/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.4.1.ufo.UNBOUNDED.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:42:05,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:42:05,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:42:05,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:42:05,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:42:05,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:42:05,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:42:05,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:42:05,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:42:05,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:42:05,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:42:05,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:42:05,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:42:05,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:42:05,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:42:05,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:42:05,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:42:05,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:42:05,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:42:05,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:42:05,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:42:05,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:42:05,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:42:05,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:42:05,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 09:42:05,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 09:42:05,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 09:42:05,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 09:42:05,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 09:42:05,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 09:42:05,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:42:05,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:42:05,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:42:05,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:42:05,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:42:05,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:42:05,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:42:05,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:42:05,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:42:05,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:42:05,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:42:05,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:42:05,547 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:42:05,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:42:05,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:42:05,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:42:05,553 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:42:05,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:42:05,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:42:05,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:42:05,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:42:05,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:42:05,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:42:05,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:42:05,556 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:42:05,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:42:05,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:42:05,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:42:05,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:42:05,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:42:05,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:42:05,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:42:05,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:42:05,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:42:05,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:42:05,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:42:05,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:42:05,559 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:42:05,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:42:05,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:42:05,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:42:05,941 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:42:05,942 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:42:05,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 09:42:06,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/496a7852f/d58f06380cd64a0b914df40a596e7254/FLAGd6829af56 [2020-12-22 09:42:07,077 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:42:07,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 09:42:07,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/496a7852f/d58f06380cd64a0b914df40a596e7254/FLAGd6829af56 [2020-12-22 09:42:07,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/496a7852f/d58f06380cd64a0b914df40a596e7254 [2020-12-22 09:42:07,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:42:07,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:42:07,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:42:07,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:42:07,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:42:07,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:42:07" (1/1) ... [2020-12-22 09:42:07,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e7083d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:07, skipping insertion in model container [2020-12-22 09:42:07,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:42:07" (1/1) ... [2020-12-22 09:42:07,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:42:07,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:42:08,040 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.4.1.ufo.UNBOUNDED.pals+Problem12_label02.c[8821,8834] [2020-12-22 09:42:08,128 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.4.1.ufo.UNBOUNDED.pals+Problem12_label02.c[15868,15881] [2020-12-22 09:42:09,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:42:09,146 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:42:09,211 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.4.1.ufo.UNBOUNDED.pals+Problem12_label02.c[8821,8834] [2020-12-22 09:42:09,235 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.4.1.ufo.UNBOUNDED.pals+Problem12_label02.c[15868,15881] [2020-12-22 09:42:09,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:42:09,952 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:42:09,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:09 WrapperNode [2020-12-22 09:42:09,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:42:09,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:42:09,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:42:09,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:42:09,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:09" (1/1) ... [2020-12-22 09:42:10,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:09" (1/1) ... [2020-12-22 09:42:10,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:42:10,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:42:10,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:42:10,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:42:10,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:09" (1/1) ... [2020-12-22 09:42:10,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:09" (1/1) ... [2020-12-22 09:42:10,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:09" (1/1) ... [2020-12-22 09:42:10,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:09" (1/1) ... [2020-12-22 09:42:10,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:09" (1/1) ... [2020-12-22 09:42:10,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:09" (1/1) ... [2020-12-22 09:42:10,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:09" (1/1) ... [2020-12-22 09:42:11,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:42:11,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:42:11,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:42:11,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:42:11,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:09" (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 09:42:11,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:42:11,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:42:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:42:11,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:42:16,138 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:42:16,138 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:42:16,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:42:16 BoogieIcfgContainer [2020-12-22 09:42:16,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:42:16,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:42:16,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:42:16,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:42:16,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:42:07" (1/3) ... [2020-12-22 09:42:16,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71735b25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:42:16, skipping insertion in model container [2020-12-22 09:42:16,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:09" (2/3) ... [2020-12-22 09:42:16,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71735b25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:42:16, skipping insertion in model container [2020-12-22 09:42:16,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:42:16" (3/3) ... [2020-12-22 09:42:16,161 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 09:42:16,174 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:42:16,180 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:42:16,201 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:42:16,240 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:42:16,240 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:42:16,240 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:42:16,241 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:42:16,241 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:42:16,241 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:42:16,241 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:42:16,241 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:42:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states. [2020-12-22 09:42:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:42:16,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:16,290 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] [2020-12-22 09:42:16,291 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:16,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:16,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2020-12-22 09:42:16,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:16,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379233264] [2020-12-22 09:42:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:16,542 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 09:42:16,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379233264] [2020-12-22 09:42:16,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:16,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:42:16,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110110167] [2020-12-22 09:42:16,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:42:16,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:16,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:42:16,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:42:16,622 INFO L87 Difference]: Start difference. First operand 894 states. Second operand 2 states. [2020-12-22 09:42:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:16,720 INFO L93 Difference]: Finished difference Result 1757 states and 3334 transitions. [2020-12-22 09:42:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:42:16,721 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:42:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:16,755 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:42:16,755 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:42:16,766 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 09:42:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:42:16,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:42:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:42:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1562 transitions. [2020-12-22 09:42:16,889 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1562 transitions. Word has length 30 [2020-12-22 09:42:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:16,890 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1562 transitions. [2020-12-22 09:42:16,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:42:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1562 transitions. [2020-12-22 09:42:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:42:16,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:16,893 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] [2020-12-22 09:42:16,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:42:16,894 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:16,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2020-12-22 09:42:16,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:16,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278268447] [2020-12-22 09:42:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:17,074 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 09:42:17,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278268447] [2020-12-22 09:42:17,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:17,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:17,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129991154] [2020-12-22 09:42:17,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:42:17,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:17,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:42:17,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:42:17,079 INFO L87 Difference]: Start difference. First operand 828 states and 1562 transitions. Second operand 5 states. [2020-12-22 09:42:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:17,178 INFO L93 Difference]: Finished difference Result 877 states and 1637 transitions. [2020-12-22 09:42:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:42:17,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:42:17,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:17,184 INFO L225 Difference]: With dead ends: 877 [2020-12-22 09:42:17,184 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:42:17,186 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 09:42:17,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:42:17,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:42:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:42:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1539 transitions. [2020-12-22 09:42:17,206 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1539 transitions. Word has length 30 [2020-12-22 09:42:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:17,207 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1539 transitions. [2020-12-22 09:42:17,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:42:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1539 transitions. [2020-12-22 09:42:17,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:42:17,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:17,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:17,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:42:17,210 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2020-12-22 09:42:17,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:17,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273340334] [2020-12-22 09:42:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:17,372 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 09:42:17,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273340334] [2020-12-22 09:42:17,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:17,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:17,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289696321] [2020-12-22 09:42:17,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:17,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:17,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:17,379 INFO L87 Difference]: Start difference. First operand 828 states and 1539 transitions. Second operand 6 states. [2020-12-22 09:42:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:17,624 INFO L93 Difference]: Finished difference Result 1188 states and 2107 transitions. [2020-12-22 09:42:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:42:17,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:42:17,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:17,635 INFO L225 Difference]: With dead ends: 1188 [2020-12-22 09:42:17,637 INFO L226 Difference]: Without dead ends: 1143 [2020-12-22 09:42:17,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:42:17,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2020-12-22 09:42:17,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 871. [2020-12-22 09:42:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2020-12-22 09:42:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1607 transitions. [2020-12-22 09:42:17,676 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1607 transitions. Word has length 52 [2020-12-22 09:42:17,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:17,676 INFO L481 AbstractCegarLoop]: Abstraction has 871 states and 1607 transitions. [2020-12-22 09:42:17,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1607 transitions. [2020-12-22 09:42:17,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:42:17,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:17,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:17,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:42:17,686 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:17,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:17,686 INFO L82 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2020-12-22 09:42:17,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:17,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266229300] [2020-12-22 09:42:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:17,842 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 09:42:17,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266229300] [2020-12-22 09:42:17,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:17,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:17,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707156349] [2020-12-22 09:42:17,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:17,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:17,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:17,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:17,845 INFO L87 Difference]: Start difference. First operand 871 states and 1607 transitions. Second operand 3 states. [2020-12-22 09:42:17,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:17,897 INFO L93 Difference]: Finished difference Result 1036 states and 1866 transitions. [2020-12-22 09:42:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:17,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:42:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:17,904 INFO L225 Difference]: With dead ends: 1036 [2020-12-22 09:42:17,905 INFO L226 Difference]: Without dead ends: 948 [2020-12-22 09:42:17,906 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 09:42:17,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2020-12-22 09:42:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 944. [2020-12-22 09:42:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-12-22 09:42:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1719 transitions. [2020-12-22 09:42:17,932 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1719 transitions. Word has length 54 [2020-12-22 09:42:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:17,932 INFO L481 AbstractCegarLoop]: Abstraction has 944 states and 1719 transitions. [2020-12-22 09:42:17,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1719 transitions. [2020-12-22 09:42:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:42:17,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:17,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:17,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:42:17,934 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:17,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:17,935 INFO L82 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2020-12-22 09:42:17,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:17,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744243376] [2020-12-22 09:42:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:18,097 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 09:42:18,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744243376] [2020-12-22 09:42:18,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:18,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:18,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304003103] [2020-12-22 09:42:18,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:18,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:18,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:18,100 INFO L87 Difference]: Start difference. First operand 944 states and 1719 transitions. Second operand 6 states. [2020-12-22 09:42:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:18,302 INFO L93 Difference]: Finished difference Result 1107 states and 1971 transitions. [2020-12-22 09:42:18,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:18,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:42:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:18,309 INFO L225 Difference]: With dead ends: 1107 [2020-12-22 09:42:18,309 INFO L226 Difference]: Without dead ends: 946 [2020-12-22 09:42:18,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:42:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2020-12-22 09:42:18,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2020-12-22 09:42:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-12-22 09:42:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1717 transitions. [2020-12-22 09:42:18,348 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1717 transitions. Word has length 54 [2020-12-22 09:42:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:18,349 INFO L481 AbstractCegarLoop]: Abstraction has 944 states and 1717 transitions. [2020-12-22 09:42:18,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1717 transitions. [2020-12-22 09:42:18,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:42:18,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:18,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:18,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:42:18,353 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:18,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2020-12-22 09:42:18,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:18,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976365110] [2020-12-22 09:42:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:18,466 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 09:42:18,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976365110] [2020-12-22 09:42:18,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:18,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:18,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56234755] [2020-12-22 09:42:18,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:18,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:18,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:18,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:18,472 INFO L87 Difference]: Start difference. First operand 944 states and 1717 transitions. Second operand 3 states. [2020-12-22 09:42:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:18,525 INFO L93 Difference]: Finished difference Result 1242 states and 2175 transitions. [2020-12-22 09:42:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:18,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:42:18,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:18,534 INFO L225 Difference]: With dead ends: 1242 [2020-12-22 09:42:18,534 INFO L226 Difference]: Without dead ends: 1081 [2020-12-22 09:42:18,536 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 09:42:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-12-22 09:42:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1079. [2020-12-22 09:42:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1079 states. [2020-12-22 09:42:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1921 transitions. [2020-12-22 09:42:18,574 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1921 transitions. Word has length 54 [2020-12-22 09:42:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:18,575 INFO L481 AbstractCegarLoop]: Abstraction has 1079 states and 1921 transitions. [2020-12-22 09:42:18,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:18,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1921 transitions. [2020-12-22 09:42:18,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:42:18,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:18,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:18,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:42:18,581 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:18,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2020-12-22 09:42:18,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:18,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826650733] [2020-12-22 09:42:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:18,682 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 09:42:18,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826650733] [2020-12-22 09:42:18,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:18,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:18,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398972408] [2020-12-22 09:42:18,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:18,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:18,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:18,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:18,685 INFO L87 Difference]: Start difference. First operand 1079 states and 1921 transitions. Second operand 3 states. [2020-12-22 09:42:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:18,745 INFO L93 Difference]: Finished difference Result 1623 states and 2747 transitions. [2020-12-22 09:42:18,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:18,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:42:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:18,754 INFO L225 Difference]: With dead ends: 1623 [2020-12-22 09:42:18,755 INFO L226 Difference]: Without dead ends: 1327 [2020-12-22 09:42:18,757 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 09:42:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2020-12-22 09:42:18,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1325. [2020-12-22 09:42:18,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2020-12-22 09:42:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2285 transitions. [2020-12-22 09:42:18,810 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2285 transitions. Word has length 54 [2020-12-22 09:42:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:18,810 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 2285 transitions. [2020-12-22 09:42:18,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2285 transitions. [2020-12-22 09:42:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:42:18,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:18,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:18,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:42:18,812 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:18,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2020-12-22 09:42:18,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:18,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328832673] [2020-12-22 09:42:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:18,877 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 09:42:18,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328832673] [2020-12-22 09:42:18,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:18,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:18,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3183635] [2020-12-22 09:42:18,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:18,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:18,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:18,880 INFO L87 Difference]: Start difference. First operand 1325 states and 2285 transitions. Second operand 3 states. [2020-12-22 09:42:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:18,946 INFO L93 Difference]: Finished difference Result 2313 states and 3759 transitions. [2020-12-22 09:42:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:18,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:42:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:18,959 INFO L225 Difference]: With dead ends: 2313 [2020-12-22 09:42:18,959 INFO L226 Difference]: Without dead ends: 1771 [2020-12-22 09:42:18,961 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 09:42:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2020-12-22 09:42:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1769. [2020-12-22 09:42:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2020-12-22 09:42:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2925 transitions. [2020-12-22 09:42:19,045 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2925 transitions. Word has length 54 [2020-12-22 09:42:19,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:19,046 INFO L481 AbstractCegarLoop]: Abstraction has 1769 states and 2925 transitions. [2020-12-22 09:42:19,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2925 transitions. [2020-12-22 09:42:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:42:19,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:19,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:19,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:42:19,047 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:19,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2020-12-22 09:42:19,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:19,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861479170] [2020-12-22 09:42:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:19,128 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 09:42:19,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861479170] [2020-12-22 09:42:19,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:19,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:19,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130810728] [2020-12-22 09:42:19,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:42:19,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:19,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:42:19,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:42:19,131 INFO L87 Difference]: Start difference. First operand 1769 states and 2925 transitions. Second operand 5 states. [2020-12-22 09:42:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:19,296 INFO L93 Difference]: Finished difference Result 2523 states and 4010 transitions. [2020-12-22 09:42:19,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:42:19,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:42:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:19,310 INFO L225 Difference]: With dead ends: 2523 [2020-12-22 09:42:19,311 INFO L226 Difference]: Without dead ends: 2521 [2020-12-22 09:42:19,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:42:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2020-12-22 09:42:19,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1817. [2020-12-22 09:42:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1817 states. [2020-12-22 09:42:19,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2965 transitions. [2020-12-22 09:42:19,418 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2965 transitions. Word has length 55 [2020-12-22 09:42:19,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:19,418 INFO L481 AbstractCegarLoop]: Abstraction has 1817 states and 2965 transitions. [2020-12-22 09:42:19,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:42:19,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2965 transitions. [2020-12-22 09:42:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:42:19,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:19,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:19,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:42:19,420 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:19,473 INFO L82 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2020-12-22 09:42:19,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:19,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147287607] [2020-12-22 09:42:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:19,526 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 09:42:19,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147287607] [2020-12-22 09:42:19,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:19,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:19,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262297585] [2020-12-22 09:42:19,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:19,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:19,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:19,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:19,529 INFO L87 Difference]: Start difference. First operand 1817 states and 2965 transitions. Second operand 3 states. [2020-12-22 09:42:19,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:19,655 INFO L93 Difference]: Finished difference Result 2880 states and 4523 transitions. [2020-12-22 09:42:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:19,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:42:19,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:19,668 INFO L225 Difference]: With dead ends: 2880 [2020-12-22 09:42:19,668 INFO L226 Difference]: Without dead ends: 2285 [2020-12-22 09:42:19,673 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 09:42:19,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-12-22 09:42:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2283. [2020-12-22 09:42:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 09:42:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3623 transitions. [2020-12-22 09:42:19,815 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3623 transitions. Word has length 56 [2020-12-22 09:42:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:19,815 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3623 transitions. [2020-12-22 09:42:19,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3623 transitions. [2020-12-22 09:42:19,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:42:19,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:19,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:19,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:42:19,817 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:19,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:19,818 INFO L82 PathProgramCache]: Analyzing trace with hash 607820130, now seen corresponding path program 1 times [2020-12-22 09:42:19,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:19,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703752351] [2020-12-22 09:42:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:19,893 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 09:42:19,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703752351] [2020-12-22 09:42:19,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:19,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:42:19,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316091324] [2020-12-22 09:42:19,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:19,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:19,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:19,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:19,897 INFO L87 Difference]: Start difference. First operand 2283 states and 3623 transitions. Second operand 3 states. [2020-12-22 09:42:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:25,939 INFO L93 Difference]: Finished difference Result 3787 states and 6496 transitions. [2020-12-22 09:42:25,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:25,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 09:42:25,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:25,956 INFO L225 Difference]: With dead ends: 3787 [2020-12-22 09:42:25,957 INFO L226 Difference]: Without dead ends: 3034 [2020-12-22 09:42:25,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:25,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2020-12-22 09:42:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 3034. [2020-12-22 09:42:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:42:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4602 transitions. [2020-12-22 09:42:26,091 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4602 transitions. Word has length 63 [2020-12-22 09:42:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:26,091 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4602 transitions. [2020-12-22 09:42:26,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:26,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4602 transitions. [2020-12-22 09:42:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:42:26,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:26,093 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:26,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:42:26,094 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:26,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:26,094 INFO L82 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2020-12-22 09:42:26,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:26,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251789514] [2020-12-22 09:42:26,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:42:26,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251789514] [2020-12-22 09:42:26,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:26,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:26,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964718664] [2020-12-22 09:42:26,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:26,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:26,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:26,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:26,188 INFO L87 Difference]: Start difference. First operand 3034 states and 4602 transitions. Second operand 6 states. [2020-12-22 09:42:26,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:26,632 INFO L93 Difference]: Finished difference Result 9340 states and 13643 transitions. [2020-12-22 09:42:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:26,633 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:42:26,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:26,692 INFO L225 Difference]: With dead ends: 9340 [2020-12-22 09:42:26,692 INFO L226 Difference]: Without dead ends: 7842 [2020-12-22 09:42:26,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:42:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2020-12-22 09:42:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2020-12-22 09:42:26,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4530 states. [2020-12-22 09:42:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6730 transitions. [2020-12-22 09:42:26,976 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6730 transitions. Word has length 78 [2020-12-22 09:42:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:26,976 INFO L481 AbstractCegarLoop]: Abstraction has 4530 states and 6730 transitions. [2020-12-22 09:42:26,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:26,976 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6730 transitions. [2020-12-22 09:42:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:42:26,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:26,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:26,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:42:26,979 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:26,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:26,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2020-12-22 09:42:26,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:26,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999492012] [2020-12-22 09:42:26,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:42:27,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999492012] [2020-12-22 09:42:27,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:27,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:27,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140269163] [2020-12-22 09:42:27,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:27,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:27,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:27,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:27,088 INFO L87 Difference]: Start difference. First operand 4530 states and 6730 transitions. Second operand 6 states. [2020-12-22 09:42:27,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:27,667 INFO L93 Difference]: Finished difference Result 10836 states and 15771 transitions. [2020-12-22 09:42:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:27,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:42:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:27,691 INFO L225 Difference]: With dead ends: 10836 [2020-12-22 09:42:27,691 INFO L226 Difference]: Without dead ends: 9338 [2020-12-22 09:42:27,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:42:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2020-12-22 09:42:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2020-12-22 09:42:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6778 states. [2020-12-22 09:42:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9902 transitions. [2020-12-22 09:42:28,114 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9902 transitions. Word has length 78 [2020-12-22 09:42:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:28,114 INFO L481 AbstractCegarLoop]: Abstraction has 6778 states and 9902 transitions. [2020-12-22 09:42:28,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9902 transitions. [2020-12-22 09:42:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:42:28,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:28,117 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:28,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:42:28,118 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:28,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:28,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2020-12-22 09:42:28,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:28,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53546439] [2020-12-22 09:42:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:42:28,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53546439] [2020-12-22 09:42:28,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:28,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:28,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199648300] [2020-12-22 09:42:28,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:28,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:28,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:28,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:28,212 INFO L87 Difference]: Start difference. First operand 6778 states and 9902 transitions. Second operand 6 states. [2020-12-22 09:42:28,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:28,828 INFO L93 Difference]: Finished difference Result 12332 states and 17899 transitions. [2020-12-22 09:42:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:28,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:42:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:28,855 INFO L225 Difference]: With dead ends: 12332 [2020-12-22 09:42:28,855 INFO L226 Difference]: Without dead ends: 10834 [2020-12-22 09:42:28,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:42:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2020-12-22 09:42:29,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2020-12-22 09:42:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2020-12-22 09:42:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 12030 transitions. [2020-12-22 09:42:29,431 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 12030 transitions. Word has length 78 [2020-12-22 09:42:29,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:29,431 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 12030 transitions. [2020-12-22 09:42:29,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 12030 transitions. [2020-12-22 09:42:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:42:29,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:29,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:29,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:42:29,435 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:29,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:29,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2020-12-22 09:42:29,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:29,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270603042] [2020-12-22 09:42:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:29,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270603042] [2020-12-22 09:42:29,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:29,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:29,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98952110] [2020-12-22 09:42:29,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:29,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:29,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:29,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:29,510 INFO L87 Difference]: Start difference. First operand 8274 states and 12030 transitions. Second operand 3 states. [2020-12-22 09:42:29,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:29,812 INFO L93 Difference]: Finished difference Result 13055 states and 18902 transitions. [2020-12-22 09:42:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:29,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:42:29,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:29,827 INFO L225 Difference]: With dead ends: 13055 [2020-12-22 09:42:29,828 INFO L226 Difference]: Without dead ends: 6317 [2020-12-22 09:42:29,839 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 09:42:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2020-12-22 09:42:30,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 6315. [2020-12-22 09:42:30,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6315 states. [2020-12-22 09:42:30,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 9247 transitions. [2020-12-22 09:42:30,166 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 9247 transitions. Word has length 80 [2020-12-22 09:42:30,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:30,167 INFO L481 AbstractCegarLoop]: Abstraction has 6315 states and 9247 transitions. [2020-12-22 09:42:30,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:30,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 9247 transitions. [2020-12-22 09:42:30,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:42:30,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:30,170 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:30,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:42:30,171 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:30,172 INFO L82 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2020-12-22 09:42:30,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:30,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321775584] [2020-12-22 09:42:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:42:30,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321775584] [2020-12-22 09:42:30,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:30,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:30,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54624365] [2020-12-22 09:42:30,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:30,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:30,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:30,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:30,283 INFO L87 Difference]: Start difference. First operand 6315 states and 9247 transitions. Second operand 6 states. [2020-12-22 09:42:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:30,970 INFO L93 Difference]: Finished difference Result 10549 states and 15332 transitions. [2020-12-22 09:42:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:30,971 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:42:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:30,993 INFO L225 Difference]: With dead ends: 10549 [2020-12-22 09:42:30,993 INFO L226 Difference]: Without dead ends: 9491 [2020-12-22 09:42:30,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:42:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2020-12-22 09:42:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 7371. [2020-12-22 09:42:31,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7371 states. [2020-12-22 09:42:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7371 states to 7371 states and 10751 transitions. [2020-12-22 09:42:31,480 INFO L78 Accepts]: Start accepts. Automaton has 7371 states and 10751 transitions. Word has length 80 [2020-12-22 09:42:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:31,481 INFO L481 AbstractCegarLoop]: Abstraction has 7371 states and 10751 transitions. [2020-12-22 09:42:31,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 7371 states and 10751 transitions. [2020-12-22 09:42:31,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:31,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:31,485 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:31,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:42:31,485 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:31,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:31,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2020-12-22 09:42:31,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:31,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511368335] [2020-12-22 09:42:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:31,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511368335] [2020-12-22 09:42:31,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:31,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:31,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640019746] [2020-12-22 09:42:31,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:31,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:31,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:31,560 INFO L87 Difference]: Start difference. First operand 7371 states and 10751 transitions. Second operand 3 states. [2020-12-22 09:42:31,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:31,756 INFO L93 Difference]: Finished difference Result 10279 states and 14889 transitions. [2020-12-22 09:42:31,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:31,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:42:31,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:31,767 INFO L225 Difference]: With dead ends: 10279 [2020-12-22 09:42:31,767 INFO L226 Difference]: Without dead ends: 4469 [2020-12-22 09:42:31,775 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 09:42:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2020-12-22 09:42:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 4467. [2020-12-22 09:42:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4467 states. [2020-12-22 09:42:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6571 transitions. [2020-12-22 09:42:31,987 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6571 transitions. Word has length 81 [2020-12-22 09:42:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:31,988 INFO L481 AbstractCegarLoop]: Abstraction has 4467 states and 6571 transitions. [2020-12-22 09:42:31,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6571 transitions. [2020-12-22 09:42:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:31,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:31,991 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:31,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:42:31,992 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:31,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:31,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2020-12-22 09:42:31,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:31,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070319048] [2020-12-22 09:42:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:32,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070319048] [2020-12-22 09:42:32,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:32,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:32,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350674891] [2020-12-22 09:42:32,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:32,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:32,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:32,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:32,067 INFO L87 Difference]: Start difference. First operand 4467 states and 6571 transitions. Second operand 3 states. [2020-12-22 09:42:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:32,172 INFO L93 Difference]: Finished difference Result 5923 states and 8619 transitions. [2020-12-22 09:42:32,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:32,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:42:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:32,180 INFO L225 Difference]: With dead ends: 5923 [2020-12-22 09:42:32,181 INFO L226 Difference]: Without dead ends: 3017 [2020-12-22 09:42:32,185 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 09:42:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2020-12-22 09:42:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 3015. [2020-12-22 09:42:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3015 states. [2020-12-22 09:42:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 4503 transitions. [2020-12-22 09:42:32,308 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 4503 transitions. Word has length 81 [2020-12-22 09:42:32,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:32,308 INFO L481 AbstractCegarLoop]: Abstraction has 3015 states and 4503 transitions. [2020-12-22 09:42:32,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:32,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 4503 transitions. [2020-12-22 09:42:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:32,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:32,310 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:32,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:42:32,311 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:32,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2020-12-22 09:42:32,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:32,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62052158] [2020-12-22 09:42:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:32,376 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 09:42:32,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62052158] [2020-12-22 09:42:32,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:32,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:32,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861344195] [2020-12-22 09:42:32,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:32,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:32,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:32,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:32,380 INFO L87 Difference]: Start difference. First operand 3015 states and 4503 transitions. Second operand 3 states. [2020-12-22 09:42:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:32,448 INFO L93 Difference]: Finished difference Result 3745 states and 5517 transitions. [2020-12-22 09:42:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:32,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:42:32,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:32,454 INFO L225 Difference]: With dead ends: 3745 [2020-12-22 09:42:32,454 INFO L226 Difference]: Without dead ends: 2291 [2020-12-22 09:42:32,457 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 09:42:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2020-12-22 09:42:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2289. [2020-12-22 09:42:32,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-12-22 09:42:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 3480 transitions. [2020-12-22 09:42:32,527 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 3480 transitions. Word has length 81 [2020-12-22 09:42:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:32,527 INFO L481 AbstractCegarLoop]: Abstraction has 2289 states and 3480 transitions. [2020-12-22 09:42:32,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 3480 transitions. [2020-12-22 09:42:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:32,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:32,529 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:32,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:42:32,530 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:32,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:32,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2020-12-22 09:42:32,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:32,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515102448] [2020-12-22 09:42:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:32,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515102448] [2020-12-22 09:42:32,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358386613] [2020-12-22 09:42:32,795 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 09:42:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:33,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:42:33,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:42:33,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:42:33,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:42:33,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943347415] [2020-12-22 09:42:33,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:42:33,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:33,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:42:33,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:42:33,591 INFO L87 Difference]: Start difference. First operand 2289 states and 3480 transitions. Second operand 12 states. [2020-12-22 09:42:35,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:35,265 INFO L93 Difference]: Finished difference Result 5722 states and 8129 transitions. [2020-12-22 09:42:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:42:35,266 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-12-22 09:42:35,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:35,284 INFO L225 Difference]: With dead ends: 5722 [2020-12-22 09:42:35,284 INFO L226 Difference]: Without dead ends: 4994 [2020-12-22 09:42:35,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:42:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2020-12-22 09:42:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 4081. [2020-12-22 09:42:35,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4081 states. [2020-12-22 09:42:35,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 5769 transitions. [2020-12-22 09:42:35,575 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 5769 transitions. Word has length 81 [2020-12-22 09:42:35,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:35,576 INFO L481 AbstractCegarLoop]: Abstraction has 4081 states and 5769 transitions. [2020-12-22 09:42:35,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:42:35,576 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 5769 transitions. [2020-12-22 09:42:35,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:42:35,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:35,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:35,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:35,793 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:35,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:35,794 INFO L82 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2020-12-22 09:42:35,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:35,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871534349] [2020-12-22 09:42:35,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:36,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871534349] [2020-12-22 09:42:36,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660194697] [2020-12-22 09:42:36,033 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 09:42:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:36,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:42:36,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:36,401 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:36,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:42:36,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:42:36,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639072770] [2020-12-22 09:42:36,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:42:36,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:36,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:42:36,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:42:36,808 INFO L87 Difference]: Start difference. First operand 4081 states and 5769 transitions. Second operand 17 states. [2020-12-22 09:42:36,935 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:42:39,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:39,962 INFO L93 Difference]: Finished difference Result 14199 states and 18925 transitions. [2020-12-22 09:42:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:42:39,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:42:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:39,989 INFO L225 Difference]: With dead ends: 14199 [2020-12-22 09:42:39,990 INFO L226 Difference]: Without dead ends: 11892 [2020-12-22 09:42:39,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:42:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11892 states. [2020-12-22 09:42:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11892 to 8112. [2020-12-22 09:42:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8112 states. [2020-12-22 09:42:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 10951 transitions. [2020-12-22 09:42:40,746 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 10951 transitions. Word has length 82 [2020-12-22 09:42:40,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:40,747 INFO L481 AbstractCegarLoop]: Abstraction has 8112 states and 10951 transitions. [2020-12-22 09:42:40,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:42:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 10951 transitions. [2020-12-22 09:42:40,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:42:40,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:40,749 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:40,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:40,963 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:40,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1731083323, now seen corresponding path program 1 times [2020-12-22 09:42:40,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:40,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040569400] [2020-12-22 09:42:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:41,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040569400] [2020-12-22 09:42:41,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785986172] [2020-12-22 09:42:41,232 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 09:42:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:41,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:42:41,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:41,551 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:41,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:42:41,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:42:41,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875828148] [2020-12-22 09:42:41,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:42:41,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:41,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:42:41,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:42:41,863 INFO L87 Difference]: Start difference. First operand 8112 states and 10951 transitions. Second operand 17 states. [2020-12-22 09:42:45,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:45,524 INFO L93 Difference]: Finished difference Result 32062 states and 42174 transitions. [2020-12-22 09:42:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:42:45,527 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:42:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:45,579 INFO L225 Difference]: With dead ends: 32062 [2020-12-22 09:42:45,580 INFO L226 Difference]: Without dead ends: 26546 [2020-12-22 09:42:45,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:42:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26546 states. [2020-12-22 09:42:47,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26546 to 18920. [2020-12-22 09:42:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18920 states. [2020-12-22 09:42:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18920 states to 18920 states and 24685 transitions. [2020-12-22 09:42:47,418 INFO L78 Accepts]: Start accepts. Automaton has 18920 states and 24685 transitions. Word has length 82 [2020-12-22 09:42:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:47,419 INFO L481 AbstractCegarLoop]: Abstraction has 18920 states and 24685 transitions. [2020-12-22 09:42:47,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:42:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 18920 states and 24685 transitions. [2020-12-22 09:42:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:42:47,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:47,421 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:47,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:42:47,622 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:47,623 INFO L82 PathProgramCache]: Analyzing trace with hash -895278877, now seen corresponding path program 1 times [2020-12-22 09:42:47,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:47,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606076920] [2020-12-22 09:42:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:42:47,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606076920] [2020-12-22 09:42:47,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:47,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:47,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336240744] [2020-12-22 09:42:47,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:47,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:47,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:47,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:47,719 INFO L87 Difference]: Start difference. First operand 18920 states and 24685 transitions. Second operand 6 states. [2020-12-22 09:42:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:48,605 INFO L93 Difference]: Finished difference Result 27474 states and 35791 transitions. [2020-12-22 09:42:48,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:48,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:42:48,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:48,628 INFO L225 Difference]: With dead ends: 27474 [2020-12-22 09:42:48,629 INFO L226 Difference]: Without dead ends: 10187 [2020-12-22 09:42:48,648 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 09:42:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10187 states. [2020-12-22 09:42:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10187 to 10187. [2020-12-22 09:42:49,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10187 states. [2020-12-22 09:42:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10187 states to 10187 states and 13455 transitions. [2020-12-22 09:42:49,532 INFO L78 Accepts]: Start accepts. Automaton has 10187 states and 13455 transitions. Word has length 82 [2020-12-22 09:42:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:49,532 INFO L481 AbstractCegarLoop]: Abstraction has 10187 states and 13455 transitions. [2020-12-22 09:42:49,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:49,533 INFO L276 IsEmpty]: Start isEmpty. Operand 10187 states and 13455 transitions. [2020-12-22 09:42:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:42:49,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:49,534 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:49,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:42:49,535 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:49,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1328829219, now seen corresponding path program 1 times [2020-12-22 09:42:49,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:49,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983162868] [2020-12-22 09:42:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:42:49,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983162868] [2020-12-22 09:42:49,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:49,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:49,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615731336] [2020-12-22 09:42:49,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:49,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:49,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:49,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:49,615 INFO L87 Difference]: Start difference. First operand 10187 states and 13455 transitions. Second operand 6 states. [2020-12-22 09:42:50,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:50,327 INFO L93 Difference]: Finished difference Result 16620 states and 21703 transitions. [2020-12-22 09:42:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:50,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:42:50,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:50,339 INFO L225 Difference]: With dead ends: 16620 [2020-12-22 09:42:50,339 INFO L226 Difference]: Without dead ends: 8070 [2020-12-22 09:42:50,349 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 09:42:50,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8070 states. [2020-12-22 09:42:51,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8070 to 8070. [2020-12-22 09:42:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8070 states. [2020-12-22 09:42:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8070 states to 8070 states and 10677 transitions. [2020-12-22 09:42:51,185 INFO L78 Accepts]: Start accepts. Automaton has 8070 states and 10677 transitions. Word has length 82 [2020-12-22 09:42:51,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:51,185 INFO L481 AbstractCegarLoop]: Abstraction has 8070 states and 10677 transitions. [2020-12-22 09:42:51,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 8070 states and 10677 transitions. [2020-12-22 09:42:51,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:42:51,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:51,187 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:51,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:42:51,187 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:51,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:51,188 INFO L82 PathProgramCache]: Analyzing trace with hash 2082803715, now seen corresponding path program 1 times [2020-12-22 09:42:51,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:51,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652938478] [2020-12-22 09:42:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:42:51,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652938478] [2020-12-22 09:42:51,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:51,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:51,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797830104] [2020-12-22 09:42:51,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:51,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:51,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:51,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:51,263 INFO L87 Difference]: Start difference. First operand 8070 states and 10677 transitions. Second operand 6 states. [2020-12-22 09:42:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:52,760 INFO L93 Difference]: Finished difference Result 18540 states and 24113 transitions. [2020-12-22 09:42:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:52,760 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:42:52,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:52,771 INFO L225 Difference]: With dead ends: 18540 [2020-12-22 09:42:52,772 INFO L226 Difference]: Without dead ends: 12043 [2020-12-22 09:42:52,778 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 09:42:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12043 states. [2020-12-22 09:42:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12043 to 11073. [2020-12-22 09:42:53,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11073 states. [2020-12-22 09:42:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11073 states to 11073 states and 14480 transitions. [2020-12-22 09:42:53,622 INFO L78 Accepts]: Start accepts. Automaton has 11073 states and 14480 transitions. Word has length 82 [2020-12-22 09:42:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:53,622 INFO L481 AbstractCegarLoop]: Abstraction has 11073 states and 14480 transitions. [2020-12-22 09:42:53,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 11073 states and 14480 transitions. [2020-12-22 09:42:53,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:42:53,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:53,625 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:53,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:42:53,625 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1931365342, now seen corresponding path program 1 times [2020-12-22 09:42:53,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:53,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223712951] [2020-12-22 09:42:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:53,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223712951] [2020-12-22 09:42:53,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068315726] [2020-12-22 09:42:53,917 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 09:42:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:54,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:42:54,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:54,222 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:54,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:42:54,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:42:54,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622252168] [2020-12-22 09:42:54,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:42:54,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:42:54,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:42:54,503 INFO L87 Difference]: Start difference. First operand 11073 states and 14480 transitions. Second operand 17 states. [2020-12-22 09:42:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:59,719 INFO L93 Difference]: Finished difference Result 48486 states and 61216 transitions. [2020-12-22 09:42:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:42:59,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-12-22 09:42:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:59,771 INFO L225 Difference]: With dead ends: 48486 [2020-12-22 09:42:59,771 INFO L226 Difference]: Without dead ends: 40460 [2020-12-22 09:42:59,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:42:59,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40460 states. [2020-12-22 09:43:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40460 to 25694. [2020-12-22 09:43:02,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25694 states. [2020-12-22 09:43:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25694 states to 25694 states and 32866 transitions. [2020-12-22 09:43:02,375 INFO L78 Accepts]: Start accepts. Automaton has 25694 states and 32866 transitions. Word has length 83 [2020-12-22 09:43:02,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:02,375 INFO L481 AbstractCegarLoop]: Abstraction has 25694 states and 32866 transitions. [2020-12-22 09:43:02,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:43:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 25694 states and 32866 transitions. [2020-12-22 09:43:02,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:43:02,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:02,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:02,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:43:02,593 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:02,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:02,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1033972064, now seen corresponding path program 1 times [2020-12-22 09:43:02,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:02,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584319551] [2020-12-22 09:43:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:43:02,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584319551] [2020-12-22 09:43:02,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:02,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:43:02,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875695945] [2020-12-22 09:43:02,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:02,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:02,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:02,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:02,671 INFO L87 Difference]: Start difference. First operand 25694 states and 32866 transitions. Second operand 6 states. [2020-12-22 09:43:04,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:04,720 INFO L93 Difference]: Finished difference Result 43977 states and 55838 transitions. [2020-12-22 09:43:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:43:04,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 09:43:04,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:04,742 INFO L225 Difference]: With dead ends: 43977 [2020-12-22 09:43:04,742 INFO L226 Difference]: Without dead ends: 20020 [2020-12-22 09:43:04,757 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 09:43:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20020 states. [2020-12-22 09:43:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20020 to 20020. [2020-12-22 09:43:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20020 states. [2020-12-22 09:43:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20020 states to 20020 states and 25330 transitions. [2020-12-22 09:43:07,181 INFO L78 Accepts]: Start accepts. Automaton has 20020 states and 25330 transitions. Word has length 83 [2020-12-22 09:43:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:07,182 INFO L481 AbstractCegarLoop]: Abstraction has 20020 states and 25330 transitions. [2020-12-22 09:43:07,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 20020 states and 25330 transitions. [2020-12-22 09:43:07,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:43:07,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:07,184 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:07,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:43:07,184 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:07,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2020-12-22 09:43:07,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:07,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620158919] [2020-12-22 09:43:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:09,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620158919] [2020-12-22 09:43:09,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169348412] [2020-12-22 09:43:09,005 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 09:43:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:09,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:43:09,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:43:09,696 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:43:10,033 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-12-22 09:43:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:10,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:43:10,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12] total 39 [2020-12-22 09:43:10,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125567231] [2020-12-22 09:43:10,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:43:10,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:10,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:43:10,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1380, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:43:10,826 INFO L87 Difference]: Start difference. First operand 20020 states and 25330 transitions. Second operand 39 states. [2020-12-22 09:43:11,290 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2020-12-22 09:43:12,464 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2020-12-22 09:43:12,811 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-12-22 09:43:13,076 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-22 09:43:13,355 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-12-22 09:43:13,692 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-12-22 09:43:14,016 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-22 09:43:14,454 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-12-22 09:43:14,998 WARN L197 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2020-12-22 09:43:15,668 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 100 [2020-12-22 09:43:16,304 WARN L197 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2020-12-22 09:43:16,783 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-12-22 09:43:17,225 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-12-22 09:43:17,568 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:43:18,051 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:43:18,447 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-12-22 09:43:18,798 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:43:19,273 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:43:19,543 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:43:19,880 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:43:20,372 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:43:20,826 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:43:21,199 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:43:21,618 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:43:21,932 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-12-22 09:43:22,308 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-22 09:43:22,865 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:43:23,227 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:43:23,476 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-12-22 09:43:23,960 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:43:24,309 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-22 09:43:24,636 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2020-12-22 09:43:25,050 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-12-22 09:43:25,487 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-12-22 09:43:25,739 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 09:43:26,325 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2020-12-22 09:43:26,661 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 09:43:26,904 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:43:27,171 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:43:27,759 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 09:43:28,047 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:43:28,340 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 09:43:28,767 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:43:29,221 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 09:43:29,572 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:43:30,092 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 09:43:30,707 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:43:31,922 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-12-22 09:43:32,425 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-12-22 09:43:33,305 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-12-22 09:43:33,836 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-12-22 09:43:34,215 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 09:43:34,540 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-12-22 09:43:35,026 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-12-22 09:43:35,322 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-22 09:43:35,795 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-12-22 09:43:36,369 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-12-22 09:43:36,690 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:43:37,548 WARN L197 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 91 [2020-12-22 09:43:38,118 WARN L197 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-12-22 09:43:38,553 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-12-22 09:43:38,829 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:43:39,229 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:43:39,707 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-22 09:43:40,638 WARN L197 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 114 [2020-12-22 09:43:41,020 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:43:41,518 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:43:41,890 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:43:42,881 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:43:43,588 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-12-22 09:43:45,367 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-12-22 09:43:45,945 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2020-12-22 09:43:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:46,868 INFO L93 Difference]: Finished difference Result 33924 states and 42760 transitions. [2020-12-22 09:43:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-22 09:43:46,869 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-12-22 09:43:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:46,897 INFO L225 Difference]: With dead ends: 33924 [2020-12-22 09:43:46,897 INFO L226 Difference]: Without dead ends: 26328 [2020-12-22 09:43:46,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3707 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=2385, Invalid=12867, Unknown=0, NotChecked=0, Total=15252 [2020-12-22 09:43:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26328 states. [2020-12-22 09:43:48,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26328 to 18069. [2020-12-22 09:43:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18069 states. [2020-12-22 09:43:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 22973 transitions. [2020-12-22 09:43:48,924 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 22973 transitions. Word has length 84 [2020-12-22 09:43:48,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:48,924 INFO L481 AbstractCegarLoop]: Abstraction has 18069 states and 22973 transitions. [2020-12-22 09:43:48,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:43:48,925 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 22973 transitions. [2020-12-22 09:43:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:43:48,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:48,926 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:49,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:43:49,127 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:49,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:49,128 INFO L82 PathProgramCache]: Analyzing trace with hash -179145348, now seen corresponding path program 1 times [2020-12-22 09:43:49,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:49,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703863079] [2020-12-22 09:43:49,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:49,563 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:43:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:49,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703863079] [2020-12-22 09:43:49,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623539061] [2020-12-22 09:43:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:43:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:50,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:43:50,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:43:50,524 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:43:50,891 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 33 [2020-12-22 09:43:51,396 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 09:43:51,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:43:51,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-22 09:43:51,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502768411] [2020-12-22 09:43:51,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:43:51,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:51,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:43:51,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:43:51,398 INFO L87 Difference]: Start difference. First operand 18069 states and 22973 transitions. Second operand 24 states. [2020-12-22 09:43:51,585 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:43:52,192 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:43:52,351 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 09:43:52,588 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:43:52,841 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 09:43:53,299 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 09:43:53,574 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 09:43:53,930 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:43:54,320 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 09:43:54,720 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 09:43:55,147 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 09:43:55,433 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 09:43:55,775 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-12-22 09:43:56,001 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 09:43:56,274 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 09:43:56,477 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 09:43:56,675 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 09:43:56,898 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:43:57,122 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:43:57,295 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 09:43:59,312 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:43:59,608 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:43:59,799 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:44:00,017 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:44:00,314 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:44:00,540 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:44:00,983 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-22 09:44:02,158 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:44:04,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:04,498 INFO L93 Difference]: Finished difference Result 30297 states and 38703 transitions. [2020-12-22 09:44:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 09:44:04,498 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 84 [2020-12-22 09:44:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:04,517 INFO L225 Difference]: With dead ends: 30297 [2020-12-22 09:44:04,518 INFO L226 Difference]: Without dead ends: 19428 [2020-12-22 09:44:04,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=895, Invalid=4507, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 09:44:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19428 states. [2020-12-22 09:44:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19428 to 11668. [2020-12-22 09:44:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11668 states. [2020-12-22 09:44:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11668 states to 11668 states and 15282 transitions. [2020-12-22 09:44:05,937 INFO L78 Accepts]: Start accepts. Automaton has 11668 states and 15282 transitions. Word has length 84 [2020-12-22 09:44:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:05,937 INFO L481 AbstractCegarLoop]: Abstraction has 11668 states and 15282 transitions. [2020-12-22 09:44:05,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:44:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 11668 states and 15282 transitions. [2020-12-22 09:44:05,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 09:44:05,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:05,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:06,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:44:06,153 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash -68902190, now seen corresponding path program 1 times [2020-12-22 09:44:06,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:06,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949586628] [2020-12-22 09:44:06,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:07,008 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2020-12-22 09:44:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:07,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949586628] [2020-12-22 09:44:07,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906286952] [2020-12-22 09:44:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:07,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:44:07,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:08,280 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:44:08,566 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2020-12-22 09:44:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:09,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:09,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 30 [2020-12-22 09:44:09,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113766040] [2020-12-22 09:44:09,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:44:09,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:09,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:44:09,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:44:09,179 INFO L87 Difference]: Start difference. First operand 11668 states and 15282 transitions. Second operand 30 states. [2020-12-22 09:44:09,475 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2020-12-22 09:44:09,895 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2020-12-22 09:44:10,088 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-12-22 09:44:10,338 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2020-12-22 09:44:10,838 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2020-12-22 09:44:11,370 WARN L197 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2020-12-22 09:44:12,257 WARN L197 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-12-22 09:44:12,977 WARN L197 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2020-12-22 09:44:13,703 WARN L197 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-12-22 09:44:14,065 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 09:44:14,351 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-22 09:44:14,915 WARN L197 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2020-12-22 09:44:15,658 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-12-22 09:44:16,044 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-12-22 09:44:16,655 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:44:16,940 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-12-22 09:44:17,665 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-12-22 09:44:18,758 WARN L197 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-12-22 09:44:19,306 WARN L197 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 56 [2020-12-22 09:44:19,617 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-12-22 09:44:20,147 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:44:21,246 WARN L197 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 116 DAG size of output: 87 [2020-12-22 09:44:22,290 WARN L197 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-12-22 09:44:22,930 WARN L197 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-12-22 09:44:23,817 WARN L197 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-12-22 09:44:24,618 WARN L197 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-12-22 09:44:25,625 WARN L197 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 81 [2020-12-22 09:44:26,490 WARN L197 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-12-22 09:44:27,514 WARN L197 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2020-12-22 09:44:28,509 WARN L197 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-12-22 09:44:28,977 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-12-22 09:44:29,677 WARN L197 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-12-22 09:44:30,136 WARN L197 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-12-22 09:44:30,493 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:44:31,267 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-12-22 09:44:31,659 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-12-22 09:44:31,923 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-12-22 09:44:32,245 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-12-22 09:44:32,651 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-12-22 09:44:34,179 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-12-22 09:44:35,263 WARN L197 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-12-22 09:44:35,890 WARN L197 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2020-12-22 09:44:37,014 WARN L197 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2020-12-22 09:44:38,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:38,117 INFO L93 Difference]: Finished difference Result 20472 states and 26629 transitions. [2020-12-22 09:44:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 09:44:38,119 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-12-22 09:44:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:38,134 INFO L225 Difference]: With dead ends: 20472 [2020-12-22 09:44:38,135 INFO L226 Difference]: Without dead ends: 16053 [2020-12-22 09:44:38,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=1136, Invalid=5184, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 09:44:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16053 states. [2020-12-22 09:44:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16053 to 10107. [2020-12-22 09:44:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10107 states. [2020-12-22 09:44:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 13341 transitions. [2020-12-22 09:44:39,442 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 13341 transitions. Word has length 86 [2020-12-22 09:44:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:39,442 INFO L481 AbstractCegarLoop]: Abstraction has 10107 states and 13341 transitions. [2020-12-22 09:44:39,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:44:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 13341 transitions. [2020-12-22 09:44:39,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:44:39,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:39,448 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:39,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:39,663 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2020-12-22 09:44:39,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:39,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143661027] [2020-12-22 09:44:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:40,182 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:44:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:40,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143661027] [2020-12-22 09:44:40,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334185661] [2020-12-22 09:44:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:40,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 09:44:40,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:44:41,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:41,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 09:44:41,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554404384] [2020-12-22 09:44:41,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:44:41,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:41,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:44:41,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:44:41,193 INFO L87 Difference]: Start difference. First operand 10107 states and 13341 transitions. Second operand 15 states. [2020-12-22 09:44:41,362 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 09:44:41,990 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:44:42,296 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:44:42,491 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:44:42,904 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:44:43,233 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:44:43,646 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:44:43,876 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:44:44,107 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:44:44,420 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:44:44,640 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:44:44,870 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:44:45,735 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:44:46,358 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:44:46,579 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:44:46,808 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:44:47,182 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:44:47,388 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-12-22 09:44:47,567 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:44:48,258 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:44:48,932 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-12-22 09:44:49,132 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:44:49,330 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:44:49,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:49,695 INFO L93 Difference]: Finished difference Result 22726 states and 29275 transitions. [2020-12-22 09:44:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 09:44:49,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-12-22 09:44:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:49,711 INFO L225 Difference]: With dead ends: 22726 [2020-12-22 09:44:49,711 INFO L226 Difference]: Without dead ends: 14748 [2020-12-22 09:44:49,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 09:44:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14748 states. [2020-12-22 09:44:51,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14748 to 14636. [2020-12-22 09:44:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14636 states. [2020-12-22 09:44:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14636 states to 14636 states and 18423 transitions. [2020-12-22 09:44:51,725 INFO L78 Accepts]: Start accepts. Automaton has 14636 states and 18423 transitions. Word has length 135 [2020-12-22 09:44:51,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:51,726 INFO L481 AbstractCegarLoop]: Abstraction has 14636 states and 18423 transitions. [2020-12-22 09:44:51,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 09:44:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 14636 states and 18423 transitions. [2020-12-22 09:44:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:44:51,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:51,731 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:51,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 09:44:51,947 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:51,948 INFO L82 PathProgramCache]: Analyzing trace with hash 789268438, now seen corresponding path program 1 times [2020-12-22 09:44:51,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:51,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665889702] [2020-12-22 09:44:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:52,379 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-12-22 09:44:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:52,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665889702] [2020-12-22 09:44:52,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192921466] [2020-12-22 09:44:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:52,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 09:44:52,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:53,049 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 09:44:53,689 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:44:54,081 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 29 [2020-12-22 09:44:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 20 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:54,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:54,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 09:44:54,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904762217] [2020-12-22 09:44:54,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:44:54,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:54,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:44:54,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:44:54,587 INFO L87 Difference]: Start difference. First operand 14636 states and 18423 transitions. Second operand 22 states. [2020-12-22 09:44:54,918 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 09:44:55,283 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 09:44:55,672 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:44:56,337 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 09:44:56,754 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:44:57,040 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:44:57,743 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:44:58,246 WARN L197 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-12-22 09:44:58,914 WARN L197 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:44:59,679 WARN L197 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:45:01,025 WARN L197 SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:45:02,942 WARN L197 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-12-22 09:45:04,370 WARN L197 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 106 [2020-12-22 09:45:06,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:06,694 INFO L93 Difference]: Finished difference Result 22536 states and 28039 transitions. [2020-12-22 09:45:06,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 09:45:06,697 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 136 [2020-12-22 09:45:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:06,714 INFO L225 Difference]: With dead ends: 22536 [2020-12-22 09:45:06,714 INFO L226 Difference]: Without dead ends: 16620 [2020-12-22 09:45:06,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:45:06,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16620 states. [2020-12-22 09:45:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16620 to 14636. [2020-12-22 09:45:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14636 states. [2020-12-22 09:45:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14636 states to 14636 states and 18321 transitions. [2020-12-22 09:45:09,465 INFO L78 Accepts]: Start accepts. Automaton has 14636 states and 18321 transitions. Word has length 136 [2020-12-22 09:45:09,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:09,465 INFO L481 AbstractCegarLoop]: Abstraction has 14636 states and 18321 transitions. [2020-12-22 09:45:09,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:45:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 14636 states and 18321 transitions. [2020-12-22 09:45:09,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:45:09,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:09,469 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:09,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:09,671 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:09,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:09,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1426411414, now seen corresponding path program 1 times [2020-12-22 09:45:09,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:09,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317475688] [2020-12-22 09:45:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 33 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:10,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317475688] [2020-12-22 09:45:10,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961689220] [2020-12-22 09:45:10,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:10,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:45:10,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:11,351 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:45:11,428 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:11,789 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:12,335 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:13,393 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:14,658 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:15,837 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:17,425 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:19,354 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:21,155 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:23,313 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:24,918 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:26,916 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:28,895 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:31,143 INFO L757 QuantifierPusher]: Run 140 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:32,765 INFO L757 QuantifierPusher]: Run 150 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:34,836 INFO L757 QuantifierPusher]: Run 160 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:37,144 INFO L757 QuantifierPusher]: Run 170 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:39,394 INFO L757 QuantifierPusher]: Run 180 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:42,702 INFO L757 QuantifierPusher]: Run 190 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:46,702 INFO L757 QuantifierPusher]: Run 200 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:51,164 INFO L757 QuantifierPusher]: Run 210 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:45:56,543 INFO L757 QuantifierPusher]: Run 220 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.