/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/product-lines/elevator_spec14_product27.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:55:59,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:55:59,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:55:59,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:55:59,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:55:59,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:55:59,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:55:59,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:55:59,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:55:59,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:55:59,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:55:59,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:55:59,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:55:59,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:55:59,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:55:59,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:55:59,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:55:59,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:55:59,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:55:59,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:55:59,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:55:59,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:55:59,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:55:59,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:55:59,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:55:59,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:55:59,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:55:59,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:55:59,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:55:59,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:55:59,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:55:59,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:55:59,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:55:59,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:55:59,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:55:59,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:55:59,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:55:59,254 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:55:59,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:55:59,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:55:59,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:55:59,256 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:55:59,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:55:59,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:55:59,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:55:59,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:55:59,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:55:59,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:55:59,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:55:59,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:55:59,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:55:59,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:55:59,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:55:59,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:55:59,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:55:59,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:55:59,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:55:59,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:55:59,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:55:59,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:55:59,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:55:59,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:55:59,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:55:59,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:55:59,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:55:59,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:55:59,758 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:55:59,759 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:55:59,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2020-12-22 05:55:59,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80cd22a05/6ba368b616304a918ced824cc1d47ab3/FLAG49f2fd620 [2020-12-22 05:56:00,730 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:56:00,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2020-12-22 05:56:00,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80cd22a05/6ba368b616304a918ced824cc1d47ab3/FLAG49f2fd620 [2020-12-22 05:56:00,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80cd22a05/6ba368b616304a918ced824cc1d47ab3 [2020-12-22 05:56:00,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:56:00,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:56:00,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:56:00,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:56:00,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:56:00,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:56:00" (1/1) ... [2020-12-22 05:56:00,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cbbfa5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:00, skipping insertion in model container [2020-12-22 05:56:00,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:56:00" (1/1) ... [2020-12-22 05:56:00,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:56:01,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:56:01,205 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/product-lines/elevator_spec14_product27.cil.c[1222,1235] [2020-12-22 05:56:01,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:56:01,765 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:56:01,784 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/product-lines/elevator_spec14_product27.cil.c[1222,1235] [2020-12-22 05:56:01,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:56:02,038 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:56:02,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:02 WrapperNode [2020-12-22 05:56:02,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:56:02,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:56:02,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:56:02,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:56:02,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:02" (1/1) ... [2020-12-22 05:56:02,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:02" (1/1) ... [2020-12-22 05:56:02,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:56:02,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:56:02,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:56:02,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:56:02,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:02" (1/1) ... [2020-12-22 05:56:02,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:02" (1/1) ... [2020-12-22 05:56:02,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:02" (1/1) ... [2020-12-22 05:56:02,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:02" (1/1) ... [2020-12-22 05:56:03,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:02" (1/1) ... [2020-12-22 05:56:03,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:02" (1/1) ... [2020-12-22 05:56:03,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:02" (1/1) ... [2020-12-22 05:56:03,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:56:03,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:56:03,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:56:03,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:56:03,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:02" (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 05:56:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:56:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:56:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:56:03,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:56:16,433 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:56:16,434 INFO L299 CfgBuilder]: Removed 1503 assume(true) statements. [2020-12-22 05:56:16,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:56:16 BoogieIcfgContainer [2020-12-22 05:56:16,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:56:16,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:56:16,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:56:16,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:56:16,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:56:00" (1/3) ... [2020-12-22 05:56:16,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b8e5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:56:16, skipping insertion in model container [2020-12-22 05:56:16,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:56:02" (2/3) ... [2020-12-22 05:56:16,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b8e5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:56:16, skipping insertion in model container [2020-12-22 05:56:16,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:56:16" (3/3) ... [2020-12-22 05:56:16,451 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2020-12-22 05:56:16,458 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:56:16,467 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 05:56:16,488 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 05:56:16,539 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:56:16,539 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:56:16,539 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:56:16,539 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:56:16,539 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:56:16,539 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:56:16,540 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:56:16,540 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:56:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 6177 states. [2020-12-22 05:56:16,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 05:56:16,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:16,750 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] [2020-12-22 05:56:16,752 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:16,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1918734212, now seen corresponding path program 1 times [2020-12-22 05:56:16,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:16,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615453370] [2020-12-22 05:56:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:17,232 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 05:56:17,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615453370] [2020-12-22 05:56:17,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:17,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:56:17,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365911295] [2020-12-22 05:56:17,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 05:56:17,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:17,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 05:56:17,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:56:17,267 INFO L87 Difference]: Start difference. First operand 6177 states. Second operand 3 states. [2020-12-22 05:56:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:17,746 INFO L93 Difference]: Finished difference Result 14846 states and 27914 transitions. [2020-12-22 05:56:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 05:56:17,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-12-22 05:56:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:17,861 INFO L225 Difference]: With dead ends: 14846 [2020-12-22 05:56:17,861 INFO L226 Difference]: Without dead ends: 8673 [2020-12-22 05:56:17,885 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 05:56:17,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2020-12-22 05:56:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 6173. [2020-12-22 05:56:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6173 states. [2020-12-22 05:56:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6173 states to 6173 states and 11594 transitions. [2020-12-22 05:56:18,220 INFO L78 Accepts]: Start accepts. Automaton has 6173 states and 11594 transitions. Word has length 44 [2020-12-22 05:56:18,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:18,221 INFO L481 AbstractCegarLoop]: Abstraction has 6173 states and 11594 transitions. [2020-12-22 05:56:18,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 05:56:18,221 INFO L276 IsEmpty]: Start isEmpty. Operand 6173 states and 11594 transitions. [2020-12-22 05:56:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 05:56:18,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:18,227 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 05:56:18,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:56:18,229 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:18,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:18,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1796359280, now seen corresponding path program 1 times [2020-12-22 05:56:18,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:18,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474156657] [2020-12-22 05:56:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:18,403 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 05:56:18,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474156657] [2020-12-22 05:56:18,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:18,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:56:18,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524151387] [2020-12-22 05:56:18,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:56:18,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:18,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:56:18,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:56:18,407 INFO L87 Difference]: Start difference. First operand 6173 states and 11594 transitions. Second operand 6 states. [2020-12-22 05:56:19,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:19,306 INFO L93 Difference]: Finished difference Result 17256 states and 32412 transitions. [2020-12-22 05:56:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:56:19,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-12-22 05:56:19,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:19,372 INFO L225 Difference]: With dead ends: 17256 [2020-12-22 05:56:19,372 INFO L226 Difference]: Without dead ends: 11125 [2020-12-22 05:56:19,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:56:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11125 states. [2020-12-22 05:56:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11125 to 6169. [2020-12-22 05:56:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6169 states. [2020-12-22 05:56:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 11583 transitions. [2020-12-22 05:56:19,683 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 11583 transitions. Word has length 49 [2020-12-22 05:56:19,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:19,683 INFO L481 AbstractCegarLoop]: Abstraction has 6169 states and 11583 transitions. [2020-12-22 05:56:19,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:56:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 11583 transitions. [2020-12-22 05:56:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 05:56:19,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:19,689 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 05:56:19,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 05:56:19,690 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:19,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:19,695 INFO L82 PathProgramCache]: Analyzing trace with hash 165615760, now seen corresponding path program 1 times [2020-12-22 05:56:19,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:19,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927617838] [2020-12-22 05:56:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:19,857 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 05:56:19,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927617838] [2020-12-22 05:56:19,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:19,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:56:19,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236308902] [2020-12-22 05:56:19,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:19,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:19,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:19,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:19,860 INFO L87 Difference]: Start difference. First operand 6169 states and 11583 transitions. Second operand 4 states. [2020-12-22 05:56:20,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:20,838 INFO L93 Difference]: Finished difference Result 19718 states and 37026 transitions. [2020-12-22 05:56:20,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:56:20,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-12-22 05:56:20,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:20,910 INFO L225 Difference]: With dead ends: 19718 [2020-12-22 05:56:20,910 INFO L226 Difference]: Without dead ends: 13591 [2020-12-22 05:56:20,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:56:20,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13591 states. [2020-12-22 05:56:21,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13591 to 6169. [2020-12-22 05:56:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6169 states. [2020-12-22 05:56:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 11579 transitions. [2020-12-22 05:56:21,246 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 11579 transitions. Word has length 50 [2020-12-22 05:56:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:21,254 INFO L481 AbstractCegarLoop]: Abstraction has 6169 states and 11579 transitions. [2020-12-22 05:56:21,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:56:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 11579 transitions. [2020-12-22 05:56:21,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 05:56:21,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:21,260 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 05:56:21,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 05:56:21,260 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:21,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:21,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1432457197, now seen corresponding path program 1 times [2020-12-22 05:56:21,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:21,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899815952] [2020-12-22 05:56:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:21,380 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 05:56:21,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899815952] [2020-12-22 05:56:21,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:21,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:56:21,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438196920] [2020-12-22 05:56:21,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:21,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:21,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:21,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:21,384 INFO L87 Difference]: Start difference. First operand 6169 states and 11579 transitions. Second operand 4 states. [2020-12-22 05:56:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:22,039 INFO L93 Difference]: Finished difference Result 14790 states and 27774 transitions. [2020-12-22 05:56:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:56:22,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-12-22 05:56:22,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:22,066 INFO L225 Difference]: With dead ends: 14790 [2020-12-22 05:56:22,066 INFO L226 Difference]: Without dead ends: 8663 [2020-12-22 05:56:22,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:56:22,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8663 states. [2020-12-22 05:56:22,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8663 to 6169. [2020-12-22 05:56:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6169 states. [2020-12-22 05:56:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 11570 transitions. [2020-12-22 05:56:22,505 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 11570 transitions. Word has length 51 [2020-12-22 05:56:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:22,505 INFO L481 AbstractCegarLoop]: Abstraction has 6169 states and 11570 transitions. [2020-12-22 05:56:22,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:56:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 11570 transitions. [2020-12-22 05:56:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 05:56:22,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:22,509 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 05:56:22,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 05:56:22,510 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:22,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:22,510 INFO L82 PathProgramCache]: Analyzing trace with hash 604358581, now seen corresponding path program 1 times [2020-12-22 05:56:22,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:22,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108830359] [2020-12-22 05:56:22,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:22,619 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 05:56:22,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108830359] [2020-12-22 05:56:22,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:22,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:56:22,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479996200] [2020-12-22 05:56:22,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:22,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:22,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:22,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:22,624 INFO L87 Difference]: Start difference. First operand 6169 states and 11570 transitions. Second operand 4 states. [2020-12-22 05:56:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:23,320 INFO L93 Difference]: Finished difference Result 14790 states and 27756 transitions. [2020-12-22 05:56:23,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:56:23,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-12-22 05:56:23,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:23,349 INFO L225 Difference]: With dead ends: 14790 [2020-12-22 05:56:23,350 INFO L226 Difference]: Without dead ends: 8663 [2020-12-22 05:56:23,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:56:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8663 states. [2020-12-22 05:56:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8663 to 6169. [2020-12-22 05:56:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6169 states. [2020-12-22 05:56:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 11561 transitions. [2020-12-22 05:56:23,643 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 11561 transitions. Word has length 52 [2020-12-22 05:56:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:23,644 INFO L481 AbstractCegarLoop]: Abstraction has 6169 states and 11561 transitions. [2020-12-22 05:56:23,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:56:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 11561 transitions. [2020-12-22 05:56:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 05:56:23,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:23,649 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 05:56:23,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 05:56:23,650 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:23,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:23,650 INFO L82 PathProgramCache]: Analyzing trace with hash 695641141, now seen corresponding path program 1 times [2020-12-22 05:56:23,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:23,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023611265] [2020-12-22 05:56:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:23,719 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 05:56:23,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023611265] [2020-12-22 05:56:23,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:23,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:56:23,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477685165] [2020-12-22 05:56:23,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:23,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:23,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:23,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:23,722 INFO L87 Difference]: Start difference. First operand 6169 states and 11561 transitions. Second operand 4 states. [2020-12-22 05:56:24,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:24,462 INFO L93 Difference]: Finished difference Result 17233 states and 32326 transitions. [2020-12-22 05:56:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:56:24,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-12-22 05:56:24,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:24,495 INFO L225 Difference]: With dead ends: 17233 [2020-12-22 05:56:24,495 INFO L226 Difference]: Without dead ends: 11085 [2020-12-22 05:56:24,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:56:24,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11085 states. [2020-12-22 05:56:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11085 to 6151. [2020-12-22 05:56:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6151 states. [2020-12-22 05:56:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6151 states to 6151 states and 11530 transitions. [2020-12-22 05:56:24,742 INFO L78 Accepts]: Start accepts. Automaton has 6151 states and 11530 transitions. Word has length 52 [2020-12-22 05:56:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:24,742 INFO L481 AbstractCegarLoop]: Abstraction has 6151 states and 11530 transitions. [2020-12-22 05:56:24,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:56:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 6151 states and 11530 transitions. [2020-12-22 05:56:24,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 05:56:24,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:24,745 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 05:56:24,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 05:56:24,746 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:24,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:24,747 INFO L82 PathProgramCache]: Analyzing trace with hash -641391848, now seen corresponding path program 1 times [2020-12-22 05:56:24,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:24,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431227132] [2020-12-22 05:56:24,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:24,805 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 05:56:24,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431227132] [2020-12-22 05:56:24,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:24,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:56:24,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877771500] [2020-12-22 05:56:24,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:24,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:24,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:24,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:24,808 INFO L87 Difference]: Start difference. First operand 6151 states and 11530 transitions. Second operand 4 states. [2020-12-22 05:56:25,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:25,340 INFO L93 Difference]: Finished difference Result 14754 states and 27673 transitions. [2020-12-22 05:56:25,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:56:25,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 05:56:25,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:25,367 INFO L225 Difference]: With dead ends: 14754 [2020-12-22 05:56:25,368 INFO L226 Difference]: Without dead ends: 8624 [2020-12-22 05:56:25,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:56:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8624 states. [2020-12-22 05:56:25,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8624 to 6151. [2020-12-22 05:56:25,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6151 states. [2020-12-22 05:56:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6151 states to 6151 states and 11524 transitions. [2020-12-22 05:56:25,625 INFO L78 Accepts]: Start accepts. Automaton has 6151 states and 11524 transitions. Word has length 53 [2020-12-22 05:56:25,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:25,626 INFO L481 AbstractCegarLoop]: Abstraction has 6151 states and 11524 transitions. [2020-12-22 05:56:25,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:56:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6151 states and 11524 transitions. [2020-12-22 05:56:25,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 05:56:25,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:25,629 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 05:56:25,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 05:56:25,629 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:25,630 INFO L82 PathProgramCache]: Analyzing trace with hash -567479590, now seen corresponding path program 1 times [2020-12-22 05:56:25,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:25,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933763729] [2020-12-22 05:56:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:25,707 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 05:56:25,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933763729] [2020-12-22 05:56:25,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:25,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:56:25,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362265721] [2020-12-22 05:56:25,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:25,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:25,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:25,712 INFO L87 Difference]: Start difference. First operand 6151 states and 11524 transitions. Second operand 4 states. [2020-12-22 05:56:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:26,243 INFO L93 Difference]: Finished difference Result 14754 states and 27661 transitions. [2020-12-22 05:56:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:56:26,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-12-22 05:56:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:26,271 INFO L225 Difference]: With dead ends: 14754 [2020-12-22 05:56:26,272 INFO L226 Difference]: Without dead ends: 8624 [2020-12-22 05:56:26,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:56:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8624 states. [2020-12-22 05:56:26,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8624 to 6151. [2020-12-22 05:56:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6151 states. [2020-12-22 05:56:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6151 states to 6151 states and 11518 transitions. [2020-12-22 05:56:26,531 INFO L78 Accepts]: Start accepts. Automaton has 6151 states and 11518 transitions. Word has length 54 [2020-12-22 05:56:26,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:26,534 INFO L481 AbstractCegarLoop]: Abstraction has 6151 states and 11518 transitions. [2020-12-22 05:56:26,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:56:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 6151 states and 11518 transitions. [2020-12-22 05:56:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 05:56:26,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:26,538 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 05:56:26,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 05:56:26,538 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:26,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:26,539 INFO L82 PathProgramCache]: Analyzing trace with hash 917264799, now seen corresponding path program 1 times [2020-12-22 05:56:26,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:26,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607459216] [2020-12-22 05:56:26,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:26,614 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 05:56:26,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607459216] [2020-12-22 05:56:26,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:26,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:56:26,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370108809] [2020-12-22 05:56:26,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 05:56:26,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:26,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 05:56:26,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:56:26,623 INFO L87 Difference]: Start difference. First operand 6151 states and 11518 transitions. Second operand 3 states. [2020-12-22 05:56:26,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:26,941 INFO L93 Difference]: Finished difference Result 14745 states and 27638 transitions. [2020-12-22 05:56:26,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 05:56:26,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 05:56:26,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:26,977 INFO L225 Difference]: With dead ends: 14745 [2020-12-22 05:56:26,977 INFO L226 Difference]: Without dead ends: 8615 [2020-12-22 05:56:26,988 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 05:56:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8615 states. [2020-12-22 05:56:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8615 to 6151. [2020-12-22 05:56:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6151 states. [2020-12-22 05:56:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6151 states to 6151 states and 11517 transitions. [2020-12-22 05:56:27,270 INFO L78 Accepts]: Start accepts. Automaton has 6151 states and 11517 transitions. Word has length 55 [2020-12-22 05:56:27,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:27,271 INFO L481 AbstractCegarLoop]: Abstraction has 6151 states and 11517 transitions. [2020-12-22 05:56:27,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 05:56:27,271 INFO L276 IsEmpty]: Start isEmpty. Operand 6151 states and 11517 transitions. [2020-12-22 05:56:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 05:56:27,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:27,274 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 05:56:27,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 05:56:27,275 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:27,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:27,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1761270301, now seen corresponding path program 1 times [2020-12-22 05:56:27,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:27,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384947910] [2020-12-22 05:56:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:27,434 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 05:56:27,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384947910] [2020-12-22 05:56:27,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:27,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 05:56:27,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100033468] [2020-12-22 05:56:27,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:56:27,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:27,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:56:27,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:56:27,441 INFO L87 Difference]: Start difference. First operand 6151 states and 11517 transitions. Second operand 7 states. [2020-12-22 05:56:28,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:28,399 INFO L93 Difference]: Finished difference Result 19689 states and 36903 transitions. [2020-12-22 05:56:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:56:28,399 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-12-22 05:56:28,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:28,417 INFO L225 Difference]: With dead ends: 19689 [2020-12-22 05:56:28,417 INFO L226 Difference]: Without dead ends: 13565 [2020-12-22 05:56:28,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:56:28,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13565 states. [2020-12-22 05:56:28,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13565 to 6153. [2020-12-22 05:56:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6153 states. [2020-12-22 05:56:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 11518 transitions. [2020-12-22 05:56:28,730 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 11518 transitions. Word has length 55 [2020-12-22 05:56:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:28,730 INFO L481 AbstractCegarLoop]: Abstraction has 6153 states and 11518 transitions. [2020-12-22 05:56:28,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:56:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 11518 transitions. [2020-12-22 05:56:28,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 05:56:28,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:28,733 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 05:56:28,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 05:56:28,734 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:28,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:28,734 INFO L82 PathProgramCache]: Analyzing trace with hash 698289871, now seen corresponding path program 1 times [2020-12-22 05:56:28,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:28,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672840490] [2020-12-22 05:56:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:28,804 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 05:56:28,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672840490] [2020-12-22 05:56:28,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:28,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:56:28,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100362118] [2020-12-22 05:56:28,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:56:28,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:28,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:56:28,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:56:28,807 INFO L87 Difference]: Start difference. First operand 6153 states and 11518 transitions. Second operand 6 states. [2020-12-22 05:56:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:36,922 INFO L93 Difference]: Finished difference Result 56300 states and 105504 transitions. [2020-12-22 05:56:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 05:56:36,929 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-12-22 05:56:36,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:37,026 INFO L225 Difference]: With dead ends: 56300 [2020-12-22 05:56:37,026 INFO L226 Difference]: Without dead ends: 50198 [2020-12-22 05:56:37,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 05:56:37,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50198 states. [2020-12-22 05:56:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50198 to 8628. [2020-12-22 05:56:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8628 states. [2020-12-22 05:56:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8628 states to 8628 states and 16150 transitions. [2020-12-22 05:56:38,018 INFO L78 Accepts]: Start accepts. Automaton has 8628 states and 16150 transitions. Word has length 56 [2020-12-22 05:56:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:38,019 INFO L481 AbstractCegarLoop]: Abstraction has 8628 states and 16150 transitions. [2020-12-22 05:56:38,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:56:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 8628 states and 16150 transitions. [2020-12-22 05:56:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 05:56:38,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:38,022 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 05:56:38,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 05:56:38,022 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:38,023 INFO L82 PathProgramCache]: Analyzing trace with hash -448186155, now seen corresponding path program 1 times [2020-12-22 05:56:38,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:38,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27746158] [2020-12-22 05:56:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:38,164 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 05:56:38,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27746158] [2020-12-22 05:56:38,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:38,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:56:38,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866438036] [2020-12-22 05:56:38,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:56:38,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:38,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:56:38,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:56:38,166 INFO L87 Difference]: Start difference. First operand 8628 states and 16150 transitions. Second operand 7 states. [2020-12-22 05:56:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:54,808 INFO L93 Difference]: Finished difference Result 68388 states and 128432 transitions. [2020-12-22 05:56:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 05:56:54,808 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-12-22 05:56:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:54,901 INFO L225 Difference]: With dead ends: 68388 [2020-12-22 05:56:54,901 INFO L226 Difference]: Without dead ends: 59798 [2020-12-22 05:56:54,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-12-22 05:56:55,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59798 states. [2020-12-22 05:56:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59798 to 10297. [2020-12-22 05:56:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10297 states. [2020-12-22 05:56:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10297 states to 10297 states and 18972 transitions. [2020-12-22 05:56:55,940 INFO L78 Accepts]: Start accepts. Automaton has 10297 states and 18972 transitions. Word has length 57 [2020-12-22 05:56:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:55,940 INFO L481 AbstractCegarLoop]: Abstraction has 10297 states and 18972 transitions. [2020-12-22 05:56:55,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:56:55,940 INFO L276 IsEmpty]: Start isEmpty. Operand 10297 states and 18972 transitions. [2020-12-22 05:56:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 05:56:55,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:55,943 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] [2020-12-22 05:56:55,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 05:56:55,943 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:55,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1181415387, now seen corresponding path program 1 times [2020-12-22 05:56:55,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:55,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604115970] [2020-12-22 05:56:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:56,045 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 05:56:56,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604115970] [2020-12-22 05:56:56,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:56,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:56:56,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263955727] [2020-12-22 05:56:56,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:56:56,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:56,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:56:56,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:56,048 INFO L87 Difference]: Start difference. First operand 10297 states and 18972 transitions. Second operand 4 states. [2020-12-22 05:56:59,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:56:59,129 INFO L93 Difference]: Finished difference Result 29009 states and 53846 transitions. [2020-12-22 05:56:59,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:56:59,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-12-22 05:56:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:56:59,156 INFO L225 Difference]: With dead ends: 29009 [2020-12-22 05:56:59,156 INFO L226 Difference]: Without dead ends: 18748 [2020-12-22 05:56:59,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:56:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18748 states. [2020-12-22 05:56:59,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18748 to 10297. [2020-12-22 05:56:59,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10297 states. [2020-12-22 05:56:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10297 states to 10297 states and 18935 transitions. [2020-12-22 05:56:59,615 INFO L78 Accepts]: Start accepts. Automaton has 10297 states and 18935 transitions. Word has length 59 [2020-12-22 05:56:59,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:56:59,616 INFO L481 AbstractCegarLoop]: Abstraction has 10297 states and 18935 transitions. [2020-12-22 05:56:59,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:56:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 10297 states and 18935 transitions. [2020-12-22 05:56:59,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 05:56:59,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:56:59,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:56:59,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 05:56:59,619 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:56:59,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:56:59,619 INFO L82 PathProgramCache]: Analyzing trace with hash -954878924, now seen corresponding path program 1 times [2020-12-22 05:56:59,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:56:59,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556363644] [2020-12-22 05:56:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:56:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:56:59,816 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 05:56:59,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556363644] [2020-12-22 05:56:59,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:56:59,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:56:59,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556718539] [2020-12-22 05:56:59,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:56:59,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:56:59,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:56:59,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:56:59,819 INFO L87 Difference]: Start difference. First operand 10297 states and 18935 transitions. Second operand 6 states. [2020-12-22 05:57:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:57:13,321 INFO L93 Difference]: Finished difference Result 121139 states and 223606 transitions. [2020-12-22 05:57:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 05:57:13,321 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-12-22 05:57:13,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:57:13,507 INFO L225 Difference]: With dead ends: 121139 [2020-12-22 05:57:13,507 INFO L226 Difference]: Without dead ends: 110896 [2020-12-22 05:57:13,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 05:57:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110896 states. [2020-12-22 05:57:15,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110896 to 20557. [2020-12-22 05:57:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20557 states. [2020-12-22 05:57:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20557 states to 20557 states and 37834 transitions. [2020-12-22 05:57:15,264 INFO L78 Accepts]: Start accepts. Automaton has 20557 states and 37834 transitions. Word has length 62 [2020-12-22 05:57:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:57:15,265 INFO L481 AbstractCegarLoop]: Abstraction has 20557 states and 37834 transitions. [2020-12-22 05:57:15,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:57:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 20557 states and 37834 transitions. [2020-12-22 05:57:15,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 05:57:15,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:57:15,268 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] [2020-12-22 05:57:15,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 05:57:15,269 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:57:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:57:15,269 INFO L82 PathProgramCache]: Analyzing trace with hash -438986150, now seen corresponding path program 1 times [2020-12-22 05:57:15,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:57:15,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592013201] [2020-12-22 05:57:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:57:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:57:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:57:15,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592013201] [2020-12-22 05:57:15,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:57:15,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:57:15,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678829852] [2020-12-22 05:57:15,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:57:15,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:57:15,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:57:15,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:57:15,346 INFO L87 Difference]: Start difference. First operand 20557 states and 37834 transitions. Second operand 6 states. [2020-12-22 05:57:33,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:57:33,306 INFO L93 Difference]: Finished difference Result 211906 states and 391255 transitions. [2020-12-22 05:57:33,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 05:57:33,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-12-22 05:57:33,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:57:33,880 INFO L225 Difference]: With dead ends: 211906 [2020-12-22 05:57:33,881 INFO L226 Difference]: Without dead ends: 191430 [2020-12-22 05:57:33,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 05:57:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191430 states. [2020-12-22 05:57:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191430 to 35409. [2020-12-22 05:57:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35409 states. [2020-12-22 05:57:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35409 states to 35409 states and 65207 transitions. [2020-12-22 05:57:36,993 INFO L78 Accepts]: Start accepts. Automaton has 35409 states and 65207 transitions. Word has length 63 [2020-12-22 05:57:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:57:36,993 INFO L481 AbstractCegarLoop]: Abstraction has 35409 states and 65207 transitions. [2020-12-22 05:57:36,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:57:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 35409 states and 65207 transitions. [2020-12-22 05:57:36,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 05:57:36,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:57:36,999 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] [2020-12-22 05:57:36,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 05:57:36,999 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:57:37,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:57:37,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1432025209, now seen corresponding path program 1 times [2020-12-22 05:57:37,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:57:37,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077047720] [2020-12-22 05:57:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:57:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:57:37,069 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 05:57:37,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077047720] [2020-12-22 05:57:37,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:57:37,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:57:37,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120287009] [2020-12-22 05:57:37,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:57:37,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:57:37,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:57:37,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:57:37,072 INFO L87 Difference]: Start difference. First operand 35409 states and 65207 transitions. Second operand 5 states. [2020-12-22 05:57:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:57:39,831 INFO L93 Difference]: Finished difference Result 68675 states and 126519 transitions. [2020-12-22 05:57:39,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:57:39,831 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 05:57:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:57:39,880 INFO L225 Difference]: With dead ends: 68675 [2020-12-22 05:57:39,880 INFO L226 Difference]: Without dead ends: 33290 [2020-12-22 05:57:39,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:57:39,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33290 states. [2020-12-22 05:57:41,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33290 to 19484. [2020-12-22 05:57:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19484 states. [2020-12-22 05:57:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19484 states to 19484 states and 35882 transitions. [2020-12-22 05:57:41,315 INFO L78 Accepts]: Start accepts. Automaton has 19484 states and 35882 transitions. Word has length 63 [2020-12-22 05:57:41,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:57:41,315 INFO L481 AbstractCegarLoop]: Abstraction has 19484 states and 35882 transitions. [2020-12-22 05:57:41,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:57:41,315 INFO L276 IsEmpty]: Start isEmpty. Operand 19484 states and 35882 transitions. [2020-12-22 05:57:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 05:57:41,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:57:41,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:57:41,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 05:57:41,317 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:57:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:57:41,318 INFO L82 PathProgramCache]: Analyzing trace with hash -692258028, now seen corresponding path program 1 times [2020-12-22 05:57:41,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:57:41,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079021621] [2020-12-22 05:57:41,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:57:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:57:41,386 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 05:57:41,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079021621] [2020-12-22 05:57:41,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:57:41,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:57:41,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369408881] [2020-12-22 05:57:41,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:57:41,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:57:41,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:57:41,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:57:41,388 INFO L87 Difference]: Start difference. First operand 19484 states and 35882 transitions. Second operand 5 states. [2020-12-22 05:57:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:57:49,631 INFO L93 Difference]: Finished difference Result 92280 states and 169451 transitions. [2020-12-22 05:57:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:57:49,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 05:57:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:57:49,730 INFO L225 Difference]: With dead ends: 92280 [2020-12-22 05:57:49,731 INFO L226 Difference]: Without dead ends: 72848 [2020-12-22 05:57:49,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:57:49,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72848 states. [2020-12-22 05:57:51,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72848 to 24138. [2020-12-22 05:57:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24138 states. [2020-12-22 05:57:51,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24138 states to 24138 states and 44418 transitions. [2020-12-22 05:57:51,514 INFO L78 Accepts]: Start accepts. Automaton has 24138 states and 44418 transitions. Word has length 64 [2020-12-22 05:57:51,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:57:51,514 INFO L481 AbstractCegarLoop]: Abstraction has 24138 states and 44418 transitions. [2020-12-22 05:57:51,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:57:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 24138 states and 44418 transitions. [2020-12-22 05:57:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 05:57:51,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:57:51,520 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] [2020-12-22 05:57:51,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 05:57:51,520 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:57:51,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:57:51,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1588709447, now seen corresponding path program 1 times [2020-12-22 05:57:51,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:57:51,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780324697] [2020-12-22 05:57:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:57:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:57:51,766 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 05:57:51,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780324697] [2020-12-22 05:57:51,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:57:51,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:57:51,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184069178] [2020-12-22 05:57:51,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:57:51,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:57:51,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:57:51,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:57:51,768 INFO L87 Difference]: Start difference. First operand 24138 states and 44418 transitions. Second operand 6 states. [2020-12-22 05:58:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:58:06,094 INFO L93 Difference]: Finished difference Result 158172 states and 292726 transitions. [2020-12-22 05:58:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 05:58:06,094 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-12-22 05:58:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:58:06,494 INFO L225 Difference]: With dead ends: 158172 [2020-12-22 05:58:06,494 INFO L226 Difference]: Without dead ends: 134087 [2020-12-22 05:58:06,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 05:58:06,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134087 states. [2020-12-22 05:58:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134087 to 28575. [2020-12-22 05:58:08,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28575 states. [2020-12-22 05:58:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28575 states to 28575 states and 52646 transitions. [2020-12-22 05:58:09,001 INFO L78 Accepts]: Start accepts. Automaton has 28575 states and 52646 transitions. Word has length 64 [2020-12-22 05:58:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:58:09,001 INFO L481 AbstractCegarLoop]: Abstraction has 28575 states and 52646 transitions. [2020-12-22 05:58:09,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:58:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand 28575 states and 52646 transitions. [2020-12-22 05:58:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 05:58:09,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:58:09,004 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] [2020-12-22 05:58:09,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 05:58:09,004 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:58:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:58:09,005 INFO L82 PathProgramCache]: Analyzing trace with hash 414942257, now seen corresponding path program 1 times [2020-12-22 05:58:09,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:58:09,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870071080] [2020-12-22 05:58:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:58:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:58:09,067 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 05:58:09,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870071080] [2020-12-22 05:58:09,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:58:09,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:58:09,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368328107] [2020-12-22 05:58:09,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:58:09,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:58:09,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:58:09,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:58:09,069 INFO L87 Difference]: Start difference. First operand 28575 states and 52646 transitions. Second operand 4 states. [2020-12-22 05:58:16,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:58:16,295 INFO L93 Difference]: Finished difference Result 75162 states and 139394 transitions. [2020-12-22 05:58:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:58:16,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 05:58:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:58:16,373 INFO L225 Difference]: With dead ends: 75162 [2020-12-22 05:58:16,374 INFO L226 Difference]: Without dead ends: 46621 [2020-12-22 05:58:16,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:58:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46621 states. [2020-12-22 05:58:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46621 to 28265. [2020-12-22 05:58:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28265 states. [2020-12-22 05:58:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28265 states to 28265 states and 51970 transitions. [2020-12-22 05:58:18,403 INFO L78 Accepts]: Start accepts. Automaton has 28265 states and 51970 transitions. Word has length 65 [2020-12-22 05:58:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:58:18,408 INFO L481 AbstractCegarLoop]: Abstraction has 28265 states and 51970 transitions. [2020-12-22 05:58:18,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:58:18,408 INFO L276 IsEmpty]: Start isEmpty. Operand 28265 states and 51970 transitions. [2020-12-22 05:58:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 05:58:18,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:58:18,410 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] [2020-12-22 05:58:18,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 05:58:18,410 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:58:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:58:18,411 INFO L82 PathProgramCache]: Analyzing trace with hash -393096599, now seen corresponding path program 1 times [2020-12-22 05:58:18,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:58:18,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511106181] [2020-12-22 05:58:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:58:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:58:18,475 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 05:58:18,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511106181] [2020-12-22 05:58:18,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:58:18,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:58:18,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590727963] [2020-12-22 05:58:18,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:58:18,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:58:18,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:58:18,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:58:18,477 INFO L87 Difference]: Start difference. First operand 28265 states and 51970 transitions. Second operand 5 states. [2020-12-22 05:58:31,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:58:31,163 INFO L93 Difference]: Finished difference Result 228164 states and 420011 transitions. [2020-12-22 05:58:31,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:58:31,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 05:58:31,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:58:31,666 INFO L225 Difference]: With dead ends: 228164 [2020-12-22 05:58:31,666 INFO L226 Difference]: Without dead ends: 199942 [2020-12-22 05:58:31,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:58:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199942 states. [2020-12-22 05:58:36,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199942 to 55241. [2020-12-22 05:58:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55241 states. [2020-12-22 05:58:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55241 states to 55241 states and 101529 transitions. [2020-12-22 05:58:36,619 INFO L78 Accepts]: Start accepts. Automaton has 55241 states and 101529 transitions. Word has length 67 [2020-12-22 05:58:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:58:36,619 INFO L481 AbstractCegarLoop]: Abstraction has 55241 states and 101529 transitions. [2020-12-22 05:58:36,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:58:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 55241 states and 101529 transitions. [2020-12-22 05:58:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 05:58:36,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:58:36,624 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] [2020-12-22 05:58:36,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 05:58:36,624 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:58:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:58:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash 308503275, now seen corresponding path program 1 times [2020-12-22 05:58:36,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:58:36,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078107183] [2020-12-22 05:58:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:58:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:58:36,698 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 05:58:36,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078107183] [2020-12-22 05:58:36,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:58:36,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:58:36,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993104875] [2020-12-22 05:58:36,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:58:36,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:58:36,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:58:36,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:58:36,700 INFO L87 Difference]: Start difference. First operand 55241 states and 101529 transitions. Second operand 6 states. [2020-12-22 05:58:56,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:58:56,129 INFO L93 Difference]: Finished difference Result 276600 states and 512557 transitions. [2020-12-22 05:58:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 05:58:56,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 05:58:56,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:58:56,618 INFO L225 Difference]: With dead ends: 276600 [2020-12-22 05:58:56,618 INFO L226 Difference]: Without dead ends: 246294 [2020-12-22 05:58:56,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 05:58:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246294 states. [2020-12-22 05:59:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246294 to 55529. [2020-12-22 05:59:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55529 states. [2020-12-22 05:59:02,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55529 states to 55529 states and 101817 transitions. [2020-12-22 05:59:02,058 INFO L78 Accepts]: Start accepts. Automaton has 55529 states and 101817 transitions. Word has length 67 [2020-12-22 05:59:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:59:02,059 INFO L481 AbstractCegarLoop]: Abstraction has 55529 states and 101817 transitions. [2020-12-22 05:59:02,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:59:02,059 INFO L276 IsEmpty]: Start isEmpty. Operand 55529 states and 101817 transitions. [2020-12-22 05:59:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 05:59:02,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:59:02,060 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] [2020-12-22 05:59:02,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 05:59:02,061 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:59:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:59:02,061 INFO L82 PathProgramCache]: Analyzing trace with hash 297445235, now seen corresponding path program 1 times [2020-12-22 05:59:02,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:59:02,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590693166] [2020-12-22 05:59:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:59:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:59:02,200 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 05:59:02,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590693166] [2020-12-22 05:59:02,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:59:02,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:59:02,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450308667] [2020-12-22 05:59:02,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:59:02,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:59:02,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:59:02,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:59:02,202 INFO L87 Difference]: Start difference. First operand 55529 states and 101817 transitions. Second operand 6 states. [2020-12-22 05:59:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:59:22,009 INFO L93 Difference]: Finished difference Result 277289 states and 513230 transitions. [2020-12-22 05:59:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 05:59:22,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-12-22 05:59:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:59:22,642 INFO L225 Difference]: With dead ends: 277289 [2020-12-22 05:59:22,642 INFO L226 Difference]: Without dead ends: 246774 [2020-12-22 05:59:22,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 05:59:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246774 states. [2020-12-22 05:59:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246774 to 55529. [2020-12-22 05:59:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55529 states. [2020-12-22 05:59:28,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55529 states to 55529 states and 101817 transitions. [2020-12-22 05:59:28,222 INFO L78 Accepts]: Start accepts. Automaton has 55529 states and 101817 transitions. Word has length 68 [2020-12-22 05:59:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:59:28,223 INFO L481 AbstractCegarLoop]: Abstraction has 55529 states and 101817 transitions. [2020-12-22 05:59:28,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:59:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 55529 states and 101817 transitions. [2020-12-22 05:59:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 05:59:28,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:59:28,224 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] [2020-12-22 05:59:28,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 05:59:28,225 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:59:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:59:28,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1576978331, now seen corresponding path program 1 times [2020-12-22 05:59:28,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:59:28,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028963916] [2020-12-22 05:59:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:59:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:59:28,300 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 05:59:28,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028963916] [2020-12-22 05:59:28,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:59:28,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:59:28,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250334516] [2020-12-22 05:59:28,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:59:28,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:59:28,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:59:28,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:59:28,302 INFO L87 Difference]: Start difference. First operand 55529 states and 101817 transitions. Second operand 5 states. [2020-12-22 05:59:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:59:43,077 INFO L93 Difference]: Finished difference Result 249493 states and 460105 transitions. [2020-12-22 05:59:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:59:43,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 05:59:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:59:43,482 INFO L225 Difference]: With dead ends: 249493 [2020-12-22 05:59:43,482 INFO L226 Difference]: Without dead ends: 218972 [2020-12-22 05:59:43,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:59:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218972 states.