/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/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:59:43,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:59:43,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:59:43,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:59:43,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:59:43,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:59:43,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:59:43,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:59:43,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:59:43,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:59:43,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:59:43,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:59:43,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:59:43,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:59:43,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:59:43,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:59:43,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:59:43,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:59:43,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:59:43,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:59:43,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:59:43,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:59:43,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:59:43,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:59:43,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:59:43,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 03:59:43,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 03:59:43,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 03:59:43,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 03:59:43,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 03:59:43,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 03:59:43,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 03:59:43,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 03:59:43,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:59:43,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:59:43,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:59:43,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:59:43,494 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:59:43,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:59:43,496 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:59:43,496 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:59:43,496 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:59:43,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:59:43,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:59:43,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:59:43,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:59:43,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:59:43,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:59:43,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:59:43,498 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:59:43,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:59:43,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:59:43,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:59:43,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:59:43,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:59:43,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:59:43,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:59:43,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:59:43,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:59:43,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:59:43,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:59:43,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:59:43,501 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:59:43,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:59:43,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:59:43,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:59:43,983 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:59:43,984 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:59:43,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i [2020-12-22 03:59:44,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a9e54165/561a94e193cb4a76a05f8727ed86ff3c/FLAG9a8aa15b4 [2020-12-22 03:59:44,876 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:59:44,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i [2020-12-22 03:59:44,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a9e54165/561a94e193cb4a76a05f8727ed86ff3c/FLAG9a8aa15b4 [2020-12-22 03:59:45,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a9e54165/561a94e193cb4a76a05f8727ed86ff3c [2020-12-22 03:59:45,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:59:45,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:59:45,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:59:45,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:59:45,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:59:45,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:59:45" (1/1) ... [2020-12-22 03:59:45,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798afb21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:45, skipping insertion in model container [2020-12-22 03:59:45,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:59:45" (1/1) ... [2020-12-22 03:59:45,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:59:45,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:59:45,455 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/list-ext2-properties/list_and_tree_cnstr-1.i[24291,24304] [2020-12-22 03:59:45,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:59:45,485 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:59:45,572 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/list-ext2-properties/list_and_tree_cnstr-1.i[24291,24304] [2020-12-22 03:59:45,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:59:45,634 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:59:45,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:45 WrapperNode [2020-12-22 03:59:45,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:59:45,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:59:45,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:59:45,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:59:45,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:45" (1/1) ... [2020-12-22 03:59:45,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:45" (1/1) ... [2020-12-22 03:59:45,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:59:45,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:59:45,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:59:45,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:59:45,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:45" (1/1) ... [2020-12-22 03:59:45,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:45" (1/1) ... [2020-12-22 03:59:45,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:45" (1/1) ... [2020-12-22 03:59:45,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:45" (1/1) ... [2020-12-22 03:59:45,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:45" (1/1) ... [2020-12-22 03:59:45,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:45" (1/1) ... [2020-12-22 03:59:45,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:45" (1/1) ... [2020-12-22 03:59:45,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:59:45,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:59:45,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:59:45,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:59:45,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:45" (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 [2020-12-22 03:59:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:59:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:59:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 03:59:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 03:59:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:59:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 03:59:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 03:59:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:59:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:59:45,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:59:46,626 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:59:46,626 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-22 03:59:46,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:59:46 BoogieIcfgContainer [2020-12-22 03:59:46,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:59:46,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:59:46,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:59:46,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:59:46,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:59:45" (1/3) ... [2020-12-22 03:59:46,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602b80c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:59:46, skipping insertion in model container [2020-12-22 03:59:46,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:45" (2/3) ... [2020-12-22 03:59:46,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602b80c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:59:46, skipping insertion in model container [2020-12-22 03:59:46,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:59:46" (3/3) ... [2020-12-22 03:59:46,639 INFO L111 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-12-22 03:59:46,646 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:59:46,652 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:59:46,672 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:59:46,702 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:59:46,702 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:59:46,702 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:59:46,702 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:59:46,703 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:59:46,703 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:59:46,703 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:59:46,703 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:59:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-12-22 03:59:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 03:59:46,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:46,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:46,731 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:46,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:46,738 INFO L82 PathProgramCache]: Analyzing trace with hash -372423763, now seen corresponding path program 1 times [2020-12-22 03:59:46,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:46,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97971330] [2020-12-22 03:59:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:59:46,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97971330] [2020-12-22 03:59:46,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:59:46,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:59:46,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112106669] [2020-12-22 03:59:46,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:59:46,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:46,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:59:46,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:59:46,948 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 2 states. [2020-12-22 03:59:46,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:46,972 INFO L93 Difference]: Finished difference Result 98 states and 156 transitions. [2020-12-22 03:59:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:59:46,974 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-12-22 03:59:46,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:46,984 INFO L225 Difference]: With dead ends: 98 [2020-12-22 03:59:46,984 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 03:59:46,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:59:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 03:59:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 03:59:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 03:59:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2020-12-22 03:59:47,040 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 16 [2020-12-22 03:59:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:47,042 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2020-12-22 03:59:47,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:59:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2020-12-22 03:59:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 03:59:47,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:47,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:47,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:59:47,046 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:47,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1965259271, now seen corresponding path program 1 times [2020-12-22 03:59:47,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:47,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77836600] [2020-12-22 03:59:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:59:47,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77836600] [2020-12-22 03:59:47,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:59:47,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:59:47,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305576471] [2020-12-22 03:59:47,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:59:47,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:47,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:59:47,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:59:47,150 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand 3 states. [2020-12-22 03:59:47,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:47,170 INFO L93 Difference]: Finished difference Result 71 states and 97 transitions. [2020-12-22 03:59:47,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:59:47,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-22 03:59:47,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:47,174 INFO L225 Difference]: With dead ends: 71 [2020-12-22 03:59:47,174 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 03:59:47,175 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 [2020-12-22 03:59:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 03:59:47,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 03:59:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 03:59:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 73 transitions. [2020-12-22 03:59:47,185 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 73 transitions. Word has length 21 [2020-12-22 03:59:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:47,185 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 73 transitions. [2020-12-22 03:59:47,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:59:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 73 transitions. [2020-12-22 03:59:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 03:59:47,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:47,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:47,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:59:47,187 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:47,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1325693868, now seen corresponding path program 1 times [2020-12-22 03:59:47,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:47,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720770564] [2020-12-22 03:59:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:59:47,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720770564] [2020-12-22 03:59:47,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:59:47,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:59:47,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028156395] [2020-12-22 03:59:47,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:59:47,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:47,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:59:47,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:59:47,270 INFO L87 Difference]: Start difference. First operand 51 states and 73 transitions. Second operand 3 states. [2020-12-22 03:59:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:47,309 INFO L93 Difference]: Finished difference Result 89 states and 127 transitions. [2020-12-22 03:59:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:59:47,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-22 03:59:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:47,313 INFO L225 Difference]: With dead ends: 89 [2020-12-22 03:59:47,314 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 03:59:47,314 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 [2020-12-22 03:59:47,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 03:59:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-22 03:59:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 03:59:47,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 75 transitions. [2020-12-22 03:59:47,330 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 75 transitions. Word has length 27 [2020-12-22 03:59:47,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:47,330 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 75 transitions. [2020-12-22 03:59:47,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:59:47,331 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 75 transitions. [2020-12-22 03:59:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 03:59:47,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:47,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:47,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:59:47,336 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:47,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:47,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2143342318, now seen corresponding path program 1 times [2020-12-22 03:59:47,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:47,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537252290] [2020-12-22 03:59:47,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:47,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537252290] [2020-12-22 03:59:47,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:59:47,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:59:47,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035583306] [2020-12-22 03:59:47,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:59:47,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:47,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:59:47,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:59:47,539 INFO L87 Difference]: Start difference. First operand 53 states and 75 transitions. Second operand 5 states. [2020-12-22 03:59:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:47,689 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2020-12-22 03:59:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:59:47,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-22 03:59:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:47,691 INFO L225 Difference]: With dead ends: 78 [2020-12-22 03:59:47,691 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 03:59:47,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:59:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 03:59:47,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2020-12-22 03:59:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 03:59:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2020-12-22 03:59:47,713 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 27 [2020-12-22 03:59:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:47,713 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2020-12-22 03:59:47,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:59:47,714 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2020-12-22 03:59:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 03:59:47,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:47,715 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:47,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 03:59:47,715 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:47,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1881014477, now seen corresponding path program 1 times [2020-12-22 03:59:47,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:47,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233788184] [2020-12-22 03:59:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:47,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233788184] [2020-12-22 03:59:47,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:59:47,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:59:47,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310335878] [2020-12-22 03:59:47,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:59:47,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:47,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:59:47,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:59:47,871 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand 5 states. [2020-12-22 03:59:48,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:48,054 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2020-12-22 03:59:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:59:48,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-22 03:59:48,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:48,057 INFO L225 Difference]: With dead ends: 80 [2020-12-22 03:59:48,057 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 03:59:48,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:59:48,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 03:59:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2020-12-22 03:59:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 03:59:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2020-12-22 03:59:48,075 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 29 [2020-12-22 03:59:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:48,078 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2020-12-22 03:59:48,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:59:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2020-12-22 03:59:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 03:59:48,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:48,080 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:48,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 03:59:48,082 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:48,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1389249843, now seen corresponding path program 1 times [2020-12-22 03:59:48,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:48,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539692753] [2020-12-22 03:59:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:48,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539692753] [2020-12-22 03:59:48,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:59:48,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:59:48,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138488763] [2020-12-22 03:59:48,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:59:48,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:48,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:59:48,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:59:48,198 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand 5 states. [2020-12-22 03:59:48,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:48,298 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2020-12-22 03:59:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:59:48,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-22 03:59:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:48,300 INFO L225 Difference]: With dead ends: 80 [2020-12-22 03:59:48,300 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 03:59:48,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:59:48,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 03:59:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-12-22 03:59:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 03:59:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2020-12-22 03:59:48,307 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 29 [2020-12-22 03:59:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:48,308 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2020-12-22 03:59:48,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:59:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2020-12-22 03:59:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 03:59:48,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:48,310 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:48,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 03:59:48,310 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:48,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:48,311 INFO L82 PathProgramCache]: Analyzing trace with hash 115063225, now seen corresponding path program 1 times [2020-12-22 03:59:48,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:48,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375958334] [2020-12-22 03:59:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:48,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375958334] [2020-12-22 03:59:48,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969942176] [2020-12-22 03:59:48,431 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 [2020-12-22 03:59:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:48,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 03:59:48,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:59:48,641 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 03:59:48,642 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:48,651 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:48,652 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:48,653 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-22 03:59:48,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 03:59:48,697 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-12-22 03:59:48,698 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:48,704 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:48,704 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:48,705 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:14 [2020-12-22 03:59:48,749 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:48,750 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 34 [2020-12-22 03:59:48,753 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:48,770 INFO L625 ElimStorePlain]: treesize reduction 12, result has 64.7 percent of original size [2020-12-22 03:59:48,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:48,776 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 03:59:48,777 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:22 [2020-12-22 03:59:48,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:48,805 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:48,858 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-22 03:59:48,859 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:48,893 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 03:59:48,894 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:48,895 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:48,896 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:48,896 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-22 03:59:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:48,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:59:48,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2020-12-22 03:59:48,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217967685] [2020-12-22 03:59:48,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 03:59:48,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:48,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 03:59:48,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:59:48,917 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand 16 states. [2020-12-22 03:59:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:49,421 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-12-22 03:59:49,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:59:49,422 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-12-22 03:59:49,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:49,423 INFO L225 Difference]: With dead ends: 82 [2020-12-22 03:59:49,423 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 03:59:49,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:59:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 03:59:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-12-22 03:59:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 03:59:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-12-22 03:59:49,431 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 31 [2020-12-22 03:59:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:49,431 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-12-22 03:59:49,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 03:59:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-12-22 03:59:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 03:59:49,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:49,433 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:49,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 03:59:49,647 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:49,648 INFO L82 PathProgramCache]: Analyzing trace with hash 978464889, now seen corresponding path program 1 times [2020-12-22 03:59:49,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:49,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160123298] [2020-12-22 03:59:49,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:49,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160123298] [2020-12-22 03:59:49,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359961948] [2020-12-22 03:59:49,762 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 [2020-12-22 03:59:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:49,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 03:59:49,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:59:49,913 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 03:59:49,914 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:49,923 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:49,924 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:49,925 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-22 03:59:49,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 03:59:49,964 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-12-22 03:59:49,966 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:49,973 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:49,973 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:49,974 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:14 [2020-12-22 03:59:50,020 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:50,020 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 34 [2020-12-22 03:59:50,022 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:50,041 INFO L625 ElimStorePlain]: treesize reduction 12, result has 64.7 percent of original size [2020-12-22 03:59:50,043 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:50,044 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 03:59:50,045 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:22 [2020-12-22 03:59:50,046 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:50,073 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:50,100 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:50,127 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:50,195 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-22 03:59:50,196 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:50,228 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 03:59:50,230 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:50,232 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:50,232 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:50,232 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-22 03:59:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:50,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:59:50,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2020-12-22 03:59:50,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823764679] [2020-12-22 03:59:50,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 03:59:50,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:50,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 03:59:50,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:59:50,255 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 16 states. [2020-12-22 03:59:50,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:50,967 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2020-12-22 03:59:50,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:59:50,969 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-12-22 03:59:50,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:50,970 INFO L225 Difference]: With dead ends: 91 [2020-12-22 03:59:50,970 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 03:59:50,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:59:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 03:59:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2020-12-22 03:59:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 03:59:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2020-12-22 03:59:50,980 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 31 [2020-12-22 03:59:50,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:50,980 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2020-12-22 03:59:50,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 03:59:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2020-12-22 03:59:50,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 03:59:50,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:50,982 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:51,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:59:51,197 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:51,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:51,198 INFO L82 PathProgramCache]: Analyzing trace with hash -20007500, now seen corresponding path program 1 times [2020-12-22 03:59:51,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:51,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354104380] [2020-12-22 03:59:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:51,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354104380] [2020-12-22 03:59:51,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021328953] [2020-12-22 03:59:51,344 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 [2020-12-22 03:59:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:51,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 03:59:51,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:59:51,569 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 03:59:51,570 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:51,582 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:51,586 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 03:59:51,587 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:51,597 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:51,600 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:51,600 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:48, output treesize:31 [2020-12-22 03:59:51,653 INFO L443 ElimStorePlain]: Different costs {0=[|v_#memory_int_41|], 2=[|v_#memory_$Pointer$.base_41|, |v_#memory_$Pointer$.offset_43|]} [2020-12-22 03:59:51,660 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2020-12-22 03:59:51,662 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:51,676 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:51,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 03:59:51,682 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 76 [2020-12-22 03:59:51,685 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:51,696 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:51,718 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:51,718 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 104 [2020-12-22 03:59:51,722 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:51,742 INFO L625 ElimStorePlain]: treesize reduction 52, result has 33.3 percent of original size [2020-12-22 03:59:51,742 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:51,743 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:132, output treesize:26 [2020-12-22 03:59:51,822 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-12-22 03:59:51,823 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:51,831 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:51,835 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 03:59:51,836 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:51,842 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:51,843 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 03:59:51,844 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:18 [2020-12-22 03:59:51,897 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:51,898 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2020-12-22 03:59:51,900 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:51,904 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:51,906 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:51,907 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:3 [2020-12-22 03:59:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:51,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:59:51,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2020-12-22 03:59:51,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146232809] [2020-12-22 03:59:51,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 03:59:51,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:51,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 03:59:51,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:59:51,915 INFO L87 Difference]: Start difference. First operand 75 states and 102 transitions. Second operand 16 states. [2020-12-22 03:59:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:52,614 INFO L93 Difference]: Finished difference Result 99 states and 129 transitions. [2020-12-22 03:59:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:59:52,615 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-12-22 03:59:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:52,616 INFO L225 Difference]: With dead ends: 99 [2020-12-22 03:59:52,616 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 03:59:52,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:59:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 03:59:52,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2020-12-22 03:59:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 03:59:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 107 transitions. [2020-12-22 03:59:52,625 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 107 transitions. Word has length 33 [2020-12-22 03:59:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:52,625 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 107 transitions. [2020-12-22 03:59:52,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 03:59:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 107 transitions. [2020-12-22 03:59:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 03:59:52,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:52,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:52,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:59:52,843 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:52,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:52,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1998658321, now seen corresponding path program 1 times [2020-12-22 03:59:52,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:52,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107816954] [2020-12-22 03:59:52,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:53,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107816954] [2020-12-22 03:59:53,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238753980] [2020-12-22 03:59:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 03:59:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 03:59:53,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:59:53,190 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 03:59:53,191 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:53,202 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:53,207 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 03:59:53,207 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:53,217 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:53,219 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:53,219 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:48, output treesize:31 [2020-12-22 03:59:53,259 INFO L443 ElimStorePlain]: Different costs {0=[|v_#memory_int_42|], 2=[|v_#memory_$Pointer$.base_43|, |v_#memory_$Pointer$.offset_45|]} [2020-12-22 03:59:53,264 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2020-12-22 03:59:53,265 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:53,278 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:53,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 03:59:53,284 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 76 [2020-12-22 03:59:53,286 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:53,297 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:53,319 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:53,320 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 104 [2020-12-22 03:59:53,322 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:53,342 INFO L625 ElimStorePlain]: treesize reduction 52, result has 33.3 percent of original size [2020-12-22 03:59:53,343 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:53,343 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:132, output treesize:26 [2020-12-22 03:59:53,406 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-12-22 03:59:53,408 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:53,420 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:53,423 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 03:59:53,424 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:53,430 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:53,431 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 03:59:53,431 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:18 [2020-12-22 03:59:53,473 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:53,473 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2020-12-22 03:59:53,475 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:53,479 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:53,483 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:53,483 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:3 [2020-12-22 03:59:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:53,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:59:53,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2020-12-22 03:59:53,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458170012] [2020-12-22 03:59:53,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 03:59:53,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:53,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 03:59:53,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:59:53,494 INFO L87 Difference]: Start difference. First operand 79 states and 107 transitions. Second operand 16 states. [2020-12-22 03:59:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:54,169 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-12-22 03:59:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:59:54,170 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-12-22 03:59:54,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:54,171 INFO L225 Difference]: With dead ends: 99 [2020-12-22 03:59:54,171 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 03:59:54,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:59:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 03:59:54,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-12-22 03:59:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 03:59:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 95 transitions. [2020-12-22 03:59:54,177 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 95 transitions. Word has length 35 [2020-12-22 03:59:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:54,178 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 95 transitions. [2020-12-22 03:59:54,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 03:59:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 95 transitions. [2020-12-22 03:59:54,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 03:59:54,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:54,179 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:54,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:59:54,395 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:54,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:54,396 INFO L82 PathProgramCache]: Analyzing trace with hash -973955345, now seen corresponding path program 2 times [2020-12-22 03:59:54,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:54,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137263756] [2020-12-22 03:59:54,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:54,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137263756] [2020-12-22 03:59:54,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219641536] [2020-12-22 03:59:54,537 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 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 [2020-12-22 03:59:54,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:59:54,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:59:54,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 03:59:54,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:59:54,710 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 03:59:54,711 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:54,722 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:54,728 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 03:59:54,728 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:54,739 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:54,740 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:54,741 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:48, output treesize:31 [2020-12-22 03:59:54,773 INFO L443 ElimStorePlain]: Different costs {0=[|v_#memory_int_43|], 2=[|v_#memory_$Pointer$.offset_47|, |v_#memory_$Pointer$.base_45|]} [2020-12-22 03:59:54,778 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2020-12-22 03:59:54,779 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:54,793 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:54,813 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:54,813 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 137 [2020-12-22 03:59:54,817 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:54,841 INFO L625 ElimStorePlain]: treesize reduction 52, result has 53.2 percent of original size [2020-12-22 03:59:54,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 03:59:54,845 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2020-12-22 03:59:54,846 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:54,853 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:54,853 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:54,854 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:132, output treesize:26 [2020-12-22 03:59:54,916 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-12-22 03:59:54,918 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:54,926 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:54,929 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 03:59:54,931 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:54,937 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:54,939 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 03:59:54,939 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:18 [2020-12-22 03:59:54,977 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:54,977 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2020-12-22 03:59:54,980 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:54,988 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:54,990 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:54,990 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:3 [2020-12-22 03:59:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:54,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:59:54,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2020-12-22 03:59:55,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738704973] [2020-12-22 03:59:55,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 03:59:55,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:55,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 03:59:55,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:59:55,001 INFO L87 Difference]: Start difference. First operand 70 states and 95 transitions. Second operand 16 states. [2020-12-22 03:59:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:55,522 INFO L93 Difference]: Finished difference Result 90 states and 117 transitions. [2020-12-22 03:59:55,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:59:55,522 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-12-22 03:59:55,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:55,524 INFO L225 Difference]: With dead ends: 90 [2020-12-22 03:59:55,524 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 03:59:55,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2020-12-22 03:59:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 03:59:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2020-12-22 03:59:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 03:59:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2020-12-22 03:59:55,542 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 35 [2020-12-22 03:59:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:55,542 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2020-12-22 03:59:55,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 03:59:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2020-12-22 03:59:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 03:59:55,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:55,546 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:55,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 03:59:55,747 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:55,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1696962272, now seen corresponding path program 2 times [2020-12-22 03:59:55,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:55,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318232551] [2020-12-22 03:59:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:55,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318232551] [2020-12-22 03:59:55,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789760936] [2020-12-22 03:59:55,948 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 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 [2020-12-22 03:59:56,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:59:56,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:59:56,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 03:59:56,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:59:56,056 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 03:59:56,057 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:56,061 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:56,061 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:56,062 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 03:59:56,091 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:56,091 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-12-22 03:59:56,096 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,098 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:56,107 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:56,111 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 03:59:56,112 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:56,121 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:56,122 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:56,122 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-12-22 03:59:56,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 03:59:56,138 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-12-22 03:59:56,139 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:56,144 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:56,145 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:56,145 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-12-22 03:59:56,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 03:59:56,173 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-12-22 03:59:56,176 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:56,187 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:56,190 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:56,190 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:25 [2020-12-22 03:59:56,234 INFO L348 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-12-22 03:59:56,235 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-12-22 03:59:56,236 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:56,245 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:56,247 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 03:59:56,248 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:25 [2020-12-22 03:59:56,332 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:56,332 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 68 [2020-12-22 03:59:56,335 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:56,373 INFO L625 ElimStorePlain]: treesize reduction 28, result has 59.4 percent of original size [2020-12-22 03:59:56,377 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 03:59:56,377 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,380 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 03:59:56,384 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,388 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 03:59:56,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,394 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 03:59:56,399 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-22 03:59:56,399 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:37 [2020-12-22 03:59:56,401 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 03:59:56,402 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,403 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,409 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 03:59:56,409 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,411 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,411 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 03:59:56,412 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,414 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,415 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:56,416 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 03:59:58,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 03:59:58,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:58,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:58,466 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 03:59:58,467 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:58,470 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:58,471 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:58,473 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 03:59:58,618 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-22 03:59:58,618 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:59:58,697 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-12-22 03:59:58,699 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:59:58,703 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:59:58,705 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:59:58,705 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-12-22 03:59:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 03:59:58,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:59:58,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2020-12-22 03:59:58,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103989590] [2020-12-22 03:59:58,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 03:59:58,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 03:59:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=219, Unknown=1, NotChecked=0, Total=272 [2020-12-22 03:59:58,720 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand 17 states. [2020-12-22 04:00:27,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:00:27,389 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2020-12-22 04:00:27,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:00:27,390 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-12-22 04:00:27,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:00:27,391 INFO L225 Difference]: With dead ends: 109 [2020-12-22 04:00:27,391 INFO L226 Difference]: Without dead ends: 103 [2020-12-22 04:00:27,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=224, Invalid=824, Unknown=8, NotChecked=0, Total=1056 [2020-12-22 04:00:27,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-22 04:00:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-12-22 04:00:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 04:00:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2020-12-22 04:00:27,397 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 35 [2020-12-22 04:00:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:00:27,398 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2020-12-22 04:00:27,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:00:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2020-12-22 04:00:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:00:27,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:00:27,399 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:00:27,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:00:27,614 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:00:27,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:00:27,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1996664224, now seen corresponding path program 1 times [2020-12-22 04:00:27,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:00:27,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786175647] [2020-12-22 04:00:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:00:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:00:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:00:27,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786175647] [2020-12-22 04:00:27,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552144795] [2020-12-22 04:00:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 04:00:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:00:27,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:00:27,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:00:27,991 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 04:00:27,992 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:27,997 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:27,998 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:27,998 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 04:00:28,024 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:28,024 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-12-22 04:00:28,026 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,028 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:28,039 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:28,051 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 04:00:28,052 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:28,063 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:28,064 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:28,064 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-12-22 04:00:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:00:28,080 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-12-22 04:00:28,081 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:28,088 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:28,089 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:28,089 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-12-22 04:00:28,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:00:28,143 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-12-22 04:00:28,145 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:28,154 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:28,155 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:28,155 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:25 [2020-12-22 04:00:28,199 INFO L348 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-12-22 04:00:28,200 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-12-22 04:00:28,201 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:28,211 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:28,213 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:00:28,213 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:25 [2020-12-22 04:00:28,295 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:28,295 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 68 [2020-12-22 04:00:28,298 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:28,339 INFO L625 ElimStorePlain]: treesize reduction 28, result has 59.4 percent of original size [2020-12-22 04:00:28,343 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:28,343 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,345 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,347 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:28,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,350 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,351 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:00:28,352 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,353 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,355 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:28,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,359 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-22 04:00:28,360 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:37 [2020-12-22 04:00:28,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:28,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,363 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,365 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:28,366 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,367 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,368 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:00:28,369 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,370 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:28,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:28,373 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,421 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:30,422 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,424 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:00:30,426 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,428 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,429 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:30,432 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,476 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:30,477 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,481 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,482 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:00:30,483 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,484 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:30,488 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,528 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:30,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,534 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:00:30,537 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,539 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,540 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:30,543 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,643 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-22 04:00:30,643 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:30,702 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-12-22 04:00:30,704 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:30,708 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:30,709 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:30,710 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-12-22 04:00:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:00:30,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:00:30,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2020-12-22 04:00:30,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409678609] [2020-12-22 04:00:30,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:00:30,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:00:30,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:00:30,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=220, Unknown=1, NotChecked=0, Total=272 [2020-12-22 04:00:30,720 INFO L87 Difference]: Start difference. First operand 80 states and 107 transitions. Second operand 17 states. [2020-12-22 04:00:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:00:51,021 INFO L93 Difference]: Finished difference Result 124 states and 158 transitions. [2020-12-22 04:00:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:00:51,021 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-12-22 04:00:51,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:00:51,022 INFO L225 Difference]: With dead ends: 124 [2020-12-22 04:00:51,022 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 04:00:51,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=221, Invalid=829, Unknown=6, NotChecked=0, Total=1056 [2020-12-22 04:00:51,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 04:00:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 84. [2020-12-22 04:00:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 04:00:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 112 transitions. [2020-12-22 04:00:51,028 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 112 transitions. Word has length 35 [2020-12-22 04:00:51,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:00:51,029 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 112 transitions. [2020-12-22 04:00:51,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:00:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 112 transitions. [2020-12-22 04:00:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:00:51,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:00:51,030 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:00:51,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:00:51,243 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:00:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:00:51,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1258149093, now seen corresponding path program 1 times [2020-12-22 04:00:51,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:00:51,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785296643] [2020-12-22 04:00:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:00:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:00:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:00:51,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785296643] [2020-12-22 04:00:51,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260566422] [2020-12-22 04:00:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 04:00:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:00:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:00:51,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:00:51,559 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 04:00:51,559 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:51,565 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:51,566 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:51,566 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 04:00:51,603 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:51,603 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-12-22 04:00:51,605 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:51,607 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:51,623 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:51,630 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 04:00:51,631 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:51,644 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:51,646 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:51,647 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:31 [2020-12-22 04:00:51,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:00:51,694 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-12-22 04:00:51,695 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:51,705 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:51,706 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:51,706 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:25 [2020-12-22 04:00:51,754 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:51,758 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-12-22 04:00:51,760 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:51,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:51,762 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:51,774 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:51,779 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-12-22 04:00:51,780 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:51,791 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:51,792 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:51,792 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2020-12-22 04:00:51,848 INFO L348 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-12-22 04:00:51,848 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-12-22 04:00:51,850 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:51,862 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:51,864 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:00:51,864 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:30 [2020-12-22 04:00:51,937 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2020-12-22 04:00:51,938 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:51,977 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:51,982 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 04:00:51,982 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:37 [2020-12-22 04:00:52,065 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-12-22 04:00:52,067 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:52,074 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:52,076 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:52,076 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:41, output treesize:3 [2020-12-22 04:00:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:00:52,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:00:52,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2020-12-22 04:00:52,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765826658] [2020-12-22 04:00:52,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:00:52,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:00:52,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:00:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:00:52,109 INFO L87 Difference]: Start difference. First operand 84 states and 112 transitions. Second operand 18 states. [2020-12-22 04:00:52,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:00:52,914 INFO L93 Difference]: Finished difference Result 122 states and 155 transitions. [2020-12-22 04:00:52,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:00:52,915 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-12-22 04:00:52,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:00:52,916 INFO L225 Difference]: With dead ends: 122 [2020-12-22 04:00:52,916 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 04:00:52,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:00:52,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 04:00:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2020-12-22 04:00:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 04:00:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2020-12-22 04:00:52,924 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 37 [2020-12-22 04:00:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:00:52,924 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2020-12-22 04:00:52,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:00:52,924 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2020-12-22 04:00:52,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:00:52,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:00:52,925 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:00:53,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:00:53,140 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:00:53,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:00:53,141 INFO L82 PathProgramCache]: Analyzing trace with hash -233446117, now seen corresponding path program 3 times [2020-12-22 04:00:53,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:00:53,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389389307] [2020-12-22 04:00:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:00:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:00:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:00:53,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389389307] [2020-12-22 04:00:53,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900460980] [2020-12-22 04:00:53,392 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 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 [2020-12-22 04:00:53,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:00:53,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:00:53,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:00:53,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:00:53,535 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 04:00:53,536 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:53,538 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:53,539 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:53,539 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-22 04:00:53,637 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:53,638 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-12-22 04:00:53,640 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:53,641 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:53,653 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:53,654 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:53,654 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2020-12-22 04:00:53,698 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 04:00:53,698 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:53,714 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:53,720 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 04:00:53,720 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:53,735 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:53,736 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:53,736 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:59, output treesize:54 [2020-12-22 04:00:53,792 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:53,792 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 32 [2020-12-22 04:00:53,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:00:53,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:00:53,797 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:53,826 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:53,827 INFO L443 ElimStorePlain]: Different costs {0=[|v_#memory_int_59|], 2=[|v_#memory_$Pointer$.offset_51|, |v_#memory_$Pointer$.base_51|]} [2020-12-22 04:00:53,835 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 04:00:53,836 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:53,862 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:53,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:00:53,869 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2020-12-22 04:00:53,870 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:53,891 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:53,919 INFO L348 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2020-12-22 04:00:53,920 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2020-12-22 04:00:53,922 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:53,940 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:53,941 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:53,941 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:103, output treesize:50 [2020-12-22 04:00:54,015 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:54,016 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 175 [2020-12-22 04:00:54,019 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[10, 3, 2, 1] term [2020-12-22 04:00:54,020 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-22 04:00:54,023 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:54,053 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:54,058 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 126 [2020-12-22 04:00:54,060 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:54,088 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:54,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:00:54,095 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 23 [2020-12-22 04:00:54,096 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:54,117 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:54,119 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:54,119 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:206, output treesize:152 [2020-12-22 04:00:54,183 INFO L443 ElimStorePlain]: Different costs {2=[|v_#memory_int_61|], 6=[|v_#memory_$Pointer$.base_53|, |v_#memory_$Pointer$.offset_53|]} [2020-12-22 04:00:54,189 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 66 [2020-12-22 04:00:54,190 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:54,250 INFO L625 ElimStorePlain]: treesize reduction 28, result has 92.3 percent of original size [2020-12-22 04:00:54,302 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:54,303 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 326 treesize of output 295 [2020-12-22 04:00:54,308 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[8, 3, 2, 1] term [2020-12-22 04:00:54,308 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-22 04:00:54,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:00:54,311 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 3, 2, 1] term [2020-12-22 04:00:54,311 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-22 04:00:54,313 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 10 disjuncts [2020-12-22 04:00:54,314 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-22 04:00:54,315 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-22 04:00:54,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-22 04:00:54,320 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2020-12-22 04:00:54,390 INFO L625 ElimStorePlain]: treesize reduction 792, result has 22.5 percent of original size [2020-12-22 04:00:54,429 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:54,430 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 220 treesize of output 227 [2020-12-22 04:00:54,433 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:54,446 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:54,447 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:00:54,447 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:385, output treesize:77 [2020-12-22 04:00:54,504 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:54,505 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 50 [2020-12-22 04:00:54,507 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 04:00:54,509 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:00:54,523 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:54,526 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2020-12-22 04:00:54,527 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:00:54,537 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:00:54,538 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:00:54,538 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:95, output treesize:18 [2020-12-22 04:00:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:00:54,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:00:54,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-12-22 04:00:54,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154963509] [2020-12-22 04:00:54,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:00:54,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:00:54,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:00:54,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:00:54,639 INFO L87 Difference]: Start difference. First operand 91 states and 120 transitions. Second operand 21 states. [2020-12-22 04:00:55,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:00:55,969 INFO L93 Difference]: Finished difference Result 125 states and 158 transitions. [2020-12-22 04:00:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:00:55,969 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-12-22 04:00:55,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:00:55,971 INFO L225 Difference]: With dead ends: 125 [2020-12-22 04:00:55,971 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 04:00:55,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:00:55,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 04:00:55,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2020-12-22 04:00:55,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 04:00:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 130 transitions. [2020-12-22 04:00:55,979 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 130 transitions. Word has length 37 [2020-12-22 04:00:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:00:55,979 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 130 transitions. [2020-12-22 04:00:55,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:00:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 130 transitions. [2020-12-22 04:00:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:00:55,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:00:55,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:00:56,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:00:56,186 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:00:56,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:00:56,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1007382053, now seen corresponding path program 1 times [2020-12-22 04:00:56,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:00:56,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57476066] [2020-12-22 04:00:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:00:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:00:56,211 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:00:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:00:56,229 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:00:56,263 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 04:00:56,264 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 04:00:56,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 04:00:56,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:00:56 BoogieIcfgContainer [2020-12-22 04:00:56,350 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:00:56,351 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:00:56,351 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:00:56,352 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:00:56,352 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:59:46" (3/4) ... [2020-12-22 04:00:56,355 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 04:00:56,435 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/list-ext2-properties/list_and_tree_cnstr-1.i-witness.graphml [2020-12-22 04:00:56,435 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:00:56,436 INFO L168 Benchmark]: Toolchain (without parser) took 71349.12 ms. Allocated memory was 173.0 MB in the beginning and 320.9 MB in the end (delta: 147.8 MB). Free memory was 147.6 MB in the beginning and 158.6 MB in the end (delta: -11.0 MB). Peak memory consumption was 137.9 MB. Max. memory is 8.0 GB. [2020-12-22 04:00:56,437 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 173.0 MB. Free memory is still 148.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:00:56,437 INFO L168 Benchmark]: CACSL2BoogieTranslator took 546.43 ms. Allocated memory is still 173.0 MB. Free memory was 147.4 MB in the beginning and 124.9 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:00:56,437 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.49 ms. Allocated memory is still 173.0 MB. Free memory was 124.9 MB in the beginning and 122.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:00:56,438 INFO L168 Benchmark]: Boogie Preprocessor took 107.26 ms. Allocated memory is still 173.0 MB. Free memory was 122.6 MB in the beginning and 155.3 MB in the end (delta: -32.8 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2020-12-22 04:00:56,439 INFO L168 Benchmark]: RCFGBuilder took 822.32 ms. Allocated memory is still 173.0 MB. Free memory was 155.3 MB in the beginning and 122.8 MB in the end (delta: 32.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:00:56,439 INFO L168 Benchmark]: TraceAbstraction took 69720.32 ms. Allocated memory was 173.0 MB in the beginning and 320.9 MB in the end (delta: 147.8 MB). Free memory was 122.3 MB in the beginning and 162.8 MB in the end (delta: -40.5 MB). Peak memory consumption was 108.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:00:56,440 INFO L168 Benchmark]: Witness Printer took 83.88 ms. Allocated memory is still 320.9 MB. Free memory was 162.8 MB in the beginning and 158.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-22 04:00:56,443 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 173.0 MB. Free memory is still 148.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 546.43 ms. Allocated memory is still 173.0 MB. Free memory was 147.4 MB in the beginning and 124.9 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 61.49 ms. Allocated memory is still 173.0 MB. Free memory was 124.9 MB in the beginning and 122.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 107.26 ms. Allocated memory is still 173.0 MB. Free memory was 122.6 MB in the beginning and 155.3 MB in the end (delta: -32.8 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 822.32 ms. Allocated memory is still 173.0 MB. Free memory was 155.3 MB in the beginning and 122.8 MB in the end (delta: 32.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 69720.32 ms. Allocated memory was 173.0 MB in the beginning and 320.9 MB in the end (delta: 147.8 MB). Free memory was 122.3 MB in the beginning and 162.8 MB in the end (delta: -40.5 MB). Peak memory consumption was 108.4 MB. Max. memory is 8.0 GB. * Witness Printer took 83.88 ms. Allocated memory is still 320.9 MB. Free memory was 162.8 MB in the beginning and 158.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 620]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L552] struct TreeNode* root = malloc(sizeof(*root)), *n; [L553] root->left = ((void *)0) [L554] root->right = ((void *)0) [L555] COND FALSE !(__VERIFIER_nondet_int()) [L574] n = ((void *)0) [L575] struct TreeNode* pred; [L576] COND TRUE \read(*root) [L577] pred = ((void *)0) [L578] n = root [L579] EXPR n->left [L579] n->left || n->right [L579] EXPR n->right [L579] n->left || n->right [L579] COND FALSE !(n->left || n->right) [L586] COND FALSE !(\read(*pred)) [L592] root = ((void *)0) [L576] COND FALSE !(\read(*root)) [L595] List a = (List) malloc(sizeof(struct node)); [L596] COND FALSE !(a == 0) [L597] List t; [L598] List p = a; [L599] COND TRUE __VERIFIER_nondet_int() [L600] p->h = 1 [L601] t = (List) malloc(sizeof(struct node)) [L602] COND FALSE !(t == 0) [L603] p->n = t [L604] EXPR p->n [L604] p = p->n [L599] COND FALSE !(__VERIFIER_nondet_int()) [L606] COND TRUE __VERIFIER_nondet_int() [L607] p->h = 2 [L608] t = (List) malloc(sizeof(struct node)) [L609] COND FALSE !(t == 0) [L610] p->n = t [L611] EXPR p->n [L611] p = p->n [L606] COND FALSE !(__VERIFIER_nondet_int()) [L613] p->h = 3 [L614] p = a [L615] EXPR p->h [L615] COND FALSE !(p->h == 2) [L617] EXPR p->h [L617] COND TRUE p->h == 1 [L618] EXPR p->n [L618] p = p->n [L617] EXPR p->h [L617] COND FALSE !(p->h == 1) [L619] EXPR p->h [L619] COND TRUE p->h != 3 [L620] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 69.5s, OverallIterations: 16, TraceHistogramMax: 3, AutomataDifference: 54.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 823 SDtfs, 839 SDslu, 4447 SDs, 0 SdLazy, 2810 SolverSat, 348 SolverUnsat, 11 SolverUnknown, 0 SolverNotchecked, 25.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 513 GetRequests, 255 SyntacticMatches, 14 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 35.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 201 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 10.8s InterpolantComputationTime, 804 NumberOfCodeBlocks, 804 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 743 ConstructedInterpolants, 39 QuantifiedInterpolants, 229413 SizeOfPredicates, 118 NumberOfNonLiveVariables, 1519 ConjunctsInSsa, 356 ConjunctsInUnsatCore, 24 InterpolantComputations, 6 PerfectInterpolantSequences, 42/134 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...