/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_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:08:04,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:08:04,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:08:04,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:08:04,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:08:04,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:08:04,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:08:04,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:08:04,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:08:04,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:08:04,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:08:04,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:08:04,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:08:04,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:08:04,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:08:04,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:08:04,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:08:04,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:08:04,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:08:04,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:08:04,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:08:04,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:08:04,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:08:04,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:08:04,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:08:04,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:08:04,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:08:04,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:08:04,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:08:04,533 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:08:04,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:08:04,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:08:04,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:08:04,536 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:08:04,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:08:04,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:08:04,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:08:04,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:08:04,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:08:04,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:08:04,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:08:04,541 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:08:04,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:08:04,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:08:04,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:08:04,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:08:04,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:08:04,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:08:04,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:08:04,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:08:04,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:08:04,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:08:04,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:08:04,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:08:04,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:08:04,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:08:05,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:08:05,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:08:05,013 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:08:05,014 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:08:05,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-12-22 08:08:05,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/176ee7ea7/b9cfa987978b48789eeeadf2b8399c99/FLAG6c7d7648c [2020-12-22 08:08:05,981 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:08:05,982 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-12-22 08:08:06,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/176ee7ea7/b9cfa987978b48789eeeadf2b8399c99/FLAG6c7d7648c [2020-12-22 08:08:06,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/176ee7ea7/b9cfa987978b48789eeeadf2b8399c99 [2020-12-22 08:08:06,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:08:06,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:08:06,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:08:06,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:08:06,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:08:06,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:08:06" (1/1) ... [2020-12-22 08:08:06,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@349553eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:06, skipping insertion in model container [2020-12-22 08:08:06,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:08:06" (1/1) ... [2020-12-22 08:08:06,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:08:06,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:08:06,776 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_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[23847,23860] [2020-12-22 08:08:06,922 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_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[27640,27653] [2020-12-22 08:08:07,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:08:07,191 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:08:07,424 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_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[23847,23860] [2020-12-22 08:08:07,460 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_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[27640,27653] [2020-12-22 08:08:07,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:08:07,588 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:08:07,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:07 WrapperNode [2020-12-22 08:08:07,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:08:07,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:08:07,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:08:07,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:08:07,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:07" (1/1) ... [2020-12-22 08:08:07,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:07" (1/1) ... [2020-12-22 08:08:07,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:08:07,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:08:07,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:08:07,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:08:07,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:07" (1/1) ... [2020-12-22 08:08:07,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:07" (1/1) ... [2020-12-22 08:08:07,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:07" (1/1) ... [2020-12-22 08:08:07,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:07" (1/1) ... [2020-12-22 08:08:07,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:07" (1/1) ... [2020-12-22 08:08:07,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:07" (1/1) ... [2020-12-22 08:08:07,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:07" (1/1) ... [2020-12-22 08:08:07,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:08:07,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:08:07,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:08:07,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:08:07,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:07" (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 08:08:07,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:08:07,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:08:07,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:08:07,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:08:10,372 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:08:10,373 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:08:10,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:08:10 BoogieIcfgContainer [2020-12-22 08:08:10,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:08:10,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:08:10,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:08:10,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:08:10,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:08:06" (1/3) ... [2020-12-22 08:08:10,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bd558d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:08:10, skipping insertion in model container [2020-12-22 08:08:10,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:07" (2/3) ... [2020-12-22 08:08:10,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bd558d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:08:10, skipping insertion in model container [2020-12-22 08:08:10,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:08:10" (3/3) ... [2020-12-22 08:08:10,386 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-12-22 08:08:10,393 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:08:10,400 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 08:08:10,421 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 08:08:10,453 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:08:10,454 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:08:10,454 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:08:10,454 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:08:10,454 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:08:10,454 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:08:10,455 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:08:10,455 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:08:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states. [2020-12-22 08:08:10,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-12-22 08:08:10,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:10,516 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:10,517 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1418663715, now seen corresponding path program 1 times [2020-12-22 08:08:10,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:10,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585093786] [2020-12-22 08:08:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:11,865 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 08:08:11,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585093786] [2020-12-22 08:08:11,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:11,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:08:11,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206282930] [2020-12-22 08:08:11,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:08:11,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:11,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:08:11,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:08:11,897 INFO L87 Difference]: Start difference. First operand 613 states. Second operand 4 states. [2020-12-22 08:08:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:12,283 INFO L93 Difference]: Finished difference Result 1803 states and 3242 transitions. [2020-12-22 08:08:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:12,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 231 [2020-12-22 08:08:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:12,325 INFO L225 Difference]: With dead ends: 1803 [2020-12-22 08:08:12,325 INFO L226 Difference]: Without dead ends: 1195 [2020-12-22 08:08:12,335 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 08:08:12,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-12-22 08:08:12,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1162. [2020-12-22 08:08:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-12-22 08:08:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1812 transitions. [2020-12-22 08:08:12,542 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1812 transitions. Word has length 231 [2020-12-22 08:08:12,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:12,544 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1812 transitions. [2020-12-22 08:08:12,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:08:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1812 transitions. [2020-12-22 08:08:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 08:08:12,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:12,559 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:12,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:08:12,559 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:12,560 INFO L82 PathProgramCache]: Analyzing trace with hash -150188263, now seen corresponding path program 1 times [2020-12-22 08:08:12,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:12,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418223740] [2020-12-22 08:08:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:13,098 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 08:08:13,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418223740] [2020-12-22 08:08:13,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:13,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:13,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051741618] [2020-12-22 08:08:13,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:13,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:13,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:13,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:13,109 INFO L87 Difference]: Start difference. First operand 1162 states and 1812 transitions. Second operand 3 states. [2020-12-22 08:08:13,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:13,380 INFO L93 Difference]: Finished difference Result 3320 states and 5146 transitions. [2020-12-22 08:08:13,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:13,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 08:08:13,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:13,401 INFO L225 Difference]: With dead ends: 3320 [2020-12-22 08:08:13,402 INFO L226 Difference]: Without dead ends: 2283 [2020-12-22 08:08:13,405 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 08:08:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2020-12-22 08:08:13,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2252. [2020-12-22 08:08:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2252 states. [2020-12-22 08:08:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 3496 transitions. [2020-12-22 08:08:13,567 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 3496 transitions. Word has length 233 [2020-12-22 08:08:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:13,570 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 3496 transitions. [2020-12-22 08:08:13,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 3496 transitions. [2020-12-22 08:08:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 08:08:13,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:13,580 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:13,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:08:13,582 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:13,585 INFO L82 PathProgramCache]: Analyzing trace with hash 58619892, now seen corresponding path program 1 times [2020-12-22 08:08:13,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:13,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340689961] [2020-12-22 08:08:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:13,799 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 08:08:13,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340689961] [2020-12-22 08:08:13,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:13,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:13,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096580368] [2020-12-22 08:08:13,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:13,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:13,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:13,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:13,813 INFO L87 Difference]: Start difference. First operand 2252 states and 3496 transitions. Second operand 3 states. [2020-12-22 08:08:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:14,072 INFO L93 Difference]: Finished difference Result 6689 states and 10372 transitions. [2020-12-22 08:08:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:14,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 08:08:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:14,099 INFO L225 Difference]: With dead ends: 6689 [2020-12-22 08:08:14,100 INFO L226 Difference]: Without dead ends: 4475 [2020-12-22 08:08:14,106 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 08:08:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2020-12-22 08:08:14,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 2271. [2020-12-22 08:08:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2271 states. [2020-12-22 08:08:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 3524 transitions. [2020-12-22 08:08:14,321 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 3524 transitions. Word has length 233 [2020-12-22 08:08:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:14,323 INFO L481 AbstractCegarLoop]: Abstraction has 2271 states and 3524 transitions. [2020-12-22 08:08:14,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:14,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 3524 transitions. [2020-12-22 08:08:14,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-22 08:08:14,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:14,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:14,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:08:14,330 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:14,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:14,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1203815859, now seen corresponding path program 1 times [2020-12-22 08:08:14,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:14,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315599741] [2020-12-22 08:08:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:14,440 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 08:08:14,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315599741] [2020-12-22 08:08:14,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:14,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:14,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129425502] [2020-12-22 08:08:14,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:14,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:14,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:14,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:14,445 INFO L87 Difference]: Start difference. First operand 2271 states and 3524 transitions. Second operand 3 states. [2020-12-22 08:08:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:14,760 INFO L93 Difference]: Finished difference Result 6708 states and 10393 transitions. [2020-12-22 08:08:14,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:14,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2020-12-22 08:08:14,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:14,786 INFO L225 Difference]: With dead ends: 6708 [2020-12-22 08:08:14,787 INFO L226 Difference]: Without dead ends: 4493 [2020-12-22 08:08:14,795 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 08:08:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4493 states. [2020-12-22 08:08:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4493 to 2289. [2020-12-22 08:08:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-12-22 08:08:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 3545 transitions. [2020-12-22 08:08:15,008 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 3545 transitions. Word has length 234 [2020-12-22 08:08:15,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:15,008 INFO L481 AbstractCegarLoop]: Abstraction has 2289 states and 3545 transitions. [2020-12-22 08:08:15,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 3545 transitions. [2020-12-22 08:08:15,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 08:08:15,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:15,016 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:15,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:08:15,016 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:15,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1261514849, now seen corresponding path program 1 times [2020-12-22 08:08:15,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:15,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870734075] [2020-12-22 08:08:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:15,639 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 08:08:15,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870734075] [2020-12-22 08:08:15,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:15,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:08:15,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882696946] [2020-12-22 08:08:15,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:08:15,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:15,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:08:15,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:08:15,644 INFO L87 Difference]: Start difference. First operand 2289 states and 3545 transitions. Second operand 5 states. [2020-12-22 08:08:16,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:16,176 INFO L93 Difference]: Finished difference Result 6563 states and 10134 transitions. [2020-12-22 08:08:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:16,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 235 [2020-12-22 08:08:16,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:16,226 INFO L225 Difference]: With dead ends: 6563 [2020-12-22 08:08:16,227 INFO L226 Difference]: Without dead ends: 4317 [2020-12-22 08:08:16,231 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 08:08:16,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4317 states. [2020-12-22 08:08:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4317 to 4292. [2020-12-22 08:08:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-12-22 08:08:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 6577 transitions. [2020-12-22 08:08:16,556 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 6577 transitions. Word has length 235 [2020-12-22 08:08:16,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:16,557 INFO L481 AbstractCegarLoop]: Abstraction has 4292 states and 6577 transitions. [2020-12-22 08:08:16,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:08:16,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 6577 transitions. [2020-12-22 08:08:16,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 08:08:16,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:16,568 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:16,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:08:16,569 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:16,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:16,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1134804277, now seen corresponding path program 1 times [2020-12-22 08:08:16,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:16,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143792056] [2020-12-22 08:08:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:17,029 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 08:08:17,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143792056] [2020-12-22 08:08:17,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:17,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:08:17,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023471715] [2020-12-22 08:08:17,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:08:17,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:17,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:08:17,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:08:17,032 INFO L87 Difference]: Start difference. First operand 4292 states and 6577 transitions. Second operand 4 states. [2020-12-22 08:08:17,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:17,801 INFO L93 Difference]: Finished difference Result 12508 states and 19139 transitions. [2020-12-22 08:08:17,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:17,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2020-12-22 08:08:17,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:17,873 INFO L225 Difference]: With dead ends: 12508 [2020-12-22 08:08:17,874 INFO L226 Difference]: Without dead ends: 8342 [2020-12-22 08:08:17,883 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 08:08:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8342 states. [2020-12-22 08:08:18,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8342 to 8280. [2020-12-22 08:08:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8280 states. [2020-12-22 08:08:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8280 states to 8280 states and 12587 transitions. [2020-12-22 08:08:18,620 INFO L78 Accepts]: Start accepts. Automaton has 8280 states and 12587 transitions. Word has length 237 [2020-12-22 08:08:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:18,620 INFO L481 AbstractCegarLoop]: Abstraction has 8280 states and 12587 transitions. [2020-12-22 08:08:18,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:08:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 8280 states and 12587 transitions. [2020-12-22 08:08:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 08:08:18,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:18,648 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:18,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:08:18,655 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:18,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:18,656 INFO L82 PathProgramCache]: Analyzing trace with hash -293921040, now seen corresponding path program 1 times [2020-12-22 08:08:18,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:18,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620037551] [2020-12-22 08:08:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:18,900 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 08:08:18,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620037551] [2020-12-22 08:08:18,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:18,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:18,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713822298] [2020-12-22 08:08:18,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:18,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:18,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:18,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:18,904 INFO L87 Difference]: Start difference. First operand 8280 states and 12587 transitions. Second operand 3 states. [2020-12-22 08:08:20,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:20,009 INFO L93 Difference]: Finished difference Result 23966 states and 36309 transitions. [2020-12-22 08:08:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:20,010 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 08:08:20,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:20,052 INFO L225 Difference]: With dead ends: 23966 [2020-12-22 08:08:20,052 INFO L226 Difference]: Without dead ends: 16200 [2020-12-22 08:08:20,067 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 08:08:20,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16200 states. [2020-12-22 08:08:21,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16200 to 16138. [2020-12-22 08:08:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16138 states. [2020-12-22 08:08:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 24375 transitions. [2020-12-22 08:08:21,225 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 24375 transitions. Word has length 239 [2020-12-22 08:08:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:21,225 INFO L481 AbstractCegarLoop]: Abstraction has 16138 states and 24375 transitions. [2020-12-22 08:08:21,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 24375 transitions. [2020-12-22 08:08:21,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 08:08:21,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:21,262 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:21,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:08:21,263 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:21,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1568159733, now seen corresponding path program 1 times [2020-12-22 08:08:21,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:21,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007951134] [2020-12-22 08:08:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:21,461 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 08:08:21,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007951134] [2020-12-22 08:08:21,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:21,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:21,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833720341] [2020-12-22 08:08:21,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:21,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:21,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:21,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:21,464 INFO L87 Difference]: Start difference. First operand 16138 states and 24375 transitions. Second operand 3 states. [2020-12-22 08:08:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:23,393 INFO L93 Difference]: Finished difference Result 47924 states and 72327 transitions. [2020-12-22 08:08:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:23,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 08:08:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:23,473 INFO L225 Difference]: With dead ends: 47924 [2020-12-22 08:08:23,473 INFO L226 Difference]: Without dead ends: 32058 [2020-12-22 08:08:23,508 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 08:08:23,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32058 states. [2020-12-22 08:08:24,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32058 to 16252. [2020-12-22 08:08:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16252 states. [2020-12-22 08:08:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16252 states to 16252 states and 24543 transitions. [2020-12-22 08:08:24,733 INFO L78 Accepts]: Start accepts. Automaton has 16252 states and 24543 transitions. Word has length 239 [2020-12-22 08:08:24,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:24,733 INFO L481 AbstractCegarLoop]: Abstraction has 16252 states and 24543 transitions. [2020-12-22 08:08:24,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 16252 states and 24543 transitions. [2020-12-22 08:08:24,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-22 08:08:24,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:24,765 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:24,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:08:24,766 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:24,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:24,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1401321244, now seen corresponding path program 1 times [2020-12-22 08:08:24,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:24,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314667653] [2020-12-22 08:08:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:24,886 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 08:08:24,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314667653] [2020-12-22 08:08:24,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:24,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:24,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707945902] [2020-12-22 08:08:24,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:24,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:24,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:24,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:24,890 INFO L87 Difference]: Start difference. First operand 16252 states and 24543 transitions. Second operand 3 states. [2020-12-22 08:08:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:26,682 INFO L93 Difference]: Finished difference Result 47986 states and 72365 transitions. [2020-12-22 08:08:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:26,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-12-22 08:08:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:26,751 INFO L225 Difference]: With dead ends: 47986 [2020-12-22 08:08:26,751 INFO L226 Difference]: Without dead ends: 32154 [2020-12-22 08:08:26,781 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 08:08:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32154 states. [2020-12-22 08:08:27,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32154 to 16348. [2020-12-22 08:08:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16348 states. [2020-12-22 08:08:27,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16348 states to 16348 states and 24653 transitions. [2020-12-22 08:08:27,926 INFO L78 Accepts]: Start accepts. Automaton has 16348 states and 24653 transitions. Word has length 240 [2020-12-22 08:08:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:27,927 INFO L481 AbstractCegarLoop]: Abstraction has 16348 states and 24653 transitions. [2020-12-22 08:08:27,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand 16348 states and 24653 transitions. [2020-12-22 08:08:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 08:08:27,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:27,976 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:27,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:08:27,976 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:27,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:27,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1792031627, now seen corresponding path program 1 times [2020-12-22 08:08:27,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:27,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059724351] [2020-12-22 08:08:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:28,229 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 08:08:28,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059724351] [2020-12-22 08:08:28,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:28,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:28,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801564889] [2020-12-22 08:08:28,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:28,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:28,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:28,232 INFO L87 Difference]: Start difference. First operand 16348 states and 24653 transitions. Second operand 3 states. [2020-12-22 08:08:29,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:29,852 INFO L93 Difference]: Finished difference Result 47218 states and 71041 transitions. [2020-12-22 08:08:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:29,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-12-22 08:08:29,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:29,921 INFO L225 Difference]: With dead ends: 47218 [2020-12-22 08:08:29,921 INFO L226 Difference]: Without dead ends: 31772 [2020-12-22 08:08:29,958 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 08:08:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31772 states. [2020-12-22 08:08:31,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31772 to 31710. [2020-12-22 08:08:31,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31710 states. [2020-12-22 08:08:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31710 states to 31710 states and 47489 transitions. [2020-12-22 08:08:31,945 INFO L78 Accepts]: Start accepts. Automaton has 31710 states and 47489 transitions. Word has length 241 [2020-12-22 08:08:31,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:31,945 INFO L481 AbstractCegarLoop]: Abstraction has 31710 states and 47489 transitions. [2020-12-22 08:08:31,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 31710 states and 47489 transitions. [2020-12-22 08:08:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 08:08:31,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:31,991 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:31,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:08:31,991 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:31,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:31,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1670163144, now seen corresponding path program 1 times [2020-12-22 08:08:31,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:31,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112906392] [2020-12-22 08:08:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:32,627 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 08:08:32,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112906392] [2020-12-22 08:08:32,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:32,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:08:32,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787310846] [2020-12-22 08:08:32,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:08:32,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:32,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:08:32,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:08:32,632 INFO L87 Difference]: Start difference. First operand 31710 states and 47489 transitions. Second operand 5 states. [2020-12-22 08:08:36,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:36,485 INFO L93 Difference]: Finished difference Result 92486 states and 138217 transitions. [2020-12-22 08:08:36,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:36,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-12-22 08:08:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:36,636 INFO L225 Difference]: With dead ends: 92486 [2020-12-22 08:08:36,636 INFO L226 Difference]: Without dead ends: 61157 [2020-12-22 08:08:36,675 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 08:08:36,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61157 states. [2020-12-22 08:08:40,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61157 to 61134. [2020-12-22 08:08:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61134 states. [2020-12-22 08:08:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61134 states to 61134 states and 90674 transitions. [2020-12-22 08:08:40,657 INFO L78 Accepts]: Start accepts. Automaton has 61134 states and 90674 transitions. Word has length 241 [2020-12-22 08:08:40,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:40,658 INFO L481 AbstractCegarLoop]: Abstraction has 61134 states and 90674 transitions. [2020-12-22 08:08:40,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:08:40,658 INFO L276 IsEmpty]: Start isEmpty. Operand 61134 states and 90674 transitions. [2020-12-22 08:08:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 08:08:40,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:40,711 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:40,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:08:40,712 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:40,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1100534090, now seen corresponding path program 1 times [2020-12-22 08:08:40,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:40,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511005800] [2020-12-22 08:08:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:41,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511005800] [2020-12-22 08:08:41,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:41,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:08:41,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471809124] [2020-12-22 08:08:41,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:08:41,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:41,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:08:41,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:08:41,313 INFO L87 Difference]: Start difference. First operand 61134 states and 90674 transitions. Second operand 5 states. [2020-12-22 08:08:47,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:47,915 INFO L93 Difference]: Finished difference Result 179944 states and 266593 transitions. [2020-12-22 08:08:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:47,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 08:08:47,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:48,102 INFO L225 Difference]: With dead ends: 179944 [2020-12-22 08:08:48,102 INFO L226 Difference]: Without dead ends: 119417 [2020-12-22 08:08:48,217 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 08:08:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119417 states. [2020-12-22 08:08:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119417 to 119402. [2020-12-22 08:08:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119402 states. [2020-12-22 08:08:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119402 states to 119402 states and 175706 transitions. [2020-12-22 08:08:55,741 INFO L78 Accepts]: Start accepts. Automaton has 119402 states and 175706 transitions. Word has length 243 [2020-12-22 08:08:55,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:55,741 INFO L481 AbstractCegarLoop]: Abstraction has 119402 states and 175706 transitions. [2020-12-22 08:08:55,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:08:55,741 INFO L276 IsEmpty]: Start isEmpty. Operand 119402 states and 175706 transitions. [2020-12-22 08:08:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 08:08:56,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:56,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:56,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:08:56,043 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:56,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1942873612, now seen corresponding path program 1 times [2020-12-22 08:08:56,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:56,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179579102] [2020-12-22 08:08:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:56,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179579102] [2020-12-22 08:08:56,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:56,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:08:56,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102847204] [2020-12-22 08:08:56,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:08:56,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:56,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:08:56,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:08:56,447 INFO L87 Difference]: Start difference. First operand 119402 states and 175706 transitions. Second operand 4 states. [2020-12-22 08:09:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:04,798 INFO L93 Difference]: Finished difference Result 258242 states and 379811 transitions. [2020-12-22 08:09:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:09:04,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 243 [2020-12-22 08:09:04,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:05,020 INFO L225 Difference]: With dead ends: 258242 [2020-12-22 08:09:05,021 INFO L226 Difference]: Without dead ends: 140446 [2020-12-22 08:09:05,323 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 08:09:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140446 states. [2020-12-22 08:09:12,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140446 to 119888. [2020-12-22 08:09:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119888 states. [2020-12-22 08:09:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119888 states to 119888 states and 176297 transitions. [2020-12-22 08:09:13,013 INFO L78 Accepts]: Start accepts. Automaton has 119888 states and 176297 transitions. Word has length 243 [2020-12-22 08:09:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:13,014 INFO L481 AbstractCegarLoop]: Abstraction has 119888 states and 176297 transitions. [2020-12-22 08:09:13,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:09:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand 119888 states and 176297 transitions. [2020-12-22 08:09:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-12-22 08:09:13,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:13,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:09:13,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:09:13,112 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:13,113 INFO L82 PathProgramCache]: Analyzing trace with hash 578973725, now seen corresponding path program 1 times [2020-12-22 08:09:13,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:13,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661861729] [2020-12-22 08:09:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:13,503 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 08:09:13,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661861729] [2020-12-22 08:09:13,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:13,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:09:13,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599552537] [2020-12-22 08:09:13,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:09:13,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:13,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:09:13,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:09:13,505 INFO L87 Difference]: Start difference. First operand 119888 states and 176297 transitions. Second operand 3 states. [2020-12-22 08:09:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:26,789 INFO L93 Difference]: Finished difference Result 355270 states and 522069 transitions. [2020-12-22 08:09:26,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:09:26,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 245 [2020-12-22 08:09:26,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:27,191 INFO L225 Difference]: With dead ends: 355270 [2020-12-22 08:09:27,192 INFO L226 Difference]: Without dead ends: 237582 [2020-12-22 08:09:27,326 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 08:09:27,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237582 states. [2020-12-22 08:09:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237582 to 120806. [2020-12-22 08:09:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120806 states. [2020-12-22 08:09:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120806 states to 120806 states and 177533 transitions. [2020-12-22 08:09:36,778 INFO L78 Accepts]: Start accepts. Automaton has 120806 states and 177533 transitions. Word has length 245 [2020-12-22 08:09:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:36,778 INFO L481 AbstractCegarLoop]: Abstraction has 120806 states and 177533 transitions. [2020-12-22 08:09:36,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:09:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 120806 states and 177533 transitions. [2020-12-22 08:09:36,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-22 08:09:36,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:36,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:09:36,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:09:36,875 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:36,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1284457840, now seen corresponding path program 1 times [2020-12-22 08:09:36,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:36,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693899473] [2020-12-22 08:09:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:36,995 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 08:09:36,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693899473] [2020-12-22 08:09:36,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:36,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:09:36,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534289731] [2020-12-22 08:09:36,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:09:36,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:36,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:09:36,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:09:36,999 INFO L87 Difference]: Start difference. First operand 120806 states and 177533 transitions. Second operand 3 states. [2020-12-22 08:09:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:52,131 INFO L93 Difference]: Finished difference Result 356011 states and 522756 transitions. [2020-12-22 08:09:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:09:52,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 246 [2020-12-22 08:09:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:52,725 INFO L225 Difference]: With dead ends: 356011 [2020-12-22 08:09:52,725 INFO L226 Difference]: Without dead ends: 238587 [2020-12-22 08:09:52,862 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 08:09:53,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238587 states. [2020-12-22 08:10:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238587 to 121667. [2020-12-22 08:10:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121667 states. [2020-12-22 08:10:02,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121667 states to 121667 states and 178529 transitions. [2020-12-22 08:10:02,735 INFO L78 Accepts]: Start accepts. Automaton has 121667 states and 178529 transitions. Word has length 246 [2020-12-22 08:10:02,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:02,735 INFO L481 AbstractCegarLoop]: Abstraction has 121667 states and 178529 transitions. [2020-12-22 08:10:02,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 121667 states and 178529 transitions. [2020-12-22 08:10:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-12-22 08:10:02,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:02,829 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:10:02,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:10:02,829 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:02,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1701972150, now seen corresponding path program 1 times [2020-12-22 08:10:02,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:02,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098789970] [2020-12-22 08:10:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:03,543 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 08:10:03,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098789970] [2020-12-22 08:10:03,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:03,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:10:03,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900148490] [2020-12-22 08:10:03,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:10:03,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:03,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:10:03,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:10:03,546 INFO L87 Difference]: Start difference. First operand 121667 states and 178529 transitions. Second operand 5 states. [2020-12-22 08:10:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:13,622 INFO L93 Difference]: Finished difference Result 260863 states and 382829 transitions. [2020-12-22 08:10:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:10:13,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2020-12-22 08:10:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:13,992 INFO L225 Difference]: With dead ends: 260863 [2020-12-22 08:10:13,992 INFO L226 Difference]: Without dead ends: 142162 [2020-12-22 08:10:14,080 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 08:10:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142162 states.