/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/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:59:36,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:59:36,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:59:36,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:59:36,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:59:36,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:59:36,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:59:36,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:59:36,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:59:36,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:59:36,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:59:36,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:59:36,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:59:36,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:59:36,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:59:36,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:59:36,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:59:36,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:59:36,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:59:36,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:59:36,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:59:36,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:59:36,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:59:36,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:59:36,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:59:36,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:59:36,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:59:36,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:59:36,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:59:36,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:59:36,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:59:36,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:59:36,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:59:36,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:59:36,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:59:36,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:59:36,530 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:59:36,558 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:59:36,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:59:36,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:59:36,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:59:36,561 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:59:36,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:59:36,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:59:36,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:59:36,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:59:36,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:59:36,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:59:36,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:59:36,564 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:59:36,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:59:36,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:59:36,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:59:36,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:59:36,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:59:36,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:59:36,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:59:36,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:59:36,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:59:36,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:59:36,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:59:36,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:59:36,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:59:37,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:59:37,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:59:37,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:59:37,067 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:59:37,068 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:59:37,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:59:37,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40b0a2d61/03b34d7f9611484490a7d667bcd7a4f6/FLAG758b6094f [2020-12-22 09:59:38,219 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:59:38,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:59:38,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40b0a2d61/03b34d7f9611484490a7d667bcd7a4f6/FLAG758b6094f [2020-12-22 09:59:38,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40b0a2d61/03b34d7f9611484490a7d667bcd7a4f6 [2020-12-22 09:59:38,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:59:38,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:59:38,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:59:38,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:59:38,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:59:38,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:59:38" (1/1) ... [2020-12-22 09:59:38,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b84b9a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:38, skipping insertion in model container [2020-12-22 09:59:38,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:59:38" (1/1) ... [2020-12-22 09:59:38,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:59:38,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:59:39,213 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/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[11832,11845] [2020-12-22 09:59:39,285 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/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[18650,18663] [2020-12-22 09:59:40,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:59:40,418 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:59:40,486 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/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[11832,11845] [2020-12-22 09:59:40,511 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/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[18650,18663] [2020-12-22 09:59:41,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:59:41,148 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:59:41,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:41 WrapperNode [2020-12-22 09:59:41,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:59:41,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:59:41,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:59:41,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:59:41,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:41" (1/1) ... [2020-12-22 09:59:41,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:41" (1/1) ... [2020-12-22 09:59:41,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:59:41,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:59:41,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:59:41,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:59:41,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:41" (1/1) ... [2020-12-22 09:59:41,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:41" (1/1) ... [2020-12-22 09:59:41,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:41" (1/1) ... [2020-12-22 09:59:41,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:41" (1/1) ... [2020-12-22 09:59:42,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:41" (1/1) ... [2020-12-22 09:59:42,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:41" (1/1) ... [2020-12-22 09:59:42,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:41" (1/1) ... [2020-12-22 09:59:42,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:59:42,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:59:42,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:59:42,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:59:42,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:41" (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 09:59:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:59:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:59:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:59:42,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:59:48,426 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:59:48,427 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:59:48,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:59:48 BoogieIcfgContainer [2020-12-22 09:59:48,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:59:48,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:59:48,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:59:48,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:59:48,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:59:38" (1/3) ... [2020-12-22 09:59:48,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe0cf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:59:48, skipping insertion in model container [2020-12-22 09:59:48,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:41" (2/3) ... [2020-12-22 09:59:48,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe0cf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:59:48, skipping insertion in model container [2020-12-22 09:59:48,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:59:48" (3/3) ... [2020-12-22 09:59:48,447 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:59:48,457 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:59:48,465 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:59:48,484 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:59:48,535 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:59:48,536 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:59:48,536 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:59:48,536 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:59:48,536 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:59:48,536 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:59:48,536 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:59:48,537 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:59:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states. [2020-12-22 09:59:48,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:59:48,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:48,586 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:48,586 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:48,593 INFO L82 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2020-12-22 09:59:48,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:48,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627118740] [2020-12-22 09:59:48,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:48,880 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 09:59:48,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627118740] [2020-12-22 09:59:48,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:48,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:59:48,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645868523] [2020-12-22 09:59:48,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:59:48,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:48,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:59:48,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:59:48,905 INFO L87 Difference]: Start difference. First operand 908 states. Second operand 2 states. [2020-12-22 09:59:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:49,000 INFO L93 Difference]: Finished difference Result 1777 states and 3370 transitions. [2020-12-22 09:59:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:59:49,002 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:59:49,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:49,028 INFO L225 Difference]: With dead ends: 1777 [2020-12-22 09:59:49,029 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:59:49,038 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 09:59:49,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:59:49,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2020-12-22 09:59:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 09:59:49,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1588 transitions. [2020-12-22 09:59:49,159 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1588 transitions. Word has length 34 [2020-12-22 09:59:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:49,159 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1588 transitions. [2020-12-22 09:59:49,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:59:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1588 transitions. [2020-12-22 09:59:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:59:49,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:49,162 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:49,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:59:49,163 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:59:49,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:49,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538869955] [2020-12-22 09:59:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:49,378 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 09:59:49,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538869955] [2020-12-22 09:59:49,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:49,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:49,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126163663] [2020-12-22 09:59:49,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:59:49,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:49,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:59:49,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:59:49,386 INFO L87 Difference]: Start difference. First operand 842 states and 1588 transitions. Second operand 5 states. [2020-12-22 09:59:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:49,609 INFO L93 Difference]: Finished difference Result 897 states and 1673 transitions. [2020-12-22 09:59:49,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:59:49,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:59:49,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:49,621 INFO L225 Difference]: With dead ends: 897 [2020-12-22 09:59:49,622 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:59:49,625 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 09:59:49,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:59:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2020-12-22 09:59:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 09:59:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1557 transitions. [2020-12-22 09:59:49,676 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1557 transitions. Word has length 34 [2020-12-22 09:59:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:49,676 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1557 transitions. [2020-12-22 09:59:49,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:59:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1557 transitions. [2020-12-22 09:59:49,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 09:59:49,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:49,683 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, 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, 1, 1, 1] [2020-12-22 09:59:49,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:59:49,683 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:49,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:49,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1371902204, now seen corresponding path program 1 times [2020-12-22 09:59:49,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:49,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980471971] [2020-12-22 09:59:49,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:49,922 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 09:59:49,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980471971] [2020-12-22 09:59:49,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:49,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:59:49,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949608125] [2020-12-22 09:59:49,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:49,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:49,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:49,932 INFO L87 Difference]: Start difference. First operand 842 states and 1557 transitions. Second operand 3 states. [2020-12-22 09:59:56,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:56,028 INFO L93 Difference]: Finished difference Result 2346 states and 4430 transitions. [2020-12-22 09:59:56,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:56,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 09:59:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:56,040 INFO L225 Difference]: With dead ends: 2346 [2020-12-22 09:59:56,040 INFO L226 Difference]: Without dead ends: 1593 [2020-12-22 09:59:56,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 09:59:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2020-12-22 09:59:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1593. [2020-12-22 09:59:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1593 states. [2020-12-22 09:59:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2932 transitions. [2020-12-22 09:59:56,097 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2932 transitions. Word has length 61 [2020-12-22 09:59:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:56,097 INFO L481 AbstractCegarLoop]: Abstraction has 1593 states and 2932 transitions. [2020-12-22 09:59:56,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2932 transitions. [2020-12-22 09:59:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:56,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:56,100 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, 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:56,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:59:56,100 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:56,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:56,101 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:59:56,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:56,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544480642] [2020-12-22 09:59:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:56,200 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 09:59:56,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544480642] [2020-12-22 09:59:56,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:56,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:56,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108465174] [2020-12-22 09:59:56,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:56,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:56,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:56,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:56,206 INFO L87 Difference]: Start difference. First operand 1593 states and 2932 transitions. Second operand 3 states. [2020-12-22 09:59:56,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:56,247 INFO L93 Difference]: Finished difference Result 1689 states and 3084 transitions. [2020-12-22 09:59:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:56,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:56,259 INFO L225 Difference]: With dead ends: 1689 [2020-12-22 09:59:56,259 INFO L226 Difference]: Without dead ends: 1638 [2020-12-22 09:59:56,260 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 09:59:56,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2020-12-22 09:59:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1636. [2020-12-22 09:59:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-12-22 09:59:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 3001 transitions. [2020-12-22 09:59:56,307 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 3001 transitions. Word has length 64 [2020-12-22 09:59:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:56,309 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 3001 transitions. [2020-12-22 09:59:56,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:56,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 3001 transitions. [2020-12-22 09:59:56,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:56,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:56,312 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, 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:56,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:59:56,312 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:56,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:56,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:59:56,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:56,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123768447] [2020-12-22 09:59:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:56,406 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 09:59:56,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123768447] [2020-12-22 09:59:56,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:56,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:56,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682284241] [2020-12-22 09:59:56,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:56,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:56,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:56,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:56,410 INFO L87 Difference]: Start difference. First operand 1636 states and 3001 transitions. Second operand 3 states. [2020-12-22 09:59:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:56,449 INFO L93 Difference]: Finished difference Result 1812 states and 3281 transitions. [2020-12-22 09:59:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:56,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:56,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:56,460 INFO L225 Difference]: With dead ends: 1812 [2020-12-22 09:59:56,460 INFO L226 Difference]: Without dead ends: 1718 [2020-12-22 09:59:56,461 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 09:59:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-12-22 09:59:56,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1716. [2020-12-22 09:59:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2020-12-22 09:59:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 3128 transitions. [2020-12-22 09:59:56,511 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 3128 transitions. Word has length 64 [2020-12-22 09:59:56,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:56,512 INFO L481 AbstractCegarLoop]: Abstraction has 1716 states and 3128 transitions. [2020-12-22 09:59:56,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:56,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 3128 transitions. [2020-12-22 09:59:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:56,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:56,513 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, 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:56,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:59:56,514 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:56,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:56,515 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:59:56,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:56,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267125751] [2020-12-22 09:59:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:56,579 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 09:59:56,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267125751] [2020-12-22 09:59:56,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:56,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:56,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172041419] [2020-12-22 09:59:56,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:56,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:56,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:56,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:56,583 INFO L87 Difference]: Start difference. First operand 1716 states and 3128 transitions. Second operand 3 states. [2020-12-22 09:59:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:56,628 INFO L93 Difference]: Finished difference Result 2040 states and 3642 transitions. [2020-12-22 09:59:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:56,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:56,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:56,641 INFO L225 Difference]: With dead ends: 2040 [2020-12-22 09:59:56,642 INFO L226 Difference]: Without dead ends: 1866 [2020-12-22 09:59:56,643 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 09:59:56,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2020-12-22 09:59:56,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1864. [2020-12-22 09:59:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1864 states. [2020-12-22 09:59:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 3360 transitions. [2020-12-22 09:59:56,708 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 3360 transitions. Word has length 64 [2020-12-22 09:59:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:56,708 INFO L481 AbstractCegarLoop]: Abstraction has 1864 states and 3360 transitions. [2020-12-22 09:59:56,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 3360 transitions. [2020-12-22 09:59:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:56,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:56,710 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, 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:56,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:59:56,711 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:56,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:56,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:59:56,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:56,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953724952] [2020-12-22 09:59:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:56,845 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 09:59:56,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953724952] [2020-12-22 09:59:56,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:56,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:56,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836660178] [2020-12-22 09:59:56,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:56,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:56,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:56,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:56,850 INFO L87 Difference]: Start difference. First operand 1864 states and 3360 transitions. Second operand 3 states. [2020-12-22 09:59:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:56,920 INFO L93 Difference]: Finished difference Result 2460 states and 4298 transitions. [2020-12-22 09:59:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:56,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:56,938 INFO L225 Difference]: With dead ends: 2460 [2020-12-22 09:59:56,938 INFO L226 Difference]: Without dead ends: 2138 [2020-12-22 09:59:56,941 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 09:59:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2020-12-22 09:59:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 2136. [2020-12-22 09:59:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2136 states. [2020-12-22 09:59:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 3780 transitions. [2020-12-22 09:59:57,033 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 3780 transitions. Word has length 64 [2020-12-22 09:59:57,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:57,033 INFO L481 AbstractCegarLoop]: Abstraction has 2136 states and 3780 transitions. [2020-12-22 09:59:57,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 3780 transitions. [2020-12-22 09:59:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:57,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:57,035 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, 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:57,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:59:57,035 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:57,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:59:57,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:57,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682314866] [2020-12-22 09:59:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:57,144 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 09:59:57,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682314866] [2020-12-22 09:59:57,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:57,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:57,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734427508] [2020-12-22 09:59:57,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:57,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:57,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:57,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:57,148 INFO L87 Difference]: Start difference. First operand 2136 states and 3780 transitions. Second operand 3 states. [2020-12-22 09:59:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:57,219 INFO L93 Difference]: Finished difference Result 3228 states and 5478 transitions. [2020-12-22 09:59:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:57,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:57,235 INFO L225 Difference]: With dead ends: 3228 [2020-12-22 09:59:57,235 INFO L226 Difference]: Without dead ends: 2634 [2020-12-22 09:59:57,238 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 09:59:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2020-12-22 09:59:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2632. [2020-12-22 09:59:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2632 states. [2020-12-22 09:59:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 4532 transitions. [2020-12-22 09:59:57,339 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 4532 transitions. Word has length 64 [2020-12-22 09:59:57,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:57,340 INFO L481 AbstractCegarLoop]: Abstraction has 2632 states and 4532 transitions. [2020-12-22 09:59:57,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 4532 transitions. [2020-12-22 09:59:57,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:57,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:57,341 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, 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:57,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:59:57,342 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:57,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:57,342 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:59:57,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:57,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624002957] [2020-12-22 09:59:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:57,473 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 09:59:57,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624002957] [2020-12-22 09:59:57,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:57,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:57,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057105009] [2020-12-22 09:59:57,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:57,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:57,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:57,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:57,478 INFO L87 Difference]: Start difference. First operand 2632 states and 4532 transitions. Second operand 7 states. [2020-12-22 09:59:58,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:58,098 INFO L93 Difference]: Finished difference Result 13532 states and 21342 transitions. [2020-12-22 09:59:58,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:59:58,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:59:58,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:58,164 INFO L225 Difference]: With dead ends: 13532 [2020-12-22 09:59:58,164 INFO L226 Difference]: Without dead ends: 12442 [2020-12-22 09:59:58,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:59:58,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12442 states. [2020-12-22 09:59:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12442 to 3720. [2020-12-22 09:59:58,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-12-22 09:59:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 6148 transitions. [2020-12-22 09:59:58,558 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 6148 transitions. Word has length 64 [2020-12-22 09:59:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:58,558 INFO L481 AbstractCegarLoop]: Abstraction has 3720 states and 6148 transitions. [2020-12-22 09:59:58,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 6148 transitions. [2020-12-22 09:59:58,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:59:58,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:58,562 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:58,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:59:58,562 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:58,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:58,563 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:59:58,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:58,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778278776] [2020-12-22 09:59:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:58,629 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 09:59:58,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778278776] [2020-12-22 09:59:58,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:58,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:58,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601793952] [2020-12-22 09:59:58,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:58,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:58,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:58,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:58,634 INFO L87 Difference]: Start difference. First operand 3720 states and 6148 transitions. Second operand 3 states. [2020-12-22 09:59:58,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:58,817 INFO L93 Difference]: Finished difference Result 6910 states and 10968 transitions. [2020-12-22 09:59:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:58,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:59:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:58,829 INFO L225 Difference]: With dead ends: 6910 [2020-12-22 09:59:58,829 INFO L226 Difference]: Without dead ends: 4732 [2020-12-22 09:59:58,834 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 09:59:58,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2020-12-22 09:59:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 4730. [2020-12-22 09:59:59,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4730 states. [2020-12-22 09:59:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 7622 transitions. [2020-12-22 09:59:59,071 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 7622 transitions. Word has length 66 [2020-12-22 09:59:59,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:59,072 INFO L481 AbstractCegarLoop]: Abstraction has 4730 states and 7622 transitions. [2020-12-22 09:59:59,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 7622 transitions. [2020-12-22 09:59:59,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:59:59,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:59,077 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:59,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:59:59,078 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:59,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:59,078 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:59:59,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:59,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956027608] [2020-12-22 09:59:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:59,307 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 09:59:59,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956027608] [2020-12-22 09:59:59,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:59,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:59,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498861052] [2020-12-22 09:59:59,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:59,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:59,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:59,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:59,311 INFO L87 Difference]: Start difference. First operand 4730 states and 7622 transitions. Second operand 7 states. [2020-12-22 09:59:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:59,695 INFO L93 Difference]: Finished difference Result 7918 states and 12392 transitions. [2020-12-22 09:59:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:59,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:59:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:59,706 INFO L225 Difference]: With dead ends: 7918 [2020-12-22 09:59:59,707 INFO L226 Difference]: Without dead ends: 4732 [2020-12-22 09:59:59,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:59:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2020-12-22 09:59:59,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 4730. [2020-12-22 09:59:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4730 states. [2020-12-22 09:59:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 7574 transitions. [2020-12-22 09:59:59,926 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 7574 transitions. Word has length 66 [2020-12-22 09:59:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:59,927 INFO L481 AbstractCegarLoop]: Abstraction has 4730 states and 7574 transitions. [2020-12-22 09:59:59,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 7574 transitions. [2020-12-22 09:59:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:59:59,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:59,928 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:59,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:59:59,928 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:59,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:59,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:59:59,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:59,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307658874] [2020-12-22 09:59:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:00,021 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 10:00:00,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307658874] [2020-12-22 10:00:00,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:00,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:00,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833347355] [2020-12-22 10:00:00,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:00:00,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:00,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:00:00,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:00:00,025 INFO L87 Difference]: Start difference. First operand 4730 states and 7574 transitions. Second operand 6 states. [2020-12-22 10:00:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:00,335 INFO L93 Difference]: Finished difference Result 7916 states and 12295 transitions. [2020-12-22 10:00:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:00:00,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 10:00:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:00,346 INFO L225 Difference]: With dead ends: 7916 [2020-12-22 10:00:00,346 INFO L226 Difference]: Without dead ends: 4730 [2020-12-22 10:00:00,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:00:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2020-12-22 10:00:00,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 4730. [2020-12-22 10:00:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4730 states. [2020-12-22 10:00:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 7526 transitions. [2020-12-22 10:00:00,570 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 7526 transitions. Word has length 67 [2020-12-22 10:00:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:00,570 INFO L481 AbstractCegarLoop]: Abstraction has 4730 states and 7526 transitions. [2020-12-22 10:00:00,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:00:00,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 7526 transitions. [2020-12-22 10:00:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:00:00,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:00,572 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:00,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:00:00,572 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:00,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 10:00:00,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:00,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457445117] [2020-12-22 10:00:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:00,649 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 10:00:00,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457445117] [2020-12-22 10:00:00,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:00,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:00,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844290437] [2020-12-22 10:00:00,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:00:00,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:00,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:00:00,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:00:00,652 INFO L87 Difference]: Start difference. First operand 4730 states and 7526 transitions. Second operand 6 states. [2020-12-22 10:00:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:01,071 INFO L93 Difference]: Finished difference Result 7916 states and 12199 transitions. [2020-12-22 10:00:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:00:01,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 10:00:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:01,082 INFO L225 Difference]: With dead ends: 7916 [2020-12-22 10:00:01,082 INFO L226 Difference]: Without dead ends: 4730 [2020-12-22 10:00:01,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:00:01,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2020-12-22 10:00:01,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 4730. [2020-12-22 10:00:01,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4730 states. [2020-12-22 10:00:01,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 7478 transitions. [2020-12-22 10:00:01,322 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 7478 transitions. Word has length 67 [2020-12-22 10:00:01,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:01,322 INFO L481 AbstractCegarLoop]: Abstraction has 4730 states and 7478 transitions. [2020-12-22 10:00:01,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:00:01,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 7478 transitions. [2020-12-22 10:00:01,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:00:01,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:01,323 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:01,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:00:01,324 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:01,324 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 10:00:01,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:01,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972147682] [2020-12-22 10:00:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:01,401 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 10:00:01,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972147682] [2020-12-22 10:00:01,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:01,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:01,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742556194] [2020-12-22 10:00:01,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:00:01,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:01,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:00:01,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:00:01,403 INFO L87 Difference]: Start difference. First operand 4730 states and 7478 transitions. Second operand 5 states. [2020-12-22 10:00:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:01,860 INFO L93 Difference]: Finished difference Result 7509 states and 11388 transitions. [2020-12-22 10:00:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:01,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 10:00:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:01,876 INFO L225 Difference]: With dead ends: 7509 [2020-12-22 10:00:01,876 INFO L226 Difference]: Without dead ends: 7507 [2020-12-22 10:00:01,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:00:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7507 states. [2020-12-22 10:00:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7507 to 4922. [2020-12-22 10:00:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4922 states. [2020-12-22 10:00:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4922 states to 4922 states and 7654 transitions. [2020-12-22 10:00:02,194 INFO L78 Accepts]: Start accepts. Automaton has 4922 states and 7654 transitions. Word has length 67 [2020-12-22 10:00:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:02,194 INFO L481 AbstractCegarLoop]: Abstraction has 4922 states and 7654 transitions. [2020-12-22 10:00:02,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:00:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4922 states and 7654 transitions. [2020-12-22 10:00:02,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:02,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:02,198 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:02,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:00:02,199 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:02,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:02,199 INFO L82 PathProgramCache]: Analyzing trace with hash -119875554, now seen corresponding path program 1 times [2020-12-22 10:00:02,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:02,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468494527] [2020-12-22 10:00:02,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:00:02,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468494527] [2020-12-22 10:00:02,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:02,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:02,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782295151] [2020-12-22 10:00:02,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:02,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:02,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:02,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:02,312 INFO L87 Difference]: Start difference. First operand 4922 states and 7654 transitions. Second operand 7 states. [2020-12-22 10:00:03,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:03,492 INFO L93 Difference]: Finished difference Result 22502 states and 32588 transitions. [2020-12-22 10:00:03,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:03,493 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:03,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:03,535 INFO L225 Difference]: With dead ends: 22502 [2020-12-22 10:00:03,535 INFO L226 Difference]: Without dead ends: 19124 [2020-12-22 10:00:03,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19124 states. [2020-12-22 10:00:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19124 to 8298. [2020-12-22 10:00:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8298 states. [2020-12-22 10:00:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8298 states to 8298 states and 12406 transitions. [2020-12-22 10:00:04,270 INFO L78 Accepts]: Start accepts. Automaton has 8298 states and 12406 transitions. Word has length 94 [2020-12-22 10:00:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:04,270 INFO L481 AbstractCegarLoop]: Abstraction has 8298 states and 12406 transitions. [2020-12-22 10:00:04,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:04,271 INFO L276 IsEmpty]: Start isEmpty. Operand 8298 states and 12406 transitions. [2020-12-22 10:00:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:04,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:04,276 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:04,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:00:04,276 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:04,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1888658370, now seen corresponding path program 1 times [2020-12-22 10:00:04,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:04,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206513063] [2020-12-22 10:00:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:00:04,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206513063] [2020-12-22 10:00:04,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:04,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:04,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745507480] [2020-12-22 10:00:04,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:04,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:04,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:04,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:04,408 INFO L87 Difference]: Start difference. First operand 8298 states and 12406 transitions. Second operand 7 states. [2020-12-22 10:00:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:05,667 INFO L93 Difference]: Finished difference Result 25878 states and 37340 transitions. [2020-12-22 10:00:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:05,667 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:05,711 INFO L225 Difference]: With dead ends: 25878 [2020-12-22 10:00:05,711 INFO L226 Difference]: Without dead ends: 22500 [2020-12-22 10:00:05,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:05,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22500 states. [2020-12-22 10:00:06,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22500 to 13370. [2020-12-22 10:00:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13370 states. [2020-12-22 10:00:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13370 states to 13370 states and 19494 transitions. [2020-12-22 10:00:06,642 INFO L78 Accepts]: Start accepts. Automaton has 13370 states and 19494 transitions. Word has length 94 [2020-12-22 10:00:06,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:06,642 INFO L481 AbstractCegarLoop]: Abstraction has 13370 states and 19494 transitions. [2020-12-22 10:00:06,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 13370 states and 19494 transitions. [2020-12-22 10:00:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:06,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:06,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:06,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:00:06,648 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:06,649 INFO L82 PathProgramCache]: Analyzing trace with hash -757018530, now seen corresponding path program 1 times [2020-12-22 10:00:06,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:06,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858327799] [2020-12-22 10:00:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:00:06,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858327799] [2020-12-22 10:00:06,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:06,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:06,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378690116] [2020-12-22 10:00:06,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:06,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:06,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:06,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:06,764 INFO L87 Difference]: Start difference. First operand 13370 states and 19494 transitions. Second operand 7 states. [2020-12-22 10:00:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:08,088 INFO L93 Difference]: Finished difference Result 29254 states and 42092 transitions. [2020-12-22 10:00:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:08,088 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:08,142 INFO L225 Difference]: With dead ends: 29254 [2020-12-22 10:00:08,143 INFO L226 Difference]: Without dead ends: 25876 [2020-12-22 10:00:08,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:08,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25876 states. [2020-12-22 10:00:09,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25876 to 16746. [2020-12-22 10:00:09,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16746 states. [2020-12-22 10:00:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16746 states to 16746 states and 24246 transitions. [2020-12-22 10:00:09,448 INFO L78 Accepts]: Start accepts. Automaton has 16746 states and 24246 transitions. Word has length 94 [2020-12-22 10:00:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:09,448 INFO L481 AbstractCegarLoop]: Abstraction has 16746 states and 24246 transitions. [2020-12-22 10:00:09,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 16746 states and 24246 transitions. [2020-12-22 10:00:09,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:09,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:09,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:09,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:00:09,455 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:09,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:09,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1992477570, now seen corresponding path program 1 times [2020-12-22 10:00:09,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:09,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972814475] [2020-12-22 10:00:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:00:09,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972814475] [2020-12-22 10:00:09,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:09,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:09,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402187100] [2020-12-22 10:00:09,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:09,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:09,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:09,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:09,566 INFO L87 Difference]: Start difference. First operand 16746 states and 24246 transitions. Second operand 7 states. [2020-12-22 10:00:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:11,313 INFO L93 Difference]: Finished difference Result 32630 states and 46844 transitions. [2020-12-22 10:00:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:11,313 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:11,367 INFO L225 Difference]: With dead ends: 32630 [2020-12-22 10:00:11,367 INFO L226 Difference]: Without dead ends: 29252 [2020-12-22 10:00:11,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:11,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29252 states. [2020-12-22 10:00:12,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29252 to 20122. [2020-12-22 10:00:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20122 states. [2020-12-22 10:00:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20122 states to 20122 states and 28998 transitions. [2020-12-22 10:00:12,617 INFO L78 Accepts]: Start accepts. Automaton has 20122 states and 28998 transitions. Word has length 94 [2020-12-22 10:00:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:12,617 INFO L481 AbstractCegarLoop]: Abstraction has 20122 states and 28998 transitions. [2020-12-22 10:00:12,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:12,618 INFO L276 IsEmpty]: Start isEmpty. Operand 20122 states and 28998 transitions. [2020-12-22 10:00:12,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:12,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:12,625 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:12,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:00:12,625 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:12,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:12,626 INFO L82 PathProgramCache]: Analyzing trace with hash 881494174, now seen corresponding path program 1 times [2020-12-22 10:00:12,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:12,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795047847] [2020-12-22 10:00:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:00:12,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795047847] [2020-12-22 10:00:12,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:12,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:12,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295071326] [2020-12-22 10:00:12,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:12,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:12,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:12,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:12,733 INFO L87 Difference]: Start difference. First operand 20122 states and 28998 transitions. Second operand 7 states. [2020-12-22 10:00:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:14,811 INFO L93 Difference]: Finished difference Result 33990 states and 48780 transitions. [2020-12-22 10:00:14,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:14,812 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:14,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:14,842 INFO L225 Difference]: With dead ends: 33990 [2020-12-22 10:00:14,842 INFO L226 Difference]: Without dead ends: 31620 [2020-12-22 10:00:14,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31620 states. [2020-12-22 10:00:16,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31620 to 22490. [2020-12-22 10:00:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22490 states. [2020-12-22 10:00:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22490 states to 22490 states and 32358 transitions. [2020-12-22 10:00:16,415 INFO L78 Accepts]: Start accepts. Automaton has 22490 states and 32358 transitions. Word has length 94 [2020-12-22 10:00:16,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:16,416 INFO L481 AbstractCegarLoop]: Abstraction has 22490 states and 32358 transitions. [2020-12-22 10:00:16,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 22490 states and 32358 transitions. [2020-12-22 10:00:16,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:00:16,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:16,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:16,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:00:16,425 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:16,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2121264847, now seen corresponding path program 1 times [2020-12-22 10:00:16,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:16,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125432975] [2020-12-22 10:00:16,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:16,757 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-12-22 10:00:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:16,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125432975] [2020-12-22 10:00:16,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226021227] [2020-12-22 10:00:16,919 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 10:00:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:17,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:00:17,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:00:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:00:17,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:00:17,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 10:00:17,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989030299] [2020-12-22 10:00:17,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:00:17,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:17,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:00:17,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:00:17,649 INFO L87 Difference]: Start difference. First operand 22490 states and 32358 transitions. Second operand 16 states. [2020-12-22 10:00:31,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:31,157 INFO L93 Difference]: Finished difference Result 135089 states and 189157 transitions. [2020-12-22 10:00:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 10:00:31,158 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 95 [2020-12-22 10:00:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:31,438 INFO L225 Difference]: With dead ends: 135089 [2020-12-22 10:00:31,438 INFO L226 Difference]: Without dead ends: 114143 [2020-12-22 10:00:31,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2295 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1223, Invalid=5419, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 10:00:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114143 states. [2020-12-22 10:00:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114143 to 71746. [2020-12-22 10:00:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71746 states. [2020-12-22 10:00:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71746 states to 71746 states and 100342 transitions. [2020-12-22 10:00:38,949 INFO L78 Accepts]: Start accepts. Automaton has 71746 states and 100342 transitions. Word has length 95 [2020-12-22 10:00:38,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:38,949 INFO L481 AbstractCegarLoop]: Abstraction has 71746 states and 100342 transitions. [2020-12-22 10:00:38,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:00:38,949 INFO L276 IsEmpty]: Start isEmpty. Operand 71746 states and 100342 transitions. [2020-12-22 10:00:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 10:00:38,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:38,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:39,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:00:39,173 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:39,175 INFO L82 PathProgramCache]: Analyzing trace with hash 421270486, now seen corresponding path program 1 times [2020-12-22 10:00:39,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:39,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639799093] [2020-12-22 10:00:39,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:39,606 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-12-22 10:00:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:39,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639799093] [2020-12-22 10:00:39,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445491739] [2020-12-22 10:00:39,712 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 10:00:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:39,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:00:39,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:00:40,091 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:00:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:40,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:00:40,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-12-22 10:00:40,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649879703] [2020-12-22 10:00:40,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:00:40,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:40,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:00:40,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:00:40,314 INFO L87 Difference]: Start difference. First operand 71746 states and 100342 transitions. Second operand 21 states. [2020-12-22 10:00:40,825 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 10:00:41,614 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:41,818 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:00:42,257 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 10:00:51,952 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:52,143 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:00:52,354 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:00:52,863 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:00:53,118 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 10:00:53,308 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-22 10:00:53,562 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:00:53,769 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:53,960 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:00:54,347 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:00:54,809 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:55,813 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 10:00:56,424 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:00:57,395 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 10:00:57,612 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:00:57,886 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 10:00:58,121 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 10:00:58,345 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:00:58,560 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:00:58,821 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 10:00:59,840 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 10:01:00,050 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:01:00,402 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:01:00,825 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:02:21,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:21,119 INFO L93 Difference]: Finished difference Result 974253 states and 1327875 transitions. [2020-12-22 10:02:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2020-12-22 10:02:21,120 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 10:02:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:23,103 INFO L225 Difference]: With dead ends: 974253 [2020-12-22 10:02:23,103 INFO L226 Difference]: Without dead ends: 904051 [2020-12-22 10:02:23,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45792 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=10942, Invalid=93710, Unknown=0, NotChecked=0, Total=104652 [2020-12-22 10:02:24,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904051 states. [2020-12-22 10:03:00,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904051 to 346462. [2020-12-22 10:03:00,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346462 states. [2020-12-22 10:03:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346462 states to 346462 states and 477262 transitions. [2020-12-22 10:03:01,519 INFO L78 Accepts]: Start accepts. Automaton has 346462 states and 477262 transitions. Word has length 96 [2020-12-22 10:03:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:01,519 INFO L481 AbstractCegarLoop]: Abstraction has 346462 states and 477262 transitions. [2020-12-22 10:03:01,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:03:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 346462 states and 477262 transitions. [2020-12-22 10:03:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 10:03:01,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:01,552 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:01,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:03:01,766 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:01,766 INFO L82 PathProgramCache]: Analyzing trace with hash 496443166, now seen corresponding path program 1 times [2020-12-22 10:03:01,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:01,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368529054] [2020-12-22 10:03:01,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:03:01,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368529054] [2020-12-22 10:03:01,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:01,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:01,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927741765] [2020-12-22 10:03:01,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:01,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:01,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:01,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:01,844 INFO L87 Difference]: Start difference. First operand 346462 states and 477262 transitions. Second operand 3 states.