/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_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:36:04,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:36:04,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:36:04,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:36:04,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:36:04,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:36:04,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:36:04,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:36:04,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:36:04,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:36:04,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:36:04,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:36:04,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:36:04,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:36:04,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:36:04,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:36:04,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:36:04,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:36:04,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:36:04,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:36:04,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:36:04,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:36:04,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:36:04,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:36:04,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:36:04,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:36:04,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:36:04,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:36:04,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:36:04,690 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:36:04,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:36:04,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:36:04,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:36:04,694 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:36:04,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:36:04,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:36:04,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:36:04,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:36:04,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:36:04,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:36:04,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:36:04,698 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:36:04,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:36:04,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:36:04,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:36:04,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:36:04,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:36:04,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:36:04,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:36:04,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:36:04,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:36:04,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:36:04,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:36:04,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:36:04,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:36:05,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:36:05,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:36:05,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:36:05,161 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:36:05,161 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:36:05,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:36:05,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdf4026de/c6fe6516fb6c4aeeac7688fc4d94fe78/FLAGde0f027aa [2020-12-22 08:36:05,957 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:36:05,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:36:05,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdf4026de/c6fe6516fb6c4aeeac7688fc4d94fe78/FLAGde0f027aa [2020-12-22 08:36:06,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdf4026de/c6fe6516fb6c4aeeac7688fc4d94fe78 [2020-12-22 08:36:06,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:36:06,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:36:06,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:36:06,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:36:06,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:36:06,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:36:06" (1/1) ... [2020-12-22 08:36:06,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@211ad354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:06, skipping insertion in model container [2020-12-22 08:36:06,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:36:06" (1/1) ... [2020-12-22 08:36:06,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:36:06,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:36:06,717 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_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[6778,6791] [2020-12-22 08:36:06,738 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_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[9109,9122] [2020-12-22 08:36:06,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:36:06,764 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:36:06,849 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_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[6778,6791] [2020-12-22 08:36:06,874 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_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[9109,9122] [2020-12-22 08:36:06,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:36:06,931 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:36:06,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:06 WrapperNode [2020-12-22 08:36:06,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:36:06,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:36:06,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:36:06,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:36:06,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:06" (1/1) ... [2020-12-22 08:36:06,954 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:06" (1/1) ... [2020-12-22 08:36:06,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:36:06,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:36:06,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:36:06,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:36:07,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:06" (1/1) ... [2020-12-22 08:36:07,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:06" (1/1) ... [2020-12-22 08:36:07,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:06" (1/1) ... [2020-12-22 08:36:07,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:06" (1/1) ... [2020-12-22 08:36:07,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:06" (1/1) ... [2020-12-22 08:36:07,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:06" (1/1) ... [2020-12-22 08:36:07,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:06" (1/1) ... [2020-12-22 08:36:07,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:36:07,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:36:07,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:36:07,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:36:07,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:06" (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 08:36:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:36:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:36:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:36:07,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:36:07,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:36:07,886 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:36:07,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:36:07 BoogieIcfgContainer [2020-12-22 08:36:07,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:36:07,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:36:07,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:36:07,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:36:07,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:36:06" (1/3) ... [2020-12-22 08:36:07,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44732632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:36:07, skipping insertion in model container [2020-12-22 08:36:07,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:06" (2/3) ... [2020-12-22 08:36:07,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44732632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:36:07, skipping insertion in model container [2020-12-22 08:36:07,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:36:07" (3/3) ... [2020-12-22 08:36:07,897 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:36:07,904 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:36:07,909 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 08:36:07,930 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 08:36:07,959 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:36:07,960 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:36:07,960 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:36:07,960 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:36:07,960 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:36:07,960 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:36:07,961 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:36:07,961 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:36:07,979 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2020-12-22 08:36:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 08:36:07,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:07,989 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] [2020-12-22 08:36:07,989 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1038847250, now seen corresponding path program 1 times [2020-12-22 08:36:08,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:08,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393461362] [2020-12-22 08:36:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:08,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393461362] [2020-12-22 08:36:08,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:08,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:36:08,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091328585] [2020-12-22 08:36:08,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:36:08,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:08,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:36:08,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:36:08,562 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 3 states. [2020-12-22 08:36:08,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:08,722 INFO L93 Difference]: Finished difference Result 204 states and 332 transitions. [2020-12-22 08:36:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:36:08,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 08:36:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:08,737 INFO L225 Difference]: With dead ends: 204 [2020-12-22 08:36:08,737 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 08:36:08,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:36:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 08:36:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2020-12-22 08:36:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-22 08:36:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 212 transitions. [2020-12-22 08:36:08,798 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 212 transitions. Word has length 48 [2020-12-22 08:36:08,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:08,799 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 212 transitions. [2020-12-22 08:36:08,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:36:08,799 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 212 transitions. [2020-12-22 08:36:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:36:08,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:08,801 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] [2020-12-22 08:36:08,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:36:08,802 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:08,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1964840261, now seen corresponding path program 1 times [2020-12-22 08:36:08,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:08,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349655463] [2020-12-22 08:36:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:08,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349655463] [2020-12-22 08:36:08,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:08,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:36:08,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935432856] [2020-12-22 08:36:08,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:36:08,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:08,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:36:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:36:08,992 INFO L87 Difference]: Start difference. First operand 151 states and 212 transitions. Second operand 3 states. [2020-12-22 08:36:09,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:09,094 INFO L93 Difference]: Finished difference Result 276 states and 401 transitions. [2020-12-22 08:36:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:36:09,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 08:36:09,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:09,097 INFO L225 Difference]: With dead ends: 276 [2020-12-22 08:36:09,098 INFO L226 Difference]: Without dead ends: 195 [2020-12-22 08:36:09,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:36:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-22 08:36:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2020-12-22 08:36:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-22 08:36:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 275 transitions. [2020-12-22 08:36:09,125 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 275 transitions. Word has length 49 [2020-12-22 08:36:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:09,125 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 275 transitions. [2020-12-22 08:36:09,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:36:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 275 transitions. [2020-12-22 08:36:09,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:36:09,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:09,128 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] [2020-12-22 08:36:09,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:36:09,128 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:09,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1398279763, now seen corresponding path program 1 times [2020-12-22 08:36:09,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:09,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584175067] [2020-12-22 08:36:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:09,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584175067] [2020-12-22 08:36:09,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:09,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:36:09,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178207808] [2020-12-22 08:36:09,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:36:09,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:09,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:36:09,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:09,275 INFO L87 Difference]: Start difference. First operand 193 states and 275 transitions. Second operand 5 states. [2020-12-22 08:36:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:09,536 INFO L93 Difference]: Finished difference Result 509 states and 745 transitions. [2020-12-22 08:36:09,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:36:09,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-12-22 08:36:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:09,540 INFO L225 Difference]: With dead ends: 509 [2020-12-22 08:36:09,540 INFO L226 Difference]: Without dead ends: 339 [2020-12-22 08:36:09,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:36:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-22 08:36:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 334. [2020-12-22 08:36:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-12-22 08:36:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 487 transitions. [2020-12-22 08:36:09,586 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 487 transitions. Word has length 50 [2020-12-22 08:36:09,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:09,587 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 487 transitions. [2020-12-22 08:36:09,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:36:09,588 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 487 transitions. [2020-12-22 08:36:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:36:09,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:09,591 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] [2020-12-22 08:36:09,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:36:09,591 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:09,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:09,592 INFO L82 PathProgramCache]: Analyzing trace with hash -953763925, now seen corresponding path program 1 times [2020-12-22 08:36:09,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:09,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017517792] [2020-12-22 08:36:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:09,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017517792] [2020-12-22 08:36:09,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:09,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:36:09,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435289512] [2020-12-22 08:36:09,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:36:09,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:09,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:36:09,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:09,680 INFO L87 Difference]: Start difference. First operand 334 states and 487 transitions. Second operand 5 states. [2020-12-22 08:36:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:09,817 INFO L93 Difference]: Finished difference Result 637 states and 941 transitions. [2020-12-22 08:36:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:36:09,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-22 08:36:09,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:09,820 INFO L225 Difference]: With dead ends: 637 [2020-12-22 08:36:09,820 INFO L226 Difference]: Without dead ends: 334 [2020-12-22 08:36:09,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:36:09,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-22 08:36:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2020-12-22 08:36:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-12-22 08:36:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 480 transitions. [2020-12-22 08:36:09,881 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 480 transitions. Word has length 51 [2020-12-22 08:36:09,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:09,882 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 480 transitions. [2020-12-22 08:36:09,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:36:09,882 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 480 transitions. [2020-12-22 08:36:09,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:36:09,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:09,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:36:09,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:36:09,889 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:09,890 INFO L82 PathProgramCache]: Analyzing trace with hash -380697261, now seen corresponding path program 1 times [2020-12-22 08:36:09,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:09,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584310233] [2020-12-22 08:36:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:10,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584310233] [2020-12-22 08:36:10,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:10,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:36:10,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943329149] [2020-12-22 08:36:10,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:36:10,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:10,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:36:10,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:10,032 INFO L87 Difference]: Start difference. First operand 334 states and 480 transitions. Second operand 5 states. [2020-12-22 08:36:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:10,166 INFO L93 Difference]: Finished difference Result 641 states and 932 transitions. [2020-12-22 08:36:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:36:10,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-22 08:36:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:10,171 INFO L225 Difference]: With dead ends: 641 [2020-12-22 08:36:10,172 INFO L226 Difference]: Without dead ends: 334 [2020-12-22 08:36:10,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:36:10,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-22 08:36:10,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2020-12-22 08:36:10,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-12-22 08:36:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 473 transitions. [2020-12-22 08:36:10,209 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 473 transitions. Word has length 52 [2020-12-22 08:36:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:10,211 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 473 transitions. [2020-12-22 08:36:10,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:36:10,212 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 473 transitions. [2020-12-22 08:36:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:36:10,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:10,218 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] [2020-12-22 08:36:10,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:36:10,218 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash -154878177, now seen corresponding path program 1 times [2020-12-22 08:36:10,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:10,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265141228] [2020-12-22 08:36:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:10,358 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 08:36:10,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265141228] [2020-12-22 08:36:10,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:10,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:36:10,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700696202] [2020-12-22 08:36:10,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:36:10,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:10,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:36:10,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:10,363 INFO L87 Difference]: Start difference. First operand 334 states and 473 transitions. Second operand 5 states. [2020-12-22 08:36:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:10,535 INFO L93 Difference]: Finished difference Result 1105 states and 1600 transitions. [2020-12-22 08:36:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:36:10,535 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 08:36:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:10,540 INFO L225 Difference]: With dead ends: 1105 [2020-12-22 08:36:10,541 INFO L226 Difference]: Without dead ends: 871 [2020-12-22 08:36:10,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2020-12-22 08:36:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 511. [2020-12-22 08:36:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-12-22 08:36:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 733 transitions. [2020-12-22 08:36:10,601 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 733 transitions. Word has length 53 [2020-12-22 08:36:10,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:10,601 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 733 transitions. [2020-12-22 08:36:10,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:36:10,602 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 733 transitions. [2020-12-22 08:36:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:36:10,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:10,603 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] [2020-12-22 08:36:10,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:36:10,605 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:10,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:10,609 INFO L82 PathProgramCache]: Analyzing trace with hash -27056057, now seen corresponding path program 1 times [2020-12-22 08:36:10,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:10,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723017260] [2020-12-22 08:36:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:10,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723017260] [2020-12-22 08:36:10,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:10,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:36:10,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498175190] [2020-12-22 08:36:10,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:36:10,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:10,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:36:10,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:10,752 INFO L87 Difference]: Start difference. First operand 511 states and 733 transitions. Second operand 5 states. [2020-12-22 08:36:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:10,927 INFO L93 Difference]: Finished difference Result 1262 states and 1830 transitions. [2020-12-22 08:36:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:36:10,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 08:36:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:10,935 INFO L225 Difference]: With dead ends: 1262 [2020-12-22 08:36:10,935 INFO L226 Difference]: Without dead ends: 1028 [2020-12-22 08:36:10,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2020-12-22 08:36:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 767. [2020-12-22 08:36:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2020-12-22 08:36:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1106 transitions. [2020-12-22 08:36:11,014 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1106 transitions. Word has length 53 [2020-12-22 08:36:11,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:11,014 INFO L481 AbstractCegarLoop]: Abstraction has 767 states and 1106 transitions. [2020-12-22 08:36:11,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:36:11,015 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1106 transitions. [2020-12-22 08:36:11,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:36:11,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:11,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:36:11,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:36:11,016 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:11,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:11,017 INFO L82 PathProgramCache]: Analyzing trace with hash 477975091, now seen corresponding path program 1 times [2020-12-22 08:36:11,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:11,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636305167] [2020-12-22 08:36:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:11,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636305167] [2020-12-22 08:36:11,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:11,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:36:11,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636063709] [2020-12-22 08:36:11,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:36:11,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:11,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:36:11,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:11,099 INFO L87 Difference]: Start difference. First operand 767 states and 1106 transitions. Second operand 5 states. [2020-12-22 08:36:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:11,305 INFO L93 Difference]: Finished difference Result 1468 states and 2134 transitions. [2020-12-22 08:36:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:36:11,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 08:36:11,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:11,312 INFO L225 Difference]: With dead ends: 1468 [2020-12-22 08:36:11,313 INFO L226 Difference]: Without dead ends: 1234 [2020-12-22 08:36:11,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:11,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2020-12-22 08:36:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 938. [2020-12-22 08:36:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 08:36:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1359 transitions. [2020-12-22 08:36:11,414 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1359 transitions. Word has length 53 [2020-12-22 08:36:11,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:11,415 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1359 transitions. [2020-12-22 08:36:11,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:36:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1359 transitions. [2020-12-22 08:36:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:36:11,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:11,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:36:11,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:36:11,417 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:11,417 INFO L82 PathProgramCache]: Analyzing trace with hash -680909608, now seen corresponding path program 1 times [2020-12-22 08:36:11,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:11,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828525598] [2020-12-22 08:36:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:11,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828525598] [2020-12-22 08:36:11,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:11,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:36:11,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969623911] [2020-12-22 08:36:11,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:36:11,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:11,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:36:11,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:36:11,647 INFO L87 Difference]: Start difference. First operand 938 states and 1359 transitions. Second operand 9 states. [2020-12-22 08:36:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:12,385 INFO L93 Difference]: Finished difference Result 2607 states and 3810 transitions. [2020-12-22 08:36:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 08:36:12,385 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-12-22 08:36:12,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:12,395 INFO L225 Difference]: With dead ends: 2607 [2020-12-22 08:36:12,395 INFO L226 Difference]: Without dead ends: 1771 [2020-12-22 08:36:12,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:36:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2020-12-22 08:36:12,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 938. [2020-12-22 08:36:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 08:36:12,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1358 transitions. [2020-12-22 08:36:12,545 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1358 transitions. Word has length 54 [2020-12-22 08:36:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:12,545 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1358 transitions. [2020-12-22 08:36:12,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:36:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1358 transitions. [2020-12-22 08:36:12,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:36:12,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:12,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:36:12,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:36:12,547 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:12,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:12,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1757672516, now seen corresponding path program 1 times [2020-12-22 08:36:12,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:12,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304475686] [2020-12-22 08:36:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:12,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304475686] [2020-12-22 08:36:12,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:12,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:36:12,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183164218] [2020-12-22 08:36:12,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:36:12,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:12,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:36:12,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:36:12,804 INFO L87 Difference]: Start difference. First operand 938 states and 1358 transitions. Second operand 10 states. [2020-12-22 08:36:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:13,855 INFO L93 Difference]: Finished difference Result 2436 states and 3541 transitions. [2020-12-22 08:36:13,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 08:36:13,856 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-12-22 08:36:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:13,864 INFO L225 Difference]: With dead ends: 2436 [2020-12-22 08:36:13,865 INFO L226 Difference]: Without dead ends: 1588 [2020-12-22 08:36:13,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:36:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2020-12-22 08:36:14,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 938. [2020-12-22 08:36:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 08:36:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1355 transitions. [2020-12-22 08:36:14,028 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1355 transitions. Word has length 54 [2020-12-22 08:36:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:14,028 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1355 transitions. [2020-12-22 08:36:14,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:36:14,029 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1355 transitions. [2020-12-22 08:36:14,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:36:14,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:14,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:36:14,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:36:14,030 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:14,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:14,031 INFO L82 PathProgramCache]: Analyzing trace with hash -728953036, now seen corresponding path program 1 times [2020-12-22 08:36:14,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:14,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128929241] [2020-12-22 08:36:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:14,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128929241] [2020-12-22 08:36:14,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:14,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:36:14,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418479628] [2020-12-22 08:36:14,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:36:14,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:14,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:36:14,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:36:14,229 INFO L87 Difference]: Start difference. First operand 938 states and 1355 transitions. Second operand 10 states. [2020-12-22 08:36:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:15,191 INFO L93 Difference]: Finished difference Result 2659 states and 3859 transitions. [2020-12-22 08:36:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:36:15,192 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-12-22 08:36:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:15,202 INFO L225 Difference]: With dead ends: 2659 [2020-12-22 08:36:15,202 INFO L226 Difference]: Without dead ends: 1826 [2020-12-22 08:36:15,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:36:15,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2020-12-22 08:36:15,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 938. [2020-12-22 08:36:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 08:36:15,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1349 transitions. [2020-12-22 08:36:15,352 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1349 transitions. Word has length 55 [2020-12-22 08:36:15,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:15,353 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1349 transitions. [2020-12-22 08:36:15,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:36:15,353 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1349 transitions. [2020-12-22 08:36:15,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:36:15,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:15,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:36:15,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:36:15,354 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:15,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:15,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2014195720, now seen corresponding path program 1 times [2020-12-22 08:36:15,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:15,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291890246] [2020-12-22 08:36:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:16,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291890246] [2020-12-22 08:36:16,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:16,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-12-22 08:36:16,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916842422] [2020-12-22 08:36:16,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 08:36:16,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 08:36:16,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:36:16,145 INFO L87 Difference]: Start difference. First operand 938 states and 1349 transitions. Second operand 22 states. [2020-12-22 08:36:16,455 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-12-22 08:36:17,317 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 08:36:17,569 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-12-22 08:36:17,860 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-12-22 08:36:18,220 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2020-12-22 08:36:18,402 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:36:18,579 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:36:18,735 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 08:36:19,094 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-22 08:36:19,296 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:36:19,485 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:36:19,679 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-22 08:36:19,882 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-12-22 08:36:21,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:21,628 INFO L93 Difference]: Finished difference Result 3468 states and 5047 transitions. [2020-12-22 08:36:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 08:36:21,629 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2020-12-22 08:36:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:21,646 INFO L225 Difference]: With dead ends: 3468 [2020-12-22 08:36:21,646 INFO L226 Difference]: Without dead ends: 3225 [2020-12-22 08:36:21,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=411, Invalid=1659, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 08:36:21,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2020-12-22 08:36:21,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 938. [2020-12-22 08:36:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 08:36:21,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1348 transitions. [2020-12-22 08:36:21,860 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1348 transitions. Word has length 56 [2020-12-22 08:36:21,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:21,860 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1348 transitions. [2020-12-22 08:36:21,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 08:36:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1348 transitions. [2020-12-22 08:36:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:36:21,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:21,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:36:21,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:36:21,862 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:21,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1797287643, now seen corresponding path program 1 times [2020-12-22 08:36:21,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:21,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156603775] [2020-12-22 08:36:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:22,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156603775] [2020-12-22 08:36:22,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:22,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 08:36:22,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728713836] [2020-12-22 08:36:22,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:36:22,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:36:22,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:36:22,624 INFO L87 Difference]: Start difference. First operand 938 states and 1348 transitions. Second operand 21 states. [2020-12-22 08:36:22,851 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-12-22 08:36:23,433 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 08:36:23,639 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 08:36:23,873 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 08:36:24,165 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-12-22 08:36:24,314 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:36:24,463 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:36:24,906 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 08:36:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:26,912 INFO L93 Difference]: Finished difference Result 3408 states and 4961 transitions. [2020-12-22 08:36:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 08:36:26,913 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-12-22 08:36:26,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:26,929 INFO L225 Difference]: With dead ends: 3408 [2020-12-22 08:36:26,929 INFO L226 Difference]: Without dead ends: 2999 [2020-12-22 08:36:26,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=294, Invalid=1188, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 08:36:26,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2020-12-22 08:36:27,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 943. [2020-12-22 08:36:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2020-12-22 08:36:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1353 transitions. [2020-12-22 08:36:27,109 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1353 transitions. Word has length 56 [2020-12-22 08:36:27,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:27,110 INFO L481 AbstractCegarLoop]: Abstraction has 943 states and 1353 transitions. [2020-12-22 08:36:27,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 08:36:27,110 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1353 transitions. [2020-12-22 08:36:27,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:36:27,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:27,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:36:27,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:36:27,112 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:27,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:27,112 INFO L82 PathProgramCache]: Analyzing trace with hash 929811098, now seen corresponding path program 1 times [2020-12-22 08:36:27,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:27,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643279917] [2020-12-22 08:36:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:27,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643279917] [2020-12-22 08:36:27,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:27,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 08:36:27,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663310017] [2020-12-22 08:36:27,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:36:27,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:27,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:36:27,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:36:27,857 INFO L87 Difference]: Start difference. First operand 943 states and 1353 transitions. Second operand 21 states. [2020-12-22 08:36:28,880 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-12-22 08:36:31,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:31,707 INFO L93 Difference]: Finished difference Result 4597 states and 6723 transitions. [2020-12-22 08:36:31,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 08:36:31,707 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-12-22 08:36:31,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:31,727 INFO L225 Difference]: With dead ends: 4597 [2020-12-22 08:36:31,727 INFO L226 Difference]: Without dead ends: 4188 [2020-12-22 08:36:31,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 08:36:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2020-12-22 08:36:31,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 943. [2020-12-22 08:36:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2020-12-22 08:36:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1351 transitions. [2020-12-22 08:36:31,924 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1351 transitions. Word has length 56 [2020-12-22 08:36:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:31,924 INFO L481 AbstractCegarLoop]: Abstraction has 943 states and 1351 transitions. [2020-12-22 08:36:31,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 08:36:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1351 transitions. [2020-12-22 08:36:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:36:31,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:31,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:36:31,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:36:31,926 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:31,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:31,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1026982439, now seen corresponding path program 1 times [2020-12-22 08:36:31,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:31,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505099423] [2020-12-22 08:36:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:32,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505099423] [2020-12-22 08:36:32,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:32,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 08:36:32,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581011664] [2020-12-22 08:36:32,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:36:32,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:32,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:36:32,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:36:32,681 INFO L87 Difference]: Start difference. First operand 943 states and 1351 transitions. Second operand 21 states. [2020-12-22 08:36:32,865 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-22 08:36:33,626 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-22 08:36:33,821 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-22 08:36:34,078 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-12-22 08:36:34,228 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:36:34,373 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:36:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:37,375 INFO L93 Difference]: Finished difference Result 4789 states and 7005 transitions. [2020-12-22 08:36:37,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 08:36:37,376 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-12-22 08:36:37,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:37,396 INFO L225 Difference]: With dead ends: 4789 [2020-12-22 08:36:37,397 INFO L226 Difference]: Without dead ends: 4386 [2020-12-22 08:36:37,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=316, Invalid=1490, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 08:36:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2020-12-22 08:36:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 948. [2020-12-22 08:36:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 948 states. [2020-12-22 08:36:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1357 transitions. [2020-12-22 08:36:37,633 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1357 transitions. Word has length 56 [2020-12-22 08:36:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:37,634 INFO L481 AbstractCegarLoop]: Abstraction has 948 states and 1357 transitions. [2020-12-22 08:36:37,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 08:36:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1357 transitions. [2020-12-22 08:36:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:36:37,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:37,637 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] [2020-12-22 08:36:37,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:36:37,638 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:37,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:37,639 INFO L82 PathProgramCache]: Analyzing trace with hash 788720349, now seen corresponding path program 1 times [2020-12-22 08:36:37,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:37,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353630122] [2020-12-22 08:36:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:38,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353630122] [2020-12-22 08:36:38,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:38,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 08:36:38,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968850724] [2020-12-22 08:36:38,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:36:38,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:38,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:36:38,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:36:38,099 INFO L87 Difference]: Start difference. First operand 948 states and 1357 transitions. Second operand 12 states. [2020-12-22 08:36:38,586 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 08:36:38,784 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-12-22 08:36:39,004 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-12-22 08:36:39,392 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-12-22 08:36:39,682 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 08:36:39,875 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 08:36:40,323 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 08:36:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:40,830 INFO L93 Difference]: Finished difference Result 2777 states and 4037 transitions. [2020-12-22 08:36:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 08:36:40,831 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-12-22 08:36:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:40,841 INFO L225 Difference]: With dead ends: 2777 [2020-12-22 08:36:40,842 INFO L226 Difference]: Without dead ends: 2341 [2020-12-22 08:36:40,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-12-22 08:36:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2020-12-22 08:36:41,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 915. [2020-12-22 08:36:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 915 states. [2020-12-22 08:36:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1314 transitions. [2020-12-22 08:36:41,069 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1314 transitions. Word has length 57 [2020-12-22 08:36:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:41,069 INFO L481 AbstractCegarLoop]: Abstraction has 915 states and 1314 transitions. [2020-12-22 08:36:41,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:36:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1314 transitions. [2020-12-22 08:36:41,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:36:41,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:41,070 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] [2020-12-22 08:36:41,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:36:41,070 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:41,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:41,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1168073188, now seen corresponding path program 1 times [2020-12-22 08:36:41,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:41,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822880482] [2020-12-22 08:36:41,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:41,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822880482] [2020-12-22 08:36:41,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:41,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-12-22 08:36:41,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110527577] [2020-12-22 08:36:41,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 08:36:41,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:41,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 08:36:41,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:36:41,653 INFO L87 Difference]: Start difference. First operand 915 states and 1314 transitions. Second operand 15 states. [2020-12-22 08:36:42,334 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-12-22 08:36:42,595 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-12-22 08:36:42,753 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-22 08:36:42,915 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-22 08:36:43,099 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 08:36:43,630 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 08:36:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:45,074 INFO L93 Difference]: Finished difference Result 4365 states and 6401 transitions. [2020-12-22 08:36:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 08:36:45,075 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-12-22 08:36:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:45,084 INFO L225 Difference]: With dead ends: 4365 [2020-12-22 08:36:45,085 INFO L226 Difference]: Without dead ends: 3962 [2020-12-22 08:36:45,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2020-12-22 08:36:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3962 states. [2020-12-22 08:36:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3962 to 920. [2020-12-22 08:36:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 920 states. [2020-12-22 08:36:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1320 transitions. [2020-12-22 08:36:45,339 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1320 transitions. Word has length 57 [2020-12-22 08:36:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:45,339 INFO L481 AbstractCegarLoop]: Abstraction has 920 states and 1320 transitions. [2020-12-22 08:36:45,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 08:36:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1320 transitions. [2020-12-22 08:36:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:36:45,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:45,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:36:45,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:36:45,341 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:45,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1784114015, now seen corresponding path program 1 times [2020-12-22 08:36:45,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:45,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035153444] [2020-12-22 08:36:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:45,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035153444] [2020-12-22 08:36:45,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:45,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-22 08:36:45,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687058827] [2020-12-22 08:36:45,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 08:36:45,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:45,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 08:36:45,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:36:45,918 INFO L87 Difference]: Start difference. First operand 920 states and 1320 transitions. Second operand 13 states. [2020-12-22 08:36:46,366 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-22 08:36:48,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:48,229 INFO L93 Difference]: Finished difference Result 3250 states and 4752 transitions. [2020-12-22 08:36:48,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 08:36:48,232 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-12-22 08:36:48,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:48,239 INFO L225 Difference]: With dead ends: 3250 [2020-12-22 08:36:48,239 INFO L226 Difference]: Without dead ends: 2841 [2020-12-22 08:36:48,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:36:48,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2020-12-22 08:36:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 909. [2020-12-22 08:36:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 909 states. [2020-12-22 08:36:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1305 transitions. [2020-12-22 08:36:48,546 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1305 transitions. Word has length 57 [2020-12-22 08:36:48,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:48,546 INFO L481 AbstractCegarLoop]: Abstraction has 909 states and 1305 transitions. [2020-12-22 08:36:48,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 08:36:48,546 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1305 transitions. [2020-12-22 08:36:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:36:48,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:48,547 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] [2020-12-22 08:36:48,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:36:48,547 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:48,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1628002528, now seen corresponding path program 1 times [2020-12-22 08:36:48,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:48,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669895803] [2020-12-22 08:36:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:48,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669895803] [2020-12-22 08:36:48,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:48,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 08:36:48,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282760811] [2020-12-22 08:36:48,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 08:36:48,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:48,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 08:36:48,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:36:48,984 INFO L87 Difference]: Start difference. First operand 909 states and 1305 transitions. Second operand 11 states. [2020-12-22 08:36:49,402 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-12-22 08:36:49,594 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 08:36:49,791 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 08:36:50,041 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 08:36:50,215 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-22 08:36:50,358 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-12-22 08:36:51,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:51,429 INFO L93 Difference]: Finished difference Result 3703 states and 5436 transitions. [2020-12-22 08:36:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 08:36:51,430 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-12-22 08:36:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:51,435 INFO L225 Difference]: With dead ends: 3703 [2020-12-22 08:36:51,435 INFO L226 Difference]: Without dead ends: 3290 [2020-12-22 08:36:51,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:36:51,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2020-12-22 08:36:51,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 893. [2020-12-22 08:36:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 893 states. [2020-12-22 08:36:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1286 transitions. [2020-12-22 08:36:51,711 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1286 transitions. Word has length 57 [2020-12-22 08:36:51,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:51,711 INFO L481 AbstractCegarLoop]: Abstraction has 893 states and 1286 transitions. [2020-12-22 08:36:51,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 08:36:51,711 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1286 transitions. [2020-12-22 08:36:51,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:36:51,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:51,712 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] [2020-12-22 08:36:51,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:36:51,713 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:51,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1010808515, now seen corresponding path program 1 times [2020-12-22 08:36:51,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:51,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346086428] [2020-12-22 08:36:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:52,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346086428] [2020-12-22 08:36:52,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:52,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-12-22 08:36:52,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8593917] [2020-12-22 08:36:52,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 08:36:52,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:52,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 08:36:52,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:36:52,686 INFO L87 Difference]: Start difference. First operand 893 states and 1286 transitions. Second operand 18 states. [2020-12-22 08:36:53,521 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-22 08:36:53,841 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 08:36:54,261 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-12-22 08:36:54,578 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-12-22 08:36:54,860 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-12-22 08:36:55,156 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-12-22 08:36:55,816 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 08:36:56,327 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 08:36:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:59,967 INFO L93 Difference]: Finished difference Result 8460 states and 12483 transitions. [2020-12-22 08:36:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 08:36:59,968 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-12-22 08:36:59,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:59,990 INFO L225 Difference]: With dead ends: 8460 [2020-12-22 08:36:59,990 INFO L226 Difference]: Without dead ends: 8057 [2020-12-22 08:36:59,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 08:37:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8057 states. [2020-12-22 08:37:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8057 to 882. [2020-12-22 08:37:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 882 states. [2020-12-22 08:37:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1272 transitions. [2020-12-22 08:37:00,388 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1272 transitions. Word has length 57 [2020-12-22 08:37:00,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:00,388 INFO L481 AbstractCegarLoop]: Abstraction has 882 states and 1272 transitions. [2020-12-22 08:37:00,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 08:37:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1272 transitions. [2020-12-22 08:37:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:37:00,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:00,389 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] [2020-12-22 08:37:00,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:37:00,389 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1089654438, now seen corresponding path program 1 times [2020-12-22 08:37:00,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:00,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231191083] [2020-12-22 08:37:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:37:01,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231191083] [2020-12-22 08:37:01,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:01,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 08:37:01,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267662487] [2020-12-22 08:37:01,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:37:01,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:01,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:37:01,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:37:01,165 INFO L87 Difference]: Start difference. First operand 882 states and 1272 transitions. Second operand 21 states. [2020-12-22 08:37:01,370 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-12-22 08:37:02,058 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 08:37:02,279 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-12-22 08:37:02,544 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 08:37:02,853 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 08:37:03,009 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 08:37:03,160 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 08:37:03,342 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 08:37:06,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:06,008 INFO L93 Difference]: Finished difference Result 3675 states and 5405 transitions. [2020-12-22 08:37:06,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 08:37:06,008 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-12-22 08:37:06,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:06,014 INFO L225 Difference]: With dead ends: 3675 [2020-12-22 08:37:06,014 INFO L226 Difference]: Without dead ends: 3272 [2020-12-22 08:37:06,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 08:37:06,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2020-12-22 08:37:06,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 868. [2020-12-22 08:37:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2020-12-22 08:37:06,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1256 transitions. [2020-12-22 08:37:06,452 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1256 transitions. Word has length 58 [2020-12-22 08:37:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:06,452 INFO L481 AbstractCegarLoop]: Abstraction has 868 states and 1256 transitions. [2020-12-22 08:37:06,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 08:37:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1256 transitions. [2020-12-22 08:37:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 08:37:06,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:06,454 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] [2020-12-22 08:37:06,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:37:06,454 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:06,455 INFO L82 PathProgramCache]: Analyzing trace with hash -773234718, now seen corresponding path program 1 times [2020-12-22 08:37:06,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:06,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810604462] [2020-12-22 08:37:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:37:06,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810604462] [2020-12-22 08:37:06,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:06,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:37:06,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682999516] [2020-12-22 08:37:06,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:37:06,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:06,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:37:06,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:06,498 INFO L87 Difference]: Start difference. First operand 868 states and 1256 transitions. Second operand 3 states. [2020-12-22 08:37:07,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:07,138 INFO L93 Difference]: Finished difference Result 2332 states and 3402 transitions. [2020-12-22 08:37:07,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:37:07,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 08:37:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:07,143 INFO L225 Difference]: With dead ends: 2332 [2020-12-22 08:37:07,144 INFO L226 Difference]: Without dead ends: 1538 [2020-12-22 08:37:07,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:07,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2020-12-22 08:37:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1536. [2020-12-22 08:37:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1536 states. [2020-12-22 08:37:07,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 2188 transitions. [2020-12-22 08:37:07,773 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 2188 transitions. Word has length 76 [2020-12-22 08:37:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:07,774 INFO L481 AbstractCegarLoop]: Abstraction has 1536 states and 2188 transitions. [2020-12-22 08:37:07,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:37:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 2188 transitions. [2020-12-22 08:37:07,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:37:07,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:07,775 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] [2020-12-22 08:37:07,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:37:07,775 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:07,776 INFO L82 PathProgramCache]: Analyzing trace with hash -2013626748, now seen corresponding path program 1 times [2020-12-22 08:37:07,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:07,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859817320] [2020-12-22 08:37:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:37:07,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859817320] [2020-12-22 08:37:07,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:07,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:37:07,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121183599] [2020-12-22 08:37:07,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:37:07,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:07,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:37:07,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:07,835 INFO L87 Difference]: Start difference. First operand 1536 states and 2188 transitions. Second operand 3 states. [2020-12-22 08:37:09,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:09,116 INFO L93 Difference]: Finished difference Result 3902 states and 5579 transitions. [2020-12-22 08:37:09,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:37:09,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 08:37:09,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:09,124 INFO L225 Difference]: With dead ends: 3902 [2020-12-22 08:37:09,124 INFO L226 Difference]: Without dead ends: 2440 [2020-12-22 08:37:09,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2020-12-22 08:37:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2286. [2020-12-22 08:37:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2286 states. [2020-12-22 08:37:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 3222 transitions. [2020-12-22 08:37:10,159 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 3222 transitions. Word has length 77 [2020-12-22 08:37:10,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:10,159 INFO L481 AbstractCegarLoop]: Abstraction has 2286 states and 3222 transitions. [2020-12-22 08:37:10,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:37:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 3222 transitions. [2020-12-22 08:37:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:37:10,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:10,165 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] [2020-12-22 08:37:10,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:37:10,165 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:10,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:10,166 INFO L82 PathProgramCache]: Analyzing trace with hash 31132410, now seen corresponding path program 1 times [2020-12-22 08:37:10,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:10,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008118249] [2020-12-22 08:37:10,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:37:10,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008118249] [2020-12-22 08:37:10,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:10,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:37:10,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172850645] [2020-12-22 08:37:10,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:37:10,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:10,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:37:10,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:10,226 INFO L87 Difference]: Start difference. First operand 2286 states and 3222 transitions. Second operand 3 states. [2020-12-22 08:37:11,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:11,793 INFO L93 Difference]: Finished difference Result 6470 states and 9088 transitions. [2020-12-22 08:37:11,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:37:11,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 08:37:11,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:11,798 INFO L225 Difference]: With dead ends: 6470 [2020-12-22 08:37:11,798 INFO L226 Difference]: Without dead ends: 4258 [2020-12-22 08:37:11,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2020-12-22 08:37:13,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 4016. [2020-12-22 08:37:13,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4016 states. [2020-12-22 08:37:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4016 states to 4016 states and 5584 transitions. [2020-12-22 08:37:13,371 INFO L78 Accepts]: Start accepts. Automaton has 4016 states and 5584 transitions. Word has length 78 [2020-12-22 08:37:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:13,371 INFO L481 AbstractCegarLoop]: Abstraction has 4016 states and 5584 transitions. [2020-12-22 08:37:13,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:37:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 4016 states and 5584 transitions. [2020-12-22 08:37:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:37:13,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:13,372 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] [2020-12-22 08:37:13,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 08:37:13,372 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:13,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:13,373 INFO L82 PathProgramCache]: Analyzing trace with hash 769651115, now seen corresponding path program 1 times [2020-12-22 08:37:13,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:13,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270045229] [2020-12-22 08:37:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:13,427 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 08:37:13,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270045229] [2020-12-22 08:37:13,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:13,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:37:13,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233372523] [2020-12-22 08:37:13,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:37:13,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:13,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:37:13,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:13,430 INFO L87 Difference]: Start difference. First operand 4016 states and 5584 transitions. Second operand 3 states. [2020-12-22 08:37:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:16,884 INFO L93 Difference]: Finished difference Result 11420 states and 15754 transitions. [2020-12-22 08:37:16,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:37:16,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 08:37:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:16,892 INFO L225 Difference]: With dead ends: 11420 [2020-12-22 08:37:16,892 INFO L226 Difference]: Without dead ends: 7478 [2020-12-22 08:37:16,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2020-12-22 08:37:19,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 6996. [2020-12-22 08:37:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6996 states. [2020-12-22 08:37:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 9528 transitions. [2020-12-22 08:37:19,560 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 9528 transitions. Word has length 79 [2020-12-22 08:37:19,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:19,561 INFO L481 AbstractCegarLoop]: Abstraction has 6996 states and 9528 transitions. [2020-12-22 08:37:19,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:37:19,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 9528 transitions. [2020-12-22 08:37:19,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 08:37:19,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:19,562 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] [2020-12-22 08:37:19,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 08:37:19,563 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:19,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:19,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1757386099, now seen corresponding path program 1 times [2020-12-22 08:37:19,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:19,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950255679] [2020-12-22 08:37:19,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:37:19,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950255679] [2020-12-22 08:37:19,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:19,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:37:19,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073071158] [2020-12-22 08:37:19,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:37:19,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:19,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:37:19,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:37:19,650 INFO L87 Difference]: Start difference. First operand 6996 states and 9528 transitions. Second operand 6 states. [2020-12-22 08:37:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:24,132 INFO L93 Difference]: Finished difference Result 10820 states and 14600 transitions. [2020-12-22 08:37:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 08:37:24,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 08:37:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:24,140 INFO L225 Difference]: With dead ends: 10820 [2020-12-22 08:37:24,141 INFO L226 Difference]: Without dead ends: 10818 [2020-12-22 08:37:24,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:37:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10818 states. [2020-12-22 08:37:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10818 to 7188. [2020-12-22 08:37:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7188 states. [2020-12-22 08:37:27,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 9640 transitions. [2020-12-22 08:37:27,102 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 9640 transitions. Word has length 80 [2020-12-22 08:37:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:27,102 INFO L481 AbstractCegarLoop]: Abstraction has 7188 states and 9640 transitions. [2020-12-22 08:37:27,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:37:27,102 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 9640 transitions. [2020-12-22 08:37:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 08:37:27,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:27,103 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] [2020-12-22 08:37:27,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 08:37:27,103 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:27,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1852306095, now seen corresponding path program 1 times [2020-12-22 08:37:27,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:27,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945784871] [2020-12-22 08:37:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:37:27,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945784871] [2020-12-22 08:37:27,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:27,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:37:27,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077046982] [2020-12-22 08:37:27,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:37:27,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:27,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:37:27,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:27,153 INFO L87 Difference]: Start difference. First operand 7188 states and 9640 transitions. Second operand 3 states. [2020-12-22 08:37:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:30,145 INFO L93 Difference]: Finished difference Result 14504 states and 19486 transitions. [2020-12-22 08:37:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:37:30,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 08:37:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:30,152 INFO L225 Difference]: With dead ends: 14504 [2020-12-22 08:37:30,152 INFO L226 Difference]: Without dead ends: 7390 [2020-12-22 08:37:30,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7390 states. [2020-12-22 08:37:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7390 to 7388. [2020-12-22 08:37:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7388 states. [2020-12-22 08:37:33,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7388 states to 7388 states and 9772 transitions. [2020-12-22 08:37:33,182 INFO L78 Accepts]: Start accepts. Automaton has 7388 states and 9772 transitions. Word has length 80 [2020-12-22 08:37:33,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:33,182 INFO L481 AbstractCegarLoop]: Abstraction has 7388 states and 9772 transitions. [2020-12-22 08:37:33,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:37:33,182 INFO L276 IsEmpty]: Start isEmpty. Operand 7388 states and 9772 transitions. [2020-12-22 08:37:33,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 08:37:33,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:33,184 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:37:33,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 08:37:33,184 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:33,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:33,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1815794868, now seen corresponding path program 1 times [2020-12-22 08:37:33,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:33,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550315959] [2020-12-22 08:37:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:37:33,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550315959] [2020-12-22 08:37:33,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380458464] [2020-12-22 08:37:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:37:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:33,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 08:37:33,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:37:34,398 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 08:37:34,528 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 08:37:34,809 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 08:37:35,237 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 08:37:35,884 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 08:37:36,750 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 08:37:37,607 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 08:37:38,796 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 08:37:39,106 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 08:37:39,190 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:37:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:37:40,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:37:40,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2020-12-22 08:37:40,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314162158] [2020-12-22 08:37:40,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:37:40,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:40,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:37:40,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:37:40,280 INFO L87 Difference]: Start difference. First operand 7388 states and 9772 transitions. Second operand 21 states. [2020-12-22 08:37:40,469 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-22 08:37:40,841 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-12-22 08:37:41,291 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-22 08:37:41,647 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-22 08:37:41,983 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-12-22 08:37:42,240 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 08:37:42,658 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-12-22 08:37:42,942 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-12-22 08:37:43,291 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-22 08:37:43,484 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-22 08:37:43,700 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 08:37:43,893 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 08:37:44,269 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-12-22 08:37:44,559 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 08:37:45,015 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-12-22 08:37:45,482 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-12-22 08:37:46,065 WARN L197 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2020-12-22 08:37:46,571 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-12-22 08:37:46,800 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 08:37:46,999 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-12-22 08:37:47,471 WARN L197 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-12-22 08:37:47,750 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 08:37:48,003 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-22 08:37:48,585 WARN L197 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2020-12-22 08:37:48,819 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-22 08:37:49,072 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 08:37:49,320 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-22 08:37:49,624 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-12-22 08:37:50,509 WARN L197 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2020-12-22 08:37:50,764 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 08:37:51,276 WARN L197 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-12-22 08:37:51,569 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-12-22 08:37:52,061 WARN L197 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-12-22 08:37:53,107 WARN L197 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 100 [2020-12-22 08:37:53,586 WARN L197 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-12-22 08:37:53,965 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-12-22 08:37:54,767 WARN L197 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 08:37:55,115 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-12-22 08:37:55,552 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-12-22 08:37:56,556 WARN L197 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2020-12-22 08:37:56,983 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-12-22 08:37:57,937 WARN L197 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-12-22 08:37:58,751 WARN L197 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2020-12-22 08:37:59,216 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-12-22 08:38:00,696 WARN L197 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2020-12-22 08:38:01,448 WARN L197 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2020-12-22 08:38:02,720 WARN L197 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-12-22 08:38:03,436 WARN L197 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2020-12-22 08:38:04,574 WARN L197 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 105 [2020-12-22 08:38:05,670 WARN L197 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 08:38:07,190 WARN L197 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-22 08:38:07,615 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-22 08:38:08,705 WARN L197 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2020-12-22 08:38:09,256 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-12-22 08:38:10,080 WARN L197 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 97 [2020-12-22 08:38:10,855 WARN L197 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-12-22 08:38:12,437 WARN L197 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 108 DAG size of output: 99 [2020-12-22 08:38:13,677 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-12-22 08:38:14,670 WARN L197 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2020-12-22 08:38:15,036 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-12-22 08:38:15,907 WARN L197 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-22 08:38:17,237 WARN L197 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-12-22 08:38:17,948 WARN L197 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-12-22 08:38:19,213 WARN L197 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2020-12-22 08:38:19,866 WARN L197 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-12-22 08:38:20,421 WARN L197 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-12-22 08:38:21,409 WARN L197 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2020-12-22 08:38:22,918 WARN L197 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-12-22 08:38:23,393 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-12-22 08:38:23,873 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-12-22 08:38:25,118 WARN L197 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2020-12-22 08:38:25,691 WARN L197 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-12-22 08:38:26,324 WARN L197 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-12-22 08:38:26,930 WARN L197 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-12-22 08:38:27,325 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-22 08:38:28,494 WARN L197 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-12-22 08:38:30,069 WARN L197 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 112 DAG size of output: 103 [2020-12-22 08:38:31,834 WARN L197 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 08:38:33,248 WARN L197 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 106 DAG size of output: 97 [2020-12-22 08:38:34,639 WARN L197 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 08:38:35,410 WARN L197 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-12-22 08:38:35,935 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-12-22 08:38:36,558 WARN L197 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-12-22 08:38:36,911 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 08:38:37,272 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-12-22 08:38:37,824 WARN L197 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-12-22 08:38:38,345 WARN L197 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-22 08:38:38,943 WARN L197 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-12-22 08:38:40,046 WARN L197 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2020-12-22 08:38:41,964 WARN L197 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-22 08:38:42,755 WARN L197 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2020-12-22 08:38:43,749 WARN L197 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2020-12-22 08:38:44,882 WARN L197 SmtUtils]: Spent 954.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-12-22 08:38:45,663 WARN L197 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-12-22 08:38:46,336 WARN L197 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-12-22 08:38:47,853 WARN L197 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2020-12-22 08:38:48,914 WARN L197 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-12-22 08:38:51,577 WARN L197 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2020-12-22 08:38:53,097 WARN L197 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2020-12-22 08:38:54,543 WARN L197 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-12-22 08:38:56,477 WARN L197 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 109 DAG size of output: 100 [2020-12-22 08:38:58,858 WARN L197 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-12-22 08:39:00,959 WARN L197 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-12-22 08:39:01,684 WARN L197 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-12-22 08:39:02,210 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-22 08:39:02,923 WARN L197 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-12-22 08:39:03,857 WARN L197 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-12-22 08:39:04,840 WARN L197 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-12-22 08:39:05,368 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 08:39:05,956 WARN L197 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-12-22 08:39:07,298 WARN L197 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-22 08:39:08,304 WARN L197 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-12-22 08:39:10,556 WARN L197 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 116 DAG size of output: 105 [2020-12-22 08:39:13,021 WARN L197 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 112 DAG size of output: 103 [2020-12-22 08:39:14,340 WARN L197 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2020-12-22 08:39:16,836 WARN L197 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-12-22 08:39:18,076 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-12-22 08:39:19,343 WARN L197 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-12-22 08:39:22,789 WARN L197 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2020-12-22 08:39:23,641 WARN L197 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-12-22 08:39:24,648 WARN L197 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-12-22 08:39:25,184 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 08:39:26,524 WARN L197 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-12-22 08:39:27,737 WARN L197 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2020-12-22 08:39:28,557 WARN L197 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-12-22 08:39:30,025 WARN L197 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2020-12-22 08:39:32,145 WARN L197 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 108 DAG size of output: 97 [2020-12-22 08:39:34,125 WARN L197 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2020-12-22 08:39:37,018 WARN L197 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 08:39:40,268 WARN L197 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 108 DAG size of output: 99 [2020-12-22 08:39:44,211 WARN L197 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2020-12-22 08:39:45,735 WARN L197 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-12-22 08:39:46,590 WARN L197 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-12-22 08:39:47,649 WARN L197 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-22 08:39:48,204 WARN L197 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 08:39:48,845 WARN L197 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-22 08:39:49,908 WARN L197 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-12-22 08:39:52,851 WARN L197 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 107 DAG size of output: 100 [2020-12-22 08:39:55,433 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2020-12-22 08:39:56,926 WARN L197 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-12-22 08:39:57,616 WARN L197 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-12-22 08:39:59,183 WARN L197 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2020-12-22 08:40:01,283 WARN L197 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-22 08:40:03,578 WARN L197 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-12-22 08:40:05,902 WARN L197 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-12-22 08:40:07,554 WARN L197 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2020-12-22 08:40:12,293 WARN L197 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-12-22 08:40:13,161 WARN L197 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-22 08:40:14,052 WARN L197 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-12-22 08:40:16,153 WARN L197 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 81 DAG size of output: 76