-12-21 21:22:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:29,443 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 297 transitions. [2020-12-21 21:22:29,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 21:22:29,443 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 297 transitions. [2020-12-21 21:22:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-21 21:22:29,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:29,445 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:29,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-21 21:22:29,657 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:29,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:29,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1280868145, now seen corresponding path program 45 times [2020-12-21 21:22:29,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:29,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541527006] [2020-12-21 21:22:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-12-21 21:22:31,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541527006] [2020-12-21 21:22:31,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834688782] [2020-12-21 21:22:31,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:22:32,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2020-12-21 21:22:32,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:32,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-21 21:22:32,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 94 proven. 782 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2020-12-21 21:22:33,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:33,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 28] total 76 [2020-12-21 21:22:33,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343625007] [2020-12-21 21:22:33,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-21 21:22:33,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-21 21:22:33,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1650, Invalid=4050, Unknown=0, NotChecked=0, Total=5700 [2020-12-21 21:22:33,686 INFO L87 Difference]: Start difference. First operand 247 states and 297 transitions. Second operand 76 states. [2020-12-21 21:22:35,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:35,379 INFO L93 Difference]: Finished difference Result 411 states and 518 transitions. [2020-12-21 21:22:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-21 21:22:35,380 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 175 [2020-12-21 21:22:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:35,381 INFO L225 Difference]: With dead ends: 411 [2020-12-21 21:22:35,381 INFO L226 Difference]: Without dead ends: 261 [2020-12-21 21:22:35,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2298, Invalid=7602, Unknown=0, NotChecked=0, Total=9900 [2020-12-21 21:22:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-21 21:22:35,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2020-12-21 21:22:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-21 21:22:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 309 transitions. [2020-12-21 21:22:35,389 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 309 transitions. Word has length 175 [2020-12-21 21:22:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:35,389 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 309 transitions. [2020-12-21 21:22:35,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-21 21:22:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 309 transitions. [2020-12-21 21:22:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-21 21:22:35,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:35,391 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:35,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:35,607 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:35,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1237945143, now seen corresponding path program 46 times [2020-12-21 21:22:35,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:35,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766384281] [2020-12-21 21:22:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2020-12-21 21:22:37,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766384281] [2020-12-21 21:22:37,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367479482] [2020-12-21 21:22:37,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:22:37,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:22:37,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:37,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-21 21:22:37,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2020-12-21 21:22:37,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:37,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-21 21:22:37,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570872593] [2020-12-21 21:22:37,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-21 21:22:37,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:37,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-21 21:22:37,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:22:37,553 INFO L87 Difference]: Start difference. First operand 257 states and 309 transitions. Second operand 53 states. [2020-12-21 21:22:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:37,757 INFO L93 Difference]: Finished difference Result 416 states and 520 transitions. [2020-12-21 21:22:37,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-21 21:22:37,757 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 182 [2020-12-21 21:22:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:37,759 INFO L225 Difference]: With dead ends: 416 [2020-12-21 21:22:37,759 INFO L226 Difference]: Without dead ends: 260 [2020-12-21 21:22:37,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:22:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-21 21:22:37,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2020-12-21 21:22:37,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-21 21:22:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 311 transitions. [2020-12-21 21:22:37,766 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 311 transitions. Word has length 182 [2020-12-21 21:22:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:37,766 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 311 transitions. [2020-12-21 21:22:37,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-21 21:22:37,767 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 311 transitions. [2020-12-21 21:22:37,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-21 21:22:37,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:37,768 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:37,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-21 21:22:37,982 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:37,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:37,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1712695993, now seen corresponding path program 47 times [2020-12-21 21:22:37,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:37,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330578050] [2020-12-21 21:22:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2020-12-21 21:22:39,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330578050] [2020-12-21 21:22:39,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032399958] [2020-12-21 21:22:39,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:23:21,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2020-12-21 21:23:21,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:21,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 21:23:21,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 1 proven. 852 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2020-12-21 21:23:23,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:23,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 27] total 78 [2020-12-21 21:23:23,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37921149] [2020-12-21 21:23:23,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-21 21:23:23,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:23,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-21 21:23:23,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1728, Invalid=4278, Unknown=0, NotChecked=0, Total=6006 [2020-12-21 21:23:23,395 INFO L87 Difference]: Start difference. First operand 259 states and 311 transitions. Second operand 78 states. [2020-12-21 21:23:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:23,866 INFO L93 Difference]: Finished difference Result 428 states and 538 transitions. [2020-12-21 21:23:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-21 21:23:23,866 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 184 [2020-12-21 21:23:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:23,868 INFO L225 Difference]: With dead ends: 428 [2020-12-21 21:23:23,868 INFO L226 Difference]: Without dead ends: 272 [2020-12-21 21:23:23,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1728, Invalid=4278, Unknown=0, NotChecked=0, Total=6006 [2020-12-21 21:23:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-21 21:23:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 267. [2020-12-21 21:23:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-21 21:23:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 321 transitions. [2020-12-21 21:23:23,876 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 321 transitions. Word has length 184 [2020-12-21 21:23:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:23,877 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 321 transitions. [2020-12-21 21:23:23,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-21 21:23:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 321 transitions. [2020-12-21 21:23:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-12-21 21:23:23,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:23,878 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:24,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-21 21:23:24,079 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:24,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:24,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1136663111, now seen corresponding path program 48 times [2020-12-21 21:23:24,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:24,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497921217] [2020-12-21 21:23:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3527 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2020-12-21 21:23:25,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497921217] [2020-12-21 21:23:25,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856241018] [2020-12-21 21:23:25,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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