/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:07:03,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:07:03,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:07:03,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:07:03,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:07:03,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:07:03,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:07:03,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:07:03,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:07:03,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:07:03,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:07:03,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:07:03,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:07:03,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:07:03,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:07:03,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:07:03,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:07:03,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:07:03,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:07:03,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:07:03,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:07:03,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:07:03,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:07:03,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:07:03,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:07:03,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:07:03,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:07:03,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:07:03,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:07:03,602 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:07:03,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:07:03,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:07:03,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:07:03,606 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:07:03,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:07:03,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:07:03,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:07:03,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:07:03,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:07:03,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:07:03,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:07:03,609 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:07:03,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:07:03,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:07:03,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:07:03,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:07:03,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:07:03,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:07:03,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:07:03,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:07:03,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:07:03,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:07:03,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:07:03,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:07:03,612 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:07:04,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:07:04,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:07:04,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:07:04,081 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:07:04,082 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:07:04,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-12-22 09:07:04,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59caa24f2/6e9edf5c8dce40da87ca05399731dd31/FLAG25b7dfbba [2020-12-22 09:07:04,923 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:07:04,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-12-22 09:07:04,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59caa24f2/6e9edf5c8dce40da87ca05399731dd31/FLAG25b7dfbba [2020-12-22 09:07:05,099 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59caa24f2/6e9edf5c8dce40da87ca05399731dd31 [2020-12-22 09:07:05,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:07:05,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:07:05,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:07:05,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:07:05,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:07:05,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:07:05" (1/1) ... [2020-12-22 09:07:05,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68fe1098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:05, skipping insertion in model container [2020-12-22 09:07:05,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:07:05" (1/1) ... [2020-12-22 09:07:05,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:07:05,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:07:05,912 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26207,26220] [2020-12-22 09:07:06,006 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[30429,30442] [2020-12-22 09:07:06,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:07:06,274 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:07:06,459 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26207,26220] [2020-12-22 09:07:06,549 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[30429,30442] [2020-12-22 09:07:06,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:07:06,701 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:07:06,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:06 WrapperNode [2020-12-22 09:07:06,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:07:06,704 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:07:06,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:07:06,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:07:06,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:06" (1/1) ... [2020-12-22 09:07:06,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:06" (1/1) ... [2020-12-22 09:07:06,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:07:06,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:07:06,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:07:06,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:07:06,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:06" (1/1) ... [2020-12-22 09:07:06,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:06" (1/1) ... [2020-12-22 09:07:06,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:06" (1/1) ... [2020-12-22 09:07:06,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:06" (1/1) ... [2020-12-22 09:07:06,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:06" (1/1) ... [2020-12-22 09:07:06,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:06" (1/1) ... [2020-12-22 09:07:06,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:06" (1/1) ... [2020-12-22 09:07:07,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:07:07,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:07:07,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:07:07,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:07:07,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:07:07,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:07:07,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:07:07,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:07:07,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:07:09,753 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:07:09,753 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:07:09,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:07:09 BoogieIcfgContainer [2020-12-22 09:07:09,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:07:09,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:07:09,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:07:09,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:07:09,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:07:05" (1/3) ... [2020-12-22 09:07:09,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6714a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:07:09, skipping insertion in model container [2020-12-22 09:07:09,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:07:06" (2/3) ... [2020-12-22 09:07:09,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6714a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:07:09, skipping insertion in model container [2020-12-22 09:07:09,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:07:09" (3/3) ... [2020-12-22 09:07:09,765 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-12-22 09:07:09,772 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:07:09,778 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:07:09,822 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:07:09,854 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:07:09,855 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:07:09,855 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:07:09,855 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:07:09,855 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:07:09,855 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:07:09,856 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:07:09,856 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:07:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states. [2020-12-22 09:07:09,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-12-22 09:07:09,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:09,913 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 09:07:09,914 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:09,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:09,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1567561213, now seen corresponding path program 1 times [2020-12-22 09:07:09,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:09,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643676419] [2020-12-22 09:07:09,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:11,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643676419] [2020-12-22 09:07:11,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:11,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:07:11,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059526681] [2020-12-22 09:07:11,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:07:11,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:11,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:07:11,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:07:11,108 INFO L87 Difference]: Start difference. First operand 685 states. Second operand 4 states. [2020-12-22 09:07:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:11,418 INFO L93 Difference]: Finished difference Result 2016 states and 3602 transitions. [2020-12-22 09:07:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:11,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 247 [2020-12-22 09:07:11,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:11,459 INFO L225 Difference]: With dead ends: 2016 [2020-12-22 09:07:11,459 INFO L226 Difference]: Without dead ends: 1336 [2020-12-22 09:07:11,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2020-12-22 09:07:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1298. [2020-12-22 09:07:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1298 states. [2020-12-22 09:07:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2025 transitions. [2020-12-22 09:07:11,659 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2025 transitions. Word has length 247 [2020-12-22 09:07:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:11,662 INFO L481 AbstractCegarLoop]: Abstraction has 1298 states and 2025 transitions. [2020-12-22 09:07:11,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:07:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2025 transitions. [2020-12-22 09:07:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-12-22 09:07:11,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:11,699 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 09:07:11,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:07:11,700 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash -619024179, now seen corresponding path program 1 times [2020-12-22 09:07:11,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:11,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754524837] [2020-12-22 09:07:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:12,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754524837] [2020-12-22 09:07:12,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:12,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:12,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951549485] [2020-12-22 09:07:12,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:12,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:12,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:12,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:12,135 INFO L87 Difference]: Start difference. First operand 1298 states and 2025 transitions. Second operand 3 states. [2020-12-22 09:07:12,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:12,395 INFO L93 Difference]: Finished difference Result 3722 states and 5773 transitions. [2020-12-22 09:07:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:12,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 249 [2020-12-22 09:07:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:12,421 INFO L225 Difference]: With dead ends: 3722 [2020-12-22 09:07:12,421 INFO L226 Difference]: Without dead ends: 2549 [2020-12-22 09:07:12,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2020-12-22 09:07:12,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2513. [2020-12-22 09:07:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2513 states. [2020-12-22 09:07:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3905 transitions. [2020-12-22 09:07:12,603 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3905 transitions. Word has length 249 [2020-12-22 09:07:12,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:12,607 INFO L481 AbstractCegarLoop]: Abstraction has 2513 states and 3905 transitions. [2020-12-22 09:07:12,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3905 transitions. [2020-12-22 09:07:12,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-12-22 09:07:12,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:12,619 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 09:07:12,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:07:12,621 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:12,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:12,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1334674344, now seen corresponding path program 1 times [2020-12-22 09:07:12,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:12,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071215467] [2020-12-22 09:07:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:12,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071215467] [2020-12-22 09:07:12,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:12,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:12,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222046699] [2020-12-22 09:07:12,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:12,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:12,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:12,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:12,837 INFO L87 Difference]: Start difference. First operand 2513 states and 3905 transitions. Second operand 3 states. [2020-12-22 09:07:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:13,086 INFO L93 Difference]: Finished difference Result 7472 states and 11599 transitions. [2020-12-22 09:07:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:13,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 249 [2020-12-22 09:07:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:13,113 INFO L225 Difference]: With dead ends: 7472 [2020-12-22 09:07:13,114 INFO L226 Difference]: Without dead ends: 4997 [2020-12-22 09:07:13,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4997 states. [2020-12-22 09:07:13,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4997 to 2532. [2020-12-22 09:07:13,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2532 states. [2020-12-22 09:07:13,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 3933 transitions. [2020-12-22 09:07:13,381 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 3933 transitions. Word has length 249 [2020-12-22 09:07:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:13,382 INFO L481 AbstractCegarLoop]: Abstraction has 2532 states and 3933 transitions. [2020-12-22 09:07:13,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 3933 transitions. [2020-12-22 09:07:13,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-22 09:07:13,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:13,390 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 09:07:13,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:07:13,390 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:13,391 INFO L82 PathProgramCache]: Analyzing trace with hash -885150611, now seen corresponding path program 1 times [2020-12-22 09:07:13,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:13,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407485440] [2020-12-22 09:07:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:13,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407485440] [2020-12-22 09:07:13,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:13,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:13,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946087137] [2020-12-22 09:07:13,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:13,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:13,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:13,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:13,494 INFO L87 Difference]: Start difference. First operand 2532 states and 3933 transitions. Second operand 3 states. [2020-12-22 09:07:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:13,839 INFO L93 Difference]: Finished difference Result 7491 states and 11620 transitions. [2020-12-22 09:07:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:13,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 250 [2020-12-22 09:07:13,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:13,870 INFO L225 Difference]: With dead ends: 7491 [2020-12-22 09:07:13,870 INFO L226 Difference]: Without dead ends: 5015 [2020-12-22 09:07:13,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:13,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5015 states. [2020-12-22 09:07:14,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5015 to 2550. [2020-12-22 09:07:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2550 states. [2020-12-22 09:07:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3954 transitions. [2020-12-22 09:07:14,122 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3954 transitions. Word has length 250 [2020-12-22 09:07:14,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:14,122 INFO L481 AbstractCegarLoop]: Abstraction has 2550 states and 3954 transitions. [2020-12-22 09:07:14,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:14,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3954 transitions. [2020-12-22 09:07:14,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-22 09:07:14,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:14,130 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 09:07:14,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:07:14,131 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:14,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:14,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1254851346, now seen corresponding path program 1 times [2020-12-22 09:07:14,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:14,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931098241] [2020-12-22 09:07:14,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:14,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931098241] [2020-12-22 09:07:14,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:14,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:14,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573056098] [2020-12-22 09:07:14,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:14,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:14,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:14,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:14,427 INFO L87 Difference]: Start difference. First operand 2550 states and 3954 transitions. Second operand 3 states. [2020-12-22 09:07:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:14,787 INFO L93 Difference]: Finished difference Result 7222 states and 11133 transitions. [2020-12-22 09:07:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:14,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 251 [2020-12-22 09:07:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:14,814 INFO L225 Difference]: With dead ends: 7222 [2020-12-22 09:07:14,814 INFO L226 Difference]: Without dead ends: 4913 [2020-12-22 09:07:14,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2020-12-22 09:07:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 4879. [2020-12-22 09:07:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4879 states. [2020-12-22 09:07:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4879 states to 4879 states and 7514 transitions. [2020-12-22 09:07:15,180 INFO L78 Accepts]: Start accepts. Automaton has 4879 states and 7514 transitions. Word has length 251 [2020-12-22 09:07:15,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:15,181 INFO L481 AbstractCegarLoop]: Abstraction has 4879 states and 7514 transitions. [2020-12-22 09:07:15,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:15,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4879 states and 7514 transitions. [2020-12-22 09:07:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-22 09:07:15,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:15,195 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 09:07:15,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:07:15,196 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:15,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:15,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1748316267, now seen corresponding path program 1 times [2020-12-22 09:07:15,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:15,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573639379] [2020-12-22 09:07:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:15,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573639379] [2020-12-22 09:07:15,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:15,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:07:15,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665414908] [2020-12-22 09:07:15,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:07:15,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:15,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:07:15,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:15,700 INFO L87 Difference]: Start difference. First operand 4879 states and 7514 transitions. Second operand 5 states. [2020-12-22 09:07:16,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:16,417 INFO L93 Difference]: Finished difference Result 14170 states and 21765 transitions. [2020-12-22 09:07:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:16,418 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2020-12-22 09:07:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:16,462 INFO L225 Difference]: With dead ends: 14170 [2020-12-22 09:07:16,463 INFO L226 Difference]: Without dead ends: 9346 [2020-12-22 09:07:16,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:16,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9346 states. [2020-12-22 09:07:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9346 to 9318. [2020-12-22 09:07:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9318 states. [2020-12-22 09:07:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9318 states to 9318 states and 14215 transitions. [2020-12-22 09:07:17,087 INFO L78 Accepts]: Start accepts. Automaton has 9318 states and 14215 transitions. Word has length 251 [2020-12-22 09:07:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:17,087 INFO L481 AbstractCegarLoop]: Abstraction has 9318 states and 14215 transitions. [2020-12-22 09:07:17,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:07:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 9318 states and 14215 transitions. [2020-12-22 09:07:17,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-12-22 09:07:17,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:17,107 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, 1, 1] [2020-12-22 09:07:17,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:07:17,107 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:17,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:17,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1184733607, now seen corresponding path program 1 times [2020-12-22 09:07:17,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:17,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96312131] [2020-12-22 09:07:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:17,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96312131] [2020-12-22 09:07:17,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:17,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:07:17,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571480077] [2020-12-22 09:07:17,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:07:17,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:17,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:07:17,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:07:17,495 INFO L87 Difference]: Start difference. First operand 9318 states and 14215 transitions. Second operand 4 states. [2020-12-22 09:07:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:18,582 INFO L93 Difference]: Finished difference Result 27280 states and 41537 transitions. [2020-12-22 09:07:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:18,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 253 [2020-12-22 09:07:18,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:18,689 INFO L225 Difference]: With dead ends: 27280 [2020-12-22 09:07:18,690 INFO L226 Difference]: Without dead ends: 18159 [2020-12-22 09:07:18,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18159 states. [2020-12-22 09:07:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18159 to 18046. [2020-12-22 09:07:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18046 states. [2020-12-22 09:07:19,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18046 states to 18046 states and 27318 transitions. [2020-12-22 09:07:19,825 INFO L78 Accepts]: Start accepts. Automaton has 18046 states and 27318 transitions. Word has length 253 [2020-12-22 09:07:19,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:19,825 INFO L481 AbstractCegarLoop]: Abstraction has 18046 states and 27318 transitions. [2020-12-22 09:07:19,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:07:19,826 INFO L276 IsEmpty]: Start isEmpty. Operand 18046 states and 27318 transitions. [2020-12-22 09:07:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-12-22 09:07:19,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:19,864 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, 1, 1, 1, 1] [2020-12-22 09:07:19,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:07:19,865 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:19,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:19,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1131803781, now seen corresponding path program 1 times [2020-12-22 09:07:19,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:19,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097457754] [2020-12-22 09:07:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:20,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097457754] [2020-12-22 09:07:20,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:20,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:20,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684485246] [2020-12-22 09:07:20,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:20,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:20,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:20,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:20,023 INFO L87 Difference]: Start difference. First operand 18046 states and 27318 transitions. Second operand 3 states. [2020-12-22 09:07:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:21,971 INFO L93 Difference]: Finished difference Result 53618 states and 81118 transitions. [2020-12-22 09:07:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:21,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-12-22 09:07:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:22,050 INFO L225 Difference]: With dead ends: 53618 [2020-12-22 09:07:22,050 INFO L226 Difference]: Without dead ends: 35857 [2020-12-22 09:07:22,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35857 states. [2020-12-22 09:07:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35857 to 18176. [2020-12-22 09:07:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18176 states. [2020-12-22 09:07:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18176 states to 18176 states and 27508 transitions. [2020-12-22 09:07:23,111 INFO L78 Accepts]: Start accepts. Automaton has 18176 states and 27508 transitions. Word has length 255 [2020-12-22 09:07:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:23,112 INFO L481 AbstractCegarLoop]: Abstraction has 18176 states and 27508 transitions. [2020-12-22 09:07:23,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 18176 states and 27508 transitions. [2020-12-22 09:07:23,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-12-22 09:07:23,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:23,144 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, 1, 1, 1, 1] [2020-12-22 09:07:23,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:07:23,144 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:23,145 INFO L82 PathProgramCache]: Analyzing trace with hash -83560352, now seen corresponding path program 1 times [2020-12-22 09:07:23,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:23,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145023879] [2020-12-22 09:07:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:23,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145023879] [2020-12-22 09:07:23,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:23,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:23,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863775741] [2020-12-22 09:07:23,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:23,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:23,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:23,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:23,342 INFO L87 Difference]: Start difference. First operand 18176 states and 27508 transitions. Second operand 3 states. [2020-12-22 09:07:25,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:25,271 INFO L93 Difference]: Finished difference Result 52672 states and 79450 transitions. [2020-12-22 09:07:25,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:25,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-12-22 09:07:25,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:25,357 INFO L225 Difference]: With dead ends: 52672 [2020-12-22 09:07:25,357 INFO L226 Difference]: Without dead ends: 35519 [2020-12-22 09:07:25,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35519 states. [2020-12-22 09:07:26,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35519 to 35406. [2020-12-22 09:07:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35406 states. [2020-12-22 09:07:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35406 states to 35406 states and 53232 transitions. [2020-12-22 09:07:27,231 INFO L78 Accepts]: Start accepts. Automaton has 35406 states and 53232 transitions. Word has length 255 [2020-12-22 09:07:27,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:27,231 INFO L481 AbstractCegarLoop]: Abstraction has 35406 states and 53232 transitions. [2020-12-22 09:07:27,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:27,231 INFO L276 IsEmpty]: Start isEmpty. Operand 35406 states and 53232 transitions. [2020-12-22 09:07:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-22 09:07:27,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:27,313 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, 1, 1, 1, 1, 1] [2020-12-22 09:07:27,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:07:27,313 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:27,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:27,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1772207104, now seen corresponding path program 1 times [2020-12-22 09:07:27,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:27,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248972572] [2020-12-22 09:07:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:27,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248972572] [2020-12-22 09:07:27,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:27,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:27,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898497838] [2020-12-22 09:07:27,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:27,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:27,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:27,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:27,430 INFO L87 Difference]: Start difference. First operand 35406 states and 53232 transitions. Second operand 3 states. [2020-12-22 09:07:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:30,630 INFO L93 Difference]: Finished difference Result 104964 states and 157628 transitions. [2020-12-22 09:07:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:30,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 256 [2020-12-22 09:07:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:30,775 INFO L225 Difference]: With dead ends: 104964 [2020-12-22 09:07:30,775 INFO L226 Difference]: Without dead ends: 70241 [2020-12-22 09:07:30,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:30,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70241 states. [2020-12-22 09:07:32,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70241 to 35568. [2020-12-22 09:07:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35568 states. [2020-12-22 09:07:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35568 states to 35568 states and 53418 transitions. [2020-12-22 09:07:32,928 INFO L78 Accepts]: Start accepts. Automaton has 35568 states and 53418 transitions. Word has length 256 [2020-12-22 09:07:32,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:32,928 INFO L481 AbstractCegarLoop]: Abstraction has 35568 states and 53418 transitions. [2020-12-22 09:07:32,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 35568 states and 53418 transitions. [2020-12-22 09:07:32,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-12-22 09:07:32,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:32,965 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:32,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:07:32,965 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:32,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:32,966 INFO L82 PathProgramCache]: Analyzing trace with hash 170933055, now seen corresponding path program 1 times [2020-12-22 09:07:32,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:32,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647746655] [2020-12-22 09:07:32,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:33,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647746655] [2020-12-22 09:07:33,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:33,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:33,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100939900] [2020-12-22 09:07:33,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:33,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:33,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:33,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:33,096 INFO L87 Difference]: Start difference. First operand 35568 states and 53418 transitions. Second operand 3 states. [2020-12-22 09:07:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:35,769 INFO L93 Difference]: Finished difference Result 71439 states and 108234 transitions. [2020-12-22 09:07:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:35,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 257 [2020-12-22 09:07:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:35,828 INFO L225 Difference]: With dead ends: 71439 [2020-12-22 09:07:35,828 INFO L226 Difference]: Without dead ends: 47742 [2020-12-22 09:07:35,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:35,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47742 states. [2020-12-22 09:07:38,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47742 to 43024. [2020-12-22 09:07:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43024 states. [2020-12-22 09:07:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43024 states to 43024 states and 65578 transitions. [2020-12-22 09:07:38,114 INFO L78 Accepts]: Start accepts. Automaton has 43024 states and 65578 transitions. Word has length 257 [2020-12-22 09:07:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:38,114 INFO L481 AbstractCegarLoop]: Abstraction has 43024 states and 65578 transitions. [2020-12-22 09:07:38,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 43024 states and 65578 transitions. [2020-12-22 09:07:38,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-12-22 09:07:38,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:38,150 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:38,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:07:38,150 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:38,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:38,151 INFO L82 PathProgramCache]: Analyzing trace with hash -537370011, now seen corresponding path program 1 times [2020-12-22 09:07:38,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:38,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059192771] [2020-12-22 09:07:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:38,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059192771] [2020-12-22 09:07:38,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:38,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:38,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864068448] [2020-12-22 09:07:38,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:38,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:38,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:38,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:38,361 INFO L87 Difference]: Start difference. First operand 43024 states and 65578 transitions. Second operand 3 states. [2020-12-22 09:07:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:43,067 INFO L93 Difference]: Finished difference Result 125264 states and 190540 transitions. [2020-12-22 09:07:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:43,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 257 [2020-12-22 09:07:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:43,173 INFO L225 Difference]: With dead ends: 125264 [2020-12-22 09:07:43,173 INFO L226 Difference]: Without dead ends: 83783 [2020-12-22 09:07:43,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83783 states. [2020-12-22 09:07:47,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83783 to 83670. [2020-12-22 09:07:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83670 states. [2020-12-22 09:07:47,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83670 states to 83670 states and 126644 transitions. [2020-12-22 09:07:47,866 INFO L78 Accepts]: Start accepts. Automaton has 83670 states and 126644 transitions. Word has length 257 [2020-12-22 09:07:47,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:47,866 INFO L481 AbstractCegarLoop]: Abstraction has 83670 states and 126644 transitions. [2020-12-22 09:07:47,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 83670 states and 126644 transitions. [2020-12-22 09:07:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-12-22 09:07:47,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:47,942 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:47,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:07:47,942 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:47,943 INFO L82 PathProgramCache]: Analyzing trace with hash -8385240, now seen corresponding path program 1 times [2020-12-22 09:07:47,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:47,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219948312] [2020-12-22 09:07:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:48,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219948312] [2020-12-22 09:07:48,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:48,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:07:48,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053178424] [2020-12-22 09:07:48,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:07:48,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:48,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:07:48,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:48,312 INFO L87 Difference]: Start difference. First operand 83670 states and 126644 transitions. Second operand 5 states. [2020-12-22 09:07:57,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:57,265 INFO L93 Difference]: Finished difference Result 245377 states and 370936 transitions. [2020-12-22 09:07:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:57,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 257 [2020-12-22 09:07:57,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:57,488 INFO L225 Difference]: With dead ends: 245377 [2020-12-22 09:07:57,488 INFO L226 Difference]: Without dead ends: 162326 [2020-12-22 09:07:57,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162326 states. [2020-12-22 09:08:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162326 to 162300. [2020-12-22 09:08:06,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162300 states. [2020-12-22 09:08:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162300 states to 162300 states and 243684 transitions. [2020-12-22 09:08:07,126 INFO L78 Accepts]: Start accepts. Automaton has 162300 states and 243684 transitions. Word has length 257 [2020-12-22 09:08:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:07,127 INFO L481 AbstractCegarLoop]: Abstraction has 162300 states and 243684 transitions. [2020-12-22 09:08:07,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:08:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 162300 states and 243684 transitions. [2020-12-22 09:08:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-12-22 09:08:07,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:07,317 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:07,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:08:07,318 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:07,319 INFO L82 PathProgramCache]: Analyzing trace with hash -149639773, now seen corresponding path program 1 times [2020-12-22 09:08:07,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:07,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609104450] [2020-12-22 09:08:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:07,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609104450] [2020-12-22 09:08:07,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:07,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:07,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974602516] [2020-12-22 09:08:07,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:07,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:07,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:07,880 INFO L87 Difference]: Start difference. First operand 162300 states and 243684 transitions. Second operand 3 states. [2020-12-22 09:08:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:24,001 INFO L93 Difference]: Finished difference Result 471675 states and 705870 transitions. [2020-12-22 09:08:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:24,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 259 [2020-12-22 09:08:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:24,645 INFO L225 Difference]: With dead ends: 471675 [2020-12-22 09:08:24,646 INFO L226 Difference]: Without dead ends: 315884 [2020-12-22 09:08:24,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:25,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315884 states. [2020-12-22 09:08:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315884 to 315860. [2020-12-22 09:08:42,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315860 states. [2020-12-22 09:08:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315860 states to 315860 states and 470342 transitions. [2020-12-22 09:08:43,448 INFO L78 Accepts]: Start accepts. Automaton has 315860 states and 470342 transitions. Word has length 259 [2020-12-22 09:08:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:43,448 INFO L481 AbstractCegarLoop]: Abstraction has 315860 states and 470342 transitions. [2020-12-22 09:08:43,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 315860 states and 470342 transitions. [2020-12-22 09:08:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-12-22 09:08:43,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:43,650 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:43,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:08:43,651 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:43,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:43,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1795042598, now seen corresponding path program 1 times [2020-12-22 09:08:43,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:43,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260092287] [2020-12-22 09:08:43,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat