/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/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:04:00,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:04:00,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:04:00,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:04:00,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:04:00,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:04:00,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:04:00,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:04:00,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:04:00,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:04:00,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:04:00,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:04:00,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:04:00,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:04:00,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:04:00,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:04:00,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:04:00,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:04:00,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:04:00,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:04:00,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:04:00,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:04:00,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:04:00,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:04:00,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:04:00,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:04:00,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:04:00,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:04:00,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:04:00,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:04:00,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:04:00,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:04:00,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:04:00,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:04:00,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:04:00,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:04:00,492 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:04:00,520 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:04:00,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:04:00,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:04:00,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:04:00,523 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:04:00,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:04:00,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:04:00,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:04:00,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:04:00,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:04:00,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:04:00,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:04:00,524 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:04:00,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:04:00,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:04:00,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:04:00,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:04:00,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:04:00,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:04:00,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:04:00,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:04:00,527 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:04:00,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:04:00,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:04:00,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:04:00,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:04:00,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:04:00,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:04:00,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:04:00,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:04:00,935 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:04:00,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 09:04:01,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7602fca75/c613122302144f399d930d00a27b1f56/FLAGb09b62450 [2020-12-22 09:04:01,768 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:04:01,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 09:04:01,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7602fca75/c613122302144f399d930d00a27b1f56/FLAGb09b62450 [2020-12-22 09:04:02,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7602fca75/c613122302144f399d930d00a27b1f56 [2020-12-22 09:04:02,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:04:02,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:04:02,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:04:02,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:04:02,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:04:02,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:04:02" (1/1) ... [2020-12-22 09:04:02,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748e942f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:02, skipping insertion in model container [2020-12-22 09:04:02,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:04:02" (1/1) ... [2020-12-22 09:04:02,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:04:02,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:04:02,713 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/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[15138,15151] [2020-12-22 09:04:02,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:04:02,806 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:04:03,003 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/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[15138,15151] [2020-12-22 09:04:03,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:04:03,131 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:04:03,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:03 WrapperNode [2020-12-22 09:04:03,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:04:03,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:04:03,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:04:03,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:04:03,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:03" (1/1) ... [2020-12-22 09:04:03,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:03" (1/1) ... [2020-12-22 09:04:03,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:04:03,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:04:03,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:04:03,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:04:03,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:03" (1/1) ... [2020-12-22 09:04:03,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:03" (1/1) ... [2020-12-22 09:04:03,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:03" (1/1) ... [2020-12-22 09:04:03,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:03" (1/1) ... [2020-12-22 09:04:03,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:03" (1/1) ... [2020-12-22 09:04:03,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:03" (1/1) ... [2020-12-22 09:04:03,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:03" (1/1) ... [2020-12-22 09:04:03,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:04:03,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:04:03,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:04:03,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:04:03,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:03" (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 09:04:03,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:04:03,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:04:03,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:04:03,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:04:05,282 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:04:05,282 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:04:05,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:04:05 BoogieIcfgContainer [2020-12-22 09:04:05,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:04:05,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:04:05,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:04:05,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:04:05,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:04:02" (1/3) ... [2020-12-22 09:04:05,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abd0de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:04:05, skipping insertion in model container [2020-12-22 09:04:05,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:03" (2/3) ... [2020-12-22 09:04:05,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abd0de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:04:05, skipping insertion in model container [2020-12-22 09:04:05,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:04:05" (3/3) ... [2020-12-22 09:04:05,294 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 09:04:05,301 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:04:05,307 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:04:05,327 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:04:05,357 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:04:05,357 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:04:05,357 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:04:05,357 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:04:05,358 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:04:05,358 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:04:05,358 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:04:05,358 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:04:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states. [2020-12-22 09:04:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 09:04:05,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:05,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:05,397 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:05,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:05,404 INFO L82 PathProgramCache]: Analyzing trace with hash 731422854, now seen corresponding path program 1 times [2020-12-22 09:04:05,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:05,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646007123] [2020-12-22 09:04:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:06,430 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 09:04:06,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646007123] [2020-12-22 09:04:06,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:06,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:06,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37760412] [2020-12-22 09:04:06,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:06,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:06,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:06,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:06,456 INFO L87 Difference]: Start difference. First operand 324 states. Second operand 4 states. [2020-12-22 09:04:06,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:06,764 INFO L93 Difference]: Finished difference Result 944 states and 1672 transitions. [2020-12-22 09:04:06,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:06,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-12-22 09:04:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:06,792 INFO L225 Difference]: With dead ends: 944 [2020-12-22 09:04:06,793 INFO L226 Difference]: Without dead ends: 623 [2020-12-22 09:04:06,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:06,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-12-22 09:04:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 621. [2020-12-22 09:04:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-12-22 09:04:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 904 transitions. [2020-12-22 09:04:06,939 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 904 transitions. Word has length 150 [2020-12-22 09:04:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:06,940 INFO L481 AbstractCegarLoop]: Abstraction has 621 states and 904 transitions. [2020-12-22 09:04:06,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 904 transitions. [2020-12-22 09:04:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 09:04:06,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:06,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:06,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:04:06,947 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:06,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:06,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1954150630, now seen corresponding path program 1 times [2020-12-22 09:04:06,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:06,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791243914] [2020-12-22 09:04:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:07,082 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 09:04:07,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791243914] [2020-12-22 09:04:07,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:07,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:07,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725999716] [2020-12-22 09:04:07,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:07,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:07,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:07,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:07,087 INFO L87 Difference]: Start difference. First operand 621 states and 904 transitions. Second operand 3 states. [2020-12-22 09:04:07,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:07,165 INFO L93 Difference]: Finished difference Result 1825 states and 2650 transitions. [2020-12-22 09:04:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:07,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 151 [2020-12-22 09:04:07,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:07,174 INFO L225 Difference]: With dead ends: 1825 [2020-12-22 09:04:07,174 INFO L226 Difference]: Without dead ends: 1232 [2020-12-22 09:04:07,177 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 09:04:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2020-12-22 09:04:07,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 623. [2020-12-22 09:04:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2020-12-22 09:04:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 906 transitions. [2020-12-22 09:04:07,230 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 906 transitions. Word has length 151 [2020-12-22 09:04:07,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:07,231 INFO L481 AbstractCegarLoop]: Abstraction has 623 states and 906 transitions. [2020-12-22 09:04:07,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:07,231 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 906 transitions. [2020-12-22 09:04:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 09:04:07,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:07,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:07,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:04:07,235 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:07,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:07,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1787410567, now seen corresponding path program 1 times [2020-12-22 09:04:07,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:07,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543781728] [2020-12-22 09:04:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:07,570 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 09:04:07,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543781728] [2020-12-22 09:04:07,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:07,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:07,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200532032] [2020-12-22 09:04:07,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:07,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:07,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:07,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:07,574 INFO L87 Difference]: Start difference. First operand 623 states and 906 transitions. Second operand 4 states. [2020-12-22 09:04:07,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:07,783 INFO L93 Difference]: Finished difference Result 1779 states and 2570 transitions. [2020-12-22 09:04:07,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:07,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-12-22 09:04:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:07,791 INFO L225 Difference]: With dead ends: 1779 [2020-12-22 09:04:07,792 INFO L226 Difference]: Without dead ends: 1186 [2020-12-22 09:04:07,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:07,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2020-12-22 09:04:07,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1184. [2020-12-22 09:04:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2020-12-22 09:04:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1696 transitions. [2020-12-22 09:04:07,869 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1696 transitions. Word has length 152 [2020-12-22 09:04:07,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:07,875 INFO L481 AbstractCegarLoop]: Abstraction has 1184 states and 1696 transitions. [2020-12-22 09:04:07,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:07,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1696 transitions. [2020-12-22 09:04:07,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 09:04:07,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:07,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:07,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:04:07,884 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash -672172421, now seen corresponding path program 1 times [2020-12-22 09:04:07,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:07,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839969668] [2020-12-22 09:04:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:07,972 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 09:04:07,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839969668] [2020-12-22 09:04:07,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:07,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:07,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691361587] [2020-12-22 09:04:07,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:07,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:07,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:07,980 INFO L87 Difference]: Start difference. First operand 1184 states and 1696 transitions. Second operand 3 states. [2020-12-22 09:04:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:08,170 INFO L93 Difference]: Finished difference Result 3476 states and 4968 transitions. [2020-12-22 09:04:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:08,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2020-12-22 09:04:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:08,185 INFO L225 Difference]: With dead ends: 3476 [2020-12-22 09:04:08,185 INFO L226 Difference]: Without dead ends: 2336 [2020-12-22 09:04:08,189 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 09:04:08,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2020-12-22 09:04:08,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1188. [2020-12-22 09:04:08,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1188 states. [2020-12-22 09:04:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1700 transitions. [2020-12-22 09:04:08,335 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1700 transitions. Word has length 153 [2020-12-22 09:04:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:08,336 INFO L481 AbstractCegarLoop]: Abstraction has 1188 states and 1700 transitions. [2020-12-22 09:04:08,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1700 transitions. [2020-12-22 09:04:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 09:04:08,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:08,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:08,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:04:08,342 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:08,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:08,343 INFO L82 PathProgramCache]: Analyzing trace with hash 540119633, now seen corresponding path program 1 times [2020-12-22 09:04:08,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:08,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620971758] [2020-12-22 09:04:08,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:08,492 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 09:04:08,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620971758] [2020-12-22 09:04:08,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:08,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:08,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97119049] [2020-12-22 09:04:08,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:08,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:08,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:08,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:08,496 INFO L87 Difference]: Start difference. First operand 1188 states and 1700 transitions. Second operand 3 states. [2020-12-22 09:04:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:08,777 INFO L93 Difference]: Finished difference Result 3124 states and 4492 transitions. [2020-12-22 09:04:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:08,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2020-12-22 09:04:08,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:08,815 INFO L225 Difference]: With dead ends: 3124 [2020-12-22 09:04:08,815 INFO L226 Difference]: Without dead ends: 2272 [2020-12-22 09:04:08,818 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 09:04:08,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2020-12-22 09:04:09,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 2270. [2020-12-22 09:04:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2270 states. [2020-12-22 09:04:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 3208 transitions. [2020-12-22 09:04:09,083 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 3208 transitions. Word has length 154 [2020-12-22 09:04:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:09,084 INFO L481 AbstractCegarLoop]: Abstraction has 2270 states and 3208 transitions. [2020-12-22 09:04:09,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 3208 transitions. [2020-12-22 09:04:09,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 09:04:09,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:09,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:09,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:04:09,090 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:09,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:09,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1047550958, now seen corresponding path program 1 times [2020-12-22 09:04:09,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:09,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415947349] [2020-12-22 09:04:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:09,402 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 09:04:09,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415947349] [2020-12-22 09:04:09,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:09,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:04:09,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166900130] [2020-12-22 09:04:09,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:04:09,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:09,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:04:09,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:09,407 INFO L87 Difference]: Start difference. First operand 2270 states and 3208 transitions. Second operand 5 states. [2020-12-22 09:04:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:09,897 INFO L93 Difference]: Finished difference Result 6318 states and 8929 transitions. [2020-12-22 09:04:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:09,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2020-12-22 09:04:09,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:09,922 INFO L225 Difference]: With dead ends: 6318 [2020-12-22 09:04:09,923 INFO L226 Difference]: Without dead ends: 4085 [2020-12-22 09:04:09,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:09,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2020-12-22 09:04:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 4083. [2020-12-22 09:04:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4083 states. [2020-12-22 09:04:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4083 states to 4083 states and 5722 transitions. [2020-12-22 09:04:10,340 INFO L78 Accepts]: Start accepts. Automaton has 4083 states and 5722 transitions. Word has length 154 [2020-12-22 09:04:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:10,340 INFO L481 AbstractCegarLoop]: Abstraction has 4083 states and 5722 transitions. [2020-12-22 09:04:10,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:04:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4083 states and 5722 transitions. [2020-12-22 09:04:10,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 09:04:10,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:10,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:10,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:04:10,349 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:10,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1357265656, now seen corresponding path program 1 times [2020-12-22 09:04:10,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:10,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858741889] [2020-12-22 09:04:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:10,575 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 09:04:10,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858741889] [2020-12-22 09:04:10,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:10,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:10,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547977390] [2020-12-22 09:04:10,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:10,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:10,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:10,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:10,579 INFO L87 Difference]: Start difference. First operand 4083 states and 5722 transitions. Second operand 4 states. [2020-12-22 09:04:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:11,036 INFO L93 Difference]: Finished difference Result 8434 states and 11732 transitions. [2020-12-22 09:04:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:11,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-12-22 09:04:11,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:11,060 INFO L225 Difference]: With dead ends: 8434 [2020-12-22 09:04:11,061 INFO L226 Difference]: Without dead ends: 4468 [2020-12-22 09:04:11,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:11,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4468 states. [2020-12-22 09:04:11,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4468 to 4311. [2020-12-22 09:04:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4311 states. [2020-12-22 09:04:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4311 states to 4311 states and 5978 transitions. [2020-12-22 09:04:11,434 INFO L78 Accepts]: Start accepts. Automaton has 4311 states and 5978 transitions. Word has length 154 [2020-12-22 09:04:11,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:11,435 INFO L481 AbstractCegarLoop]: Abstraction has 4311 states and 5978 transitions. [2020-12-22 09:04:11,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4311 states and 5978 transitions. [2020-12-22 09:04:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 09:04:11,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:11,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:11,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:04:11,445 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:11,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1903211100, now seen corresponding path program 1 times [2020-12-22 09:04:11,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:11,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489346375] [2020-12-22 09:04:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:11,535 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 09:04:11,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489346375] [2020-12-22 09:04:11,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:11,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:11,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136437462] [2020-12-22 09:04:11,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:11,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:11,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:11,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:11,539 INFO L87 Difference]: Start difference. First operand 4311 states and 5978 transitions. Second operand 3 states. [2020-12-22 09:04:12,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:12,056 INFO L93 Difference]: Finished difference Result 12199 states and 16992 transitions. [2020-12-22 09:04:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:12,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 155 [2020-12-22 09:04:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:12,098 INFO L225 Difference]: With dead ends: 12199 [2020-12-22 09:04:12,098 INFO L226 Difference]: Without dead ends: 8497 [2020-12-22 09:04:12,105 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 09:04:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8497 states. [2020-12-22 09:04:12,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8497 to 4327. [2020-12-22 09:04:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4327 states. [2020-12-22 09:04:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 5994 transitions. [2020-12-22 09:04:12,484 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 5994 transitions. Word has length 155 [2020-12-22 09:04:12,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:12,484 INFO L481 AbstractCegarLoop]: Abstraction has 4327 states and 5994 transitions. [2020-12-22 09:04:12,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 5994 transitions. [2020-12-22 09:04:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 09:04:12,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:12,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:12,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:04:12,495 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash -347339255, now seen corresponding path program 1 times [2020-12-22 09:04:12,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:12,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922265638] [2020-12-22 09:04:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:12,718 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 09:04:12,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922265638] [2020-12-22 09:04:12,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:12,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:12,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839722332] [2020-12-22 09:04:12,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:12,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:12,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:12,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:12,722 INFO L87 Difference]: Start difference. First operand 4327 states and 5994 transitions. Second operand 4 states. [2020-12-22 09:04:13,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:13,143 INFO L93 Difference]: Finished difference Result 8644 states and 11974 transitions. [2020-12-22 09:04:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:13,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2020-12-22 09:04:13,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:13,165 INFO L225 Difference]: With dead ends: 8644 [2020-12-22 09:04:13,165 INFO L226 Difference]: Without dead ends: 4325 [2020-12-22 09:04:13,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:13,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4325 states. [2020-12-22 09:04:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4325 to 4325. [2020-12-22 09:04:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4325 states. [2020-12-22 09:04:13,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4325 states to 4325 states and 5990 transitions. [2020-12-22 09:04:13,501 INFO L78 Accepts]: Start accepts. Automaton has 4325 states and 5990 transitions. Word has length 156 [2020-12-22 09:04:13,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:13,501 INFO L481 AbstractCegarLoop]: Abstraction has 4325 states and 5990 transitions. [2020-12-22 09:04:13,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:13,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4325 states and 5990 transitions. [2020-12-22 09:04:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 09:04:13,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:13,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:13,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:04:13,511 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:13,511 INFO L82 PathProgramCache]: Analyzing trace with hash 681641518, now seen corresponding path program 1 times [2020-12-22 09:04:13,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:13,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496804086] [2020-12-22 09:04:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:13,687 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 09:04:13,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496804086] [2020-12-22 09:04:13,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:13,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:13,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479135659] [2020-12-22 09:04:13,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:13,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:13,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:13,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:13,691 INFO L87 Difference]: Start difference. First operand 4325 states and 5990 transitions. Second operand 3 states. [2020-12-22 09:04:14,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:14,273 INFO L93 Difference]: Finished difference Result 9492 states and 13249 transitions. [2020-12-22 09:04:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:14,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2020-12-22 09:04:14,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:14,291 INFO L225 Difference]: With dead ends: 9492 [2020-12-22 09:04:14,292 INFO L226 Difference]: Without dead ends: 6394 [2020-12-22 09:04:14,299 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 09:04:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6394 states. [2020-12-22 09:04:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6394 to 6392. [2020-12-22 09:04:14,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6392 states. [2020-12-22 09:04:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6392 states to 6392 states and 8711 transitions. [2020-12-22 09:04:14,865 INFO L78 Accepts]: Start accepts. Automaton has 6392 states and 8711 transitions. Word has length 156 [2020-12-22 09:04:14,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:14,865 INFO L481 AbstractCegarLoop]: Abstraction has 6392 states and 8711 transitions. [2020-12-22 09:04:14,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:14,866 INFO L276 IsEmpty]: Start isEmpty. Operand 6392 states and 8711 transitions. [2020-12-22 09:04:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 09:04:14,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:14,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:14,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:04:14,878 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:14,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:14,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1703352107, now seen corresponding path program 1 times [2020-12-22 09:04:14,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:14,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528352286] [2020-12-22 09:04:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:14,965 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 09:04:14,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528352286] [2020-12-22 09:04:14,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:14,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:14,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925097925] [2020-12-22 09:04:14,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:14,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:14,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:14,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:14,969 INFO L87 Difference]: Start difference. First operand 6392 states and 8711 transitions. Second operand 3 states. [2020-12-22 09:04:15,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:15,605 INFO L93 Difference]: Finished difference Result 13132 states and 18577 transitions. [2020-12-22 09:04:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:15,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2020-12-22 09:04:15,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:15,624 INFO L225 Difference]: With dead ends: 13132 [2020-12-22 09:04:15,625 INFO L226 Difference]: Without dead ends: 7962 [2020-12-22 09:04:15,634 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 09:04:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7962 states. [2020-12-22 09:04:16,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7962 to 7864. [2020-12-22 09:04:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7864 states. [2020-12-22 09:04:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7864 states to 7864 states and 11047 transitions. [2020-12-22 09:04:16,239 INFO L78 Accepts]: Start accepts. Automaton has 7864 states and 11047 transitions. Word has length 157 [2020-12-22 09:04:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:16,240 INFO L481 AbstractCegarLoop]: Abstraction has 7864 states and 11047 transitions. [2020-12-22 09:04:16,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 7864 states and 11047 transitions. [2020-12-22 09:04:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 09:04:16,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:16,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:16,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:04:16,252 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:16,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1332410921, now seen corresponding path program 1 times [2020-12-22 09:04:16,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:16,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282812916] [2020-12-22 09:04:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:16,578 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 09:04:16,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282812916] [2020-12-22 09:04:16,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:16,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:04:16,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223872496] [2020-12-22 09:04:16,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:04:16,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:16,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:04:16,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:04:16,582 INFO L87 Difference]: Start difference. First operand 7864 states and 11047 transitions. Second operand 8 states. [2020-12-22 09:04:19,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:19,410 INFO L93 Difference]: Finished difference Result 21257 states and 31470 transitions. [2020-12-22 09:04:19,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 09:04:19,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 160 [2020-12-22 09:04:19,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:19,454 INFO L225 Difference]: With dead ends: 21257 [2020-12-22 09:04:19,454 INFO L226 Difference]: Without dead ends: 15606 [2020-12-22 09:04:19,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:04:19,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-12-22 09:04:20,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 9376. [2020-12-22 09:04:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9376 states. [2020-12-22 09:04:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9376 states to 9376 states and 13231 transitions. [2020-12-22 09:04:20,432 INFO L78 Accepts]: Start accepts. Automaton has 9376 states and 13231 transitions. Word has length 160 [2020-12-22 09:04:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:20,432 INFO L481 AbstractCegarLoop]: Abstraction has 9376 states and 13231 transitions. [2020-12-22 09:04:20,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:04:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 9376 states and 13231 transitions. [2020-12-22 09:04:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 09:04:20,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:20,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:20,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:04:20,444 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash 341763621, now seen corresponding path program 1 times [2020-12-22 09:04:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:20,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171486349] [2020-12-22 09:04:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:20,635 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 09:04:20,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171486349] [2020-12-22 09:04:20,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:20,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:20,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194503261] [2020-12-22 09:04:20,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:20,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:20,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:20,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:20,638 INFO L87 Difference]: Start difference. First operand 9376 states and 13231 transitions. Second operand 4 states. [2020-12-22 09:04:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:22,006 INFO L93 Difference]: Finished difference Result 23981 states and 34093 transitions. [2020-12-22 09:04:22,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:22,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 09:04:22,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:22,042 INFO L225 Difference]: With dead ends: 23981 [2020-12-22 09:04:22,043 INFO L226 Difference]: Without dead ends: 14959 [2020-12-22 09:04:22,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:22,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14959 states. [2020-12-22 09:04:23,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14959 to 14957. [2020-12-22 09:04:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14957 states. [2020-12-22 09:04:23,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14957 states to 14957 states and 21070 transitions. [2020-12-22 09:04:23,308 INFO L78 Accepts]: Start accepts. Automaton has 14957 states and 21070 transitions. Word has length 160 [2020-12-22 09:04:23,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:23,308 INFO L481 AbstractCegarLoop]: Abstraction has 14957 states and 21070 transitions. [2020-12-22 09:04:23,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:23,308 INFO L276 IsEmpty]: Start isEmpty. Operand 14957 states and 21070 transitions. [2020-12-22 09:04:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 09:04:23,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:23,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:23,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:04:23,325 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:23,326 INFO L82 PathProgramCache]: Analyzing trace with hash -247303654, now seen corresponding path program 1 times [2020-12-22 09:04:23,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:23,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993179469] [2020-12-22 09:04:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:23,523 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 09:04:23,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993179469] [2020-12-22 09:04:23,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:23,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:23,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69954955] [2020-12-22 09:04:23,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:23,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:23,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:23,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:23,525 INFO L87 Difference]: Start difference. First operand 14957 states and 21070 transitions. Second operand 4 states. [2020-12-22 09:04:24,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:24,692 INFO L93 Difference]: Finished difference Result 23821 states and 33724 transitions. [2020-12-22 09:04:24,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:24,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2020-12-22 09:04:24,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:24,718 INFO L225 Difference]: With dead ends: 23821 [2020-12-22 09:04:24,718 INFO L226 Difference]: Without dead ends: 12165 [2020-12-22 09:04:24,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:24,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12165 states. [2020-12-22 09:04:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12165 to 12165. [2020-12-22 09:04:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12165 states. [2020-12-22 09:04:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12165 states to 12165 states and 17047 transitions. [2020-12-22 09:04:25,777 INFO L78 Accepts]: Start accepts. Automaton has 12165 states and 17047 transitions. Word has length 162 [2020-12-22 09:04:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:25,777 INFO L481 AbstractCegarLoop]: Abstraction has 12165 states and 17047 transitions. [2020-12-22 09:04:25,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 12165 states and 17047 transitions. [2020-12-22 09:04:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:04:25,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:25,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:25,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:04:25,789 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:25,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:25,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1747884219, now seen corresponding path program 1 times [2020-12-22 09:04:25,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:25,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553917162] [2020-12-22 09:04:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:26,042 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 09:04:26,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553917162] [2020-12-22 09:04:26,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:26,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:26,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165672024] [2020-12-22 09:04:26,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:26,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:26,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:26,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:26,045 INFO L87 Difference]: Start difference. First operand 12165 states and 17047 transitions. Second operand 4 states. [2020-12-22 09:04:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:27,864 INFO L93 Difference]: Finished difference Result 28477 states and 41489 transitions. [2020-12-22 09:04:27,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:27,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2020-12-22 09:04:27,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:27,896 INFO L225 Difference]: With dead ends: 28477 [2020-12-22 09:04:27,897 INFO L226 Difference]: Without dead ends: 21507 [2020-12-22 09:04:27,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21507 states. [2020-12-22 09:04:29,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21507 to 21505. [2020-12-22 09:04:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21505 states. [2020-12-22 09:04:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21505 states to 21505 states and 30595 transitions. [2020-12-22 09:04:29,433 INFO L78 Accepts]: Start accepts. Automaton has 21505 states and 30595 transitions. Word has length 166 [2020-12-22 09:04:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:29,434 INFO L481 AbstractCegarLoop]: Abstraction has 21505 states and 30595 transitions. [2020-12-22 09:04:29,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 21505 states and 30595 transitions. [2020-12-22 09:04:29,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:04:29,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:29,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:29,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:04:29,450 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1264928814, now seen corresponding path program 1 times [2020-12-22 09:04:29,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:29,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923585651] [2020-12-22 09:04:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:29,656 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 09:04:29,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923585651] [2020-12-22 09:04:29,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:29,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:29,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5764955] [2020-12-22 09:04:29,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:29,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:29,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:29,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:29,661 INFO L87 Difference]: Start difference. First operand 21505 states and 30595 transitions. Second operand 4 states. [2020-12-22 09:04:31,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:31,071 INFO L93 Difference]: Finished difference Result 36044 states and 51188 transitions. [2020-12-22 09:04:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:31,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2020-12-22 09:04:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:31,096 INFO L225 Difference]: With dead ends: 36044 [2020-12-22 09:04:31,096 INFO L226 Difference]: Without dead ends: 14609 [2020-12-22 09:04:31,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14609 states. [2020-12-22 09:04:32,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14609 to 14609. [2020-12-22 09:04:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14609 states. [2020-12-22 09:04:32,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14609 states to 14609 states and 20679 transitions. [2020-12-22 09:04:32,374 INFO L78 Accepts]: Start accepts. Automaton has 14609 states and 20679 transitions. Word has length 166 [2020-12-22 09:04:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:32,375 INFO L481 AbstractCegarLoop]: Abstraction has 14609 states and 20679 transitions. [2020-12-22 09:04:32,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:32,375 INFO L276 IsEmpty]: Start isEmpty. Operand 14609 states and 20679 transitions. [2020-12-22 09:04:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 09:04:32,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:32,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:32,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:04:32,385 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:32,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:32,386 INFO L82 PathProgramCache]: Analyzing trace with hash -68040980, now seen corresponding path program 1 times [2020-12-22 09:04:32,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:32,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202796436] [2020-12-22 09:04:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:32,468 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 09:04:32,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202796436] [2020-12-22 09:04:32,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:32,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:32,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513903350] [2020-12-22 09:04:32,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:32,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:32,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:32,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:32,471 INFO L87 Difference]: Start difference. First operand 14609 states and 20679 transitions. Second operand 3 states. [2020-12-22 09:04:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:34,177 INFO L93 Difference]: Finished difference Result 37738 states and 54497 transitions. [2020-12-22 09:04:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:34,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2020-12-22 09:04:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:34,204 INFO L225 Difference]: With dead ends: 37738 [2020-12-22 09:04:34,205 INFO L226 Difference]: Without dead ends: 24151 [2020-12-22 09:04:34,224 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 09:04:34,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24151 states. [2020-12-22 09:04:35,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24151 to 21851. [2020-12-22 09:04:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21851 states. [2020-12-22 09:04:35,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21851 states to 21851 states and 31867 transitions. [2020-12-22 09:04:35,928 INFO L78 Accepts]: Start accepts. Automaton has 21851 states and 31867 transitions. Word has length 168 [2020-12-22 09:04:35,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:35,929 INFO L481 AbstractCegarLoop]: Abstraction has 21851 states and 31867 transitions. [2020-12-22 09:04:35,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:35,929 INFO L276 IsEmpty]: Start isEmpty. Operand 21851 states and 31867 transitions. [2020-12-22 09:04:35,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 09:04:35,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:35,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:35,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:04:35,936 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:35,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1403451150, now seen corresponding path program 1 times [2020-12-22 09:04:35,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:35,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255700646] [2020-12-22 09:04:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:36,028 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 09:04:36,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255700646] [2020-12-22 09:04:36,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:36,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:36,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462529564] [2020-12-22 09:04:36,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:36,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:36,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:36,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:36,031 INFO L87 Difference]: Start difference. First operand 21851 states and 31867 transitions. Second operand 3 states. [2020-12-22 09:04:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:39,017 INFO L93 Difference]: Finished difference Result 52906 states and 78194 transitions. [2020-12-22 09:04:39,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:39,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-12-22 09:04:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:39,061 INFO L225 Difference]: With dead ends: 52906 [2020-12-22 09:04:39,061 INFO L226 Difference]: Without dead ends: 35233 [2020-12-22 09:04:39,083 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 09:04:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35233 states. [2020-12-22 09:04:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35233 to 33091. [2020-12-22 09:04:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33091 states. [2020-12-22 09:04:42,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33091 states to 33091 states and 49009 transitions. [2020-12-22 09:04:42,090 INFO L78 Accepts]: Start accepts. Automaton has 33091 states and 49009 transitions. Word has length 171 [2020-12-22 09:04:42,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:42,090 INFO L481 AbstractCegarLoop]: Abstraction has 33091 states and 49009 transitions. [2020-12-22 09:04:42,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 33091 states and 49009 transitions. [2020-12-22 09:04:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 09:04:42,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:42,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:42,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:04:42,098 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:42,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1362784471, now seen corresponding path program 1 times [2020-12-22 09:04:42,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:42,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751289551] [2020-12-22 09:04:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:42,283 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 09:04:42,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751289551] [2020-12-22 09:04:42,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:42,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:42,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445610003] [2020-12-22 09:04:42,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:42,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:42,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:42,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:42,285 INFO L87 Difference]: Start difference. First operand 33091 states and 49009 transitions. Second operand 4 states. [2020-12-22 09:04:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:45,260 INFO L93 Difference]: Finished difference Result 57736 states and 85419 transitions. [2020-12-22 09:04:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:45,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2020-12-22 09:04:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:45,298 INFO L225 Difference]: With dead ends: 57736 [2020-12-22 09:04:45,298 INFO L226 Difference]: Without dead ends: 33081 [2020-12-22 09:04:45,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33081 states. [2020-12-22 09:04:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33081 to 33081. [2020-12-22 09:04:48,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33081 states. [2020-12-22 09:04:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33081 states to 33081 states and 48994 transitions. [2020-12-22 09:04:48,273 INFO L78 Accepts]: Start accepts. Automaton has 33081 states and 48994 transitions. Word has length 173 [2020-12-22 09:04:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:48,273 INFO L481 AbstractCegarLoop]: Abstraction has 33081 states and 48994 transitions. [2020-12-22 09:04:48,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 33081 states and 48994 transitions. [2020-12-22 09:04:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 09:04:48,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:48,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:48,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:04:48,279 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:48,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:48,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1128113098, now seen corresponding path program 1 times [2020-12-22 09:04:48,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:48,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141611889] [2020-12-22 09:04:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:48,547 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 09:04:48,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141611889] [2020-12-22 09:04:48,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:48,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:04:48,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277850817] [2020-12-22 09:04:48,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:04:48,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:48,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:04:48,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:48,549 INFO L87 Difference]: Start difference. First operand 33081 states and 48994 transitions. Second operand 5 states. [2020-12-22 09:04:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:51,600 INFO L93 Difference]: Finished difference Result 63182 states and 93572 transitions. [2020-12-22 09:04:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:51,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2020-12-22 09:04:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:51,653 INFO L225 Difference]: With dead ends: 63182 [2020-12-22 09:04:51,654 INFO L226 Difference]: Without dead ends: 30356 [2020-12-22 09:04:51,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:51,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30356 states. [2020-12-22 09:04:54,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30356 to 30199. [2020-12-22 09:04:54,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30199 states. [2020-12-22 09:04:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30199 states to 30199 states and 44670 transitions. [2020-12-22 09:04:54,488 INFO L78 Accepts]: Start accepts. Automaton has 30199 states and 44670 transitions. Word has length 173 [2020-12-22 09:04:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:54,489 INFO L481 AbstractCegarLoop]: Abstraction has 30199 states and 44670 transitions. [2020-12-22 09:04:54,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:04:54,489 INFO L276 IsEmpty]: Start isEmpty. Operand 30199 states and 44670 transitions. [2020-12-22 09:04:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 09:04:54,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:54,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:54,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:04:54,496 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:54,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:54,497 INFO L82 PathProgramCache]: Analyzing trace with hash -268733951, now seen corresponding path program 1 times [2020-12-22 09:04:54,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:54,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438166269] [2020-12-22 09:04:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:54,743 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 09:04:54,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438166269] [2020-12-22 09:04:54,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:54,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:04:54,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571659778] [2020-12-22 09:04:54,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:04:54,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:54,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:04:54,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:04:54,746 INFO L87 Difference]: Start difference. First operand 30199 states and 44670 transitions. Second operand 6 states. [2020-12-22 09:05:00,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:00,390 INFO L93 Difference]: Finished difference Result 84833 states and 126849 transitions. [2020-12-22 09:05:00,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:05:00,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2020-12-22 09:05:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:00,473 INFO L225 Difference]: With dead ends: 84833 [2020-12-22 09:05:00,473 INFO L226 Difference]: Without dead ends: 55882 [2020-12-22 09:05:00,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:05:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55882 states. [2020-12-22 09:05:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55882 to 43532. [2020-12-22 09:05:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43532 states. [2020-12-22 09:05:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43532 states to 43532 states and 64405 transitions. [2020-12-22 09:05:04,933 INFO L78 Accepts]: Start accepts. Automaton has 43532 states and 64405 transitions. Word has length 176 [2020-12-22 09:05:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:04,933 INFO L481 AbstractCegarLoop]: Abstraction has 43532 states and 64405 transitions. [2020-12-22 09:05:04,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:05:04,933 INFO L276 IsEmpty]: Start isEmpty. Operand 43532 states and 64405 transitions. [2020-12-22 09:05:04,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 09:05:04,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:04,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:04,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:05:04,939 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:04,939 INFO L82 PathProgramCache]: Analyzing trace with hash 693497478, now seen corresponding path program 1 times [2020-12-22 09:05:04,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:04,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265567468] [2020-12-22 09:05:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:05,211 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 09:05:05,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265567468] [2020-12-22 09:05:05,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:05,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:05:05,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225641536] [2020-12-22 09:05:05,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 09:05:05,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:05,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 09:05:05,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:05:05,214 INFO L87 Difference]: Start difference. First operand 43532 states and 64405 transitions. Second operand 9 states. [2020-12-22 09:05:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:27,751 INFO L93 Difference]: Finished difference Result 247537 states and 365612 transitions. [2020-12-22 09:05:27,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 09:05:27,754 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 176 [2020-12-22 09:05:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:28,323 INFO L225 Difference]: With dead ends: 247537 [2020-12-22 09:05:28,324 INFO L226 Difference]: Without dead ends: 205602 [2020-12-22 09:05:28,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2020-12-22 09:05:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205602 states. [2020-12-22 09:05:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205602 to 96716. [2020-12-22 09:05:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96716 states. [2020-12-22 09:05:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96716 states to 96716 states and 143008 transitions. [2020-12-22 09:05:40,111 INFO L78 Accepts]: Start accepts. Automaton has 96716 states and 143008 transitions. Word has length 176 [2020-12-22 09:05:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:40,112 INFO L481 AbstractCegarLoop]: Abstraction has 96716 states and 143008 transitions. [2020-12-22 09:05:40,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 09:05:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 96716 states and 143008 transitions. [2020-12-22 09:05:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 09:05:40,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:40,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:40,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:05:40,124 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:40,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1797078089, now seen corresponding path program 1 times [2020-12-22 09:05:40,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:40,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819197527] [2020-12-22 09:05:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:40,343 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 09:05:40,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819197527] [2020-12-22 09:05:40,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:40,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:05:40,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123850795] [2020-12-22 09:05:40,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:05:40,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:40,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:05:40,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:05:40,346 INFO L87 Difference]: Start difference. First operand 96716 states and 143008 transitions. Second operand 8 states. [2020-12-22 09:05:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:53,485 INFO L93 Difference]: Finished difference Result 199130 states and 294190 transitions. [2020-12-22 09:05:53,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 09:05:53,485 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 176 [2020-12-22 09:05:53,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:53,691 INFO L225 Difference]: With dead ends: 199130 [2020-12-22 09:05:53,691 INFO L226 Difference]: Without dead ends: 104031 [2020-12-22 09:05:53,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:05:53,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104031 states. [2020-12-22 09:05:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104031 to 49097. [2020-12-22 09:05:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49097 states. [2020-12-22 09:05:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49097 states to 49097 states and 72309 transitions. [2020-12-22 09:05:59,887 INFO L78 Accepts]: Start accepts. Automaton has 49097 states and 72309 transitions. Word has length 176 [2020-12-22 09:05:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:59,888 INFO L481 AbstractCegarLoop]: Abstraction has 49097 states and 72309 transitions. [2020-12-22 09:05:59,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:05:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 49097 states and 72309 transitions. [2020-12-22 09:05:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 09:05:59,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:59,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:59,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:05:59,894 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:59,895 INFO L82 PathProgramCache]: Analyzing trace with hash -138933417, now seen corresponding path program 1 times [2020-12-22 09:05:59,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:59,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682878386] [2020-12-22 09:05:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:00,507 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:06:00,635 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 09:06:00,975 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-22 09:06:01,232 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-22 09:06:01,519 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-22 09:06:02,588 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 09:06:02,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682878386] [2020-12-22 09:06:02,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:02,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 09:06:02,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816146787] [2020-12-22 09:06:02,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 09:06:02,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:02,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 09:06:02,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-12-22 09:06:02,590 INFO L87 Difference]: Start difference. First operand 49097 states and 72309 transitions. Second operand 21 states. [2020-12-22 09:06:03,039 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-12-22 09:06:03,401 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 09:06:03,769 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-12-22 09:06:04,219 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-12-22 09:06:04,659 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 09:06:05,393 WARN L197 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-12-22 09:06:05,967 WARN L197 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2020-12-22 09:06:06,755 WARN L197 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-12-22 09:06:07,399 WARN L197 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-12-22 09:06:08,058 WARN L197 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-12-22 09:06:08,673 WARN L197 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-12-22 09:06:09,173 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2020-12-22 09:06:09,713 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2020-12-22 09:06:09,955 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 23 [2020-12-22 09:06:10,561 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 23 [2020-12-22 09:06:45,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:45,278 INFO L93 Difference]: Finished difference Result 243468 states and 364747 transitions. [2020-12-22 09:06:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:06:45,278 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 176 [2020-12-22 09:06:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:45,940 INFO L225 Difference]: With dead ends: 243468 [2020-12-22 09:06:45,940 INFO L226 Difference]: Without dead ends: 220350 [2020-12-22 09:06:46,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:06:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220350 states. [2020-12-22 09:06:56,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220350 to 49657. [2020-12-22 09:06:56,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49657 states. [2020-12-22 09:06:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49657 states to 49657 states and 72958 transitions. [2020-12-22 09:06:56,301 INFO L78 Accepts]: Start accepts. Automaton has 49657 states and 72958 transitions. Word has length 176 [2020-12-22 09:06:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:56,301 INFO L481 AbstractCegarLoop]: Abstraction has 49657 states and 72958 transitions. [2020-12-22 09:06:56,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 09:06:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 49657 states and 72958 transitions. [2020-12-22 09:06:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 09:06:56,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:56,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:56,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:06:56,309 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:56,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1933329014, now seen corresponding path program 1 times [2020-12-22 09:06:56,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:56,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911023768] [2020-12-22 09:06:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:56,411 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 09:06:56,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911023768] [2020-12-22 09:06:56,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:56,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:56,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383668465] [2020-12-22 09:06:56,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:56,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:56,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:56,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:56,414 INFO L87 Difference]: Start difference. First operand 49657 states and 72958 transitions. Second operand 4 states. [2020-12-22 09:07:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:10,156 INFO L93 Difference]: Finished difference Result 107400 states and 160368 transitions. [2020-12-22 09:07:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:10,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2020-12-22 09:07:10,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:10,284 INFO L225 Difference]: With dead ends: 107400 [2020-12-22 09:07:10,284 INFO L226 Difference]: Without dead ends: 77895 [2020-12-22 09:07:10,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:10,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77895 states. [2020-12-22 09:07:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77895 to 49228. [2020-12-22 09:07:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49228 states. [2020-12-22 09:07:19,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49228 states to 49228 states and 72461 transitions. [2020-12-22 09:07:19,523 INFO L78 Accepts]: Start accepts. Automaton has 49228 states and 72461 transitions. Word has length 176 [2020-12-22 09:07:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:19,523 INFO L481 AbstractCegarLoop]: Abstraction has 49228 states and 72461 transitions. [2020-12-22 09:07:19,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:07:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 49228 states and 72461 transitions. [2020-12-22 09:07:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 09:07:19,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:19,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:07:19,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:07:19,535 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:19,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1161890815, now seen corresponding path program 1 times [2020-12-22 09:07:19,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:19,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451848141] [2020-12-22 09:07:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:19,718 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 09:07:19,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451848141] [2020-12-22 09:07:19,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:19,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:07:19,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107441388] [2020-12-22 09:07:19,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:07:19,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:19,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:07:19,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:07:19,723 INFO L87 Difference]: Start difference. First operand 49228 states and 72461 transitions. Second operand 4 states. [2020-12-22 09:07:37,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:37,367 INFO L93 Difference]: Finished difference Result 139577 states and 208150 transitions. [2020-12-22 09:07:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:37,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2020-12-22 09:07:37,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:37,489 INFO L225 Difference]: With dead ends: 139577 [2020-12-22 09:07:37,489 INFO L226 Difference]: Without dead ends: 96179 [2020-12-22 09:07:37,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:07:37,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96179 states. [2020-12-22 09:07:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96179 to 96177. [2020-12-22 09:07:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96177 states. [2020-12-22 09:07:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96177 states to 96177 states and 142040 transitions. [2020-12-22 09:07:55,088 INFO L78 Accepts]: Start accepts. Automaton has 96177 states and 142040 transitions. Word has length 176 [2020-12-22 09:07:55,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:55,089 INFO L481 AbstractCegarLoop]: Abstraction has 96177 states and 142040 transitions. [2020-12-22 09:07:55,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:07:55,089 INFO L276 IsEmpty]: Start isEmpty. Operand 96177 states and 142040 transitions. [2020-12-22 09:07:55,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 09:07:55,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:55,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:07:55,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:07:55,098 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:55,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:55,098 INFO L82 PathProgramCache]: Analyzing trace with hash -10538342, now seen corresponding path program 1 times [2020-12-22 09:07:55,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:55,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417875885] [2020-12-22 09:07:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:55,441 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 09:07:55,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417875885] [2020-12-22 09:07:55,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:55,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:07:55,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819693255] [2020-12-22 09:07:55,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:07:55,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:55,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:07:55,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:07:55,444 INFO L87 Difference]: Start difference. First operand 96177 states and 142040 transitions. Second operand 4 states.