/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.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:08:36,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:08:36,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:08:36,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:08:36,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:08:36,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:08:36,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:08:36,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:08:36,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:08:36,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:08:36,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:08:36,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:08:36,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:08:36,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:08:36,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:08:36,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:08:36,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:08:36,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:08:36,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:08:36,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:08:36,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:08:36,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:08:36,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:08:36,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:08:36,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:08:36,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:08:36,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:08:36,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:08:36,140 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:08:36,195 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:08:36,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:08:36,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:08:36,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:08:36,199 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:08:36,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:08:36,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:08:36,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:08:36,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:08:36,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:08:36,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:08:36,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:08:36,202 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:08:36,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:08:36,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:08:36,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:08:36,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:08:36,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:08:36,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:08:36,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:08:36,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:08:36,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:08:36,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:08:36,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:08:36,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:08:36,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:08:36,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:08:36,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:08:36,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:08:36,687 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:08:36,688 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:08:36,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-12-22 08:08:36,780 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/848b44198/5b5f76983e714999b21be51ff27c0a43/FLAG16e3eaf3c [2020-12-22 08:08:37,717 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:08:37,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-12-22 08:08:37,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/848b44198/5b5f76983e714999b21be51ff27c0a43/FLAG16e3eaf3c [2020-12-22 08:08:37,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/848b44198/5b5f76983e714999b21be51ff27c0a43 [2020-12-22 08:08:37,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:08:37,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:08:37,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:08:37,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:08:37,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:08:37,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:08:37" (1/1) ... [2020-12-22 08:08:37,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c42c515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:37, skipping insertion in model container [2020-12-22 08:08:37,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:08:37" (1/1) ... [2020-12-22 08:08:37,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:08:38,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:08:38,617 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.UNBOUNDED.pals.c.v+lhb-reducer.c[23919,23932] [2020-12-22 08:08:38,668 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.UNBOUNDED.pals.c.v+lhb-reducer.c[27757,27770] [2020-12-22 08:08:38,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:08:38,918 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:08:39,222 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.UNBOUNDED.pals.c.v+lhb-reducer.c[23919,23932] [2020-12-22 08:08:39,260 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.UNBOUNDED.pals.c.v+lhb-reducer.c[27757,27770] [2020-12-22 08:08:39,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:08:39,383 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:08:39,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:39 WrapperNode [2020-12-22 08:08:39,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:08:39,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:08:39,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:08:39,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:08:39,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:39" (1/1) ... [2020-12-22 08:08:39,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:39" (1/1) ... [2020-12-22 08:08:39,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:08:39,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:08:39,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:08:39,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:08:39,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:39" (1/1) ... [2020-12-22 08:08:39,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:39" (1/1) ... [2020-12-22 08:08:39,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:39" (1/1) ... [2020-12-22 08:08:39,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:39" (1/1) ... [2020-12-22 08:08:39,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:39" (1/1) ... [2020-12-22 08:08:39,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:39" (1/1) ... [2020-12-22 08:08:39,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:39" (1/1) ... [2020-12-22 08:08:39,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:08:39,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:08:39,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:08:39,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:08:39,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:39" (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 08:08:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:08:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:08:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:08:39,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:08:42,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:08:42,654 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:08:42,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:08:42 BoogieIcfgContainer [2020-12-22 08:08:42,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:08:42,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:08:42,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:08:42,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:08:42,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:08:37" (1/3) ... [2020-12-22 08:08:42,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7234af5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:08:42, skipping insertion in model container [2020-12-22 08:08:42,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:39" (2/3) ... [2020-12-22 08:08:42,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7234af5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:08:42, skipping insertion in model container [2020-12-22 08:08:42,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:08:42" (3/3) ... [2020-12-22 08:08:42,670 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-12-22 08:08:42,677 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:08:42,685 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 08:08:42,713 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 08:08:42,766 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:08:42,766 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:08:42,766 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:08:42,766 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:08:42,767 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:08:42,767 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:08:42,767 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:08:42,767 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:08:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states. [2020-12-22 08:08:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 08:08:42,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:42,831 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 08:08:42,832 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:42,838 INFO L82 PathProgramCache]: Analyzing trace with hash 761689277, now seen corresponding path program 1 times [2020-12-22 08:08:42,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:42,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481411924] [2020-12-22 08:08:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:44,296 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 08:08:44,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481411924] [2020-12-22 08:08:44,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:44,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:08:44,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731033064] [2020-12-22 08:08:44,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:08:44,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:44,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:08:44,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:08:44,327 INFO L87 Difference]: Start difference. First operand 627 states. Second operand 4 states. [2020-12-22 08:08:44,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:44,775 INFO L93 Difference]: Finished difference Result 1845 states and 3314 transitions. [2020-12-22 08:08:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:44,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2020-12-22 08:08:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:44,816 INFO L225 Difference]: With dead ends: 1845 [2020-12-22 08:08:44,817 INFO L226 Difference]: Without dead ends: 1223 [2020-12-22 08:08:44,829 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 08:08:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2020-12-22 08:08:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1188. [2020-12-22 08:08:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1188 states. [2020-12-22 08:08:45,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1846 transitions. [2020-12-22 08:08:45,011 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1846 transitions. Word has length 235 [2020-12-22 08:08:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:45,012 INFO L481 AbstractCegarLoop]: Abstraction has 1188 states and 1846 transitions. [2020-12-22 08:08:45,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:08:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1846 transitions. [2020-12-22 08:08:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 08:08:45,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:45,020 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 08:08:45,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:08:45,021 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:45,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1859701747, now seen corresponding path program 1 times [2020-12-22 08:08:45,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:45,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414995818] [2020-12-22 08:08:45,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:45,282 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 08:08:45,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414995818] [2020-12-22 08:08:45,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:45,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:45,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028144985] [2020-12-22 08:08:45,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:45,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:45,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:45,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:45,290 INFO L87 Difference]: Start difference. First operand 1188 states and 1846 transitions. Second operand 3 states. [2020-12-22 08:08:45,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:45,529 INFO L93 Difference]: Finished difference Result 3398 states and 5248 transitions. [2020-12-22 08:08:45,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:45,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2020-12-22 08:08:45,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:45,545 INFO L225 Difference]: With dead ends: 3398 [2020-12-22 08:08:45,546 INFO L226 Difference]: Without dead ends: 2335 [2020-12-22 08:08:45,549 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 08:08:45,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2020-12-22 08:08:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 2302. [2020-12-22 08:08:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2302 states. [2020-12-22 08:08:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 3562 transitions. [2020-12-22 08:08:45,669 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 3562 transitions. Word has length 237 [2020-12-22 08:08:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:45,672 INFO L481 AbstractCegarLoop]: Abstraction has 2302 states and 3562 transitions. [2020-12-22 08:08:45,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 3562 transitions. [2020-12-22 08:08:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 08:08:45,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:45,680 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 08:08:45,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:08:45,681 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:45,683 INFO L82 PathProgramCache]: Analyzing trace with hash 839192398, now seen corresponding path program 1 times [2020-12-22 08:08:45,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:45,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329428421] [2020-12-22 08:08:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:45,849 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 08:08:45,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329428421] [2020-12-22 08:08:45,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:45,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:45,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167826535] [2020-12-22 08:08:45,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:45,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:45,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:45,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:45,855 INFO L87 Difference]: Start difference. First operand 2302 states and 3562 transitions. Second operand 3 states. [2020-12-22 08:08:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:46,128 INFO L93 Difference]: Finished difference Result 6839 states and 10570 transitions. [2020-12-22 08:08:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:46,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2020-12-22 08:08:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:46,163 INFO L225 Difference]: With dead ends: 6839 [2020-12-22 08:08:46,165 INFO L226 Difference]: Without dead ends: 4575 [2020-12-22 08:08:46,172 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 08:08:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2020-12-22 08:08:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 2321. [2020-12-22 08:08:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2321 states. [2020-12-22 08:08:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3590 transitions. [2020-12-22 08:08:46,499 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3590 transitions. Word has length 237 [2020-12-22 08:08:46,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:46,500 INFO L481 AbstractCegarLoop]: Abstraction has 2321 states and 3590 transitions. [2020-12-22 08:08:46,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3590 transitions. [2020-12-22 08:08:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-12-22 08:08:46,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:46,515 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] [2020-12-22 08:08:46,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:08:46,515 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:46,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:46,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1563603795, now seen corresponding path program 1 times [2020-12-22 08:08:46,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:46,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065383842] [2020-12-22 08:08:46,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:46,713 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 08:08:46,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065383842] [2020-12-22 08:08:46,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:46,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:46,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572261113] [2020-12-22 08:08:46,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:46,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:46,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:46,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:46,719 INFO L87 Difference]: Start difference. First operand 2321 states and 3590 transitions. Second operand 3 states. [2020-12-22 08:08:47,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:47,083 INFO L93 Difference]: Finished difference Result 6858 states and 10591 transitions. [2020-12-22 08:08:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:47,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 238 [2020-12-22 08:08:47,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:47,111 INFO L225 Difference]: With dead ends: 6858 [2020-12-22 08:08:47,111 INFO L226 Difference]: Without dead ends: 4593 [2020-12-22 08:08:47,120 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 08:08:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2020-12-22 08:08:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 2339. [2020-12-22 08:08:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2339 states. [2020-12-22 08:08:47,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 3611 transitions. [2020-12-22 08:08:47,344 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 3611 transitions. Word has length 238 [2020-12-22 08:08:47,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:47,345 INFO L481 AbstractCegarLoop]: Abstraction has 2339 states and 3611 transitions. [2020-12-22 08:08:47,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:47,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 3611 transitions. [2020-12-22 08:08:47,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 08:08:47,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:47,353 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 08:08:47,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:08:47,353 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:47,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2086534920, now seen corresponding path program 1 times [2020-12-22 08:08:47,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:47,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455310577] [2020-12-22 08:08:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:47,636 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 08:08:47,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455310577] [2020-12-22 08:08:47,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:47,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:47,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806623190] [2020-12-22 08:08:47,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:47,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:47,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:47,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:47,640 INFO L87 Difference]: Start difference. First operand 2339 states and 3611 transitions. Second operand 3 states. [2020-12-22 08:08:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:48,045 INFO L93 Difference]: Finished difference Result 6601 states and 10128 transitions. [2020-12-22 08:08:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:48,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 08:08:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:48,072 INFO L225 Difference]: With dead ends: 6601 [2020-12-22 08:08:48,072 INFO L226 Difference]: Without dead ends: 4503 [2020-12-22 08:08:48,077 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 08:08:48,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2020-12-22 08:08:48,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 4472. [2020-12-22 08:08:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4472 states. [2020-12-22 08:08:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 6855 transitions. [2020-12-22 08:08:48,435 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 6855 transitions. Word has length 239 [2020-12-22 08:08:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:48,437 INFO L481 AbstractCegarLoop]: Abstraction has 4472 states and 6855 transitions. [2020-12-22 08:08:48,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:48,438 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 6855 transitions. [2020-12-22 08:08:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 08:08:48,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:48,449 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 08:08:48,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:08:48,450 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:48,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:48,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1578780165, now seen corresponding path program 1 times [2020-12-22 08:08:48,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:48,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714599605] [2020-12-22 08:08:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:48,951 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 08:08:48,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714599605] [2020-12-22 08:08:48,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:48,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:08:48,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187486325] [2020-12-22 08:08:48,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:08:48,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:48,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:08:48,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:08:48,954 INFO L87 Difference]: Start difference. First operand 4472 states and 6855 transitions. Second operand 5 states. [2020-12-22 08:08:49,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:49,765 INFO L93 Difference]: Finished difference Result 12973 states and 19836 transitions. [2020-12-22 08:08:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:49,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 239 [2020-12-22 08:08:49,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:49,812 INFO L225 Difference]: With dead ends: 12973 [2020-12-22 08:08:49,813 INFO L226 Difference]: Without dead ends: 8556 [2020-12-22 08:08:49,822 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 08:08:49,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2020-12-22 08:08:50,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 8530. [2020-12-22 08:08:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8530 states. [2020-12-22 08:08:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8530 states to 8530 states and 12947 transitions. [2020-12-22 08:08:50,484 INFO L78 Accepts]: Start accepts. Automaton has 8530 states and 12947 transitions. Word has length 239 [2020-12-22 08:08:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:50,484 INFO L481 AbstractCegarLoop]: Abstraction has 8530 states and 12947 transitions. [2020-12-22 08:08:50,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:08:50,485 INFO L276 IsEmpty]: Start isEmpty. Operand 8530 states and 12947 transitions. [2020-12-22 08:08:50,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 08:08:50,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:50,504 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 08:08:50,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:08:50,511 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:50,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2049253404, now seen corresponding path program 1 times [2020-12-22 08:08:50,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:50,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867363671] [2020-12-22 08:08:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:50,910 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 08:08:50,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867363671] [2020-12-22 08:08:50,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:50,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:08:50,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776343318] [2020-12-22 08:08:50,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:08:50,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:50,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:08:50,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:08:50,913 INFO L87 Difference]: Start difference. First operand 8530 states and 12947 transitions. Second operand 5 states. [2020-12-22 08:08:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:52,033 INFO L93 Difference]: Finished difference Result 24974 states and 37844 transitions. [2020-12-22 08:08:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:52,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-12-22 08:08:52,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:52,075 INFO L225 Difference]: With dead ends: 24974 [2020-12-22 08:08:52,075 INFO L226 Difference]: Without dead ends: 16561 [2020-12-22 08:08:52,091 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 08:08:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16561 states. [2020-12-22 08:08:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16561 to 16544. [2020-12-22 08:08:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16544 states. [2020-12-22 08:08:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16544 states to 16544 states and 24907 transitions. [2020-12-22 08:08:53,307 INFO L78 Accepts]: Start accepts. Automaton has 16544 states and 24907 transitions. Word has length 241 [2020-12-22 08:08:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:53,308 INFO L481 AbstractCegarLoop]: Abstraction has 16544 states and 24907 transitions. [2020-12-22 08:08:53,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:08:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 16544 states and 24907 transitions. [2020-12-22 08:08:53,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 08:08:53,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:53,346 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 08:08:53,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:08:53,346 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:53,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:53,347 INFO L82 PathProgramCache]: Analyzing trace with hash 975893657, now seen corresponding path program 1 times [2020-12-22 08:08:53,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:53,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925057106] [2020-12-22 08:08:53,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:53,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925057106] [2020-12-22 08:08:53,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:53,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:08:53,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792524373] [2020-12-22 08:08:53,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:08:53,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:53,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:08:53,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:08:53,851 INFO L87 Difference]: Start difference. First operand 16544 states and 24907 transitions. Second operand 4 states. [2020-12-22 08:08:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:55,619 INFO L93 Difference]: Finished difference Result 48654 states and 73142 transitions. [2020-12-22 08:08:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:55,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2020-12-22 08:08:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:55,699 INFO L225 Difference]: With dead ends: 48654 [2020-12-22 08:08:55,700 INFO L226 Difference]: Without dead ends: 32340 [2020-12-22 08:08:55,728 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 08:08:55,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32340 states. [2020-12-22 08:08:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32340 to 32140. [2020-12-22 08:08:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32140 states. [2020-12-22 08:08:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32140 states to 32140 states and 48007 transitions. [2020-12-22 08:08:57,930 INFO L78 Accepts]: Start accepts. Automaton has 32140 states and 48007 transitions. Word has length 241 [2020-12-22 08:08:57,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:57,930 INFO L481 AbstractCegarLoop]: Abstraction has 32140 states and 48007 transitions. [2020-12-22 08:08:57,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:08:57,931 INFO L276 IsEmpty]: Start isEmpty. Operand 32140 states and 48007 transitions. [2020-12-22 08:08:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 08:08:57,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:57,987 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 08:08:57,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:08:57,988 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:57,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:57,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1975032520, now seen corresponding path program 1 times [2020-12-22 08:08:57,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:57,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066266836] [2020-12-22 08:08:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:58,168 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 08:08:58,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066266836] [2020-12-22 08:08:58,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:58,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:58,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924484410] [2020-12-22 08:08:58,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:58,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:58,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:58,172 INFO L87 Difference]: Start difference. First operand 32140 states and 48007 transitions. Second operand 3 states. [2020-12-22 08:09:01,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:01,010 INFO L93 Difference]: Finished difference Result 93868 states and 139805 transitions. [2020-12-22 08:09:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:09:01,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 243 [2020-12-22 08:09:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:01,150 INFO L225 Difference]: With dead ends: 93868 [2020-12-22 08:09:01,150 INFO L226 Difference]: Without dead ends: 63108 [2020-12-22 08:09:01,221 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 08:09:01,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63108 states. [2020-12-22 08:09:04,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63108 to 62908. [2020-12-22 08:09:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62908 states. [2020-12-22 08:09:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62908 states to 62908 states and 93317 transitions. [2020-12-22 08:09:04,324 INFO L78 Accepts]: Start accepts. Automaton has 62908 states and 93317 transitions. Word has length 243 [2020-12-22 08:09:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:04,324 INFO L481 AbstractCegarLoop]: Abstraction has 62908 states and 93317 transitions. [2020-12-22 08:09:04,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:09:04,325 INFO L276 IsEmpty]: Start isEmpty. Operand 62908 states and 93317 transitions. [2020-12-22 08:09:04,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 08:09:04,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:04,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:09:04,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:09:04,397 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:04,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:04,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1487664941, now seen corresponding path program 1 times [2020-12-22 08:09:04,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:04,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141612771] [2020-12-22 08:09:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:04,529 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 08:09:04,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141612771] [2020-12-22 08:09:04,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:04,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:09:04,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808980029] [2020-12-22 08:09:04,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:09:04,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:04,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:09:04,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:09:04,532 INFO L87 Difference]: Start difference. First operand 62908 states and 93317 transitions. Second operand 3 states. [2020-12-22 08:09:09,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:09,642 INFO L93 Difference]: Finished difference Result 187600 states and 278127 transitions. [2020-12-22 08:09:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:09:09,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 243 [2020-12-22 08:09:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:09,892 INFO L225 Difference]: With dead ends: 187600 [2020-12-22 08:09:09,892 INFO L226 Difference]: Without dead ends: 125354 [2020-12-22 08:09:09,954 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 08:09:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125354 states. [2020-12-22 08:09:13,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125354 to 63118. [2020-12-22 08:09:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63118 states. [2020-12-22 08:09:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63118 states to 63118 states and 93629 transitions. [2020-12-22 08:09:13,896 INFO L78 Accepts]: Start accepts. Automaton has 63118 states and 93629 transitions. Word has length 243 [2020-12-22 08:09:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:13,896 INFO L481 AbstractCegarLoop]: Abstraction has 63118 states and 93629 transitions. [2020-12-22 08:09:13,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:09:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 63118 states and 93629 transitions. [2020-12-22 08:09:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-22 08:09:13,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:13,981 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] [2020-12-22 08:09:13,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:09:13,982 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:13,982 INFO L82 PathProgramCache]: Analyzing trace with hash 21057102, now seen corresponding path program 1 times [2020-12-22 08:09:13,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:13,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905878375] [2020-12-22 08:09:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:14,072 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 08:09:14,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905878375] [2020-12-22 08:09:14,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:14,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:09:14,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219269598] [2020-12-22 08:09:14,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:09:14,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:14,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:09:14,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:09:14,075 INFO L87 Difference]: Start difference. First operand 63118 states and 93629 transitions. Second operand 3 states. [2020-12-22 08:09:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:19,682 INFO L93 Difference]: Finished difference Result 187788 states and 278333 transitions. [2020-12-22 08:09:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:09:19,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 244 [2020-12-22 08:09:19,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:19,847 INFO L225 Difference]: With dead ends: 187788 [2020-12-22 08:09:19,847 INFO L226 Difference]: Without dead ends: 125532 [2020-12-22 08:09:19,956 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 08:09:20,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125532 states. [2020-12-22 08:09:23,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125532 to 63348. [2020-12-22 08:09:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63348 states. [2020-12-22 08:09:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63348 states to 63348 states and 93893 transitions. [2020-12-22 08:09:23,816 INFO L78 Accepts]: Start accepts. Automaton has 63348 states and 93893 transitions. Word has length 244 [2020-12-22 08:09:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:23,816 INFO L481 AbstractCegarLoop]: Abstraction has 63348 states and 93893 transitions. [2020-12-22 08:09:23,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:09:23,817 INFO L276 IsEmpty]: Start isEmpty. Operand 63348 states and 93893 transitions. [2020-12-22 08:09:23,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-12-22 08:09:23,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:23,873 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 08:09:23,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:09:23,874 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:23,874 INFO L82 PathProgramCache]: Analyzing trace with hash 385619136, now seen corresponding path program 1 times [2020-12-22 08:09:23,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:23,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180461889] [2020-12-22 08:09:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:24,408 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 08:09:24,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180461889] [2020-12-22 08:09:24,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:24,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:09:24,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100718797] [2020-12-22 08:09:24,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:09:24,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:24,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:09:24,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:09:24,412 INFO L87 Difference]: Start difference. First operand 63348 states and 93893 transitions. Second operand 5 states. [2020-12-22 08:09:30,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:30,931 INFO L93 Difference]: Finished difference Result 185293 states and 274112 transitions. [2020-12-22 08:09:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:09:30,932 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 245 [2020-12-22 08:09:30,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:31,081 INFO L225 Difference]: With dead ends: 185293 [2020-12-22 08:09:31,082 INFO L226 Difference]: Without dead ends: 122526 [2020-12-22 08:09:31,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:09:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122526 states. [2020-12-22 08:09:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122526 to 122496. [2020-12-22 08:09:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122496 states. [2020-12-22 08:09:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122496 states to 122496 states and 179855 transitions. [2020-12-22 08:09:37,956 INFO L78 Accepts]: Start accepts. Automaton has 122496 states and 179855 transitions. Word has length 245 [2020-12-22 08:09:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:37,956 INFO L481 AbstractCegarLoop]: Abstraction has 122496 states and 179855 transitions. [2020-12-22 08:09:37,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:09:37,957 INFO L276 IsEmpty]: Start isEmpty. Operand 122496 states and 179855 transitions. [2020-12-22 08:09:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-12-22 08:09:38,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:38,317 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 08:09:38,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:09:38,318 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:38,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:38,318 INFO L82 PathProgramCache]: Analyzing trace with hash -889930704, now seen corresponding path program 1 times [2020-12-22 08:09:38,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:38,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529418328] [2020-12-22 08:09:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:38,836 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 08:09:38,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529418328] [2020-12-22 08:09:38,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:38,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:09:38,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48946976] [2020-12-22 08:09:38,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:09:38,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:38,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:09:38,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:09:38,845 INFO L87 Difference]: Start difference. First operand 122496 states and 179855 transitions. Second operand 4 states. [2020-12-22 08:09:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:47,015 INFO L93 Difference]: Finished difference Result 264465 states and 388227 transitions. [2020-12-22 08:09:47,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:09:47,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 247 [2020-12-22 08:09:47,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:47,204 INFO L225 Difference]: With dead ends: 264465 [2020-12-22 08:09:47,204 INFO L226 Difference]: Without dead ends: 143587 [2020-12-22 08:09:47,279 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 08:09:47,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143587 states. [2020-12-22 08:09:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143587 to 122731. [2020-12-22 08:09:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122731 states. [2020-12-22 08:09:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122731 states to 122731 states and 180041 transitions. [2020-12-22 08:09:55,009 INFO L78 Accepts]: Start accepts. Automaton has 122731 states and 180041 transitions. Word has length 247 [2020-12-22 08:09:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:55,009 INFO L481 AbstractCegarLoop]: Abstraction has 122731 states and 180041 transitions. [2020-12-22 08:09:55,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:09:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 122731 states and 180041 transitions. [2020-12-22 08:09:55,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-12-22 08:09:55,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:55,095 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, 1, 1] [2020-12-22 08:09:55,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:09:55,096 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:55,096 INFO L82 PathProgramCache]: Analyzing trace with hash -714840877, now seen corresponding path program 1 times [2020-12-22 08:09:55,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:55,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287591611] [2020-12-22 08:09:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:55,189 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 08:09:55,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287591611] [2020-12-22 08:09:55,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:55,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:09:55,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35402051] [2020-12-22 08:09:55,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:09:55,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:55,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:09:55,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:09:55,191 INFO L87 Difference]: Start difference. First operand 122731 states and 180041 transitions. Second operand 3 states. [2020-12-22 08:10:08,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:08,623 INFO L93 Difference]: Finished difference Result 361849 states and 530144 transitions. [2020-12-22 08:10:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:08,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 249 [2020-12-22 08:10:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:08,957 INFO L225 Difference]: With dead ends: 361849 [2020-12-22 08:10:08,957 INFO L226 Difference]: Without dead ends: 241596 [2020-12-22 08:10:09,063 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 08:10:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241596 states. [2020-12-22 08:10:17,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241596 to 123204. [2020-12-22 08:10:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123204 states. [2020-12-22 08:10:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123204 states to 123204 states and 180622 transitions. [2020-12-22 08:10:17,745 INFO L78 Accepts]: Start accepts. Automaton has 123204 states and 180622 transitions. Word has length 249 [2020-12-22 08:10:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:17,746 INFO L481 AbstractCegarLoop]: Abstraction has 123204 states and 180622 transitions. [2020-12-22 08:10:17,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 123204 states and 180622 transitions. [2020-12-22 08:10:17,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-22 08:10:17,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:17,852 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, 1, 1, 1] [2020-12-22 08:10:17,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:10:17,852 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:17,853 INFO L82 PathProgramCache]: Analyzing trace with hash 661953556, now seen corresponding path program 1 times [2020-12-22 08:10:17,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:17,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142124221] [2020-12-22 08:10:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:18,308 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 08:10:18,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142124221] [2020-12-22 08:10:18,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:18,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:18,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673658871] [2020-12-22 08:10:18,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:18,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:18,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:18,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:18,312 INFO L87 Difference]: Start difference. First operand 123204 states and 180622 transitions. Second operand 3 states. [2020-12-22 08:10:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:32,710 INFO L93 Difference]: Finished difference Result 364268 states and 533703 transitions. [2020-12-22 08:10:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:10:32,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 250 [2020-12-22 08:10:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:33,117 INFO L225 Difference]: With dead ends: 364268 [2020-12-22 08:10:33,118 INFO L226 Difference]: Without dead ends: 243653 [2020-12-22 08:10:33,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:33,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243653 states. [2020-12-22 08:10:42,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243653 to 123889. [2020-12-22 08:10:42,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123889 states. [2020-12-22 08:10:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123889 states to 123889 states and 181426 transitions. [2020-12-22 08:10:43,014 INFO L78 Accepts]: Start accepts. Automaton has 123889 states and 181426 transitions. Word has length 250 [2020-12-22 08:10:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:43,014 INFO L481 AbstractCegarLoop]: Abstraction has 123889 states and 181426 transitions. [2020-12-22 08:10:43,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:10:43,015 INFO L276 IsEmpty]: Start isEmpty. Operand 123889 states and 181426 transitions. [2020-12-22 08:10:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-22 08:10:43,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:43,107 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, 1, 1, 1, 1] [2020-12-22 08:10:43,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:10:43,108 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:43,108 INFO L82 PathProgramCache]: Analyzing trace with hash -608996931, now seen corresponding path program 1 times [2020-12-22 08:10:43,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:43,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653894676] [2020-12-22 08:10:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:43,286 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 08:10:43,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653894676] [2020-12-22 08:10:43,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:43,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:10:43,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622720247] [2020-12-22 08:10:43,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:10:43,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:43,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:10:43,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:10:43,289 INFO L87 Difference]: Start difference. First operand 123889 states and 181426 transitions. Second operand 3 states.