/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/email_spec11_product08.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:19:25,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:19:25,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:19:25,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:19:25,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:19:25,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:19:25,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:19:25,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:19:25,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:19:25,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:19:25,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:19:25,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:19:25,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:19:25,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:19:25,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:19:25,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:19:25,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:19:25,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:19:25,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:19:25,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:19:25,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:19:25,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:19:25,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:19:25,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:19:25,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:19:25,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:19:25,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:19:25,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:19:25,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:19:25,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:19:25,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:19:25,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:19:25,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:19:25,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:19:25,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:19:25,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:19:25,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:19:25,782 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:19:25,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:19:25,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:19:25,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:19:25,787 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:19:25,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:19:25,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:19:25,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:19:25,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:19:25,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:19:25,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:19:25,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:19:25,789 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:19:25,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:19:25,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:19:25,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:19:25,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:19:25,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:19:25,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:19:25,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:19:25,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:19:25,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:19:25,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:19:25,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:19:25,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:19:25,792 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:19:26,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:19:26,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:19:26,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:19:26,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:19:26,205 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:19:26,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec11_product08.cil.c [2020-12-22 06:19:26,284 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ec4c96a/ecec5c6959b249faa2e056843659499b/FLAGfe4e2c3e8 [2020-12-22 06:19:27,118 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:19:27,119 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec11_product08.cil.c [2020-12-22 06:19:27,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ec4c96a/ecec5c6959b249faa2e056843659499b/FLAGfe4e2c3e8 [2020-12-22 06:19:27,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ec4c96a/ecec5c6959b249faa2e056843659499b [2020-12-22 06:19:27,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:19:27,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:19:27,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:19:27,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:19:27,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:19:27,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:19:27" (1/1) ... [2020-12-22 06:19:27,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce3440b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:27, skipping insertion in model container [2020-12-22 06:19:27,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:19:27" (1/1) ... [2020-12-22 06:19:27,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:19:27,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:19:27,901 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/email_spec11_product08.cil.c[54507,54520] [2020-12-22 06:19:27,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:19:27,925 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:19:28,123 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/email_spec11_product08.cil.c[54507,54520] [2020-12-22 06:19:28,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:19:28,203 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:19:28,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:28 WrapperNode [2020-12-22 06:19:28,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:19:28,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:19:28,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:19:28,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:19:28,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:28" (1/1) ... [2020-12-22 06:19:28,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:28" (1/1) ... [2020-12-22 06:19:28,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:19:28,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:19:28,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:19:28,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:19:28,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:28" (1/1) ... [2020-12-22 06:19:28,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:28" (1/1) ... [2020-12-22 06:19:28,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:28" (1/1) ... [2020-12-22 06:19:28,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:28" (1/1) ... [2020-12-22 06:19:28,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:28" (1/1) ... [2020-12-22 06:19:28,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:28" (1/1) ... [2020-12-22 06:19:28,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:28" (1/1) ... [2020-12-22 06:19:28,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:19:28,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:19:28,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:19:28,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:19:28,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:28" (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 06:19:28,551 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-12-22 06:19:28,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:19:28,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:19:28,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:19:28,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:19:30,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:19:30,138 INFO L299 CfgBuilder]: Removed 203 assume(true) statements. [2020-12-22 06:19:30,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:19:30 BoogieIcfgContainer [2020-12-22 06:19:30,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:19:30,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:19:30,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:19:30,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:19:30,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:19:27" (1/3) ... [2020-12-22 06:19:30,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64dc9fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:19:30, skipping insertion in model container [2020-12-22 06:19:30,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:28" (2/3) ... [2020-12-22 06:19:30,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64dc9fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:19:30, skipping insertion in model container [2020-12-22 06:19:30,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:19:30" (3/3) ... [2020-12-22 06:19:30,149 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product08.cil.c [2020-12-22 06:19:30,156 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:19:30,161 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 06:19:30,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 06:19:30,209 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:19:30,209 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:19:30,209 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:19:30,209 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:19:30,210 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:19:30,210 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:19:30,210 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:19:30,210 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:19:30,232 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states. [2020-12-22 06:19:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 06:19:30,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:30,245 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] [2020-12-22 06:19:30,246 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:30,255 INFO L82 PathProgramCache]: Analyzing trace with hash 741947903, now seen corresponding path program 1 times [2020-12-22 06:19:30,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:30,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561883026] [2020-12-22 06:19:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:30,682 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 06:19:30,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561883026] [2020-12-22 06:19:30,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:30,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:30,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120839704] [2020-12-22 06:19:30,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:30,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:30,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:30,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:30,707 INFO L87 Difference]: Start difference. First operand 313 states. Second operand 3 states. [2020-12-22 06:19:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:30,839 INFO L93 Difference]: Finished difference Result 904 states and 1586 transitions. [2020-12-22 06:19:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:30,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-22 06:19:30,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:30,878 INFO L225 Difference]: With dead ends: 904 [2020-12-22 06:19:30,878 INFO L226 Difference]: Without dead ends: 584 [2020-12-22 06:19:30,887 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 06:19:30,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-12-22 06:19:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 301. [2020-12-22 06:19:30,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-22 06:19:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 522 transitions. [2020-12-22 06:19:30,999 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 522 transitions. Word has length 38 [2020-12-22 06:19:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:30,999 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 522 transitions. [2020-12-22 06:19:31,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 522 transitions. [2020-12-22 06:19:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 06:19:31,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:31,010 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] [2020-12-22 06:19:31,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:19:31,011 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:31,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:31,013 INFO L82 PathProgramCache]: Analyzing trace with hash -919835246, now seen corresponding path program 1 times [2020-12-22 06:19:31,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:31,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487039042] [2020-12-22 06:19:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:31,198 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 06:19:31,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487039042] [2020-12-22 06:19:31,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:31,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:19:31,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473034251] [2020-12-22 06:19:31,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:19:31,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:31,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:19:31,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:19:31,203 INFO L87 Difference]: Start difference. First operand 301 states and 522 transitions. Second operand 5 states. [2020-12-22 06:19:31,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:31,398 INFO L93 Difference]: Finished difference Result 852 states and 1482 transitions. [2020-12-22 06:19:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:19:31,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 06:19:31,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:31,405 INFO L225 Difference]: With dead ends: 852 [2020-12-22 06:19:31,405 INFO L226 Difference]: Without dead ends: 570 [2020-12-22 06:19:31,407 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 06:19:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-12-22 06:19:31,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 301. [2020-12-22 06:19:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-22 06:19:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 521 transitions. [2020-12-22 06:19:31,452 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 521 transitions. Word has length 40 [2020-12-22 06:19:31,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:31,452 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 521 transitions. [2020-12-22 06:19:31,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:19:31,452 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 521 transitions. [2020-12-22 06:19:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 06:19:31,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:31,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:19:31,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:19:31,455 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:31,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:31,456 INFO L82 PathProgramCache]: Analyzing trace with hash 464336863, now seen corresponding path program 1 times [2020-12-22 06:19:31,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:31,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73222854] [2020-12-22 06:19:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:31,532 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 06:19:31,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73222854] [2020-12-22 06:19:31,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:31,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:31,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124763024] [2020-12-22 06:19:31,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:31,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:31,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:31,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:31,536 INFO L87 Difference]: Start difference. First operand 301 states and 521 transitions. Second operand 3 states. [2020-12-22 06:19:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:31,570 INFO L93 Difference]: Finished difference Result 584 states and 1016 transitions. [2020-12-22 06:19:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:31,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 06:19:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:31,575 INFO L225 Difference]: With dead ends: 584 [2020-12-22 06:19:31,575 INFO L226 Difference]: Without dead ends: 306 [2020-12-22 06:19:31,577 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 06:19:31,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-12-22 06:19:31,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2020-12-22 06:19:31,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-22 06:19:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 520 transitions. [2020-12-22 06:19:31,596 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 520 transitions. Word has length 41 [2020-12-22 06:19:31,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:31,603 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 520 transitions. [2020-12-22 06:19:31,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 520 transitions. [2020-12-22 06:19:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 06:19:31,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:31,606 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] [2020-12-22 06:19:31,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:19:31,607 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:31,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1198863013, now seen corresponding path program 1 times [2020-12-22 06:19:31,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:31,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478187089] [2020-12-22 06:19:31,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:31,708 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 06:19:31,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478187089] [2020-12-22 06:19:31,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:31,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:31,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991301415] [2020-12-22 06:19:31,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:31,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:31,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:31,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:31,714 INFO L87 Difference]: Start difference. First operand 301 states and 520 transitions. Second operand 3 states. [2020-12-22 06:19:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:31,745 INFO L93 Difference]: Finished difference Result 594 states and 1029 transitions. [2020-12-22 06:19:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:31,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-12-22 06:19:31,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:31,750 INFO L225 Difference]: With dead ends: 594 [2020-12-22 06:19:31,750 INFO L226 Difference]: Without dead ends: 301 [2020-12-22 06:19:31,751 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 06:19:31,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-12-22 06:19:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2020-12-22 06:19:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-22 06:19:31,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 518 transitions. [2020-12-22 06:19:31,765 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 518 transitions. Word has length 42 [2020-12-22 06:19:31,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:31,765 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 518 transitions. [2020-12-22 06:19:31,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:31,766 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 518 transitions. [2020-12-22 06:19:31,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 06:19:31,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:31,767 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] [2020-12-22 06:19:31,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:19:31,767 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:31,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1645531078, now seen corresponding path program 1 times [2020-12-22 06:19:31,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:31,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127312758] [2020-12-22 06:19:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:31,866 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 06:19:31,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127312758] [2020-12-22 06:19:31,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:31,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:19:31,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645180635] [2020-12-22 06:19:31,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:19:31,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:31,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:19:31,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:19:31,869 INFO L87 Difference]: Start difference. First operand 301 states and 518 transitions. Second operand 5 states. [2020-12-22 06:19:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:32,004 INFO L93 Difference]: Finished difference Result 842 states and 1462 transitions. [2020-12-22 06:19:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:19:32,006 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 06:19:32,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:32,010 INFO L225 Difference]: With dead ends: 842 [2020-12-22 06:19:32,010 INFO L226 Difference]: Without dead ends: 568 [2020-12-22 06:19:32,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:19:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-12-22 06:19:32,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 301. [2020-12-22 06:19:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-22 06:19:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 517 transitions. [2020-12-22 06:19:32,030 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 517 transitions. Word has length 43 [2020-12-22 06:19:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:32,032 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 517 transitions. [2020-12-22 06:19:32,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:19:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 517 transitions. [2020-12-22 06:19:32,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 06:19:32,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:32,034 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 06:19:32,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:19:32,034 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:32,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:32,035 INFO L82 PathProgramCache]: Analyzing trace with hash 799277533, now seen corresponding path program 1 times [2020-12-22 06:19:32,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:32,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238776072] [2020-12-22 06:19:32,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:32,135 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 06:19:32,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238776072] [2020-12-22 06:19:32,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:32,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:19:32,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221245280] [2020-12-22 06:19:32,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:19:32,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:19:32,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:19:32,142 INFO L87 Difference]: Start difference. First operand 301 states and 517 transitions. Second operand 5 states. [2020-12-22 06:19:32,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:32,330 INFO L93 Difference]: Finished difference Result 847 states and 1467 transitions. [2020-12-22 06:19:32,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:19:32,331 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-22 06:19:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:32,335 INFO L225 Difference]: With dead ends: 847 [2020-12-22 06:19:32,335 INFO L226 Difference]: Without dead ends: 573 [2020-12-22 06:19:32,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:19:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-12-22 06:19:32,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 301. [2020-12-22 06:19:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-22 06:19:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 516 transitions. [2020-12-22 06:19:32,358 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 516 transitions. Word has length 44 [2020-12-22 06:19:32,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:32,359 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 516 transitions. [2020-12-22 06:19:32,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:19:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 516 transitions. [2020-12-22 06:19:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 06:19:32,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:32,362 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] [2020-12-22 06:19:32,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:19:32,363 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:32,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:32,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1056100619, now seen corresponding path program 1 times [2020-12-22 06:19:32,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:32,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669679074] [2020-12-22 06:19:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:32,459 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 06:19:32,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669679074] [2020-12-22 06:19:32,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:32,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:32,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23789504] [2020-12-22 06:19:32,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:32,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:32,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:32,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:32,464 INFO L87 Difference]: Start difference. First operand 301 states and 516 transitions. Second operand 3 states. [2020-12-22 06:19:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:32,495 INFO L93 Difference]: Finished difference Result 364 states and 608 transitions. [2020-12-22 06:19:32,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:32,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-22 06:19:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:32,498 INFO L225 Difference]: With dead ends: 364 [2020-12-22 06:19:32,499 INFO L226 Difference]: Without dead ends: 304 [2020-12-22 06:19:32,500 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 06:19:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-22 06:19:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 303. [2020-12-22 06:19:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-12-22 06:19:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 518 transitions. [2020-12-22 06:19:32,521 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 518 transitions. Word has length 45 [2020-12-22 06:19:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:32,522 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 518 transitions. [2020-12-22 06:19:32,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:32,522 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 518 transitions. [2020-12-22 06:19:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:19:32,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:32,523 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:19:32,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:19:32,523 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:32,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:32,524 INFO L82 PathProgramCache]: Analyzing trace with hash -142003357, now seen corresponding path program 1 times [2020-12-22 06:19:32,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:32,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971944683] [2020-12-22 06:19:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:19:32,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971944683] [2020-12-22 06:19:32,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:32,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:32,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074535413] [2020-12-22 06:19:32,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:32,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:32,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:32,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:32,617 INFO L87 Difference]: Start difference. First operand 303 states and 518 transitions. Second operand 3 states. [2020-12-22 06:19:32,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:32,672 INFO L93 Difference]: Finished difference Result 795 states and 1378 transitions. [2020-12-22 06:19:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:32,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 06:19:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:32,677 INFO L225 Difference]: With dead ends: 795 [2020-12-22 06:19:32,677 INFO L226 Difference]: Without dead ends: 523 [2020-12-22 06:19:32,679 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 06:19:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-12-22 06:19:32,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 463. [2020-12-22 06:19:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-12-22 06:19:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 811 transitions. [2020-12-22 06:19:32,718 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 811 transitions. Word has length 53 [2020-12-22 06:19:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:32,720 INFO L481 AbstractCegarLoop]: Abstraction has 463 states and 811 transitions. [2020-12-22 06:19:32,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 811 transitions. [2020-12-22 06:19:32,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:19:32,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:32,722 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:19:32,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:19:32,724 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:32,725 INFO L82 PathProgramCache]: Analyzing trace with hash 809880066, now seen corresponding path program 1 times [2020-12-22 06:19:32,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:32,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569767635] [2020-12-22 06:19:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:19:32,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569767635] [2020-12-22 06:19:32,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:32,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:19:32,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090033960] [2020-12-22 06:19:32,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:19:32,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:32,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:19:32,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:19:32,836 INFO L87 Difference]: Start difference. First operand 463 states and 811 transitions. Second operand 5 states. [2020-12-22 06:19:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:33,022 INFO L93 Difference]: Finished difference Result 1319 states and 2339 transitions. [2020-12-22 06:19:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:19:33,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 06:19:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:33,028 INFO L225 Difference]: With dead ends: 1319 [2020-12-22 06:19:33,028 INFO L226 Difference]: Without dead ends: 887 [2020-12-22 06:19:33,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:19:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2020-12-22 06:19:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 463. [2020-12-22 06:19:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-12-22 06:19:33,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 809 transitions. [2020-12-22 06:19:33,067 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 809 transitions. Word has length 54 [2020-12-22 06:19:33,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:33,068 INFO L481 AbstractCegarLoop]: Abstraction has 463 states and 809 transitions. [2020-12-22 06:19:33,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:19:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 809 transitions. [2020-12-22 06:19:33,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:19:33,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:33,069 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:19:33,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:19:33,070 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:33,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1598155623, now seen corresponding path program 1 times [2020-12-22 06:19:33,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:33,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464725987] [2020-12-22 06:19:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:19:33,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464725987] [2020-12-22 06:19:33,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:33,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:33,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030495701] [2020-12-22 06:19:33,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:33,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:33,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:33,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:33,123 INFO L87 Difference]: Start difference. First operand 463 states and 809 transitions. Second operand 3 states. [2020-12-22 06:19:33,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:33,181 INFO L93 Difference]: Finished difference Result 1317 states and 2331 transitions. [2020-12-22 06:19:33,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:33,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 06:19:33,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:33,187 INFO L225 Difference]: With dead ends: 1317 [2020-12-22 06:19:33,188 INFO L226 Difference]: Without dead ends: 885 [2020-12-22 06:19:33,189 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 06:19:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2020-12-22 06:19:33,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 825. [2020-12-22 06:19:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 825 states. [2020-12-22 06:19:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1472 transitions. [2020-12-22 06:19:33,248 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1472 transitions. Word has length 55 [2020-12-22 06:19:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:33,249 INFO L481 AbstractCegarLoop]: Abstraction has 825 states and 1472 transitions. [2020-12-22 06:19:33,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:33,249 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1472 transitions. [2020-12-22 06:19:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:19:33,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:33,251 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:19:33,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:19:33,251 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:33,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:33,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1910097993, now seen corresponding path program 1 times [2020-12-22 06:19:33,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:33,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118132368] [2020-12-22 06:19:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:19:33,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118132368] [2020-12-22 06:19:33,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794665124] [2020-12-22 06:19:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:19:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:33,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 06:19:33,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:19:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:19:33,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:19:33,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 06:19:33,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654332956] [2020-12-22 06:19:33,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:19:33,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:33,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:19:33,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:19:33,752 INFO L87 Difference]: Start difference. First operand 825 states and 1472 transitions. Second operand 5 states. [2020-12-22 06:19:33,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:33,837 INFO L93 Difference]: Finished difference Result 1164 states and 2044 transitions. [2020-12-22 06:19:33,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:19:33,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 06:19:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:33,844 INFO L225 Difference]: With dead ends: 1164 [2020-12-22 06:19:33,844 INFO L226 Difference]: Without dead ends: 1104 [2020-12-22 06:19:33,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:19:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2020-12-22 06:19:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1041. [2020-12-22 06:19:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1041 states. [2020-12-22 06:19:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1862 transitions. [2020-12-22 06:19:33,945 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1862 transitions. Word has length 55 [2020-12-22 06:19:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:33,945 INFO L481 AbstractCegarLoop]: Abstraction has 1041 states and 1862 transitions. [2020-12-22 06:19:33,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:19:33,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1862 transitions. [2020-12-22 06:19:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:19:33,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:33,947 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 06:19:34,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 06:19:34,161 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:34,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1213438348, now seen corresponding path program 1 times [2020-12-22 06:19:34,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:34,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972360003] [2020-12-22 06:19:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:19:34,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972360003] [2020-12-22 06:19:34,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:34,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:34,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661145278] [2020-12-22 06:19:34,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:34,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:34,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:34,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:34,228 INFO L87 Difference]: Start difference. First operand 1041 states and 1862 transitions. Second operand 3 states. [2020-12-22 06:19:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:34,346 INFO L93 Difference]: Finished difference Result 2757 states and 4960 transitions. [2020-12-22 06:19:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:34,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 06:19:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:34,357 INFO L225 Difference]: With dead ends: 2757 [2020-12-22 06:19:34,358 INFO L226 Difference]: Without dead ends: 1817 [2020-12-22 06:19:34,359 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 06:19:34,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2020-12-22 06:19:34,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1757. [2020-12-22 06:19:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1757 states. [2020-12-22 06:19:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 3167 transitions. [2020-12-22 06:19:34,488 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 3167 transitions. Word has length 59 [2020-12-22 06:19:34,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:34,489 INFO L481 AbstractCegarLoop]: Abstraction has 1757 states and 3167 transitions. [2020-12-22 06:19:34,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:34,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 3167 transitions. [2020-12-22 06:19:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:19:34,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:34,493 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] [2020-12-22 06:19:34,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:19:34,493 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash 354870260, now seen corresponding path program 1 times [2020-12-22 06:19:34,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:34,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097536693] [2020-12-22 06:19:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:34,592 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 06:19:34,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097536693] [2020-12-22 06:19:34,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:34,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:34,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533241289] [2020-12-22 06:19:34,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:34,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:34,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:34,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:34,599 INFO L87 Difference]: Start difference. First operand 1757 states and 3167 transitions. Second operand 3 states. [2020-12-22 06:19:34,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:34,776 INFO L93 Difference]: Finished difference Result 4641 states and 8394 transitions. [2020-12-22 06:19:34,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:34,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 06:19:34,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:34,795 INFO L225 Difference]: With dead ends: 4641 [2020-12-22 06:19:34,795 INFO L226 Difference]: Without dead ends: 3019 [2020-12-22 06:19:34,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2020-12-22 06:19:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 2959. [2020-12-22 06:19:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2959 states. [2020-12-22 06:19:35,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 5352 transitions. [2020-12-22 06:19:35,039 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 5352 transitions. Word has length 60 [2020-12-22 06:19:35,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:35,039 INFO L481 AbstractCegarLoop]: Abstraction has 2959 states and 5352 transitions. [2020-12-22 06:19:35,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:35,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 5352 transitions. [2020-12-22 06:19:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:19:35,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:35,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:19:35,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:19:35,044 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:35,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:35,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1406324379, now seen corresponding path program 1 times [2020-12-22 06:19:35,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:35,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529526408] [2020-12-22 06:19:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:35,106 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 06:19:35,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529526408] [2020-12-22 06:19:35,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:35,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:35,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637588265] [2020-12-22 06:19:35,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:35,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:35,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:35,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:35,109 INFO L87 Difference]: Start difference. First operand 2959 states and 5352 transitions. Second operand 3 states. [2020-12-22 06:19:35,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:35,394 INFO L93 Difference]: Finished difference Result 7963 states and 14432 transitions. [2020-12-22 06:19:35,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:35,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 06:19:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:35,423 INFO L225 Difference]: With dead ends: 7963 [2020-12-22 06:19:35,423 INFO L226 Difference]: Without dead ends: 5173 [2020-12-22 06:19:35,428 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 06:19:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5173 states. [2020-12-22 06:19:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5173 to 5113. [2020-12-22 06:19:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5113 states. [2020-12-22 06:19:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 9257 transitions. [2020-12-22 06:19:35,756 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 9257 transitions. Word has length 61 [2020-12-22 06:19:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:35,756 INFO L481 AbstractCegarLoop]: Abstraction has 5113 states and 9257 transitions. [2020-12-22 06:19:35,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 9257 transitions. [2020-12-22 06:19:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:19:35,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:35,761 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 06:19:35,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:19:35,761 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:35,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:35,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1854502341, now seen corresponding path program 1 times [2020-12-22 06:19:35,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:35,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029244373] [2020-12-22 06:19:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:35,820 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 06:19:35,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029244373] [2020-12-22 06:19:35,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:35,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:35,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703474614] [2020-12-22 06:19:35,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:35,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:35,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:35,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:35,827 INFO L87 Difference]: Start difference. First operand 5113 states and 9257 transitions. Second operand 3 states. [2020-12-22 06:19:36,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:36,345 INFO L93 Difference]: Finished difference Result 14883 states and 26989 transitions. [2020-12-22 06:19:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:36,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 06:19:36,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:36,395 INFO L225 Difference]: With dead ends: 14883 [2020-12-22 06:19:36,395 INFO L226 Difference]: Without dead ends: 9943 [2020-12-22 06:19:36,403 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 06:19:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9943 states. [2020-12-22 06:19:36,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9943 to 9883. [2020-12-22 06:19:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9883 states. [2020-12-22 06:19:37,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9883 states to 9883 states and 17898 transitions. [2020-12-22 06:19:37,029 INFO L78 Accepts]: Start accepts. Automaton has 9883 states and 17898 transitions. Word has length 62 [2020-12-22 06:19:37,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:37,029 INFO L481 AbstractCegarLoop]: Abstraction has 9883 states and 17898 transitions. [2020-12-22 06:19:37,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:37,030 INFO L276 IsEmpty]: Start isEmpty. Operand 9883 states and 17898 transitions. [2020-12-22 06:19:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:19:37,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:37,035 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 06:19:37,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:19:37,036 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:37,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1182195820, now seen corresponding path program 1 times [2020-12-22 06:19:37,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:37,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116056983] [2020-12-22 06:19:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:37,107 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 06:19:37,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116056983] [2020-12-22 06:19:37,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:37,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:37,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171019428] [2020-12-22 06:19:37,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:37,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:37,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:37,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:37,110 INFO L87 Difference]: Start difference. First operand 9883 states and 17898 transitions. Second operand 3 states. [2020-12-22 06:19:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:38,096 INFO L93 Difference]: Finished difference Result 28895 states and 52387 transitions. [2020-12-22 06:19:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:38,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 06:19:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:38,151 INFO L225 Difference]: With dead ends: 28895 [2020-12-22 06:19:38,152 INFO L226 Difference]: Without dead ends: 19193 [2020-12-22 06:19:38,168 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 06:19:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19193 states. [2020-12-22 06:19:39,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19193 to 19133. [2020-12-22 06:19:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19133 states. [2020-12-22 06:19:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19133 states to 19133 states and 34635 transitions. [2020-12-22 06:19:39,151 INFO L78 Accepts]: Start accepts. Automaton has 19133 states and 34635 transitions. Word has length 63 [2020-12-22 06:19:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:39,151 INFO L481 AbstractCegarLoop]: Abstraction has 19133 states and 34635 transitions. [2020-12-22 06:19:39,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 19133 states and 34635 transitions. [2020-12-22 06:19:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:19:39,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:39,158 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 06:19:39,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:19:39,158 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:39,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:39,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2036943097, now seen corresponding path program 1 times [2020-12-22 06:19:39,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:39,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583906608] [2020-12-22 06:19:39,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:39,222 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 06:19:39,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583906608] [2020-12-22 06:19:39,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:39,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:39,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013583560] [2020-12-22 06:19:39,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:39,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:39,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:39,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:39,225 INFO L87 Difference]: Start difference. First operand 19133 states and 34635 transitions. Second operand 3 states. [2020-12-22 06:19:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:40,698 INFO L93 Difference]: Finished difference Result 56831 states and 102912 transitions. [2020-12-22 06:19:40,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:40,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 06:19:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:40,881 INFO L225 Difference]: With dead ends: 56831 [2020-12-22 06:19:40,883 INFO L226 Difference]: Without dead ends: 37883 [2020-12-22 06:19:40,933 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 06:19:41,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37883 states. [2020-12-22 06:19:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37883 to 37823. [2020-12-22 06:19:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37823 states. [2020-12-22 06:19:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37823 states to 37823 states and 68364 transitions. [2020-12-22 06:19:42,667 INFO L78 Accepts]: Start accepts. Automaton has 37823 states and 68364 transitions. Word has length 64 [2020-12-22 06:19:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:42,667 INFO L481 AbstractCegarLoop]: Abstraction has 37823 states and 68364 transitions. [2020-12-22 06:19:42,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:42,667 INFO L276 IsEmpty]: Start isEmpty. Operand 37823 states and 68364 transitions. [2020-12-22 06:19:42,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:19:42,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:42,674 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:19:42,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:19:42,674 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:42,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1652780325, now seen corresponding path program 1 times [2020-12-22 06:19:42,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:42,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140552541] [2020-12-22 06:19:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 06:19:42,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140552541] [2020-12-22 06:19:42,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:42,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:19:42,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553827597] [2020-12-22 06:19:42,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:19:42,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:42,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:19:42,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:19:42,753 INFO L87 Difference]: Start difference. First operand 37823 states and 68364 transitions. Second operand 5 states. [2020-12-22 06:19:45,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:45,317 INFO L93 Difference]: Finished difference Result 111172 states and 200905 transitions. [2020-12-22 06:19:45,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:19:45,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 06:19:45,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:45,467 INFO L225 Difference]: With dead ends: 111172 [2020-12-22 06:19:45,468 INFO L226 Difference]: Without dead ends: 73602 [2020-12-22 06:19:45,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:19:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73602 states. [2020-12-22 06:19:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73602 to 37823. [2020-12-22 06:19:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37823 states. [2020-12-22 06:19:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37823 states to 37823 states and 68106 transitions. [2020-12-22 06:19:47,606 INFO L78 Accepts]: Start accepts. Automaton has 37823 states and 68106 transitions. Word has length 65 [2020-12-22 06:19:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:47,606 INFO L481 AbstractCegarLoop]: Abstraction has 37823 states and 68106 transitions. [2020-12-22 06:19:47,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:19:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 37823 states and 68106 transitions. [2020-12-22 06:19:47,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:19:47,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:47,613 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:19:47,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:19:47,613 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:47,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:47,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1964722695, now seen corresponding path program 2 times [2020-12-22 06:19:47,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:47,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433462880] [2020-12-22 06:19:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:19:47,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433462880] [2020-12-22 06:19:47,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:47,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:47,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960203362] [2020-12-22 06:19:47,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:47,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:47,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:47,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:47,681 INFO L87 Difference]: Start difference. First operand 37823 states and 68106 transitions. Second operand 3 states. [2020-12-22 06:19:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:49,179 INFO L93 Difference]: Finished difference Result 75447 states and 135866 transitions. [2020-12-22 06:19:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:49,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 06:19:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:49,238 INFO L225 Difference]: With dead ends: 75447 [2020-12-22 06:19:49,238 INFO L226 Difference]: Without dead ends: 37883 [2020-12-22 06:19:49,264 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 06:19:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37883 states. [2020-12-22 06:19:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37883 to 37823. [2020-12-22 06:19:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37823 states. [2020-12-22 06:19:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37823 states to 37823 states and 67978 transitions. [2020-12-22 06:19:50,975 INFO L78 Accepts]: Start accepts. Automaton has 37823 states and 67978 transitions. Word has length 65 [2020-12-22 06:19:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:50,975 INFO L481 AbstractCegarLoop]: Abstraction has 37823 states and 67978 transitions. [2020-12-22 06:19:50,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 37823 states and 67978 transitions. [2020-12-22 06:19:50,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:19:50,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:50,980 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 06:19:50,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:19:50,981 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:50,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:50,981 INFO L82 PathProgramCache]: Analyzing trace with hash -704997786, now seen corresponding path program 1 times [2020-12-22 06:19:50,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:50,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658527152] [2020-12-22 06:19:50,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:51,044 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 06:19:51,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658527152] [2020-12-22 06:19:51,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:51,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:19:51,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338999304] [2020-12-22 06:19:51,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:19:51,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:51,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:19:51,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:19:51,046 INFO L87 Difference]: Start difference. First operand 37823 states and 67978 transitions. Second operand 3 states. [2020-12-22 06:19:53,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:53,612 INFO L93 Difference]: Finished difference Result 105057 states and 188548 transitions. [2020-12-22 06:19:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:19:53,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 06:19:53,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:53,728 INFO L225 Difference]: With dead ends: 105057 [2020-12-22 06:19:53,728 INFO L226 Difference]: Without dead ends: 67453 [2020-12-22 06:19:53,767 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 06:19:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67453 states. [2020-12-22 06:19:56,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67453 to 67393. [2020-12-22 06:19:56,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67393 states. [2020-12-22 06:19:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67393 states to 67393 states and 120587 transitions. [2020-12-22 06:19:56,681 INFO L78 Accepts]: Start accepts. Automaton has 67393 states and 120587 transitions. Word has length 65 [2020-12-22 06:19:56,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:19:56,681 INFO L481 AbstractCegarLoop]: Abstraction has 67393 states and 120587 transitions. [2020-12-22 06:19:56,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:19:56,681 INFO L276 IsEmpty]: Start isEmpty. Operand 67393 states and 120587 transitions. [2020-12-22 06:19:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:19:56,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:19:56,686 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:19:56,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:19:56,687 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:19:56,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:19:56,687 INFO L82 PathProgramCache]: Analyzing trace with hash 301605695, now seen corresponding path program 1 times [2020-12-22 06:19:56,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:19:56,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351770849] [2020-12-22 06:19:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:19:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:19:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:19:56,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351770849] [2020-12-22 06:19:56,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:19:56,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 06:19:56,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351303948] [2020-12-22 06:19:56,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 06:19:56,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:19:56,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 06:19:56,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 06:19:56,790 INFO L87 Difference]: Start difference. First operand 67393 states and 120587 transitions. Second operand 10 states. [2020-12-22 06:19:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:19:59,902 INFO L93 Difference]: Finished difference Result 67668 states and 120952 transitions. [2020-12-22 06:19:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 06:19:59,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-12-22 06:19:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:19:59,998 INFO L225 Difference]: With dead ends: 67668 [2020-12-22 06:19:59,998 INFO L226 Difference]: Without dead ends: 67630 [2020-12-22 06:20:00,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 06:20:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67630 states. [2020-12-22 06:20:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67630 to 67413. [2020-12-22 06:20:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67413 states. [2020-12-22 06:20:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67413 states to 67413 states and 120613 transitions. [2020-12-22 06:20:03,195 INFO L78 Accepts]: Start accepts. Automaton has 67413 states and 120613 transitions. Word has length 66 [2020-12-22 06:20:03,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:03,195 INFO L481 AbstractCegarLoop]: Abstraction has 67413 states and 120613 transitions. [2020-12-22 06:20:03,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 06:20:03,195 INFO L276 IsEmpty]: Start isEmpty. Operand 67413 states and 120613 transitions. [2020-12-22 06:20:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:20:03,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:03,203 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:03,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:20:03,203 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:03,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:03,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2020614073, now seen corresponding path program 1 times [2020-12-22 06:20:03,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:03,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826047769] [2020-12-22 06:20:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:20:03,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826047769] [2020-12-22 06:20:03,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:03,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:20:03,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502345835] [2020-12-22 06:20:03,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:20:03,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:03,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:20:03,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:20:03,480 INFO L87 Difference]: Start difference. First operand 67413 states and 120613 transitions. Second operand 4 states. [2020-12-22 06:20:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:05,751 INFO L93 Difference]: Finished difference Result 67437 states and 120647 transitions. [2020-12-22 06:20:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:20:05,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 06:20:05,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:05,753 INFO L225 Difference]: With dead ends: 67437 [2020-12-22 06:20:05,753 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 06:20:05,776 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 06:20:05,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 06:20:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 06:20:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 06:20:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 06:20:05,777 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2020-12-22 06:20:05,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:05,777 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 06:20:05,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:20:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 06:20:05,777 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 06:20:05,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:20:05,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 06:20:05,941 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-12-22 06:20:06,127 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 115 [2020-12-22 06:20:09,705 WARN L197 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 705 DAG size of output: 696 [2020-12-22 06:20:09,877 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 115 [2020-12-22 06:20:18,972 WARN L197 SmtUtils]: Spent 9.09 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:20:27,754 WARN L197 SmtUtils]: Spent 8.68 s on a formula simplification. DAG size of input: 1362 DAG size of output: 1156 [2020-12-22 06:20:35,946 WARN L197 SmtUtils]: Spent 8.18 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:20:44,144 WARN L197 SmtUtils]: Spent 8.15 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:20:52,262 WARN L197 SmtUtils]: Spent 8.11 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:21:00,237 WARN L197 SmtUtils]: Spent 7.97 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:21:00,362 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 06:21:08,436 WARN L197 SmtUtils]: Spent 8.03 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:21:16,458 WARN L197 SmtUtils]: Spent 8.02 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:21:24,508 WARN L197 SmtUtils]: Spent 8.04 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:21:27,214 WARN L197 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 708 DAG size of output: 657 [2020-12-22 06:21:28,521 WARN L197 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 324 DAG size of output: 316 [2020-12-22 06:21:30,768 WARN L197 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 708 DAG size of output: 644 [2020-12-22 06:21:33,053 WARN L197 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 708 DAG size of output: 644 [2020-12-22 06:21:35,310 WARN L197 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 708 DAG size of output: 644 [2020-12-22 06:21:37,482 WARN L197 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 1092 DAG size of output: 756 [2020-12-22 06:21:45,557 WARN L197 SmtUtils]: Spent 8.07 s on a formula simplification. DAG size of input: 1351 DAG size of output: 1147 [2020-12-22 06:21:47,612 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 1092 DAG size of output: 756 [2020-12-22 06:21:49,666 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 1092 DAG size of output: 756 [2020-12-22 06:21:51,999 WARN L197 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 705 DAG size of output: 696 [2020-12-22 06:21:54,444 WARN L197 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 705 DAG size of output: 696 [2020-12-22 06:21:55,776 WARN L197 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 324 DAG size of output: 316 [2020-12-22 06:22:04,013 WARN L197 SmtUtils]: Spent 8.23 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:22:06,312 WARN L197 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 705 DAG size of output: 696 [2020-12-22 06:22:08,639 WARN L197 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 708 DAG size of output: 657 [2020-12-22 06:22:11,014 WARN L197 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 705 DAG size of output: 696 [2020-12-22 06:22:13,317 WARN L197 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 708 DAG size of output: 657 [2020-12-22 06:22:21,459 WARN L197 SmtUtils]: Spent 8.09 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:22:29,455 WARN L197 SmtUtils]: Spent 7.99 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:22:37,522 WARN L197 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:22:39,857 WARN L197 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 705 DAG size of output: 696 [2020-12-22 06:22:42,201 WARN L197 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 708 DAG size of output: 657 [2020-12-22 06:22:50,216 WARN L197 SmtUtils]: Spent 8.01 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:22:52,482 WARN L197 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 708 DAG size of output: 644 [2020-12-22 06:22:54,824 WARN L197 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 705 DAG size of output: 696 [2020-12-22 06:22:56,970 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 1092 DAG size of output: 756 [2020-12-22 06:23:04,920 WARN L197 SmtUtils]: Spent 7.95 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:23:07,222 WARN L197 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 705 DAG size of output: 696 [2020-12-22 06:23:09,556 WARN L197 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 708 DAG size of output: 657 [2020-12-22 06:23:11,833 WARN L197 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 708 DAG size of output: 644 [2020-12-22 06:23:13,906 WARN L197 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 1092 DAG size of output: 756 [2020-12-22 06:23:16,180 WARN L197 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 701 DAG size of output: 690 [2020-12-22 06:23:24,186 WARN L197 SmtUtils]: Spent 8.00 s on a formula simplification. DAG size of input: 1348 DAG size of output: 1144 [2020-12-22 06:23:24,430 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 27 [2020-12-22 06:23:24,802 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 31 [2020-12-22 06:23:32,942 WARN L197 SmtUtils]: Spent 8.13 s on a formula simplification. DAG size of input: 694 DAG size of output: 29 [2020-12-22 06:23:33,166 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 21 [2020-12-22 06:23:33,555 WARN L197 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 31