/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:52:30,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:52:30,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:52:30,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:52:30,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:52:30,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:52:30,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:52:30,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:52:30,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:52:30,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:52:30,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:52:30,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:52:30,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:52:30,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:52:30,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:52:30,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:52:30,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:52:30,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:52:30,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:52:30,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:52:30,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:52:30,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:52:30,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:52:30,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:52:30,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:52:30,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:52:30,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:52:30,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:52:30,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:52:30,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:52:30,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:52:30,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:52:30,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:52:30,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:52:30,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:52:30,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:52:30,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:52:30,437 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:52:30,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:52:30,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:52:30,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:52:30,442 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:52:30,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:52:30,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:52:30,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:52:30,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:52:30,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:52:30,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:52:30,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:52:30,445 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:52:30,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:52:30,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:52:30,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:52:30,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:52:30,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:52:30,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:52:30,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:52:30,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:52:30,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:52:30,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:52:30,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:52:30,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:52:30,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:52:30,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:52:30,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:52:30,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:52:30,866 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:52:30,867 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:52:30,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:52:30,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319a9c142/c461b4f727d94ac1b4c41678e2f082c1/FLAGa2dd49083 [2020-12-22 08:52:31,632 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:52:31,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:52:31,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319a9c142/c461b4f727d94ac1b4c41678e2f082c1/FLAGa2dd49083 [2020-12-22 08:52:31,903 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319a9c142/c461b4f727d94ac1b4c41678e2f082c1 [2020-12-22 08:52:31,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:52:31,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:52:31,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:52:31,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:52:31,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:52:31,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:52:31" (1/1) ... [2020-12-22 08:52:31,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@726c6b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:52:31, skipping insertion in model container [2020-12-22 08:52:31,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:52:31" (1/1) ... [2020-12-22 08:52:31,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:52:31,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:52:32,302 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8690,8703] [2020-12-22 08:52:32,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:52:32,384 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:52:32,490 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8690,8703] [2020-12-22 08:52:32,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:52:32,592 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:52:32,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:52:32 WrapperNode [2020-12-22 08:52:32,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:52:32,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:52:32,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:52:32,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:52:32,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:52:32" (1/1) ... [2020-12-22 08:52:32,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:52:32" (1/1) ... [2020-12-22 08:52:32,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:52:32,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:52:32,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:52:32,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:52:32,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:52:32" (1/1) ... [2020-12-22 08:52:32,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:52:32" (1/1) ... [2020-12-22 08:52:32,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:52:32" (1/1) ... [2020-12-22 08:52:32,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:52:32" (1/1) ... [2020-12-22 08:52:32,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:52:32" (1/1) ... [2020-12-22 08:52:32,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:52:32" (1/1) ... [2020-12-22 08:52:32,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:52:32" (1/1) ... [2020-12-22 08:52:32,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:52:32,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:52:32,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:52:32,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:52:32,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:52:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:52:32,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:52:32,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:52:32,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:52:32,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:52:33,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:52:33,966 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:52:33,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:52:33 BoogieIcfgContainer [2020-12-22 08:52:33,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:52:33,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:52:33,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:52:33,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:52:33,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:52:31" (1/3) ... [2020-12-22 08:52:33,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bff3438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:52:33, skipping insertion in model container [2020-12-22 08:52:33,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:52:32" (2/3) ... [2020-12-22 08:52:33,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bff3438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:52:33, skipping insertion in model container [2020-12-22 08:52:33,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:52:33" (3/3) ... [2020-12-22 08:52:33,978 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:52:33,985 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:52:33,990 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:52:34,010 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:52:34,042 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:52:34,042 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:52:34,043 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:52:34,043 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:52:34,043 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:52:34,043 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:52:34,043 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:52:34,043 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:52:34,064 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states. [2020-12-22 08:52:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 08:52:34,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:34,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:34,076 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:34,083 INFO L82 PathProgramCache]: Analyzing trace with hash -822713823, now seen corresponding path program 1 times [2020-12-22 08:52:34,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:34,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434544901] [2020-12-22 08:52:34,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:34,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434544901] [2020-12-22 08:52:34,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:34,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:52:34,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865504331] [2020-12-22 08:52:34,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:52:34,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:34,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:52:34,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:52:34,671 INFO L87 Difference]: Start difference. First operand 177 states. Second operand 3 states. [2020-12-22 08:52:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:34,832 INFO L93 Difference]: Finished difference Result 347 states and 578 transitions. [2020-12-22 08:52:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:52:34,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-12-22 08:52:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:34,862 INFO L225 Difference]: With dead ends: 347 [2020-12-22 08:52:34,862 INFO L226 Difference]: Without dead ends: 267 [2020-12-22 08:52:34,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:52:34,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-22 08:52:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2020-12-22 08:52:34,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-12-22 08:52:34,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 384 transitions. [2020-12-22 08:52:34,962 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 384 transitions. Word has length 90 [2020-12-22 08:52:34,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:34,963 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 384 transitions. [2020-12-22 08:52:34,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:52:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 384 transitions. [2020-12-22 08:52:34,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 08:52:34,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:34,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:34,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:52:34,968 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:34,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:34,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1483332975, now seen corresponding path program 1 times [2020-12-22 08:52:34,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:34,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260166354] [2020-12-22 08:52:34,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:35,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260166354] [2020-12-22 08:52:35,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:35,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:52:35,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187241075] [2020-12-22 08:52:35,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:52:35,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:35,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:52:35,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:52:35,241 INFO L87 Difference]: Start difference. First operand 265 states and 384 transitions. Second operand 5 states. [2020-12-22 08:52:35,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:35,569 INFO L93 Difference]: Finished difference Result 464 states and 696 transitions. [2020-12-22 08:52:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:52:35,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2020-12-22 08:52:35,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:35,575 INFO L225 Difference]: With dead ends: 464 [2020-12-22 08:52:35,575 INFO L226 Difference]: Without dead ends: 265 [2020-12-22 08:52:35,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:52:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-22 08:52:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-12-22 08:52:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-12-22 08:52:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 381 transitions. [2020-12-22 08:52:35,636 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 381 transitions. Word has length 92 [2020-12-22 08:52:35,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:35,638 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 381 transitions. [2020-12-22 08:52:35,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:52:35,639 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 381 transitions. [2020-12-22 08:52:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:52:35,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:35,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:35,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:52:35,643 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:35,645 INFO L82 PathProgramCache]: Analyzing trace with hash -679996500, now seen corresponding path program 1 times [2020-12-22 08:52:35,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:35,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252623322] [2020-12-22 08:52:35,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:35,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252623322] [2020-12-22 08:52:35,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:35,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:52:35,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349686269] [2020-12-22 08:52:35,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:52:35,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:35,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:52:35,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:52:35,894 INFO L87 Difference]: Start difference. First operand 265 states and 381 transitions. Second operand 6 states. [2020-12-22 08:52:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:36,243 INFO L93 Difference]: Finished difference Result 665 states and 999 transitions. [2020-12-22 08:52:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:52:36,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-12-22 08:52:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:36,247 INFO L225 Difference]: With dead ends: 665 [2020-12-22 08:52:36,247 INFO L226 Difference]: Without dead ends: 446 [2020-12-22 08:52:36,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:52:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-12-22 08:52:36,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 444. [2020-12-22 08:52:36,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-12-22 08:52:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 661 transitions. [2020-12-22 08:52:36,294 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 661 transitions. Word has length 93 [2020-12-22 08:52:36,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:36,302 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 661 transitions. [2020-12-22 08:52:36,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:52:36,303 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 661 transitions. [2020-12-22 08:52:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 08:52:36,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:36,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:36,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:52:36,307 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:36,308 INFO L82 PathProgramCache]: Analyzing trace with hash 220884227, now seen corresponding path program 1 times [2020-12-22 08:52:36,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:36,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596744377] [2020-12-22 08:52:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:36,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596744377] [2020-12-22 08:52:36,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:36,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:52:36,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540332471] [2020-12-22 08:52:36,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:52:36,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:36,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:52:36,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:52:36,491 INFO L87 Difference]: Start difference. First operand 444 states and 661 transitions. Second operand 6 states. [2020-12-22 08:52:36,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:36,788 INFO L93 Difference]: Finished difference Result 1114 states and 1705 transitions. [2020-12-22 08:52:36,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:52:36,789 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 08:52:36,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:36,793 INFO L225 Difference]: With dead ends: 1114 [2020-12-22 08:52:36,793 INFO L226 Difference]: Without dead ends: 732 [2020-12-22 08:52:36,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:52:36,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2020-12-22 08:52:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 730. [2020-12-22 08:52:36,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2020-12-22 08:52:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1104 transitions. [2020-12-22 08:52:36,843 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1104 transitions. Word has length 94 [2020-12-22 08:52:36,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:36,844 INFO L481 AbstractCegarLoop]: Abstraction has 730 states and 1104 transitions. [2020-12-22 08:52:36,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:52:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1104 transitions. [2020-12-22 08:52:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:52:36,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:36,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:36,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:52:36,846 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:36,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1812854412, now seen corresponding path program 1 times [2020-12-22 08:52:36,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:36,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354737723] [2020-12-22 08:52:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:36,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354737723] [2020-12-22 08:52:36,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:36,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:52:36,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376959679] [2020-12-22 08:52:37,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:52:37,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:37,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:52:37,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:52:37,002 INFO L87 Difference]: Start difference. First operand 730 states and 1104 transitions. Second operand 6 states. [2020-12-22 08:52:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:37,360 INFO L93 Difference]: Finished difference Result 1992 states and 3064 transitions. [2020-12-22 08:52:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:52:37,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2020-12-22 08:52:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:37,371 INFO L225 Difference]: With dead ends: 1992 [2020-12-22 08:52:37,372 INFO L226 Difference]: Without dead ends: 1320 [2020-12-22 08:52:37,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:52:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2020-12-22 08:52:37,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1318. [2020-12-22 08:52:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1318 states. [2020-12-22 08:52:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 2011 transitions. [2020-12-22 08:52:37,477 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 2011 transitions. Word has length 95 [2020-12-22 08:52:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:37,478 INFO L481 AbstractCegarLoop]: Abstraction has 1318 states and 2011 transitions. [2020-12-22 08:52:37,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:52:37,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 2011 transitions. [2020-12-22 08:52:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 08:52:37,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:37,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:37,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:52:37,480 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:37,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1555751831, now seen corresponding path program 1 times [2020-12-22 08:52:37,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:37,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939710302] [2020-12-22 08:52:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:37,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939710302] [2020-12-22 08:52:37,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:37,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:52:37,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29342664] [2020-12-22 08:52:37,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:52:37,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:37,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:52:37,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:52:37,608 INFO L87 Difference]: Start difference. First operand 1318 states and 2011 transitions. Second operand 5 states. [2020-12-22 08:52:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:37,914 INFO L93 Difference]: Finished difference Result 2582 states and 3966 transitions. [2020-12-22 08:52:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:52:37,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2020-12-22 08:52:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:37,922 INFO L225 Difference]: With dead ends: 2582 [2020-12-22 08:52:37,923 INFO L226 Difference]: Without dead ends: 1318 [2020-12-22 08:52:37,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:52:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2020-12-22 08:52:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1318. [2020-12-22 08:52:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1318 states. [2020-12-22 08:52:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 1994 transitions. [2020-12-22 08:52:38,033 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 1994 transitions. Word has length 96 [2020-12-22 08:52:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:38,033 INFO L481 AbstractCegarLoop]: Abstraction has 1318 states and 1994 transitions. [2020-12-22 08:52:38,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:52:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 1994 transitions. [2020-12-22 08:52:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 08:52:38,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:38,035 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:38,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:52:38,035 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:38,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1288381152, now seen corresponding path program 1 times [2020-12-22 08:52:38,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:38,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671642181] [2020-12-22 08:52:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:38,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671642181] [2020-12-22 08:52:38,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:38,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:52:38,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712339684] [2020-12-22 08:52:38,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:52:38,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:38,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:52:38,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:52:38,155 INFO L87 Difference]: Start difference. First operand 1318 states and 1994 transitions. Second operand 5 states. [2020-12-22 08:52:38,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:38,435 INFO L93 Difference]: Finished difference Result 2586 states and 3937 transitions. [2020-12-22 08:52:38,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:52:38,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 97 [2020-12-22 08:52:38,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:38,442 INFO L225 Difference]: With dead ends: 2586 [2020-12-22 08:52:38,442 INFO L226 Difference]: Without dead ends: 1318 [2020-12-22 08:52:38,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:52:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2020-12-22 08:52:38,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1318. [2020-12-22 08:52:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1318 states. [2020-12-22 08:52:38,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 1977 transitions. [2020-12-22 08:52:38,552 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 1977 transitions. Word has length 97 [2020-12-22 08:52:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:38,552 INFO L481 AbstractCegarLoop]: Abstraction has 1318 states and 1977 transitions. [2020-12-22 08:52:38,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:52:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 1977 transitions. [2020-12-22 08:52:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 08:52:38,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:38,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:38,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:52:38,554 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:38,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1831345451, now seen corresponding path program 1 times [2020-12-22 08:52:38,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:38,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006062265] [2020-12-22 08:52:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:38,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006062265] [2020-12-22 08:52:38,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:38,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:52:38,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812639165] [2020-12-22 08:52:38,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 08:52:38,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:38,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 08:52:38,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:52:38,730 INFO L87 Difference]: Start difference. First operand 1318 states and 1977 transitions. Second operand 8 states. [2020-12-22 08:52:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:39,653 INFO L93 Difference]: Finished difference Result 8176 states and 12428 transitions. [2020-12-22 08:52:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 08:52:39,654 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-12-22 08:52:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:39,689 INFO L225 Difference]: With dead ends: 8176 [2020-12-22 08:52:39,689 INFO L226 Difference]: Without dead ends: 7126 [2020-12-22 08:52:39,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:52:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2020-12-22 08:52:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 1853. [2020-12-22 08:52:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1853 states. [2020-12-22 08:52:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 2797 transitions. [2020-12-22 08:52:40,012 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 2797 transitions. Word has length 98 [2020-12-22 08:52:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:40,013 INFO L481 AbstractCegarLoop]: Abstraction has 1853 states and 2797 transitions. [2020-12-22 08:52:40,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 08:52:40,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 2797 transitions. [2020-12-22 08:52:40,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 08:52:40,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:40,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:40,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:52:40,015 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:40,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:40,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1269789971, now seen corresponding path program 1 times [2020-12-22 08:52:40,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:40,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882598393] [2020-12-22 08:52:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:40,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882598393] [2020-12-22 08:52:40,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:40,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:52:40,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596329958] [2020-12-22 08:52:40,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 08:52:40,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:40,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 08:52:40,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:52:40,209 INFO L87 Difference]: Start difference. First operand 1853 states and 2797 transitions. Second operand 8 states. [2020-12-22 08:52:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:41,347 INFO L93 Difference]: Finished difference Result 8562 states and 13024 transitions. [2020-12-22 08:52:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 08:52:41,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-12-22 08:52:41,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:41,392 INFO L225 Difference]: With dead ends: 8562 [2020-12-22 08:52:41,392 INFO L226 Difference]: Without dead ends: 7512 [2020-12-22 08:52:41,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:52:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7512 states. [2020-12-22 08:52:41,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7512 to 3045. [2020-12-22 08:52:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3045 states. [2020-12-22 08:52:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3045 states to 3045 states and 4625 transitions. [2020-12-22 08:52:41,878 INFO L78 Accepts]: Start accepts. Automaton has 3045 states and 4625 transitions. Word has length 98 [2020-12-22 08:52:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:41,878 INFO L481 AbstractCegarLoop]: Abstraction has 3045 states and 4625 transitions. [2020-12-22 08:52:41,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 08:52:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3045 states and 4625 transitions. [2020-12-22 08:52:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 08:52:41,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:41,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:41,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:52:41,882 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2040892797, now seen corresponding path program 1 times [2020-12-22 08:52:41,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:41,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520671017] [2020-12-22 08:52:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:42,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520671017] [2020-12-22 08:52:42,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:42,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:52:42,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619257816] [2020-12-22 08:52:42,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 08:52:42,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:42,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 08:52:42,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:52:42,063 INFO L87 Difference]: Start difference. First operand 3045 states and 4625 transitions. Second operand 8 states. [2020-12-22 08:52:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:43,427 INFO L93 Difference]: Finished difference Result 9026 states and 13736 transitions. [2020-12-22 08:52:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 08:52:43,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-12-22 08:52:43,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:43,463 INFO L225 Difference]: With dead ends: 9026 [2020-12-22 08:52:43,463 INFO L226 Difference]: Without dead ends: 7976 [2020-12-22 08:52:43,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:52:43,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7976 states. [2020-12-22 08:52:43,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7976 to 3593. [2020-12-22 08:52:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3593 states. [2020-12-22 08:52:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5461 transitions. [2020-12-22 08:52:43,988 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5461 transitions. Word has length 98 [2020-12-22 08:52:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:43,988 INFO L481 AbstractCegarLoop]: Abstraction has 3593 states and 5461 transitions. [2020-12-22 08:52:43,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 08:52:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5461 transitions. [2020-12-22 08:52:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 08:52:43,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:43,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:43,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:52:43,991 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:43,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:43,991 INFO L82 PathProgramCache]: Analyzing trace with hash 962907459, now seen corresponding path program 1 times [2020-12-22 08:52:43,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:43,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952299935] [2020-12-22 08:52:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:44,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952299935] [2020-12-22 08:52:44,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:44,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:52:44,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016745777] [2020-12-22 08:52:44,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:52:44,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:44,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:52:44,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:52:44,049 INFO L87 Difference]: Start difference. First operand 3593 states and 5461 transitions. Second operand 3 states. [2020-12-22 08:52:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:45,096 INFO L93 Difference]: Finished difference Result 9741 states and 14791 transitions. [2020-12-22 08:52:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:52:45,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2020-12-22 08:52:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:45,110 INFO L225 Difference]: With dead ends: 9741 [2020-12-22 08:52:45,110 INFO L226 Difference]: Without dead ends: 6531 [2020-12-22 08:52:45,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:52:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6531 states. [2020-12-22 08:52:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6531 to 6433. [2020-12-22 08:52:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6433 states. [2020-12-22 08:52:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6433 states to 6433 states and 9653 transitions. [2020-12-22 08:52:45,874 INFO L78 Accepts]: Start accepts. Automaton has 6433 states and 9653 transitions. Word has length 98 [2020-12-22 08:52:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:45,874 INFO L481 AbstractCegarLoop]: Abstraction has 6433 states and 9653 transitions. [2020-12-22 08:52:45,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:52:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand 6433 states and 9653 transitions. [2020-12-22 08:52:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 08:52:45,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:45,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:45,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:52:45,877 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:45,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:45,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1206985122, now seen corresponding path program 1 times [2020-12-22 08:52:45,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:45,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76064732] [2020-12-22 08:52:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:45,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76064732] [2020-12-22 08:52:45,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:45,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:52:45,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437274008] [2020-12-22 08:52:45,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:52:45,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:45,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:52:45,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:52:45,943 INFO L87 Difference]: Start difference. First operand 6433 states and 9653 transitions. Second operand 3 states. [2020-12-22 08:52:47,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:47,334 INFO L93 Difference]: Finished difference Result 16517 states and 24807 transitions. [2020-12-22 08:52:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:52:47,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2020-12-22 08:52:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:47,357 INFO L225 Difference]: With dead ends: 16517 [2020-12-22 08:52:47,358 INFO L226 Difference]: Without dead ends: 10467 [2020-12-22 08:52:47,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:52:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10467 states. [2020-12-22 08:52:48,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10467 to 10465. [2020-12-22 08:52:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10465 states. [2020-12-22 08:52:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10465 states to 10465 states and 15621 transitions. [2020-12-22 08:52:48,516 INFO L78 Accepts]: Start accepts. Automaton has 10465 states and 15621 transitions. Word has length 98 [2020-12-22 08:52:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:48,516 INFO L481 AbstractCegarLoop]: Abstraction has 10465 states and 15621 transitions. [2020-12-22 08:52:48,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:52:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 10465 states and 15621 transitions. [2020-12-22 08:52:48,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 08:52:48,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:48,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:48,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:52:48,519 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:48,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1451030825, now seen corresponding path program 1 times [2020-12-22 08:52:48,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:48,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42516992] [2020-12-22 08:52:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:48,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42516992] [2020-12-22 08:52:48,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:48,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:52:48,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820245894] [2020-12-22 08:52:48,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 08:52:48,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:48,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 08:52:48,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:52:48,677 INFO L87 Difference]: Start difference. First operand 10465 states and 15621 transitions. Second operand 8 states. [2020-12-22 08:52:51,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:51,881 INFO L93 Difference]: Finished difference Result 27994 states and 41886 transitions. [2020-12-22 08:52:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 08:52:51,881 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-12-22 08:52:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:51,937 INFO L225 Difference]: With dead ends: 27994 [2020-12-22 08:52:51,938 INFO L226 Difference]: Without dead ends: 25000 [2020-12-22 08:52:51,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:52:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25000 states. [2020-12-22 08:52:53,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25000 to 12523. [2020-12-22 08:52:53,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12523 states. [2020-12-22 08:52:53,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12523 states to 12523 states and 18697 transitions. [2020-12-22 08:52:53,391 INFO L78 Accepts]: Start accepts. Automaton has 12523 states and 18697 transitions. Word has length 98 [2020-12-22 08:52:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:53,391 INFO L481 AbstractCegarLoop]: Abstraction has 12523 states and 18697 transitions. [2020-12-22 08:52:53,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 08:52:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 12523 states and 18697 transitions. [2020-12-22 08:52:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 08:52:53,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:53,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:53,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:52:53,394 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:53,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1964085863, now seen corresponding path program 1 times [2020-12-22 08:52:53,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:53,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480407912] [2020-12-22 08:52:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:53,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480407912] [2020-12-22 08:52:53,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:53,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:52:53,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997268016] [2020-12-22 08:52:53,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 08:52:53,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:53,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 08:52:53,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:52:53,545 INFO L87 Difference]: Start difference. First operand 12523 states and 18697 transitions. Second operand 8 states. [2020-12-22 08:52:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:52:56,912 INFO L93 Difference]: Finished difference Result 30216 states and 45212 transitions. [2020-12-22 08:52:56,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 08:52:56,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-12-22 08:52:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:52:56,959 INFO L225 Difference]: With dead ends: 30216 [2020-12-22 08:52:56,959 INFO L226 Difference]: Without dead ends: 27222 [2020-12-22 08:52:56,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:52:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27222 states. [2020-12-22 08:52:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27222 to 14625. [2020-12-22 08:52:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14625 states. [2020-12-22 08:52:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14625 states to 14625 states and 21841 transitions. [2020-12-22 08:52:59,045 INFO L78 Accepts]: Start accepts. Automaton has 14625 states and 21841 transitions. Word has length 98 [2020-12-22 08:52:59,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:52:59,046 INFO L481 AbstractCegarLoop]: Abstraction has 14625 states and 21841 transitions. [2020-12-22 08:52:59,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 08:52:59,046 INFO L276 IsEmpty]: Start isEmpty. Operand 14625 states and 21841 transitions. [2020-12-22 08:52:59,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 08:52:59,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:52:59,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:52:59,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:52:59,050 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:52:59,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:52:59,050 INFO L82 PathProgramCache]: Analyzing trace with hash -472584635, now seen corresponding path program 1 times [2020-12-22 08:52:59,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:52:59,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919681438] [2020-12-22 08:52:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:52:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:52:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:52:59,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919681438] [2020-12-22 08:52:59,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:52:59,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:52:59,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879803449] [2020-12-22 08:52:59,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 08:52:59,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:52:59,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 08:52:59,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:52:59,215 INFO L87 Difference]: Start difference. First operand 14625 states and 21841 transitions. Second operand 8 states. [2020-12-22 08:53:03,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:53:03,071 INFO L93 Difference]: Finished difference Result 32188 states and 48160 transitions. [2020-12-22 08:53:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 08:53:03,072 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-12-22 08:53:03,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:53:03,112 INFO L225 Difference]: With dead ends: 32188 [2020-12-22 08:53:03,112 INFO L226 Difference]: Without dead ends: 29194 [2020-12-22 08:53:03,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:53:03,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29194 states. [2020-12-22 08:53:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29194 to 16693. [2020-12-22 08:53:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16693 states. [2020-12-22 08:53:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16693 states to 16693 states and 24933 transitions. [2020-12-22 08:53:05,573 INFO L78 Accepts]: Start accepts. Automaton has 16693 states and 24933 transitions. Word has length 98 [2020-12-22 08:53:05,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:53:05,573 INFO L481 AbstractCegarLoop]: Abstraction has 16693 states and 24933 transitions. [2020-12-22 08:53:05,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 08:53:05,574 INFO L276 IsEmpty]: Start isEmpty. Operand 16693 states and 24933 transitions. [2020-12-22 08:53:05,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 08:53:05,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:53:05,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:53:05,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:53:05,577 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:53:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:53:05,578 INFO L82 PathProgramCache]: Analyzing trace with hash 19008367, now seen corresponding path program 1 times [2020-12-22 08:53:05,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:53:05,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883374552] [2020-12-22 08:53:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:53:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:53:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:53:05,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883374552] [2020-12-22 08:53:05,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:53:05,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:53:05,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551758561] [2020-12-22 08:53:05,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:53:05,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:53:05,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:53:05,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:53:05,910 INFO L87 Difference]: Start difference. First operand 16693 states and 24933 transitions. Second operand 10 states. [2020-12-22 08:53:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:53:10,481 INFO L93 Difference]: Finished difference Result 41289 states and 61515 transitions. [2020-12-22 08:53:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:53:10,481 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-12-22 08:53:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:53:10,513 INFO L225 Difference]: With dead ends: 41289 [2020-12-22 08:53:10,513 INFO L226 Difference]: Without dead ends: 25091 [2020-12-22 08:53:10,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:53:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25091 states. [2020-12-22 08:53:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25091 to 16693. [2020-12-22 08:53:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16693 states. [2020-12-22 08:53:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16693 states to 16693 states and 24889 transitions. [2020-12-22 08:53:13,037 INFO L78 Accepts]: Start accepts. Automaton has 16693 states and 24889 transitions. Word has length 99 [2020-12-22 08:53:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:53:13,038 INFO L481 AbstractCegarLoop]: Abstraction has 16693 states and 24889 transitions. [2020-12-22 08:53:13,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:53:13,038 INFO L276 IsEmpty]: Start isEmpty. Operand 16693 states and 24889 transitions. [2020-12-22 08:53:13,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 08:53:13,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:53:13,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:53:13,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:53:13,042 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:53:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:53:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1246450513, now seen corresponding path program 1 times [2020-12-22 08:53:13,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:53:13,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806782407] [2020-12-22 08:53:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:53:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:53:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:53:13,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806782407] [2020-12-22 08:53:13,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:53:13,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:53:13,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711834825] [2020-12-22 08:53:13,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:53:13,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:53:13,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:53:13,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:53:13,270 INFO L87 Difference]: Start difference. First operand 16693 states and 24889 transitions. Second operand 9 states. [2020-12-22 08:53:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:53:18,824 INFO L93 Difference]: Finished difference Result 49068 states and 73263 transitions. [2020-12-22 08:53:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 08:53:18,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 100 [2020-12-22 08:53:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:53:18,852 INFO L225 Difference]: With dead ends: 49068 [2020-12-22 08:53:18,853 INFO L226 Difference]: Without dead ends: 32710 [2020-12-22 08:53:18,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:53:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32710 states. [2020-12-22 08:53:21,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32710 to 16528. [2020-12-22 08:53:21,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16528 states. [2020-12-22 08:53:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16528 states to 16528 states and 24652 transitions. [2020-12-22 08:53:21,730 INFO L78 Accepts]: Start accepts. Automaton has 16528 states and 24652 transitions. Word has length 100 [2020-12-22 08:53:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:53:21,730 INFO L481 AbstractCegarLoop]: Abstraction has 16528 states and 24652 transitions. [2020-12-22 08:53:21,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:53:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 16528 states and 24652 transitions. [2020-12-22 08:53:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 08:53:21,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:53:21,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:53:21,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:53:21,733 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:53:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:53:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash -922204693, now seen corresponding path program 1 times [2020-12-22 08:53:21,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:53:21,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202540557] [2020-12-22 08:53:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:53:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:53:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:53:21,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202540557] [2020-12-22 08:53:21,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:53:21,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:53:21,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315701985] [2020-12-22 08:53:21,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:53:21,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:53:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:53:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:53:21,960 INFO L87 Difference]: Start difference. First operand 16528 states and 24652 transitions. Second operand 10 states. [2020-12-22 08:53:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:53:26,310 INFO L93 Difference]: Finished difference Result 35603 states and 53059 transitions. [2020-12-22 08:53:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:53:26,311 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 100 [2020-12-22 08:53:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:53:26,332 INFO L225 Difference]: With dead ends: 35603 [2020-12-22 08:53:26,332 INFO L226 Difference]: Without dead ends: 19226 [2020-12-22 08:53:26,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:53:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19226 states. [2020-12-22 08:53:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19226 to 16528. [2020-12-22 08:53:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16528 states. [2020-12-22 08:53:29,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16528 states to 16528 states and 24650 transitions. [2020-12-22 08:53:29,343 INFO L78 Accepts]: Start accepts. Automaton has 16528 states and 24650 transitions. Word has length 100 [2020-12-22 08:53:29,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:53:29,343 INFO L481 AbstractCegarLoop]: Abstraction has 16528 states and 24650 transitions. [2020-12-22 08:53:29,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:53:29,343 INFO L276 IsEmpty]: Start isEmpty. Operand 16528 states and 24650 transitions. [2020-12-22 08:53:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 08:53:29,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:53:29,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:53:29,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:53:29,346 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:53:29,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:53:29,347 INFO L82 PathProgramCache]: Analyzing trace with hash -650346524, now seen corresponding path program 1 times [2020-12-22 08:53:29,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:53:29,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809749828] [2020-12-22 08:53:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:53:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:53:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:53:29,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809749828] [2020-12-22 08:53:29,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:53:29,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:53:29,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105062306] [2020-12-22 08:53:29,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:53:29,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:53:29,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:53:29,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:53:29,551 INFO L87 Difference]: Start difference. First operand 16528 states and 24650 transitions. Second operand 10 states. [2020-12-22 08:53:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:53:36,780 INFO L93 Difference]: Finished difference Result 49784 states and 74070 transitions. [2020-12-22 08:53:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:53:36,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 101 [2020-12-22 08:53:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:53:36,810 INFO L225 Difference]: With dead ends: 49784 [2020-12-22 08:53:36,810 INFO L226 Difference]: Without dead ends: 33417 [2020-12-22 08:53:36,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:53:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33417 states. [2020-12-22 08:53:40,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33417 to 16528. [2020-12-22 08:53:40,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16528 states. [2020-12-22 08:53:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16528 states to 16528 states and 24646 transitions. [2020-12-22 08:53:40,030 INFO L78 Accepts]: Start accepts. Automaton has 16528 states and 24646 transitions. Word has length 101 [2020-12-22 08:53:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:53:40,030 INFO L481 AbstractCegarLoop]: Abstraction has 16528 states and 24646 transitions. [2020-12-22 08:53:40,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:53:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 16528 states and 24646 transitions. [2020-12-22 08:53:40,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 08:53:40,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:53:40,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:53:40,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:53:40,032 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:53:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:53:40,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1017088267, now seen corresponding path program 1 times [2020-12-22 08:53:40,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:53:40,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352269921] [2020-12-22 08:53:40,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:53:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:53:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:53:40,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352269921] [2020-12-22 08:53:40,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:53:40,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 08:53:40,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434090476] [2020-12-22 08:53:40,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:53:40,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:53:40,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:53:40,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:53:40,352 INFO L87 Difference]: Start difference. First operand 16528 states and 24646 transitions. Second operand 12 states. [2020-12-22 08:53:41,068 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 08:53:42,016 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 08:55:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:55:04,461 INFO L93 Difference]: Finished difference Result 376777 states and 558996 transitions. [2020-12-22 08:55:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 08:55:04,462 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 102 [2020-12-22 08:55:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:55:05,317 INFO L225 Difference]: With dead ends: 376777 [2020-12-22 08:55:05,317 INFO L226 Difference]: Without dead ends: 360513 [2020-12-22 08:55:05,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=545, Invalid=1905, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 08:55:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360513 states. [2020-12-22 08:55:12,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360513 to 16540. [2020-12-22 08:55:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16540 states. [2020-12-22 08:55:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16540 states to 16540 states and 24656 transitions. [2020-12-22 08:55:12,773 INFO L78 Accepts]: Start accepts. Automaton has 16540 states and 24656 transitions. Word has length 102 [2020-12-22 08:55:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:55:12,774 INFO L481 AbstractCegarLoop]: Abstraction has 16540 states and 24656 transitions. [2020-12-22 08:55:12,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:55:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 16540 states and 24656 transitions. [2020-12-22 08:55:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 08:55:12,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:55:12,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:55:12,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:55:12,777 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:55:12,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:55:12,777 INFO L82 PathProgramCache]: Analyzing trace with hash -916891525, now seen corresponding path program 1 times [2020-12-22 08:55:12,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:55:12,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103771543] [2020-12-22 08:55:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:55:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:55:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:55:13,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103771543] [2020-12-22 08:55:13,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:55:13,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:55:13,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779464147] [2020-12-22 08:55:13,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:55:13,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:55:13,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:55:13,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:55:13,012 INFO L87 Difference]: Start difference. First operand 16540 states and 24656 transitions. Second operand 10 states. [2020-12-22 08:55:26,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:55:26,138 INFO L93 Difference]: Finished difference Result 57198 states and 85317 transitions. [2020-12-22 08:55:26,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 08:55:26,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2020-12-22 08:55:26,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:55:26,179 INFO L225 Difference]: With dead ends: 57198 [2020-12-22 08:55:26,179 INFO L226 Difference]: Without dead ends: 40964 [2020-12-22 08:55:26,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:55:26,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40964 states. [2020-12-22 08:55:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40964 to 16540. [2020-12-22 08:55:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16540 states. [2020-12-22 08:55:31,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16540 states to 16540 states and 24643 transitions. [2020-12-22 08:55:31,181 INFO L78 Accepts]: Start accepts. Automaton has 16540 states and 24643 transitions. Word has length 103 [2020-12-22 08:55:31,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:55:31,181 INFO L481 AbstractCegarLoop]: Abstraction has 16540 states and 24643 transitions. [2020-12-22 08:55:31,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:55:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 16540 states and 24643 transitions. [2020-12-22 08:55:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 08:55:31,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:55:31,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:55:31,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:55:31,184 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:55:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:55:31,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1323186080, now seen corresponding path program 1 times [2020-12-22 08:55:31,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:55:31,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927168101] [2020-12-22 08:55:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:55:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:55:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:55:34,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927168101] [2020-12-22 08:55:34,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:55:34,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-12-22 08:55:34,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252038839] [2020-12-22 08:55:34,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 08:55:34,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:55:34,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 08:55:34,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1435, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 08:55:34,659 INFO L87 Difference]: Start difference. First operand 16540 states and 24643 transitions. Second operand 40 states. [2020-12-22 08:55:35,443 WARN L197 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 155 [2020-12-22 08:55:36,122 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-22 08:55:36,332 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 08:55:36,592 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 08:55:36,838 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 08:55:37,096 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-12-22 08:55:37,371 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-12-22 08:55:37,670 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 08:55:37,971 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-22 08:55:38,298 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-12-22 08:55:39,113 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-12-22 08:55:39,515 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2020-12-22 08:55:40,021 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 105 [2020-12-22 08:55:40,561 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-12-22 08:55:41,236 WARN L197 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 125 [2020-12-22 08:55:41,951 WARN L197 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 146 [2020-12-22 08:55:42,849 WARN L197 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 164 [2020-12-22 08:55:43,947 WARN L197 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 174 [2020-12-22 08:55:45,181 WARN L197 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 203 DAG size of output: 182 [2020-12-22 08:55:46,346 WARN L197 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 189 [2020-12-22 08:55:47,673 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 221 DAG size of output: 199 [2020-12-22 08:55:48,136 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-12-22 08:55:48,589 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-12-22 08:55:48,912 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-22 08:55:49,286 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-12-22 08:55:49,584 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-22 08:55:49,867 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 08:55:50,161 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-12-22 08:55:50,367 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 08:55:50,655 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-12-22 08:55:51,151 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-12-22 08:55:51,914 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-12-22 08:55:52,294 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-22 08:55:52,710 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-12-22 08:55:53,306 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 08:55:54,018 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-22 08:55:54,701 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 08:55:55,568 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 08:55:55,983 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-12-22 08:55:57,100 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-12-22 08:55:57,628 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 08:55:58,320 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-12-22 08:55:58,765 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 08:56:08,374 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-12-22 08:56:10,499 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-12-22 08:56:13,900 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 08:56:40,453 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47