/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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:41:07,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:41:07,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:41:07,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:41:07,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:41:07,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:41:07,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:41:07,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:41:07,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:41:07,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:41:07,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:41:07,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:41:07,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:41:07,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:41:07,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:41:07,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:41:07,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:41:07,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:41:07,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:41:07,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:41:07,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:41:07,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:41:07,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:41:07,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:41:07,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 09:41:07,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 09:41:07,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 09:41:07,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 09:41:07,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 09:41:07,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 09:41:07,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:41:07,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:41:07,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:41:07,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:41:07,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:41:07,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:41:07,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:41:07,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:41:07,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:41:07,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:41:07,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:41:07,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:41:07,806 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:41:07,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:41:07,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:41:07,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:41:07,811 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:41:07,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:41:07,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:41:07,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:41:07,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:41:07,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:41:07,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:41:07,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:41:07,814 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:41:07,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:41:07,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:41:07,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:41:07,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:41:07,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:41:07,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:41:07,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:41:07,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:41:07,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:41:07,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:41:07,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:41:07,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:41:07,816 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:41:08,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:41:08,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:41:08,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:41:08,325 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:41:08,326 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:41:08,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:41:08,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2143b9ac2/c6bdfbdebf2c4c28b2eacaea8870f3e0/FLAG4c75669d0 [2020-12-22 09:41:09,539 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:41:09,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:41:09,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2143b9ac2/c6bdfbdebf2c4c28b2eacaea8870f3e0/FLAG4c75669d0 [2020-12-22 09:41:09,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2143b9ac2/c6bdfbdebf2c4c28b2eacaea8870f3e0 [2020-12-22 09:41:09,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:41:09,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:41:09,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:09,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:41:09,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:41:09,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:09" (1/1) ... [2020-12-22 09:41:09,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10da3a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09, skipping insertion in model container [2020-12-22 09:41:09,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:09" (1/1) ... [2020-12-22 09:41:09,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:41:10,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:41:10,478 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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[6582,6595] [2020-12-22 09:41:10,575 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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[14087,14100] [2020-12-22 09:41:11,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:11,555 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:41:11,621 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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[6582,6595] [2020-12-22 09:41:11,644 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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[14087,14100] [2020-12-22 09:41:12,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:12,354 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:41:12,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12 WrapperNode [2020-12-22 09:41:12,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:12,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:12,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:41:12,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:41:12,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:12,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:12,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:12,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:41:12,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:41:12,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:41:12,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:12,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:12,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:12,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:13,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:13,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:13,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:13,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:41:13,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:41:13,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:41:13,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:41:13,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (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 09:41:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:41:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:41:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:41:13,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:41:19,326 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:41:19,327 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:41:19,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:19 BoogieIcfgContainer [2020-12-22 09:41:19,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:41:19,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:41:19,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:41:19,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:41:19,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:41:09" (1/3) ... [2020-12-22 09:41:19,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d060d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:19, skipping insertion in model container [2020-12-22 09:41:19,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (2/3) ... [2020-12-22 09:41:19,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d060d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:19, skipping insertion in model container [2020-12-22 09:41:19,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:19" (3/3) ... [2020-12-22 09:41:19,341 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:41:19,348 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:41:19,355 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:41:19,376 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:41:19,413 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:41:19,414 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:41:19,414 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:41:19,414 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:41:19,414 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:41:19,414 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:41:19,415 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:41:19,415 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:41:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states. [2020-12-22 09:41:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:41:19,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:19,470 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] [2020-12-22 09:41:19,471 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2020-12-22 09:41:19,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:19,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449829818] [2020-12-22 09:41:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:19,862 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 09:41:19,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449829818] [2020-12-22 09:41:19,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:19,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:41:19,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436320189] [2020-12-22 09:41:19,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:41:19,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:19,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:41:19,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:41:19,894 INFO L87 Difference]: Start difference. First operand 877 states. Second operand 2 states. [2020-12-22 09:41:20,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:20,011 INFO L93 Difference]: Finished difference Result 1730 states and 3288 transitions. [2020-12-22 09:41:20,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:41:20,013 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-12-22 09:41:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:20,072 INFO L225 Difference]: With dead ends: 1730 [2020-12-22 09:41:20,072 INFO L226 Difference]: Without dead ends: 811 [2020-12-22 09:41:20,083 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 09:41:20,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-12-22 09:41:20,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2020-12-22 09:41:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2020-12-22 09:41:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1532 transitions. [2020-12-22 09:41:20,196 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1532 transitions. Word has length 26 [2020-12-22 09:41:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:20,197 INFO L481 AbstractCegarLoop]: Abstraction has 811 states and 1532 transitions. [2020-12-22 09:41:20,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:41:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1532 transitions. [2020-12-22 09:41:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:41:20,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:20,200 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] [2020-12-22 09:41:20,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:41:20,201 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:20,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:20,202 INFO L82 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2020-12-22 09:41:20,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:20,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233064676] [2020-12-22 09:41:20,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:20,311 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 09:41:20,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233064676] [2020-12-22 09:41:20,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:20,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:20,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168646247] [2020-12-22 09:41:20,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:20,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:20,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:20,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:20,318 INFO L87 Difference]: Start difference. First operand 811 states and 1532 transitions. Second operand 5 states. [2020-12-22 09:41:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:20,572 INFO L93 Difference]: Finished difference Result 850 states and 1591 transitions. [2020-12-22 09:41:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:20,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:41:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:20,580 INFO L225 Difference]: With dead ends: 850 [2020-12-22 09:41:20,581 INFO L226 Difference]: Without dead ends: 811 [2020-12-22 09:41:20,582 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 09:41:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-12-22 09:41:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2020-12-22 09:41:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2020-12-22 09:41:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1516 transitions. [2020-12-22 09:41:20,685 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1516 transitions. Word has length 26 [2020-12-22 09:41:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:20,686 INFO L481 AbstractCegarLoop]: Abstraction has 811 states and 1516 transitions. [2020-12-22 09:41:20,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1516 transitions. [2020-12-22 09:41:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:41:20,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:20,690 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] [2020-12-22 09:41:20,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:41:20,691 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:20,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2020-12-22 09:41:20,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:20,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131932717] [2020-12-22 09:41:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:20,844 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 09:41:20,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131932717] [2020-12-22 09:41:20,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:20,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:20,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074788376] [2020-12-22 09:41:20,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:20,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:20,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:20,847 INFO L87 Difference]: Start difference. First operand 811 states and 1516 transitions. Second operand 3 states. [2020-12-22 09:41:20,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:20,889 INFO L93 Difference]: Finished difference Result 875 states and 1616 transitions. [2020-12-22 09:41:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:20,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:41:20,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:20,902 INFO L225 Difference]: With dead ends: 875 [2020-12-22 09:41:20,903 INFO L226 Difference]: Without dead ends: 840 [2020-12-22 09:41:20,905 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 09:41:20,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-12-22 09:41:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 838. [2020-12-22 09:41:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2020-12-22 09:41:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1559 transitions. [2020-12-22 09:41:20,951 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1559 transitions. Word has length 41 [2020-12-22 09:41:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:20,952 INFO L481 AbstractCegarLoop]: Abstraction has 838 states and 1559 transitions. [2020-12-22 09:41:20,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1559 transitions. [2020-12-22 09:41:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:41:20,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:20,958 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] [2020-12-22 09:41:20,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:41:20,959 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2020-12-22 09:41:20,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:20,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116236004] [2020-12-22 09:41:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:21,117 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 09:41:21,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116236004] [2020-12-22 09:41:21,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:21,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:21,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349419207] [2020-12-22 09:41:21,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:21,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:21,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:21,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:21,123 INFO L87 Difference]: Start difference. First operand 838 states and 1559 transitions. Second operand 5 states. [2020-12-22 09:41:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:21,319 INFO L93 Difference]: Finished difference Result 1210 states and 2147 transitions. [2020-12-22 09:41:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:41:21,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:41:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:21,328 INFO L225 Difference]: With dead ends: 1210 [2020-12-22 09:41:21,328 INFO L226 Difference]: Without dead ends: 1148 [2020-12-22 09:41:21,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:41:21,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2020-12-22 09:41:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 898. [2020-12-22 09:41:21,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 09:41:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1652 transitions. [2020-12-22 09:41:21,367 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1652 transitions. Word has length 41 [2020-12-22 09:41:21,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:21,367 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1652 transitions. [2020-12-22 09:41:21,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1652 transitions. [2020-12-22 09:41:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:21,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:21,369 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] [2020-12-22 09:41:21,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:41:21,370 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:21,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2020-12-22 09:41:21,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:21,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773560525] [2020-12-22 09:41:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:21,439 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 09:41:21,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773560525] [2020-12-22 09:41:21,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:21,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:21,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057449981] [2020-12-22 09:41:21,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:21,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:21,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:21,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:21,445 INFO L87 Difference]: Start difference. First operand 898 states and 1652 transitions. Second operand 3 states. [2020-12-22 09:41:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:21,496 INFO L93 Difference]: Finished difference Result 1079 states and 1933 transitions. [2020-12-22 09:41:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:21,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:41:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:21,503 INFO L225 Difference]: With dead ends: 1079 [2020-12-22 09:41:21,504 INFO L226 Difference]: Without dead ends: 957 [2020-12-22 09:41:21,505 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 09:41:21,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2020-12-22 09:41:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2020-12-22 09:41:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-12-22 09:41:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1738 transitions. [2020-12-22 09:41:21,534 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1738 transitions. Word has length 43 [2020-12-22 09:41:21,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:21,535 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 1738 transitions. [2020-12-22 09:41:21,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:21,535 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1738 transitions. [2020-12-22 09:41:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:21,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:21,536 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] [2020-12-22 09:41:21,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:41:21,537 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:21,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:21,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2020-12-22 09:41:21,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:21,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553236985] [2020-12-22 09:41:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:21,647 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 09:41:21,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553236985] [2020-12-22 09:41:21,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:21,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:21,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094927853] [2020-12-22 09:41:21,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:21,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:21,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:21,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:21,650 INFO L87 Difference]: Start difference. First operand 955 states and 1738 transitions. Second operand 5 states. [2020-12-22 09:41:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:21,766 INFO L93 Difference]: Finished difference Result 1134 states and 2014 transitions. [2020-12-22 09:41:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:21,767 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:41:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:21,773 INFO L225 Difference]: With dead ends: 1134 [2020-12-22 09:41:21,773 INFO L226 Difference]: Without dead ends: 957 [2020-12-22 09:41:21,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2020-12-22 09:41:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2020-12-22 09:41:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-12-22 09:41:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1735 transitions. [2020-12-22 09:41:21,802 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1735 transitions. Word has length 43 [2020-12-22 09:41:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:21,802 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 1735 transitions. [2020-12-22 09:41:21,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1735 transitions. [2020-12-22 09:41:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:21,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:21,803 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] [2020-12-22 09:41:21,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:41:21,804 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:21,805 INFO L82 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2020-12-22 09:41:21,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:21,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032755657] [2020-12-22 09:41:21,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:21,848 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 09:41:21,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032755657] [2020-12-22 09:41:21,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:21,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:21,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602985727] [2020-12-22 09:41:21,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:21,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:21,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:21,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:21,850 INFO L87 Difference]: Start difference. First operand 955 states and 1735 transitions. Second operand 3 states. [2020-12-22 09:41:21,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:21,899 INFO L93 Difference]: Finished difference Result 1273 states and 2219 transitions. [2020-12-22 09:41:21,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:21,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:41:21,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:21,906 INFO L225 Difference]: With dead ends: 1273 [2020-12-22 09:41:21,907 INFO L226 Difference]: Without dead ends: 1096 [2020-12-22 09:41:21,908 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 09:41:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2020-12-22 09:41:21,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1094. [2020-12-22 09:41:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2020-12-22 09:41:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1940 transitions. [2020-12-22 09:41:21,944 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1940 transitions. Word has length 43 [2020-12-22 09:41:21,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:21,945 INFO L481 AbstractCegarLoop]: Abstraction has 1094 states and 1940 transitions. [2020-12-22 09:41:21,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:21,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1940 transitions. [2020-12-22 09:41:21,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:21,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:21,946 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] [2020-12-22 09:41:21,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:41:21,946 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:21,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:21,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2020-12-22 09:41:21,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:21,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188459709] [2020-12-22 09:41:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:21,986 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 09:41:21,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188459709] [2020-12-22 09:41:21,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:21,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:21,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835385398] [2020-12-22 09:41:21,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:21,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:21,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:21,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:21,989 INFO L87 Difference]: Start difference. First operand 1094 states and 1940 transitions. Second operand 3 states. [2020-12-22 09:41:22,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:22,051 INFO L93 Difference]: Finished difference Result 1654 states and 2774 transitions. [2020-12-22 09:41:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:22,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:41:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:22,060 INFO L225 Difference]: With dead ends: 1654 [2020-12-22 09:41:22,060 INFO L226 Difference]: Without dead ends: 1338 [2020-12-22 09:41:22,062 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 09:41:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2020-12-22 09:41:22,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1336. [2020-12-22 09:41:22,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1336 states. [2020-12-22 09:41:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2284 transitions. [2020-12-22 09:41:22,113 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2284 transitions. Word has length 43 [2020-12-22 09:41:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:22,114 INFO L481 AbstractCegarLoop]: Abstraction has 1336 states and 2284 transitions. [2020-12-22 09:41:22,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:22,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2284 transitions. [2020-12-22 09:41:22,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:41:22,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:22,115 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] [2020-12-22 09:41:22,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:41:22,115 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:22,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2020-12-22 09:41:22,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:22,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625830586] [2020-12-22 09:41:22,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:22,265 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 09:41:22,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625830586] [2020-12-22 09:41:22,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:22,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:41:22,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488204904] [2020-12-22 09:41:22,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:41:22,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:22,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:41:22,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:41:22,272 INFO L87 Difference]: Start difference. First operand 1336 states and 2284 transitions. Second operand 8 states. [2020-12-22 09:41:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:22,561 INFO L93 Difference]: Finished difference Result 1843 states and 2996 transitions. [2020-12-22 09:41:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:41:22,562 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-22 09:41:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:22,574 INFO L225 Difference]: With dead ends: 1843 [2020-12-22 09:41:22,574 INFO L226 Difference]: Without dead ends: 1841 [2020-12-22 09:41:22,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:41:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2020-12-22 09:41:22,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1384. [2020-12-22 09:41:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2020-12-22 09:41:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2328 transitions. [2020-12-22 09:41:22,661 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2328 transitions. Word has length 44 [2020-12-22 09:41:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:22,662 INFO L481 AbstractCegarLoop]: Abstraction has 1384 states and 2328 transitions. [2020-12-22 09:41:22,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:41:22,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2328 transitions. [2020-12-22 09:41:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:22,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:22,664 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] [2020-12-22 09:41:22,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:41:22,664 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:22,665 INFO L82 PathProgramCache]: Analyzing trace with hash -638527781, now seen corresponding path program 1 times [2020-12-22 09:41:22,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:22,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294227711] [2020-12-22 09:41:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:41:22,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294227711] [2020-12-22 09:41:22,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:22,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:22,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625668768] [2020-12-22 09:41:22,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:22,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:22,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:22,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:22,783 INFO L87 Difference]: Start difference. First operand 1384 states and 2328 transitions. Second operand 5 states. [2020-12-22 09:41:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:23,078 INFO L93 Difference]: Finished difference Result 3336 states and 5100 transitions. [2020-12-22 09:41:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:23,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:23,095 INFO L225 Difference]: With dead ends: 3336 [2020-12-22 09:41:23,095 INFO L226 Difference]: Without dead ends: 2730 [2020-12-22 09:41:23,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2020-12-22 09:41:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 1988. [2020-12-22 09:41:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1988 states. [2020-12-22 09:41:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3180 transitions. [2020-12-22 09:41:23,239 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3180 transitions. Word has length 63 [2020-12-22 09:41:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:23,239 INFO L481 AbstractCegarLoop]: Abstraction has 1988 states and 3180 transitions. [2020-12-22 09:41:23,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3180 transitions. [2020-12-22 09:41:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:23,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:23,242 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] [2020-12-22 09:41:23,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:41:23,242 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:23,243 INFO L82 PathProgramCache]: Analyzing trace with hash 608979835, now seen corresponding path program 1 times [2020-12-22 09:41:23,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:23,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999830202] [2020-12-22 09:41:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:41:23,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999830202] [2020-12-22 09:41:23,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:23,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:23,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548942394] [2020-12-22 09:41:23,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:23,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:23,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:23,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:23,325 INFO L87 Difference]: Start difference. First operand 1988 states and 3180 transitions. Second operand 5 states. [2020-12-22 09:41:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:23,638 INFO L93 Difference]: Finished difference Result 3940 states and 5952 transitions. [2020-12-22 09:41:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:23,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:23,659 INFO L225 Difference]: With dead ends: 3940 [2020-12-22 09:41:23,659 INFO L226 Difference]: Without dead ends: 3334 [2020-12-22 09:41:23,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2020-12-22 09:41:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2896. [2020-12-22 09:41:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2896 states. [2020-12-22 09:41:23,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4448 transitions. [2020-12-22 09:41:23,882 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4448 transitions. Word has length 63 [2020-12-22 09:41:23,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:23,883 INFO L481 AbstractCegarLoop]: Abstraction has 2896 states and 4448 transitions. [2020-12-22 09:41:23,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4448 transitions. [2020-12-22 09:41:23,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:23,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:23,885 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-12-22 09:41:23,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:41:23,885 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:23,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:23,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2078412817, now seen corresponding path program 1 times [2020-12-22 09:41:23,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:23,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379832842] [2020-12-22 09:41:23,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:23,990 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 09:41:23,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379832842] [2020-12-22 09:41:23,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:23,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:23,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191630902] [2020-12-22 09:41:23,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:23,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:23,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:23,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:23,992 INFO L87 Difference]: Start difference. First operand 2896 states and 4448 transitions. Second operand 5 states. [2020-12-22 09:41:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:24,335 INFO L93 Difference]: Finished difference Result 4200 states and 6324 transitions. [2020-12-22 09:41:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:24,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:24,357 INFO L225 Difference]: With dead ends: 4200 [2020-12-22 09:41:24,357 INFO L226 Difference]: Without dead ends: 3766 [2020-12-22 09:41:24,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2020-12-22 09:41:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 3328. [2020-12-22 09:41:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3328 states. [2020-12-22 09:41:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 5064 transitions. [2020-12-22 09:41:24,644 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 5064 transitions. Word has length 63 [2020-12-22 09:41:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:24,644 INFO L481 AbstractCegarLoop]: Abstraction has 3328 states and 5064 transitions. [2020-12-22 09:41:24,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 5064 transitions. [2020-12-22 09:41:24,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:41:24,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:24,647 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-12-22 09:41:24,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:41:24,647 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:24,648 INFO L82 PathProgramCache]: Analyzing trace with hash 47222752, now seen corresponding path program 1 times [2020-12-22 09:41:24,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:24,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54554167] [2020-12-22 09:41:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:24,707 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 09:41:24,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54554167] [2020-12-22 09:41:24,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:24,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:24,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625556355] [2020-12-22 09:41:24,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:24,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:24,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:24,715 INFO L87 Difference]: Start difference. First operand 3328 states and 5064 transitions. Second operand 3 states. [2020-12-22 09:41:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:24,907 INFO L93 Difference]: Finished difference Result 5880 states and 8666 transitions. [2020-12-22 09:41:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:24,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:41:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:24,926 INFO L225 Difference]: With dead ends: 5880 [2020-12-22 09:41:24,926 INFO L226 Difference]: Without dead ends: 3330 [2020-12-22 09:41:24,930 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 09:41:24,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2020-12-22 09:41:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 3328. [2020-12-22 09:41:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3328 states. [2020-12-22 09:41:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 5014 transitions. [2020-12-22 09:41:25,133 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 5014 transitions. Word has length 64 [2020-12-22 09:41:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:25,133 INFO L481 AbstractCegarLoop]: Abstraction has 3328 states and 5014 transitions. [2020-12-22 09:41:25,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:25,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 5014 transitions. [2020-12-22 09:41:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:41:25,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:25,135 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] [2020-12-22 09:41:25,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:41:25,135 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:25,136 INFO L82 PathProgramCache]: Analyzing trace with hash -39896042, now seen corresponding path program 1 times [2020-12-22 09:41:25,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:25,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523752951] [2020-12-22 09:41:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:25,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523752951] [2020-12-22 09:41:25,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:25,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:25,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326287307] [2020-12-22 09:41:25,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:25,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:25,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:25,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:25,186 INFO L87 Difference]: Start difference. First operand 3328 states and 5014 transitions. Second operand 3 states. [2020-12-22 09:41:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:25,309 INFO L93 Difference]: Finished difference Result 4606 states and 6791 transitions. [2020-12-22 09:41:25,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:25,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:41:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:25,319 INFO L225 Difference]: With dead ends: 4606 [2020-12-22 09:41:25,319 INFO L226 Difference]: Without dead ends: 2056 [2020-12-22 09:41:25,323 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 09:41:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2020-12-22 09:41:25,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 2054. [2020-12-22 09:41:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2054 states. [2020-12-22 09:41:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 3214 transitions. [2020-12-22 09:41:25,437 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 3214 transitions. Word has length 64 [2020-12-22 09:41:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:25,438 INFO L481 AbstractCegarLoop]: Abstraction has 2054 states and 3214 transitions. [2020-12-22 09:41:25,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:25,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 3214 transitions. [2020-12-22 09:41:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:41:25,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:25,439 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:25,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:41:25,440 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:25,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:25,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1159171252, now seen corresponding path program 1 times [2020-12-22 09:41:25,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:25,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189354999] [2020-12-22 09:41:25,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:25,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189354999] [2020-12-22 09:41:25,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738671956] [2020-12-22 09:41:25,711 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 09:41:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:25,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:41:25,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:41:26,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:26,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:41:26,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904967301] [2020-12-22 09:41:26,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:41:26,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:26,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:41:26,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:41:26,176 INFO L87 Difference]: Start difference. First operand 2054 states and 3214 transitions. Second operand 12 states. [2020-12-22 09:41:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:28,954 INFO L93 Difference]: Finished difference Result 8445 states and 11918 transitions. [2020-12-22 09:41:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:41:28,955 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2020-12-22 09:41:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:28,986 INFO L225 Difference]: With dead ends: 8445 [2020-12-22 09:41:28,986 INFO L226 Difference]: Without dead ends: 7471 [2020-12-22 09:41:28,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 09:41:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7471 states. [2020-12-22 09:41:29,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7471 to 5188. [2020-12-22 09:41:29,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5188 states. [2020-12-22 09:41:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 7401 transitions. [2020-12-22 09:41:29,561 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 7401 transitions. Word has length 64 [2020-12-22 09:41:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:29,562 INFO L481 AbstractCegarLoop]: Abstraction has 5188 states and 7401 transitions. [2020-12-22 09:41:29,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:41:29,562 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 7401 transitions. [2020-12-22 09:41:29,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:29,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:29,563 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:29,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 09:41:29,777 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:29,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1862030833, now seen corresponding path program 1 times [2020-12-22 09:41:29,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:29,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348715410] [2020-12-22 09:41:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:30,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348715410] [2020-12-22 09:41:30,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614728284] [2020-12-22 09:41:30,046 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 09:41:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:30,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:41:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:30,328 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:30,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:30,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:41:30,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888764427] [2020-12-22 09:41:30,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:41:30,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:30,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:41:30,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:41:30,626 INFO L87 Difference]: Start difference. First operand 5188 states and 7401 transitions. Second operand 17 states. [2020-12-22 09:41:33,432 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:41:35,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:35,600 INFO L93 Difference]: Finished difference Result 27468 states and 37139 transitions. [2020-12-22 09:41:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:41:35,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-12-22 09:41:35,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:35,655 INFO L225 Difference]: With dead ends: 27468 [2020-12-22 09:41:35,656 INFO L226 Difference]: Without dead ends: 23058 [2020-12-22 09:41:35,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:41:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23058 states. [2020-12-22 09:41:36,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23058 to 10468. [2020-12-22 09:41:36,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10468 states. [2020-12-22 09:41:36,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 14309 transitions. [2020-12-22 09:41:36,861 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 14309 transitions. Word has length 65 [2020-12-22 09:41:36,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:36,862 INFO L481 AbstractCegarLoop]: Abstraction has 10468 states and 14309 transitions. [2020-12-22 09:41:36,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:41:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 14309 transitions. [2020-12-22 09:41:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:36,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:36,864 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:37,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:41:37,078 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:37,079 INFO L82 PathProgramCache]: Analyzing trace with hash 664153647, now seen corresponding path program 1 times [2020-12-22 09:41:37,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:37,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110710539] [2020-12-22 09:41:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:37,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110710539] [2020-12-22 09:41:37,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670177604] [2020-12-22 09:41:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:41:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:37,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:41:37,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:37,615 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:37,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:37,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-12-22 09:41:37,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829735828] [2020-12-22 09:41:37,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:41:37,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:37,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:41:37,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:41:37,917 INFO L87 Difference]: Start difference. First operand 10468 states and 14309 transitions. Second operand 18 states. [2020-12-22 09:41:42,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:42,971 INFO L93 Difference]: Finished difference Result 51564 states and 67947 transitions. [2020-12-22 09:41:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:41:42,972 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-12-22 09:41:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:43,092 INFO L225 Difference]: With dead ends: 51564 [2020-12-22 09:41:43,092 INFO L226 Difference]: Without dead ends: 41874 [2020-12-22 09:41:43,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:41:43,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41874 states. [2020-12-22 09:41:45,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41874 to 27222. [2020-12-22 09:41:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27222 states. [2020-12-22 09:41:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27222 states to 27222 states and 36055 transitions. [2020-12-22 09:41:45,890 INFO L78 Accepts]: Start accepts. Automaton has 27222 states and 36055 transitions. Word has length 65 [2020-12-22 09:41:45,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:45,891 INFO L481 AbstractCegarLoop]: Abstraction has 27222 states and 36055 transitions. [2020-12-22 09:41:45,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:41:45,891 INFO L276 IsEmpty]: Start isEmpty. Operand 27222 states and 36055 transitions. [2020-12-22 09:41:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:45,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:45,894 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] [2020-12-22 09:41:46,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:41:46,105 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:46,106 INFO L82 PathProgramCache]: Analyzing trace with hash -386254747, now seen corresponding path program 1 times [2020-12-22 09:41:46,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:46,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183718223] [2020-12-22 09:41:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:46,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183718223] [2020-12-22 09:41:46,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:46,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:46,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130917368] [2020-12-22 09:41:46,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:46,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:46,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:46,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:46,335 INFO L87 Difference]: Start difference. First operand 27222 states and 36055 transitions. Second operand 3 states. [2020-12-22 09:41:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:47,905 INFO L93 Difference]: Finished difference Result 38680 states and 51047 transitions. [2020-12-22 09:41:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:47,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:41:47,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:47,939 INFO L225 Difference]: With dead ends: 38680 [2020-12-22 09:41:47,939 INFO L226 Difference]: Without dead ends: 12236 [2020-12-22 09:41:47,968 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 09:41:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12236 states. [2020-12-22 09:41:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12236 to 11359. [2020-12-22 09:41:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11359 states. [2020-12-22 09:41:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11359 states to 11359 states and 15079 transitions. [2020-12-22 09:41:49,034 INFO L78 Accepts]: Start accepts. Automaton has 11359 states and 15079 transitions. Word has length 65 [2020-12-22 09:41:49,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:49,034 INFO L481 AbstractCegarLoop]: Abstraction has 11359 states and 15079 transitions. [2020-12-22 09:41:49,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:49,034 INFO L276 IsEmpty]: Start isEmpty. Operand 11359 states and 15079 transitions. [2020-12-22 09:41:49,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:49,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:49,036 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:49,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:41:49,037 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:49,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1828535725, now seen corresponding path program 1 times [2020-12-22 09:41:49,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:49,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733054377] [2020-12-22 09:41:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:41:49,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733054377] [2020-12-22 09:41:49,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:49,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:49,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921673892] [2020-12-22 09:41:49,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:49,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:49,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:49,117 INFO L87 Difference]: Start difference. First operand 11359 states and 15079 transitions. Second operand 6 states. [2020-12-22 09:41:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:50,052 INFO L93 Difference]: Finished difference Result 20150 states and 26452 transitions. [2020-12-22 09:41:50,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:50,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 09:41:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:50,070 INFO L225 Difference]: With dead ends: 20150 [2020-12-22 09:41:50,070 INFO L226 Difference]: Without dead ends: 9642 [2020-12-22 09:41:50,081 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 09:41:50,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9642 states. [2020-12-22 09:41:51,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9642 to 9642. [2020-12-22 09:41:51,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9642 states. [2020-12-22 09:41:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9642 states to 9642 states and 12642 transitions. [2020-12-22 09:41:51,097 INFO L78 Accepts]: Start accepts. Automaton has 9642 states and 12642 transitions. Word has length 65 [2020-12-22 09:41:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:51,097 INFO L481 AbstractCegarLoop]: Abstraction has 9642 states and 12642 transitions. [2020-12-22 09:41:51,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:51,097 INFO L276 IsEmpty]: Start isEmpty. Operand 9642 states and 12642 transitions. [2020-12-22 09:41:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:51,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:51,099 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:51,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:41:51,099 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:51,100 INFO L82 PathProgramCache]: Analyzing trace with hash 269786861, now seen corresponding path program 1 times [2020-12-22 09:41:51,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:51,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419632537] [2020-12-22 09:41:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:41:51,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419632537] [2020-12-22 09:41:51,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:51,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:51,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358335749] [2020-12-22 09:41:51,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:51,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:51,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:51,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:51,164 INFO L87 Difference]: Start difference. First operand 9642 states and 12642 transitions. Second operand 6 states. [2020-12-22 09:41:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:52,162 INFO L93 Difference]: Finished difference Result 16199 states and 20958 transitions. [2020-12-22 09:41:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:52,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 09:41:52,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:52,174 INFO L225 Difference]: With dead ends: 16199 [2020-12-22 09:41:52,174 INFO L226 Difference]: Without dead ends: 7446 [2020-12-22 09:41:52,182 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 09:41:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7446 states. [2020-12-22 09:41:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7446 to 7446. [2020-12-22 09:41:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7446 states. [2020-12-22 09:41:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7446 states to 7446 states and 9730 transitions. [2020-12-22 09:41:52,813 INFO L78 Accepts]: Start accepts. Automaton has 7446 states and 9730 transitions. Word has length 65 [2020-12-22 09:41:52,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:52,813 INFO L481 AbstractCegarLoop]: Abstraction has 7446 states and 9730 transitions. [2020-12-22 09:41:52,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:52,813 INFO L276 IsEmpty]: Start isEmpty. Operand 7446 states and 9730 transitions. [2020-12-22 09:41:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:52,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:52,815 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:52,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:41:52,816 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:52,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:52,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1061129165, now seen corresponding path program 1 times [2020-12-22 09:41:52,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:52,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287387547] [2020-12-22 09:41:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:41:52,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287387547] [2020-12-22 09:41:52,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:52,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:52,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157921688] [2020-12-22 09:41:52,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:52,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:52,895 INFO L87 Difference]: Start difference. First operand 7446 states and 9730 transitions. Second operand 6 states. [2020-12-22 09:41:53,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:53,744 INFO L93 Difference]: Finished difference Result 12612 states and 16203 transitions. [2020-12-22 09:41:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:53,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 09:41:53,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:53,758 INFO L225 Difference]: With dead ends: 12612 [2020-12-22 09:41:53,758 INFO L226 Difference]: Without dead ends: 5979 [2020-12-22 09:41:53,766 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 09:41:53,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5979 states. [2020-12-22 09:41:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5979 to 5979. [2020-12-22 09:41:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5979 states. [2020-12-22 09:41:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5979 states to 5979 states and 7861 transitions. [2020-12-22 09:41:54,341 INFO L78 Accepts]: Start accepts. Automaton has 5979 states and 7861 transitions. Word has length 65 [2020-12-22 09:41:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:54,341 INFO L481 AbstractCegarLoop]: Abstraction has 5979 states and 7861 transitions. [2020-12-22 09:41:54,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 5979 states and 7861 transitions. [2020-12-22 09:41:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:41:54,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:54,343 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:54,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:41:54,343 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:54,344 INFO L82 PathProgramCache]: Analyzing trace with hash 695787833, now seen corresponding path program 1 times [2020-12-22 09:41:54,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:54,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054107438] [2020-12-22 09:41:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:55,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054107438] [2020-12-22 09:41:55,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455692732] [2020-12-22 09:41:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:41:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:55,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 09:41:55,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:56,453 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:56,956 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:41:56,975 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:41:56,977 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:41:56,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:41:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:57,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:57,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 39 [2020-12-22 09:41:57,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610304634] [2020-12-22 09:41:57,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:41:57,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:57,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:41:57,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:41:57,711 INFO L87 Difference]: Start difference. First operand 5979 states and 7861 transitions. Second operand 39 states. [2020-12-22 09:41:58,012 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-12-22 09:41:59,323 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-12-22 09:41:59,601 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-12-22 09:41:59,869 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:42:00,199 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-12-22 09:42:00,545 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-12-22 09:42:00,829 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-12-22 09:42:01,126 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-12-22 09:42:01,393 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-22 09:42:01,661 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:42:05,328 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-12-22 09:42:05,746 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-12-22 09:42:06,136 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-12-22 09:42:06,760 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-12-22 09:42:07,066 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 09:42:07,287 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-22 09:42:07,466 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-22 09:42:07,634 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-22 09:42:07,890 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-22 09:42:09,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:09,150 INFO L93 Difference]: Finished difference Result 9572 states and 12372 transitions. [2020-12-22 09:42:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 09:42:09,152 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 66 [2020-12-22 09:42:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:09,161 INFO L225 Difference]: With dead ends: 9572 [2020-12-22 09:42:09,161 INFO L226 Difference]: Without dead ends: 7702 [2020-12-22 09:42:09,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1370, Invalid=7560, Unknown=0, NotChecked=0, Total=8930 [2020-12-22 09:42:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7702 states. [2020-12-22 09:42:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7702 to 5868. [2020-12-22 09:42:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5868 states. [2020-12-22 09:42:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 7759 transitions. [2020-12-22 09:42:09,701 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 7759 transitions. Word has length 66 [2020-12-22 09:42:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:09,701 INFO L481 AbstractCegarLoop]: Abstraction has 5868 states and 7759 transitions. [2020-12-22 09:42:09,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:42:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 7759 transitions. [2020-12-22 09:42:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:42:09,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:09,702 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:42:09,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:09,908 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:09,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:09,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1166524545, now seen corresponding path program 1 times [2020-12-22 09:42:09,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:09,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936478794] [2020-12-22 09:42:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:10,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936478794] [2020-12-22 09:42:10,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49419647] [2020-12-22 09:42:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:11,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 09:42:11,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:12,992 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-12-22 09:42:12,992 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:12,994 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:42:13,571 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46