/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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:56:55,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:56:55,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:56:55,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:56:55,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:56:55,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:56:55,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:56:55,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:56:55,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:56:55,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:56:55,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:56:55,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:56:55,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:56:55,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:56:55,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:56:55,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:56:55,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:56:55,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:56:55,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:56:55,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:56:55,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:56:55,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:56:55,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:56:55,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:56:55,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:56:55,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:56:55,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:56:55,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:56:55,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:56:55,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:56:55,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:56:55,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:56:55,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:56:55,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:56:55,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:56:55,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:56:55,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:56:55,206 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:56:55,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:56:55,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:56:55,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:56:55,212 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:56:55,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:56:55,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:56:55,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:56:55,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:56:55,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:56:55,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:56:55,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:56:55,216 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:56:55,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:56:55,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:56:55,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:56:55,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:56:55,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:56:55,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:56:55,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:56:55,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:56:55,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:56:55,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:56:55,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:56:55,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:56:55,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:56:55,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:56:55,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:56:55,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:56:55,737 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:56:55,737 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:56:55,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:56:55,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ce70e0b/2471ef99309a4437bfb42369d5b03ead/FLAGcae25a780 [2020-12-22 09:56:56,940 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:56:56,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:56:56,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ce70e0b/2471ef99309a4437bfb42369d5b03ead/FLAGcae25a780 [2020-12-22 09:56:57,337 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ce70e0b/2471ef99309a4437bfb42369d5b03ead [2020-12-22 09:56:57,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:56:57,343 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:56:57,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:56:57,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:56:57,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:56:57,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:56:57" (1/1) ... [2020-12-22 09:56:57,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64604e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:57, skipping insertion in model container [2020-12-22 09:56:57,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:56:57" (1/1) ... [2020-12-22 09:56:57,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:56:57,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:56:57,919 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[11758,11771] [2020-12-22 09:56:58,027 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[18576,18589] [2020-12-22 09:56:59,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:56:59,023 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:56:59,151 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[11758,11771] [2020-12-22 09:56:59,171 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[18576,18589] [2020-12-22 09:56:59,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:56:59,840 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:56:59,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:59 WrapperNode [2020-12-22 09:56:59,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:56:59,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:56:59,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:56:59,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:56:59,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:59" (1/1) ... [2020-12-22 09:56:59,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:59" (1/1) ... [2020-12-22 09:57:00,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:57:00,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:57:00,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:57:00,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:57:00,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:59" (1/1) ... [2020-12-22 09:57:00,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:59" (1/1) ... [2020-12-22 09:57:00,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:59" (1/1) ... [2020-12-22 09:57:00,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:59" (1/1) ... [2020-12-22 09:57:00,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:59" (1/1) ... [2020-12-22 09:57:00,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:59" (1/1) ... [2020-12-22 09:57:00,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:59" (1/1) ... [2020-12-22 09:57:01,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:57:01,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:57:01,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:57:01,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:57:01,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:57:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:57:01,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:57:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:57:01,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:57:06,840 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:57:06,841 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:57:06,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:57:06 BoogieIcfgContainer [2020-12-22 09:57:06,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:57:06,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:57:06,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:57:06,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:57:06,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:56:57" (1/3) ... [2020-12-22 09:57:06,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307f6877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:57:06, skipping insertion in model container [2020-12-22 09:57:06,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:59" (2/3) ... [2020-12-22 09:57:06,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307f6877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:57:06, skipping insertion in model container [2020-12-22 09:57:06,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:57:06" (3/3) ... [2020-12-22 09:57:06,856 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:57:06,863 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:57:06,869 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:57:06,890 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:57:06,926 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:57:06,926 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:57:06,927 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:57:06,927 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:57:06,927 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:57:06,927 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:57:06,927 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:57:06,927 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:57:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-12-22 09:57:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:57:06,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:06,974 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] [2020-12-22 09:57:06,974 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:06,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2020-12-22 09:57:06,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:06,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606761682] [2020-12-22 09:57:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:07,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606761682] [2020-12-22 09:57:07,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:07,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:57:07,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507948347] [2020-12-22 09:57:07,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:57:07,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:07,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:57:07,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:57:07,300 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 2 states. [2020-12-22 09:57:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:07,395 INFO L93 Difference]: Finished difference Result 1781 states and 3376 transitions. [2020-12-22 09:57:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:57:07,397 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:57:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:07,422 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:57:07,422 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:57:07,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:57:07,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:57:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:57:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:57:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1591 transitions. [2020-12-22 09:57:07,556 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1591 transitions. Word has length 34 [2020-12-22 09:57:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:07,557 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1591 transitions. [2020-12-22 09:57:07,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:57:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1591 transitions. [2020-12-22 09:57:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:57:07,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:07,559 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] [2020-12-22 09:57:07,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:57:07,560 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:07,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2020-12-22 09:57:07,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:07,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650693263] [2020-12-22 09:57:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:07,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650693263] [2020-12-22 09:57:07,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:07,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:57:07,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580617697] [2020-12-22 09:57:07,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:57:07,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:07,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:57:07,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:57:07,762 INFO L87 Difference]: Start difference. First operand 844 states and 1591 transitions. Second operand 5 states. [2020-12-22 09:57:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:08,042 INFO L93 Difference]: Finished difference Result 901 states and 1679 transitions. [2020-12-22 09:57:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:57:08,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:57:08,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:08,049 INFO L225 Difference]: With dead ends: 901 [2020-12-22 09:57:08,049 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:57:08,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:57:08,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:57:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:57:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1560 transitions. [2020-12-22 09:57:08,081 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1560 transitions. Word has length 34 [2020-12-22 09:57:08,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:08,081 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1560 transitions. [2020-12-22 09:57:08,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:57:08,081 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1560 transitions. [2020-12-22 09:57:08,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 09:57:08,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:08,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:08,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:57:08,085 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:08,086 INFO L82 PathProgramCache]: Analyzing trace with hash -918859349, now seen corresponding path program 1 times [2020-12-22 09:57:08,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:08,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649498791] [2020-12-22 09:57:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:08,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649498791] [2020-12-22 09:57:08,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:08,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:08,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840976328] [2020-12-22 09:57:08,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:57:08,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:08,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:57:08,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:57:08,377 INFO L87 Difference]: Start difference. First operand 844 states and 1560 transitions. Second operand 4 states. [2020-12-22 09:57:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:19,935 INFO L93 Difference]: Finished difference Result 3099 states and 5869 transitions. [2020-12-22 09:57:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:57:19,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 09:57:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:19,951 INFO L225 Difference]: With dead ends: 3099 [2020-12-22 09:57:19,951 INFO L226 Difference]: Without dead ends: 2346 [2020-12-22 09:57:19,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:57:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2020-12-22 09:57:20,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2346. [2020-12-22 09:57:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2346 states. [2020-12-22 09:57:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3536 transitions. [2020-12-22 09:57:20,065 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3536 transitions. Word has length 61 [2020-12-22 09:57:20,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:20,065 INFO L481 AbstractCegarLoop]: Abstraction has 2346 states and 3536 transitions. [2020-12-22 09:57:20,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:57:20,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3536 transitions. [2020-12-22 09:57:20,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:57:20,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:20,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:20,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:57:20,069 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:20,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2020-12-22 09:57:20,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:20,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936623548] [2020-12-22 09:57:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:20,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936623548] [2020-12-22 09:57:20,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:20,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:20,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687966505] [2020-12-22 09:57:20,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:20,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:20,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:20,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:20,153 INFO L87 Difference]: Start difference. First operand 2346 states and 3536 transitions. Second operand 3 states. [2020-12-22 09:57:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:20,196 INFO L93 Difference]: Finished difference Result 2446 states and 3694 transitions. [2020-12-22 09:57:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:20,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:57:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:20,211 INFO L225 Difference]: With dead ends: 2446 [2020-12-22 09:57:20,211 INFO L226 Difference]: Without dead ends: 2393 [2020-12-22 09:57:20,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2020-12-22 09:57:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2391. [2020-12-22 09:57:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2391 states. [2020-12-22 09:57:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 3608 transitions. [2020-12-22 09:57:20,272 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 3608 transitions. Word has length 64 [2020-12-22 09:57:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:20,272 INFO L481 AbstractCegarLoop]: Abstraction has 2391 states and 3608 transitions. [2020-12-22 09:57:20,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 3608 transitions. [2020-12-22 09:57:20,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:57:20,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:20,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:20,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:57:20,275 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:20,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:20,276 INFO L82 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2020-12-22 09:57:20,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:20,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686642531] [2020-12-22 09:57:20,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:20,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686642531] [2020-12-22 09:57:20,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:20,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:20,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994238789] [2020-12-22 09:57:20,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:20,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:20,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:20,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:20,397 INFO L87 Difference]: Start difference. First operand 2391 states and 3608 transitions. Second operand 7 states. [2020-12-22 09:57:20,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:20,745 INFO L93 Difference]: Finished difference Result 3371 states and 5168 transitions. [2020-12-22 09:57:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:57:20,746 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:57:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:20,763 INFO L225 Difference]: With dead ends: 3371 [2020-12-22 09:57:20,763 INFO L226 Difference]: Without dead ends: 3273 [2020-12-22 09:57:20,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:57:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2020-12-22 09:57:20,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2487. [2020-12-22 09:57:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2487 states. [2020-12-22 09:57:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3759 transitions. [2020-12-22 09:57:20,851 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3759 transitions. Word has length 64 [2020-12-22 09:57:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:20,852 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 3759 transitions. [2020-12-22 09:57:20,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3759 transitions. [2020-12-22 09:57:20,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:20,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:20,854 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] [2020-12-22 09:57:20,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:57:20,854 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:20,855 INFO L82 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2020-12-22 09:57:20,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:20,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186789769] [2020-12-22 09:57:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:20,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186789769] [2020-12-22 09:57:20,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:20,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:20,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504797211] [2020-12-22 09:57:20,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:20,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:20,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:20,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:20,930 INFO L87 Difference]: Start difference. First operand 2487 states and 3759 transitions. Second operand 3 states. [2020-12-22 09:57:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:21,000 INFO L93 Difference]: Finished difference Result 2853 states and 4335 transitions. [2020-12-22 09:57:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:21,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:21,016 INFO L225 Difference]: With dead ends: 2853 [2020-12-22 09:57:21,017 INFO L226 Difference]: Without dead ends: 2659 [2020-12-22 09:57:21,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2020-12-22 09:57:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2653. [2020-12-22 09:57:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2653 states. [2020-12-22 09:57:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4013 transitions. [2020-12-22 09:57:21,104 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4013 transitions. Word has length 66 [2020-12-22 09:57:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:21,104 INFO L481 AbstractCegarLoop]: Abstraction has 2653 states and 4013 transitions. [2020-12-22 09:57:21,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4013 transitions. [2020-12-22 09:57:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:21,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:21,106 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] [2020-12-22 09:57:21,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:57:21,106 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:21,107 INFO L82 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2020-12-22 09:57:21,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:21,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126638359] [2020-12-22 09:57:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:21,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126638359] [2020-12-22 09:57:21,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:21,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:21,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046469287] [2020-12-22 09:57:21,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:21,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:21,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:21,368 INFO L87 Difference]: Start difference. First operand 2653 states and 4013 transitions. Second operand 7 states. [2020-12-22 09:57:21,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:21,632 INFO L93 Difference]: Finished difference Result 3015 states and 4575 transitions. [2020-12-22 09:57:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:21,633 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:57:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:21,647 INFO L225 Difference]: With dead ends: 3015 [2020-12-22 09:57:21,648 INFO L226 Difference]: Without dead ends: 2655 [2020-12-22 09:57:21,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:57:21,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2020-12-22 09:57:21,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2653. [2020-12-22 09:57:21,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2653 states. [2020-12-22 09:57:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4009 transitions. [2020-12-22 09:57:21,731 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4009 transitions. Word has length 66 [2020-12-22 09:57:21,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:21,732 INFO L481 AbstractCegarLoop]: Abstraction has 2653 states and 4009 transitions. [2020-12-22 09:57:21,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:21,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4009 transitions. [2020-12-22 09:57:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:21,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:21,733 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] [2020-12-22 09:57:21,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:57:21,734 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2020-12-22 09:57:21,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:21,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414930422] [2020-12-22 09:57:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:21,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414930422] [2020-12-22 09:57:21,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:21,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:21,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957954991] [2020-12-22 09:57:21,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:21,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:21,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:21,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:21,820 INFO L87 Difference]: Start difference. First operand 2653 states and 4009 transitions. Second operand 3 states. [2020-12-22 09:57:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:21,910 INFO L93 Difference]: Finished difference Result 3325 states and 5043 transitions. [2020-12-22 09:57:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:21,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:21,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:21,931 INFO L225 Difference]: With dead ends: 3325 [2020-12-22 09:57:21,931 INFO L226 Difference]: Without dead ends: 2965 [2020-12-22 09:57:21,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2020-12-22 09:57:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2020-12-22 09:57:22,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2963 states. [2020-12-22 09:57:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4477 transitions. [2020-12-22 09:57:22,063 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4477 transitions. Word has length 66 [2020-12-22 09:57:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:22,063 INFO L481 AbstractCegarLoop]: Abstraction has 2963 states and 4477 transitions. [2020-12-22 09:57:22,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4477 transitions. [2020-12-22 09:57:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:22,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:22,065 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] [2020-12-22 09:57:22,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:57:22,065 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:22,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:22,066 INFO L82 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2020-12-22 09:57:22,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:22,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965555349] [2020-12-22 09:57:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:22,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965555349] [2020-12-22 09:57:22,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:22,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:22,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746886402] [2020-12-22 09:57:22,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:22,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:22,144 INFO L87 Difference]: Start difference. First operand 2963 states and 4477 transitions. Second operand 3 states. [2020-12-22 09:57:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:22,262 INFO L93 Difference]: Finished difference Result 4207 states and 6367 transitions. [2020-12-22 09:57:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:22,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:22,282 INFO L225 Difference]: With dead ends: 4207 [2020-12-22 09:57:22,283 INFO L226 Difference]: Without dead ends: 3537 [2020-12-22 09:57:22,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:22,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2020-12-22 09:57:22,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 3535. [2020-12-22 09:57:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3535 states. [2020-12-22 09:57:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 5325 transitions. [2020-12-22 09:57:22,445 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 5325 transitions. Word has length 66 [2020-12-22 09:57:22,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:22,445 INFO L481 AbstractCegarLoop]: Abstraction has 3535 states and 5325 transitions. [2020-12-22 09:57:22,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:22,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 5325 transitions. [2020-12-22 09:57:22,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:22,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:22,451 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] [2020-12-22 09:57:22,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:57:22,451 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:22,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:22,452 INFO L82 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2020-12-22 09:57:22,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:22,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194361033] [2020-12-22 09:57:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:22,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194361033] [2020-12-22 09:57:22,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:22,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:22,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937505404] [2020-12-22 09:57:22,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:22,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:22,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:22,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:22,576 INFO L87 Difference]: Start difference. First operand 3535 states and 5325 transitions. Second operand 3 states. [2020-12-22 09:57:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:22,757 INFO L93 Difference]: Finished difference Result 5827 states and 8751 transitions. [2020-12-22 09:57:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:22,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:22,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:22,800 INFO L225 Difference]: With dead ends: 5827 [2020-12-22 09:57:22,801 INFO L226 Difference]: Without dead ends: 4585 [2020-12-22 09:57:22,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:22,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4585 states. [2020-12-22 09:57:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4585 to 4583. [2020-12-22 09:57:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4583 states. [2020-12-22 09:57:23,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 6845 transitions. [2020-12-22 09:57:23,054 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 6845 transitions. Word has length 66 [2020-12-22 09:57:23,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:23,054 INFO L481 AbstractCegarLoop]: Abstraction has 4583 states and 6845 transitions. [2020-12-22 09:57:23,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:23,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 6845 transitions. [2020-12-22 09:57:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:57:23,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:23,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:23,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:57:23,056 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:23,057 INFO L82 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2020-12-22 09:57:23,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:23,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41840929] [2020-12-22 09:57:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:23,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41840929] [2020-12-22 09:57:23,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:23,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:57:23,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269879027] [2020-12-22 09:57:23,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:57:23,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:23,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:57:23,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:57:23,169 INFO L87 Difference]: Start difference. First operand 4583 states and 6845 transitions. Second operand 5 states. [2020-12-22 09:57:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:23,577 INFO L93 Difference]: Finished difference Result 6309 states and 9347 transitions. [2020-12-22 09:57:23,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:23,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:57:23,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:23,593 INFO L225 Difference]: With dead ends: 6309 [2020-12-22 09:57:23,594 INFO L226 Difference]: Without dead ends: 6307 [2020-12-22 09:57:23,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:57:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2020-12-22 09:57:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 4679. [2020-12-22 09:57:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4679 states. [2020-12-22 09:57:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 6925 transitions. [2020-12-22 09:57:23,878 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 6925 transitions. Word has length 67 [2020-12-22 09:57:23,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:23,879 INFO L481 AbstractCegarLoop]: Abstraction has 4679 states and 6925 transitions. [2020-12-22 09:57:23,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:57:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 6925 transitions. [2020-12-22 09:57:23,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:57:23,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:23,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:23,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:57:23,880 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:23,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2020-12-22 09:57:23,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:23,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672449317] [2020-12-22 09:57:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:23,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672449317] [2020-12-22 09:57:23,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:23,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:23,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418740432] [2020-12-22 09:57:23,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:23,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:23,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:23,943 INFO L87 Difference]: Start difference. First operand 4679 states and 6925 transitions. Second operand 3 states. [2020-12-22 09:57:24,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:24,225 INFO L93 Difference]: Finished difference Result 7118 states and 10515 transitions. [2020-12-22 09:57:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:24,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:57:24,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:24,240 INFO L225 Difference]: With dead ends: 7118 [2020-12-22 09:57:24,240 INFO L226 Difference]: Without dead ends: 5771 [2020-12-22 09:57:24,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2020-12-22 09:57:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5769. [2020-12-22 09:57:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5769 states. [2020-12-22 09:57:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8479 transitions. [2020-12-22 09:57:24,698 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8479 transitions. Word has length 68 [2020-12-22 09:57:24,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:24,698 INFO L481 AbstractCegarLoop]: Abstraction has 5769 states and 8479 transitions. [2020-12-22 09:57:24,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:24,698 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8479 transitions. [2020-12-22 09:57:24,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:24,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:24,702 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:24,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:57:24,703 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:24,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:24,703 INFO L82 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2020-12-22 09:57:24,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:24,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947420861] [2020-12-22 09:57:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:57:24,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947420861] [2020-12-22 09:57:24,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:24,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:24,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645736011] [2020-12-22 09:57:24,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:24,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:24,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:24,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:24,884 INFO L87 Difference]: Start difference. First operand 5769 states and 8479 transitions. Second operand 7 states. [2020-12-22 09:57:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:26,317 INFO L93 Difference]: Finished difference Result 23845 states and 34581 transitions. [2020-12-22 09:57:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:26,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:26,369 INFO L225 Difference]: With dead ends: 23845 [2020-12-22 09:57:26,369 INFO L226 Difference]: Without dead ends: 20371 [2020-12-22 09:57:26,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2020-12-22 09:57:26,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2020-12-22 09:57:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2020-12-22 09:57:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13455 transitions. [2020-12-22 09:57:27,012 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13455 transitions. Word has length 94 [2020-12-22 09:57:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:27,012 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 13455 transitions. [2020-12-22 09:57:27,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13455 transitions. [2020-12-22 09:57:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:27,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:27,017 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:27,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:57:27,017 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:27,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:27,018 INFO L82 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2020-12-22 09:57:27,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:27,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469936257] [2020-12-22 09:57:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:57:27,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469936257] [2020-12-22 09:57:27,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:27,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:27,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763595429] [2020-12-22 09:57:27,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:27,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:27,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:27,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:27,150 INFO L87 Difference]: Start difference. First operand 9241 states and 13455 transitions. Second operand 7 states. [2020-12-22 09:57:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:28,431 INFO L93 Difference]: Finished difference Result 27317 states and 39557 transitions. [2020-12-22 09:57:28,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:28,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:28,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:28,494 INFO L225 Difference]: With dead ends: 27317 [2020-12-22 09:57:28,494 INFO L226 Difference]: Without dead ends: 23843 [2020-12-22 09:57:28,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:28,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2020-12-22 09:57:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2020-12-22 09:57:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14457 states. [2020-12-22 09:57:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 20879 transitions. [2020-12-22 09:57:29,473 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 20879 transitions. Word has length 94 [2020-12-22 09:57:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:29,474 INFO L481 AbstractCegarLoop]: Abstraction has 14457 states and 20879 transitions. [2020-12-22 09:57:29,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 20879 transitions. [2020-12-22 09:57:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:29,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:29,478 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:29,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:57:29,479 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:29,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:29,480 INFO L82 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2020-12-22 09:57:29,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:29,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647233953] [2020-12-22 09:57:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:57:29,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647233953] [2020-12-22 09:57:29,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:29,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:29,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540064127] [2020-12-22 09:57:29,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:29,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:29,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:29,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:29,606 INFO L87 Difference]: Start difference. First operand 14457 states and 20879 transitions. Second operand 7 states. [2020-12-22 09:57:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:31,084 INFO L93 Difference]: Finished difference Result 30789 states and 44533 transitions. [2020-12-22 09:57:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:31,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:31,152 INFO L225 Difference]: With dead ends: 30789 [2020-12-22 09:57:31,153 INFO L226 Difference]: Without dead ends: 27315 [2020-12-22 09:57:31,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2020-12-22 09:57:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2020-12-22 09:57:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17929 states. [2020-12-22 09:57:32,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25855 transitions. [2020-12-22 09:57:32,351 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25855 transitions. Word has length 94 [2020-12-22 09:57:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:32,352 INFO L481 AbstractCegarLoop]: Abstraction has 17929 states and 25855 transitions. [2020-12-22 09:57:32,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25855 transitions. [2020-12-22 09:57:32,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:32,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:32,357 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:32,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:57:32,358 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:32,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:32,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2020-12-22 09:57:32,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:32,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362154402] [2020-12-22 09:57:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:57:32,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362154402] [2020-12-22 09:57:32,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:32,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:32,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739324786] [2020-12-22 09:57:32,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:32,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:32,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:32,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:32,477 INFO L87 Difference]: Start difference. First operand 17929 states and 25855 transitions. Second operand 7 states. [2020-12-22 09:57:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:33,979 INFO L93 Difference]: Finished difference Result 34261 states and 49509 transitions. [2020-12-22 09:57:33,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:33,979 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:33,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:34,048 INFO L225 Difference]: With dead ends: 34261 [2020-12-22 09:57:34,048 INFO L226 Difference]: Without dead ends: 30787 [2020-12-22 09:57:34,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2020-12-22 09:57:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2020-12-22 09:57:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21401 states. [2020-12-22 09:57:35,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30831 transitions. [2020-12-22 09:57:35,326 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30831 transitions. Word has length 94 [2020-12-22 09:57:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:35,327 INFO L481 AbstractCegarLoop]: Abstraction has 21401 states and 30831 transitions. [2020-12-22 09:57:35,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30831 transitions. [2020-12-22 09:57:35,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:57:35,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:35,333 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:35,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:57:35,333 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:35,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:35,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2020-12-22 09:57:35,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:35,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246335097] [2020-12-22 09:57:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:35,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246335097] [2020-12-22 09:57:35,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:35,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:35,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321054983] [2020-12-22 09:57:35,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:35,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:35,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:35,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:35,406 INFO L87 Difference]: Start difference. First operand 21401 states and 30831 transitions. Second operand 3 states. [2020-12-22 09:57:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:36,333 INFO L93 Difference]: Finished difference Result 34810 states and 50228 transitions. [2020-12-22 09:57:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:36,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 09:57:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:36,364 INFO L225 Difference]: With dead ends: 34810 [2020-12-22 09:57:36,365 INFO L226 Difference]: Without dead ends: 15704 [2020-12-22 09:57:36,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:36,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15704 states. [2020-12-22 09:57:37,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15704 to 15702. [2020-12-22 09:57:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15702 states. [2020-12-22 09:57:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15702 states to 15702 states and 22673 transitions. [2020-12-22 09:57:37,271 INFO L78 Accepts]: Start accepts. Automaton has 15702 states and 22673 transitions. Word has length 96 [2020-12-22 09:57:37,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:37,271 INFO L481 AbstractCegarLoop]: Abstraction has 15702 states and 22673 transitions. [2020-12-22 09:57:37,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:37,271 INFO L276 IsEmpty]: Start isEmpty. Operand 15702 states and 22673 transitions. [2020-12-22 09:57:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:57:37,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:37,276 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:37,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:57:37,276 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:37,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:37,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2020-12-22 09:57:37,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:37,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213500617] [2020-12-22 09:57:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:57:37,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213500617] [2020-12-22 09:57:37,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:37,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:37,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938727550] [2020-12-22 09:57:37,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:37,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:37,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:37,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:37,394 INFO L87 Difference]: Start difference. First operand 15702 states and 22673 transitions. Second operand 7 states. [2020-12-22 09:57:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:39,142 INFO L93 Difference]: Finished difference Result 27874 states and 40279 transitions. [2020-12-22 09:57:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:39,142 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 09:57:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:39,179 INFO L225 Difference]: With dead ends: 27874 [2020-12-22 09:57:39,180 INFO L226 Difference]: Without dead ends: 25440 [2020-12-22 09:57:39,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25440 states. [2020-12-22 09:57:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25440 to 18134. [2020-12-22 09:57:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18134 states. [2020-12-22 09:57:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18134 states to 18134 states and 26161 transitions. [2020-12-22 09:57:40,447 INFO L78 Accepts]: Start accepts. Automaton has 18134 states and 26161 transitions. Word has length 96 [2020-12-22 09:57:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:40,448 INFO L481 AbstractCegarLoop]: Abstraction has 18134 states and 26161 transitions. [2020-12-22 09:57:40,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 18134 states and 26161 transitions. [2020-12-22 09:57:40,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:40,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:40,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:40,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:57:40,454 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:40,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:40,455 INFO L82 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2020-12-22 09:57:40,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:40,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869789598] [2020-12-22 09:57:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:40,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869789598] [2020-12-22 09:57:40,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:40,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:40,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574039366] [2020-12-22 09:57:40,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:40,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:40,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:40,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:40,520 INFO L87 Difference]: Start difference. First operand 18134 states and 26161 transitions. Second operand 3 states. [2020-12-22 09:57:41,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:41,037 INFO L93 Difference]: Finished difference Result 26042 states and 37499 transitions. [2020-12-22 09:57:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:41,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:41,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:41,049 INFO L225 Difference]: With dead ends: 26042 [2020-12-22 09:57:41,050 INFO L226 Difference]: Without dead ends: 10232 [2020-12-22 09:57:41,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10232 states. [2020-12-22 09:57:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10232 to 10230. [2020-12-22 09:57:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10230 states. [2020-12-22 09:57:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10230 states to 10230 states and 14721 transitions. [2020-12-22 09:57:41,706 INFO L78 Accepts]: Start accepts. Automaton has 10230 states and 14721 transitions. Word has length 97 [2020-12-22 09:57:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:41,706 INFO L481 AbstractCegarLoop]: Abstraction has 10230 states and 14721 transitions. [2020-12-22 09:57:41,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 10230 states and 14721 transitions. [2020-12-22 09:57:41,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:41,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:41,710 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:41,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:57:41,711 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:41,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2020-12-22 09:57:41,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:41,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653734224] [2020-12-22 09:57:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:41,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653734224] [2020-12-22 09:57:41,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:41,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:41,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551223666] [2020-12-22 09:57:41,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:41,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:41,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:41,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:41,787 INFO L87 Difference]: Start difference. First operand 10230 states and 14721 transitions. Second operand 3 states. [2020-12-22 09:57:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:42,162 INFO L93 Difference]: Finished difference Result 14186 states and 20339 transitions. [2020-12-22 09:57:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:42,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:42,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:42,172 INFO L225 Difference]: With dead ends: 14186 [2020-12-22 09:57:42,172 INFO L226 Difference]: Without dead ends: 6280 [2020-12-22 09:57:42,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2020-12-22 09:57:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6278. [2020-12-22 09:57:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2020-12-22 09:57:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9053 transitions. [2020-12-22 09:57:42,599 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9053 transitions. Word has length 97 [2020-12-22 09:57:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:42,600 INFO L481 AbstractCegarLoop]: Abstraction has 6278 states and 9053 transitions. [2020-12-22 09:57:42,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9053 transitions. [2020-12-22 09:57:42,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:42,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:42,602 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:42,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:57:42,603 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:42,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:42,603 INFO L82 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2020-12-22 09:57:42,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:42,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048501235] [2020-12-22 09:57:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:42,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048501235] [2020-12-22 09:57:42,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:42,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:42,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280873007] [2020-12-22 09:57:42,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:42,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:42,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:42,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:42,716 INFO L87 Difference]: Start difference. First operand 6278 states and 9053 transitions. Second operand 3 states. [2020-12-22 09:57:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:42,867 INFO L93 Difference]: Finished difference Result 8258 states and 11837 transitions. [2020-12-22 09:57:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:42,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:42,876 INFO L225 Difference]: With dead ends: 8258 [2020-12-22 09:57:42,876 INFO L226 Difference]: Without dead ends: 4304 [2020-12-22 09:57:42,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2020-12-22 09:57:43,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 4302. [2020-12-22 09:57:43,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4302 states. [2020-12-22 09:57:43,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6245 transitions. [2020-12-22 09:57:43,108 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6245 transitions. Word has length 97 [2020-12-22 09:57:43,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:43,109 INFO L481 AbstractCegarLoop]: Abstraction has 4302 states and 6245 transitions. [2020-12-22 09:57:43,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:43,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6245 transitions. [2020-12-22 09:57:43,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:43,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:43,111 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:43,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:57:43,111 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:43,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:43,112 INFO L82 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2020-12-22 09:57:43,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:43,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957207331] [2020-12-22 09:57:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:43,458 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-12-22 09:57:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:43,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957207331] [2020-12-22 09:57:43,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564145121] [2020-12-22 09:57:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:57:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:43,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:57:43,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:57:44,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:44,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:57:44,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763937879] [2020-12-22 09:57:44,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:57:44,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:44,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:57:44,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:57:44,137 INFO L87 Difference]: Start difference. First operand 4302 states and 6245 transitions. Second operand 16 states. [2020-12-22 09:57:46,114 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 09:57:46,320 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 09:57:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:48,216 INFO L93 Difference]: Finished difference Result 15373 states and 21264 transitions. [2020-12-22 09:57:48,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:57:48,219 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-12-22 09:57:48,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:48,260 INFO L225 Difference]: With dead ends: 15373 [2020-12-22 09:57:48,260 INFO L226 Difference]: Without dead ends: 13395 [2020-12-22 09:57:48,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 09:57:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13395 states. [2020-12-22 09:57:49,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13395 to 10024. [2020-12-22 09:57:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10024 states. [2020-12-22 09:57:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 13807 transitions. [2020-12-22 09:57:49,465 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 13807 transitions. Word has length 97 [2020-12-22 09:57:49,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:49,466 INFO L481 AbstractCegarLoop]: Abstraction has 10024 states and 13807 transitions. [2020-12-22 09:57:49,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 09:57:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 13807 transitions. [2020-12-22 09:57:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:57:49,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:49,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:49,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:57:49,684 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:49,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:49,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1231715697, now seen corresponding path program 1 times [2020-12-22 09:57:49,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:49,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082524966] [2020-12-22 09:57:49,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:49,944 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-12-22 09:57:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:50,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082524966] [2020-12-22 09:57:50,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061103155] [2020-12-22 09:57:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:57:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:50,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:57:50,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:50,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:57:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:50,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:50,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:57:50,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930747161] [2020-12-22 09:57:50,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:57:50,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:50,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:57:50,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:57:50,847 INFO L87 Difference]: Start difference. First operand 10024 states and 13807 transitions. Second operand 22 states. [2020-12-22 09:57:53,078 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 09:57:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:55,829 INFO L93 Difference]: Finished difference Result 40825 states and 54873 transitions. [2020-12-22 09:57:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:57:55,830 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 09:57:55,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:55,875 INFO L225 Difference]: With dead ends: 40825 [2020-12-22 09:57:55,876 INFO L226 Difference]: Without dead ends: 34322 [2020-12-22 09:57:55,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 09:57:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34322 states. [2020-12-22 09:57:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34322 to 22527. [2020-12-22 09:57:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22527 states. [2020-12-22 09:57:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22527 states to 22527 states and 30346 transitions. [2020-12-22 09:57:57,858 INFO L78 Accepts]: Start accepts. Automaton has 22527 states and 30346 transitions. Word has length 98 [2020-12-22 09:57:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:57,858 INFO L481 AbstractCegarLoop]: Abstraction has 22527 states and 30346 transitions. [2020-12-22 09:57:57,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:57:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 22527 states and 30346 transitions. [2020-12-22 09:57:57,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:57:57,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:57,865 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:58,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:57:58,079 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:58,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087855, now seen corresponding path program 1 times [2020-12-22 09:57:58,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:58,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011641942] [2020-12-22 09:57:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:58,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011641942] [2020-12-22 09:57:58,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122779659] [2020-12-22 09:57:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:57:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:58,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:57:58,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:58,714 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:57:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:59,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:59,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:57:59,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046543240] [2020-12-22 09:57:59,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:57:59,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:59,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:57:59,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:57:59,049 INFO L87 Difference]: Start difference. First operand 22527 states and 30346 transitions. Second operand 17 states. [2020-12-22 09:57:59,935 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:58:01,924 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:58:03,101 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:58:07,671 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:58:26,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:26,096 INFO L93 Difference]: Finished difference Result 217082 states and 288156 transitions. [2020-12-22 09:58:26,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:58:26,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 09:58:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:26,458 INFO L225 Difference]: With dead ends: 217082 [2020-12-22 09:58:26,458 INFO L226 Difference]: Without dead ends: 197525 [2020-12-22 09:58:26,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1236, Invalid=6596, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 09:58:26,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197525 states. [2020-12-22 09:58:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197525 to 112800. [2020-12-22 09:58:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112800 states. [2020-12-22 09:58:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112800 states to 112800 states and 147729 transitions. [2020-12-22 09:58:39,246 INFO L78 Accepts]: Start accepts. Automaton has 112800 states and 147729 transitions. Word has length 98 [2020-12-22 09:58:39,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:39,246 INFO L481 AbstractCegarLoop]: Abstraction has 112800 states and 147729 transitions. [2020-12-22 09:58:39,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:58:39,246 INFO L276 IsEmpty]: Start isEmpty. Operand 112800 states and 147729 transitions. [2020-12-22 09:58:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:39,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:39,252 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:39,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:58:39,453 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:39,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:39,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2130421773, now seen corresponding path program 1 times [2020-12-22 09:58:39,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:39,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431110415] [2020-12-22 09:58:39,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:58:39,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431110415] [2020-12-22 09:58:39,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:39,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:58:39,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154291725] [2020-12-22 09:58:39,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:58:39,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:58:39,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:58:39,583 INFO L87 Difference]: Start difference. First operand 112800 states and 147729 transitions. Second operand 6 states. [2020-12-22 09:58:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:50,551 INFO L93 Difference]: Finished difference Result 213245 states and 279510 transitions. [2020-12-22 09:58:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:58:50,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:58:50,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:50,707 INFO L225 Difference]: With dead ends: 213245 [2020-12-22 09:58:50,708 INFO L226 Difference]: Without dead ends: 102941 [2020-12-22 09:58:50,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:58:50,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102941 states. [2020-12-22 09:59:01,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102941 to 102941. [2020-12-22 09:59:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102941 states. [2020-12-22 09:59:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102941 states to 102941 states and 133968 transitions. [2020-12-22 09:59:01,886 INFO L78 Accepts]: Start accepts. Automaton has 102941 states and 133968 transitions. Word has length 98 [2020-12-22 09:59:01,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:01,886 INFO L481 AbstractCegarLoop]: Abstraction has 102941 states and 133968 transitions. [2020-12-22 09:59:01,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:01,886 INFO L276 IsEmpty]: Start isEmpty. Operand 102941 states and 133968 transitions. [2020-12-22 09:59:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:01,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:01,910 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:01,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:59:01,910 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:01,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:01,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1745709901, now seen corresponding path program 1 times [2020-12-22 09:59:01,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:01,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908664332] [2020-12-22 09:59:01,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:59:02,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908664332] [2020-12-22 09:59:02,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:02,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:02,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665319550] [2020-12-22 09:59:02,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:02,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:02,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:02,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:02,003 INFO L87 Difference]: Start difference. First operand 102941 states and 133968 transitions. Second operand 6 states. [2020-12-22 09:59:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:10,485 INFO L93 Difference]: Finished difference Result 176479 states and 229419 transitions. [2020-12-22 09:59:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:10,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:59:10,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:10,628 INFO L225 Difference]: With dead ends: 176479 [2020-12-22 09:59:10,628 INFO L226 Difference]: Without dead ends: 76200 [2020-12-22 09:59:10,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76200 states. [2020-12-22 09:59:19,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76200 to 76200. [2020-12-22 09:59:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76200 states. [2020-12-22 09:59:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76200 states to 76200 states and 97896 transitions. [2020-12-22 09:59:19,150 INFO L78 Accepts]: Start accepts. Automaton has 76200 states and 97896 transitions. Word has length 98 [2020-12-22 09:59:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:19,150 INFO L481 AbstractCegarLoop]: Abstraction has 76200 states and 97896 transitions. [2020-12-22 09:59:19,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 76200 states and 97896 transitions. [2020-12-22 09:59:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:19,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:19,153 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:19,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:59:19,153 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:19,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1530628851, now seen corresponding path program 1 times [2020-12-22 09:59:19,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:19,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271309422] [2020-12-22 09:59:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:59:19,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271309422] [2020-12-22 09:59:19,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:19,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:19,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543619223] [2020-12-22 09:59:19,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:19,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:19,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:19,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:19,232 INFO L87 Difference]: Start difference. First operand 76200 states and 97896 transitions. Second operand 6 states. [2020-12-22 09:59:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:26,065 INFO L93 Difference]: Finished difference Result 131990 states and 169560 transitions. [2020-12-22 09:59:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:26,066 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:59:26,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:26,125 INFO L225 Difference]: With dead ends: 131990 [2020-12-22 09:59:26,125 INFO L226 Difference]: Without dead ends: 58170 [2020-12-22 09:59:26,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58170 states. [2020-12-22 09:59:32,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58170 to 58170. [2020-12-22 09:59:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58170 states. [2020-12-22 09:59:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58170 states to 58170 states and 74590 transitions. [2020-12-22 09:59:32,617 INFO L78 Accepts]: Start accepts. Automaton has 58170 states and 74590 transitions. Word has length 98 [2020-12-22 09:59:32,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:32,617 INFO L481 AbstractCegarLoop]: Abstraction has 58170 states and 74590 transitions. [2020-12-22 09:59:32,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:32,617 INFO L276 IsEmpty]: Start isEmpty. Operand 58170 states and 74590 transitions. [2020-12-22 09:59:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 09:59:32,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:32,620 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:32,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:59:32,620 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:32,621 INFO L82 PathProgramCache]: Analyzing trace with hash -328972562, now seen corresponding path program 1 times [2020-12-22 09:59:32,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:32,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344586597] [2020-12-22 09:59:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:59:32,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344586597] [2020-12-22 09:59:32,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:32,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:32,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606288905] [2020-12-22 09:59:32,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:32,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:32,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:32,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:32,709 INFO L87 Difference]: Start difference. First operand 58170 states and 74590 transitions. Second operand 6 states. [2020-12-22 09:59:38,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:38,446 INFO L93 Difference]: Finished difference Result 101224 states and 129493 transitions. [2020-12-22 09:59:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:38,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 09:59:38,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:38,491 INFO L225 Difference]: With dead ends: 101224 [2020-12-22 09:59:38,492 INFO L226 Difference]: Without dead ends: 45436 [2020-12-22 09:59:38,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45436 states. [2020-12-22 09:59:43,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45436 to 45436. [2020-12-22 09:59:43,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45436 states. [2020-12-22 09:59:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45436 states to 45436 states and 57833 transitions. [2020-12-22 09:59:43,853 INFO L78 Accepts]: Start accepts. Automaton has 45436 states and 57833 transitions. Word has length 99 [2020-12-22 09:59:43,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:43,853 INFO L481 AbstractCegarLoop]: Abstraction has 45436 states and 57833 transitions. [2020-12-22 09:59:43,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:43,853 INFO L276 IsEmpty]: Start isEmpty. Operand 45436 states and 57833 transitions. [2020-12-22 09:59:43,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 09:59:43,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:43,856 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:43,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 09:59:43,856 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:43,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:43,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1888515992, now seen corresponding path program 1 times [2020-12-22 09:59:43,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:43,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517753736] [2020-12-22 09:59:43,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:44,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517753736] [2020-12-22 09:59:44,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210528574] [2020-12-22 09:59:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:59:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:44,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:59:44,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:59:44,663 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:59:44,974 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-12-22 09:59:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:45,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:59:45,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-22 09:59:45,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351023778] [2020-12-22 09:59:45,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 09:59:45,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:45,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 09:59:45,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 09:59:45,645 INFO L87 Difference]: Start difference. First operand 45436 states and 57833 transitions. Second operand 20 states. [2020-12-22 09:59:46,747 WARN L197 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 09:59:47,260 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 09:59:48,076 WARN L197 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 09:59:48,952 WARN L197 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-12-22 09:59:49,685 WARN L197 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:59:50,546 WARN L197 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:59:51,423 WARN L197 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:59:52,021 WARN L197 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-22 09:59:52,792 WARN L197 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:59:53,517 WARN L197 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-12-22 09:59:54,518 WARN L197 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:59:55,319 WARN L197 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:59:56,400 WARN L197 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:59:57,281 WARN L197 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:59:58,058 WARN L197 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:59:59,362 WARN L197 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:00:03,393 WARN L197 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:00:04,525 WARN L197 SmtUtils]: Spent 985.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-12-22 10:00:05,531 WARN L197 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:06,207 WARN L197 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:00:07,404 WARN L197 SmtUtils]: Spent 972.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 10:00:07,997 WARN L197 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:08,709 WARN L197 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 10:00:09,329 WARN L197 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:10,077 WARN L197 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 10:00:10,589 WARN L197 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:11,742 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-12-22 10:00:12,704 WARN L197 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:13,413 WARN L197 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-22 10:00:13,946 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:00:15,177 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:15,630 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 10:00:16,508 WARN L197 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:16,925 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:00:17,349 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:21,017 WARN L197 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-12-22 10:00:22,650 WARN L197 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-12-22 10:00:23,723 WARN L197 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:00:24,325 WARN L197 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:24,869 WARN L197 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:00:25,700 WARN L197 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-22 10:00:26,253 WARN L197 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:26,895 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:00:27,288 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 10:00:27,874 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:00:28,220 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:00:38,395 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-12-22 10:00:39,036 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 10:00:39,361 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 10:00:40,491 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 10:00:40,822 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 10:00:43,085 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 10:00:43,653 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 71