/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:06:43,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:06:43,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:06:43,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:06:43,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:06:43,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:06:43,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:06:43,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:06:43,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:06:43,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:06:43,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:06:43,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:06:43,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:06:43,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:06:43,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:06:43,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:06:43,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:06:43,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:06:43,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:06:43,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:06:43,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:06:43,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:06:43,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:06:43,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:06:43,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:06:43,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:06:43,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:06:43,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:06:43,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:06:43,435 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:06:43,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:06:43,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:06:43,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:06:43,442 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:06:43,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:06:43,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:06:43,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:06:43,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:06:43,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:06:43,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:06:43,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:06:43,446 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:06:43,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:06:43,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:06:43,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:06:43,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:06:43,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:06:43,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:06:43,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:06:43,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:06:43,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:06:43,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:06:43,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:06:43,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:06:43,450 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:06:43,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:06:43,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:06:43,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:06:43,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:06:43,908 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:06:43,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-12-22 09:06:43,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72fd40fd6/d53b12e1c7f942bc81265490fe9f279d/FLAG0d09b9765 [2020-12-22 09:06:44,911 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:06:44,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-12-22 09:06:44,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72fd40fd6/d53b12e1c7f942bc81265490fe9f279d/FLAG0d09b9765 [2020-12-22 09:06:45,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72fd40fd6/d53b12e1c7f942bc81265490fe9f279d [2020-12-22 09:06:45,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:06:45,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:06:45,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:06:45,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:06:45,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:06:45,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:06:45" (1/1) ... [2020-12-22 09:06:45,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c43c441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:45, skipping insertion in model container [2020-12-22 09:06:45,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:06:45" (1/1) ... [2020-12-22 09:06:45,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:06:45,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:06:46,033 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[26398,26411] [2020-12-22 09:06:46,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:06:46,291 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:06:46,552 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[26398,26411] [2020-12-22 09:06:46,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:06:46,681 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:06:46,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:46 WrapperNode [2020-12-22 09:06:46,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:06:46,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:06:46,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:06:46,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:06:46,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:46" (1/1) ... [2020-12-22 09:06:46,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:46" (1/1) ... [2020-12-22 09:06:46,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:06:46,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:06:46,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:06:46,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:06:46,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:46" (1/1) ... [2020-12-22 09:06:46,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:46" (1/1) ... [2020-12-22 09:06:46,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:46" (1/1) ... [2020-12-22 09:06:46,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:46" (1/1) ... [2020-12-22 09:06:46,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:46" (1/1) ... [2020-12-22 09:06:46,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:46" (1/1) ... [2020-12-22 09:06:46,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:46" (1/1) ... [2020-12-22 09:06:46,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:06:46,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:06:46,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:06:46,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:06:46,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:46" (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 09:06:47,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:06:47,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:06:47,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:06:47,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:06:49,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:06:49,256 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:06:49,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:06:49 BoogieIcfgContainer [2020-12-22 09:06:49,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:06:49,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:06:49,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:06:49,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:06:49,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:06:45" (1/3) ... [2020-12-22 09:06:49,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5338cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:06:49, skipping insertion in model container [2020-12-22 09:06:49,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:06:46" (2/3) ... [2020-12-22 09:06:49,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5338cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:06:49, skipping insertion in model container [2020-12-22 09:06:49,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:06:49" (3/3) ... [2020-12-22 09:06:49,276 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-12-22 09:06:49,284 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:06:49,290 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:06:49,314 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:06:49,368 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:06:49,369 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:06:49,369 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:06:49,369 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:06:49,369 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:06:49,369 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:06:49,369 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:06:49,370 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:06:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states. [2020-12-22 09:06:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-22 09:06:49,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:49,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:49,432 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:49,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:49,439 INFO L82 PathProgramCache]: Analyzing trace with hash 862105876, now seen corresponding path program 1 times [2020-12-22 09:06:49,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:49,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161842131] [2020-12-22 09:06:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:50,396 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 09:06:50,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161842131] [2020-12-22 09:06:50,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:50,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:50,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267231431] [2020-12-22 09:06:50,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:50,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:50,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:50,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:50,431 INFO L87 Difference]: Start difference. First operand 636 states. Second operand 3 states. [2020-12-22 09:06:50,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:50,726 INFO L93 Difference]: Finished difference Result 1167 states and 2055 transitions. [2020-12-22 09:06:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:50,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 246 [2020-12-22 09:06:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:50,761 INFO L225 Difference]: With dead ends: 1167 [2020-12-22 09:06:50,762 INFO L226 Difference]: Without dead ends: 972 [2020-12-22 09:06:50,768 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 09:06:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2020-12-22 09:06:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 970. [2020-12-22 09:06:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-12-22 09:06:50,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1533 transitions. [2020-12-22 09:06:50,908 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1533 transitions. Word has length 246 [2020-12-22 09:06:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:50,909 INFO L481 AbstractCegarLoop]: Abstraction has 970 states and 1533 transitions. [2020-12-22 09:06:50,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1533 transitions. [2020-12-22 09:06:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-22 09:06:50,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:50,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:50,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:06:50,922 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:50,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:50,923 INFO L82 PathProgramCache]: Analyzing trace with hash 883598316, now seen corresponding path program 1 times [2020-12-22 09:06:50,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:50,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087452881] [2020-12-22 09:06:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:51,838 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 09:06:51,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087452881] [2020-12-22 09:06:51,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:51,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:51,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095714565] [2020-12-22 09:06:51,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:51,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:51,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:51,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:51,845 INFO L87 Difference]: Start difference. First operand 970 states and 1533 transitions. Second operand 4 states. [2020-12-22 09:06:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:52,085 INFO L93 Difference]: Finished difference Result 2859 states and 4512 transitions. [2020-12-22 09:06:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:52,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 246 [2020-12-22 09:06:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:52,098 INFO L225 Difference]: With dead ends: 2859 [2020-12-22 09:06:52,098 INFO L226 Difference]: Without dead ends: 1900 [2020-12-22 09:06:52,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:06:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-12-22 09:06:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1898. [2020-12-22 09:06:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1898 states. [2020-12-22 09:06:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 2980 transitions. [2020-12-22 09:06:52,197 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 2980 transitions. Word has length 246 [2020-12-22 09:06:52,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:52,198 INFO L481 AbstractCegarLoop]: Abstraction has 1898 states and 2980 transitions. [2020-12-22 09:06:52,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 2980 transitions. [2020-12-22 09:06:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-12-22 09:06:52,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:52,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:52,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:06:52,206 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:52,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:52,207 INFO L82 PathProgramCache]: Analyzing trace with hash -233245184, now seen corresponding path program 1 times [2020-12-22 09:06:52,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:52,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383135823] [2020-12-22 09:06:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:52,500 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 09:06:52,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383135823] [2020-12-22 09:06:52,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:52,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:52,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458965317] [2020-12-22 09:06:52,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:52,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:52,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:52,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:52,507 INFO L87 Difference]: Start difference. First operand 1898 states and 2980 transitions. Second operand 3 states. [2020-12-22 09:06:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:52,734 INFO L93 Difference]: Finished difference Result 5497 states and 8596 transitions. [2020-12-22 09:06:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:52,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 248 [2020-12-22 09:06:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:52,756 INFO L225 Difference]: With dead ends: 5497 [2020-12-22 09:06:52,756 INFO L226 Difference]: Without dead ends: 3724 [2020-12-22 09:06:52,760 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 09:06:52,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3724 states. [2020-12-22 09:06:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3724 to 3722. [2020-12-22 09:06:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3722 states. [2020-12-22 09:06:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 5811 transitions. [2020-12-22 09:06:53,028 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 5811 transitions. Word has length 248 [2020-12-22 09:06:53,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:53,037 INFO L481 AbstractCegarLoop]: Abstraction has 3722 states and 5811 transitions. [2020-12-22 09:06:53,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 5811 transitions. [2020-12-22 09:06:53,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-12-22 09:06:53,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:53,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:53,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:06:53,047 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:53,048 INFO L82 PathProgramCache]: Analyzing trace with hash -170222651, now seen corresponding path program 1 times [2020-12-22 09:06:53,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:53,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590796307] [2020-12-22 09:06:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:53,202 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 09:06:53,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590796307] [2020-12-22 09:06:53,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:53,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:53,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8336338] [2020-12-22 09:06:53,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:53,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:53,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:53,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:53,211 INFO L87 Difference]: Start difference. First operand 3722 states and 5811 transitions. Second operand 3 states. [2020-12-22 09:06:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:53,747 INFO L93 Difference]: Finished difference Result 11099 states and 17317 transitions. [2020-12-22 09:06:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:53,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 248 [2020-12-22 09:06:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:53,795 INFO L225 Difference]: With dead ends: 11099 [2020-12-22 09:06:53,795 INFO L226 Difference]: Without dead ends: 7415 [2020-12-22 09:06:53,806 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 09:06:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7415 states. [2020-12-22 09:06:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7415 to 3741. [2020-12-22 09:06:54,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3741 states. [2020-12-22 09:06:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3741 states to 3741 states and 5839 transitions. [2020-12-22 09:06:54,156 INFO L78 Accepts]: Start accepts. Automaton has 3741 states and 5839 transitions. Word has length 248 [2020-12-22 09:06:54,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:54,156 INFO L481 AbstractCegarLoop]: Abstraction has 3741 states and 5839 transitions. [2020-12-22 09:06:54,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:54,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3741 states and 5839 transitions. [2020-12-22 09:06:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-12-22 09:06:54,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:54,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:54,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:06:54,166 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:54,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:54,166 INFO L82 PathProgramCache]: Analyzing trace with hash -992528260, now seen corresponding path program 1 times [2020-12-22 09:06:54,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:54,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614240374] [2020-12-22 09:06:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:54,318 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 09:06:54,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614240374] [2020-12-22 09:06:54,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:54,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:54,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991627513] [2020-12-22 09:06:54,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:54,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:54,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:54,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:54,321 INFO L87 Difference]: Start difference. First operand 3741 states and 5839 transitions. Second operand 3 states. [2020-12-22 09:06:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:54,904 INFO L93 Difference]: Finished difference Result 11118 states and 17338 transitions. [2020-12-22 09:06:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:54,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 249 [2020-12-22 09:06:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:54,959 INFO L225 Difference]: With dead ends: 11118 [2020-12-22 09:06:54,959 INFO L226 Difference]: Without dead ends: 7433 [2020-12-22 09:06:54,971 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 09:06:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7433 states. [2020-12-22 09:06:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7433 to 3759. [2020-12-22 09:06:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3759 states. [2020-12-22 09:06:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5860 transitions. [2020-12-22 09:06:55,420 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5860 transitions. Word has length 249 [2020-12-22 09:06:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:55,421 INFO L481 AbstractCegarLoop]: Abstraction has 3759 states and 5860 transitions. [2020-12-22 09:06:55,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5860 transitions. [2020-12-22 09:06:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-22 09:06:55,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:55,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:55,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:06:55,432 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:55,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:55,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1666542812, now seen corresponding path program 1 times [2020-12-22 09:06:55,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:55,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002743141] [2020-12-22 09:06:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:55,617 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 09:06:55,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002743141] [2020-12-22 09:06:55,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:55,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:55,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430484806] [2020-12-22 09:06:55,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:55,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:55,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:55,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:55,620 INFO L87 Difference]: Start difference. First operand 3759 states and 5860 transitions. Second operand 3 states. [2020-12-22 09:06:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:56,127 INFO L93 Difference]: Finished difference Result 8393 states and 13180 transitions. [2020-12-22 09:06:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:56,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 250 [2020-12-22 09:06:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:56,173 INFO L225 Difference]: With dead ends: 8393 [2020-12-22 09:06:56,173 INFO L226 Difference]: Without dead ends: 5453 [2020-12-22 09:06:56,180 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 09:06:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2020-12-22 09:06:56,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 4735. [2020-12-22 09:06:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4735 states. [2020-12-22 09:06:56,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 7482 transitions. [2020-12-22 09:06:56,631 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 7482 transitions. Word has length 250 [2020-12-22 09:06:56,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:56,631 INFO L481 AbstractCegarLoop]: Abstraction has 4735 states and 7482 transitions. [2020-12-22 09:06:56,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 7482 transitions. [2020-12-22 09:06:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-22 09:06:56,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:56,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:56,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:06:56,643 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:56,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:56,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1293164104, now seen corresponding path program 1 times [2020-12-22 09:06:56,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:56,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460480184] [2020-12-22 09:06:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:57,167 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 09:06:57,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460480184] [2020-12-22 09:06:57,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:57,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:06:57,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360944980] [2020-12-22 09:06:57,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:06:57,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:57,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:06:57,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:06:57,171 INFO L87 Difference]: Start difference. First operand 4735 states and 7482 transitions. Second operand 5 states. [2020-12-22 09:06:58,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:58,010 INFO L93 Difference]: Finished difference Result 13810 states and 21799 transitions. [2020-12-22 09:06:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:58,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 250 [2020-12-22 09:06:58,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:58,034 INFO L225 Difference]: With dead ends: 13810 [2020-12-22 09:06:58,034 INFO L226 Difference]: Without dead ends: 9118 [2020-12-22 09:06:58,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:06:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9118 states. [2020-12-22 09:06:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9118 to 9116. [2020-12-22 09:06:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9116 states. [2020-12-22 09:06:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9116 states to 9116 states and 14298 transitions. [2020-12-22 09:06:58,800 INFO L78 Accepts]: Start accepts. Automaton has 9116 states and 14298 transitions. Word has length 250 [2020-12-22 09:06:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:58,801 INFO L481 AbstractCegarLoop]: Abstraction has 9116 states and 14298 transitions. [2020-12-22 09:06:58,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:06:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 9116 states and 14298 transitions. [2020-12-22 09:06:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-12-22 09:06:58,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:58,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:58,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:06:58,817 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:58,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:58,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1846138798, now seen corresponding path program 1 times [2020-12-22 09:06:58,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:58,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375043402] [2020-12-22 09:06:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:59,389 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 09:06:59,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375043402] [2020-12-22 09:06:59,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:59,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:59,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849173336] [2020-12-22 09:06:59,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:59,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:59,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:59,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:59,392 INFO L87 Difference]: Start difference. First operand 9116 states and 14298 transitions. Second operand 4 states. [2020-12-22 09:07:00,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:00,862 INFO L93 Difference]: Finished difference Result 26764 states and 41934 transitions. [2020-12-22 09:07:00,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:00,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 252 [2020-12-22 09:07:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:00,928 INFO L225 Difference]: With dead ends: 26764 [2020-12-22 09:07:00,929 INFO L226 Difference]: Without dead ends: 17774 [2020-12-22 09:07:00,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:00,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17774 states. [2020-12-22 09:07:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17774 to 17772. [2020-12-22 09:07:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17772 states. [2020-12-22 09:07:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17772 states to 17772 states and 27700 transitions. [2020-12-22 09:07:02,577 INFO L78 Accepts]: Start accepts. Automaton has 17772 states and 27700 transitions. Word has length 252 [2020-12-22 09:07:02,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:02,577 INFO L481 AbstractCegarLoop]: Abstraction has 17772 states and 27700 transitions. [2020-12-22 09:07:02,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:07:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 17772 states and 27700 transitions. [2020-12-22 09:07:02,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-12-22 09:07:02,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:02,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:07:02,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:07:02,611 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:02,613 INFO L82 PathProgramCache]: Analyzing trace with hash -949156679, now seen corresponding path program 1 times [2020-12-22 09:07:02,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:02,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142524505] [2020-12-22 09:07:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:02,863 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 09:07:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142524505] [2020-12-22 09:07:02,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:02,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:02,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408857799] [2020-12-22 09:07:02,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:02,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:02,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:02,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:02,873 INFO L87 Difference]: Start difference. First operand 17772 states and 27700 transitions. Second operand 3 states. [2020-12-22 09:07:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:05,285 INFO L93 Difference]: Finished difference Result 52018 states and 80928 transitions. [2020-12-22 09:07:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:05,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-12-22 09:07:05,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:05,361 INFO L225 Difference]: With dead ends: 52018 [2020-12-22 09:07:05,361 INFO L226 Difference]: Without dead ends: 34760 [2020-12-22 09:07:05,390 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 09:07:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34760 states. [2020-12-22 09:07:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34760 to 34758. [2020-12-22 09:07:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34758 states. [2020-12-22 09:07:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34758 states to 34758 states and 53864 transitions. [2020-12-22 09:07:07,997 INFO L78 Accepts]: Start accepts. Automaton has 34758 states and 53864 transitions. Word has length 254 [2020-12-22 09:07:07,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:07,998 INFO L481 AbstractCegarLoop]: Abstraction has 34758 states and 53864 transitions. [2020-12-22 09:07:07,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 34758 states and 53864 transitions. [2020-12-22 09:07:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-12-22 09:07:08,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:08,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:07:08,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:07:08,036 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:08,037 INFO L82 PathProgramCache]: Analyzing trace with hash 263955006, now seen corresponding path program 1 times [2020-12-22 09:07:08,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:08,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273774937] [2020-12-22 09:07:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:08,144 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 09:07:08,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273774937] [2020-12-22 09:07:08,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:08,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:08,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207679075] [2020-12-22 09:07:08,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:08,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:08,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:08,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:08,146 INFO L87 Difference]: Start difference. First operand 34758 states and 53864 transitions. Second operand 3 states. [2020-12-22 09:07:11,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:11,302 INFO L93 Difference]: Finished difference Result 103784 states and 160794 transitions. [2020-12-22 09:07:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:11,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-12-22 09:07:11,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:11,436 INFO L225 Difference]: With dead ends: 103784 [2020-12-22 09:07:11,437 INFO L226 Difference]: Without dead ends: 69298 [2020-12-22 09:07:11,483 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 09:07:11,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69298 states. [2020-12-22 09:07:14,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69298 to 34872. [2020-12-22 09:07:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34872 states. [2020-12-22 09:07:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34872 states to 34872 states and 54032 transitions. [2020-12-22 09:07:14,212 INFO L78 Accepts]: Start accepts. Automaton has 34872 states and 54032 transitions. Word has length 254 [2020-12-22 09:07:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:14,212 INFO L481 AbstractCegarLoop]: Abstraction has 34872 states and 54032 transitions. [2020-12-22 09:07:14,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 34872 states and 54032 transitions. [2020-12-22 09:07:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-12-22 09:07:14,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:14,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:07:14,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:07:14,250 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:14,251 INFO L82 PathProgramCache]: Analyzing trace with hash -983300515, now seen corresponding path program 1 times [2020-12-22 09:07:14,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:14,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774320521] [2020-12-22 09:07:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:14,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774320521] [2020-12-22 09:07:14,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:14,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:14,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115454240] [2020-12-22 09:07:14,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:14,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:14,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:14,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:14,407 INFO L87 Difference]: Start difference. First operand 34872 states and 54032 transitions. Second operand 3 states. [2020-12-22 09:07:17,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:17,964 INFO L93 Difference]: Finished difference Result 103846 states and 160832 transitions. [2020-12-22 09:07:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:17,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-12-22 09:07:17,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:18,114 INFO L225 Difference]: With dead ends: 103846 [2020-12-22 09:07:18,114 INFO L226 Difference]: Without dead ends: 69394 [2020-12-22 09:07:18,185 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 09:07:18,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69394 states. [2020-12-22 09:07:21,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69394 to 34968. [2020-12-22 09:07:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34968 states. [2020-12-22 09:07:21,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34968 states to 34968 states and 54142 transitions. [2020-12-22 09:07:21,059 INFO L78 Accepts]: Start accepts. Automaton has 34968 states and 54142 transitions. Word has length 255 [2020-12-22 09:07:21,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:21,059 INFO L481 AbstractCegarLoop]: Abstraction has 34968 states and 54142 transitions. [2020-12-22 09:07:21,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:21,059 INFO L276 IsEmpty]: Start isEmpty. Operand 34968 states and 54142 transitions. [2020-12-22 09:07:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-22 09:07:21,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:21,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:07:21,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:07:21,079 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:21,079 INFO L82 PathProgramCache]: Analyzing trace with hash 992207840, now seen corresponding path program 1 times [2020-12-22 09:07:21,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:21,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717268555] [2020-12-22 09:07:21,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:21,219 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 09:07:21,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717268555] [2020-12-22 09:07:21,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:21,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:21,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390636416] [2020-12-22 09:07:21,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:21,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:21,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:21,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:21,221 INFO L87 Difference]: Start difference. First operand 34968 states and 54142 transitions. Second operand 3 states. [2020-12-22 09:07:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:24,397 INFO L93 Difference]: Finished difference Result 82260 states and 129016 transitions. [2020-12-22 09:07:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:24,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 256 [2020-12-22 09:07:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:24,481 INFO L225 Difference]: With dead ends: 82260 [2020-12-22 09:07:24,481 INFO L226 Difference]: Without dead ends: 53402 [2020-12-22 09:07:24,512 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 09:07:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53402 states. [2020-12-22 09:07:27,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53402 to 48280. [2020-12-22 09:07:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48280 states. [2020-12-22 09:07:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48280 states to 48280 states and 76078 transitions. [2020-12-22 09:07:27,844 INFO L78 Accepts]: Start accepts. Automaton has 48280 states and 76078 transitions. Word has length 256 [2020-12-22 09:07:27,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:27,845 INFO L481 AbstractCegarLoop]: Abstraction has 48280 states and 76078 transitions. [2020-12-22 09:07:27,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 48280 states and 76078 transitions. [2020-12-22 09:07:27,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-22 09:07:27,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:27,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:07:27,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:07:27,869 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:27,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1201082732, now seen corresponding path program 1 times [2020-12-22 09:07:27,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:27,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374948767] [2020-12-22 09:07:27,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:28,083 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 09:07:28,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374948767] [2020-12-22 09:07:28,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:28,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:07:28,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785564748] [2020-12-22 09:07:28,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:07:28,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:28,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:07:28,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:07:28,086 INFO L87 Difference]: Start difference. First operand 48280 states and 76078 transitions. Second operand 3 states. [2020-12-22 09:07:33,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:33,526 INFO L93 Difference]: Finished difference Result 136912 states and 215414 transitions. [2020-12-22 09:07:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:07:33,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 256 [2020-12-22 09:07:33,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:33,649 INFO L225 Difference]: With dead ends: 136912 [2020-12-22 09:07:33,650 INFO L226 Difference]: Without dead ends: 89534 [2020-12-22 09:07:33,699 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 09:07:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89534 states. [2020-12-22 09:07:39,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89534 to 89532. [2020-12-22 09:07:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89532 states. [2020-12-22 09:07:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89532 states to 89532 states and 140116 transitions. [2020-12-22 09:07:39,718 INFO L78 Accepts]: Start accepts. Automaton has 89532 states and 140116 transitions. Word has length 256 [2020-12-22 09:07:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:39,719 INFO L481 AbstractCegarLoop]: Abstraction has 89532 states and 140116 transitions. [2020-12-22 09:07:39,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:07:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 89532 states and 140116 transitions. [2020-12-22 09:07:39,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-22 09:07:39,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:39,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:07:39,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:07:39,972 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:39,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:39,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1045471375, now seen corresponding path program 1 times [2020-12-22 09:07:39,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:39,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762203413] [2020-12-22 09:07:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:40,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762203413] [2020-12-22 09:07:40,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:40,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:07:40,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635023755] [2020-12-22 09:07:40,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:07:40,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:40,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:07:40,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:40,430 INFO L87 Difference]: Start difference. First operand 89532 states and 140116 transitions. Second operand 5 states. [2020-12-22 09:07:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:51,190 INFO L93 Difference]: Finished difference Result 263657 states and 412396 transitions. [2020-12-22 09:07:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:51,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 256 [2020-12-22 09:07:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:51,673 INFO L225 Difference]: With dead ends: 263657 [2020-12-22 09:07:51,673 INFO L226 Difference]: Without dead ends: 174506 [2020-12-22 09:07:51,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174506 states. [2020-12-22 09:08:03,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174506 to 174504. [2020-12-22 09:08:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174504 states. [2020-12-22 09:08:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174504 states to 174504 states and 271191 transitions. [2020-12-22 09:08:04,318 INFO L78 Accepts]: Start accepts. Automaton has 174504 states and 271191 transitions. Word has length 256 [2020-12-22 09:08:04,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:04,318 INFO L481 AbstractCegarLoop]: Abstraction has 174504 states and 271191 transitions. [2020-12-22 09:08:04,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:08:04,318 INFO L276 IsEmpty]: Start isEmpty. Operand 174504 states and 271191 transitions. [2020-12-22 09:08:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-12-22 09:08:04,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:04,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:08:04,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:08:04,385 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:04,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:04,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1277544271, now seen corresponding path program 1 times [2020-12-22 09:08:04,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:04,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129666375] [2020-12-22 09:08:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:05,178 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 09:08:05,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129666375] [2020-12-22 09:08:05,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:05,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:08:05,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088564442] [2020-12-22 09:08:05,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:08:05,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:05,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:08:05,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:08:05,181 INFO L87 Difference]: Start difference. First operand 174504 states and 271191 transitions. Second operand 5 states. [2020-12-22 09:08:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:26,480 INFO L93 Difference]: Finished difference Result 504903 states and 783178 transitions. [2020-12-22 09:08:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:08:26,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 258 [2020-12-22 09:08:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:27,154 INFO L225 Difference]: With dead ends: 504903 [2020-12-22 09:08:27,155 INFO L226 Difference]: Without dead ends: 331006 [2020-12-22 09:08:27,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:08:27,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331006 states.