/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_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:08:28,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:08:28,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:08:28,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:08:28,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:08:28,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:08:28,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:08:28,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:08:28,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:08:28,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:08:28,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:08:28,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:08:28,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:08:28,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:08:28,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:08:28,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:08:28,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:08:28,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:08:28,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:08:28,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:08:28,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:08:28,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:08:28,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:08:28,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:08:28,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 08:08:28,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 08:08:28,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 08:08:28,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 08:08:28,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 08:08:28,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 08:08:28,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:08:28,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:08:28,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:08:28,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:08:28,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:08:28,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:08:28,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:08:28,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:08:28,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:08:28,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:08:28,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:08:28,267 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:08:28,323 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:08:28,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:08:28,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:08:28,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:08:28,329 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:08:28,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:08:28,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:08:28,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:08:28,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:08:28,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:08:28,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:08:28,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:08:28,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:08:28,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:08:28,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:08:28,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:08:28,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:08:28,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:08:28,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:08:28,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:08:28,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:08:28,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:08:28,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:08:28,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:08:28,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:08:28,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:08:28,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:08:28,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:08:28,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:08:28,799 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:08:28,800 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:08:28,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:08:28,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed4896327/257ccfbc28cc41d4bfe086c55215408a/FLAG5a068d8d8 [2020-12-22 08:08:29,511 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:08:29,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:08:29,527 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed4896327/257ccfbc28cc41d4bfe086c55215408a/FLAG5a068d8d8 [2020-12-22 08:08:29,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed4896327/257ccfbc28cc41d4bfe086c55215408a [2020-12-22 08:08:29,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:08:29,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:08:29,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:08:29,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:08:29,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:08:29,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:08:29" (1/1) ... [2020-12-22 08:08:29,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed949c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:29, skipping insertion in model container [2020-12-22 08:08:29,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:08:29" (1/1) ... [2020-12-22 08:08:29,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:08:29,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:08:30,213 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_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12582,12595] [2020-12-22 08:08:30,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:08:30,332 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:08:30,453 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_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12582,12595] [2020-12-22 08:08:30,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:08:30,521 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:08:30,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:30 WrapperNode [2020-12-22 08:08:30,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:08:30,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:08:30,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:08:30,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:08:30,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:30" (1/1) ... [2020-12-22 08:08:30,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:30" (1/1) ... [2020-12-22 08:08:30,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:08:30,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:08:30,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:08:30,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:08:30,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:30" (1/1) ... [2020-12-22 08:08:30,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:30" (1/1) ... [2020-12-22 08:08:30,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:30" (1/1) ... [2020-12-22 08:08:30,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:30" (1/1) ... [2020-12-22 08:08:30,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:30" (1/1) ... [2020-12-22 08:08:30,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:30" (1/1) ... [2020-12-22 08:08:30,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:30" (1/1) ... [2020-12-22 08:08:30,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:08:30,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:08:30,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:08:30,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:08:30,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:08:30,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:08:30,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:08:30,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:08:30,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:08:32,314 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:08:32,314 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:08:32,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:08:32 BoogieIcfgContainer [2020-12-22 08:08:32,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:08:32,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:08:32,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:08:32,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:08:32,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:08:29" (1/3) ... [2020-12-22 08:08:32,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f08061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:08:32, skipping insertion in model container [2020-12-22 08:08:32,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:08:30" (2/3) ... [2020-12-22 08:08:32,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f08061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:08:32, skipping insertion in model container [2020-12-22 08:08:32,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:08:32" (3/3) ... [2020-12-22 08:08:32,325 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:08:32,331 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:08:32,337 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:08:32,358 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:08:32,387 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:08:32,387 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:08:32,387 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:08:32,388 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:08:32,388 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:08:32,388 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:08:32,388 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:08:32,388 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:08:32,409 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states. [2020-12-22 08:08:32,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 08:08:32,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:32,426 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] [2020-12-22 08:08:32,427 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:32,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:32,433 INFO L82 PathProgramCache]: Analyzing trace with hash 430105228, now seen corresponding path program 1 times [2020-12-22 08:08:32,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:32,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081959688] [2020-12-22 08:08:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:32,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081959688] [2020-12-22 08:08:32,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:32,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:32,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488669556] [2020-12-22 08:08:32,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:32,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:32,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:32,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:32,986 INFO L87 Difference]: Start difference. First operand 326 states. Second operand 3 states. [2020-12-22 08:08:33,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:33,171 INFO L93 Difference]: Finished difference Result 589 states and 1021 transitions. [2020-12-22 08:08:33,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:33,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 08:08:33,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:33,211 INFO L225 Difference]: With dead ends: 589 [2020-12-22 08:08:33,211 INFO L226 Difference]: Without dead ends: 446 [2020-12-22 08:08:33,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:33,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-12-22 08:08:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 443. [2020-12-22 08:08:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-22 08:08:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 734 transitions. [2020-12-22 08:08:33,302 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 734 transitions. Word has length 110 [2020-12-22 08:08:33,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:33,303 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 734 transitions. [2020-12-22 08:08:33,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:33,303 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 734 transitions. [2020-12-22 08:08:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 08:08:33,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:33,308 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] [2020-12-22 08:08:33,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:08:33,309 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:33,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:33,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1228540371, now seen corresponding path program 1 times [2020-12-22 08:08:33,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:33,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022943649] [2020-12-22 08:08:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:33,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022943649] [2020-12-22 08:08:33,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:33,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:33,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850860153] [2020-12-22 08:08:33,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:33,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:33,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:33,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:33,571 INFO L87 Difference]: Start difference. First operand 443 states and 734 transitions. Second operand 3 states. [2020-12-22 08:08:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:33,680 INFO L93 Difference]: Finished difference Result 933 states and 1550 transitions. [2020-12-22 08:08:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:33,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 08:08:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:33,689 INFO L225 Difference]: With dead ends: 933 [2020-12-22 08:08:33,689 INFO L226 Difference]: Without dead ends: 679 [2020-12-22 08:08:33,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:33,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-12-22 08:08:33,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 675. [2020-12-22 08:08:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2020-12-22 08:08:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1118 transitions. [2020-12-22 08:08:33,776 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1118 transitions. Word has length 113 [2020-12-22 08:08:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:33,780 INFO L481 AbstractCegarLoop]: Abstraction has 675 states and 1118 transitions. [2020-12-22 08:08:33,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1118 transitions. [2020-12-22 08:08:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 08:08:33,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:33,794 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] [2020-12-22 08:08:33,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:08:33,794 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1403707664, now seen corresponding path program 1 times [2020-12-22 08:08:33,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:33,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723645921] [2020-12-22 08:08:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:34,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723645921] [2020-12-22 08:08:34,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:34,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:34,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186105681] [2020-12-22 08:08:34,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:34,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:34,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:34,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:34,052 INFO L87 Difference]: Start difference. First operand 675 states and 1118 transitions. Second operand 3 states. [2020-12-22 08:08:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:34,139 INFO L93 Difference]: Finished difference Result 1611 states and 2668 transitions. [2020-12-22 08:08:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:34,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-12-22 08:08:34,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:34,148 INFO L225 Difference]: With dead ends: 1611 [2020-12-22 08:08:34,148 INFO L226 Difference]: Without dead ends: 1125 [2020-12-22 08:08:34,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:34,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2020-12-22 08:08:34,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1119. [2020-12-22 08:08:34,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1119 states. [2020-12-22 08:08:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1846 transitions. [2020-12-22 08:08:34,213 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1846 transitions. Word has length 116 [2020-12-22 08:08:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:34,223 INFO L481 AbstractCegarLoop]: Abstraction has 1119 states and 1846 transitions. [2020-12-22 08:08:34,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1846 transitions. [2020-12-22 08:08:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 08:08:34,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:34,229 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] [2020-12-22 08:08:34,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:08:34,230 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:34,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1658128561, now seen corresponding path program 1 times [2020-12-22 08:08:34,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:34,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536416386] [2020-12-22 08:08:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:34,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536416386] [2020-12-22 08:08:34,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:34,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:34,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555530495] [2020-12-22 08:08:34,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:34,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:34,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:34,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:34,461 INFO L87 Difference]: Start difference. First operand 1119 states and 1846 transitions. Second operand 3 states. [2020-12-22 08:08:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:34,610 INFO L93 Difference]: Finished difference Result 2907 states and 4784 transitions. [2020-12-22 08:08:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:34,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2020-12-22 08:08:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:34,622 INFO L225 Difference]: With dead ends: 2907 [2020-12-22 08:08:34,622 INFO L226 Difference]: Without dead ends: 1977 [2020-12-22 08:08:34,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:34,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2020-12-22 08:08:34,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1967. [2020-12-22 08:08:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1967 states. [2020-12-22 08:08:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 3222 transitions. [2020-12-22 08:08:34,743 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 3222 transitions. Word has length 119 [2020-12-22 08:08:34,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:34,744 INFO L481 AbstractCegarLoop]: Abstraction has 1967 states and 3222 transitions. [2020-12-22 08:08:34,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 3222 transitions. [2020-12-22 08:08:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 08:08:34,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:34,749 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] [2020-12-22 08:08:34,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:08:34,750 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:34,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:34,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1735235476, now seen corresponding path program 1 times [2020-12-22 08:08:34,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:34,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065278713] [2020-12-22 08:08:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:34,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065278713] [2020-12-22 08:08:34,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:34,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:08:34,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830297098] [2020-12-22 08:08:34,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:08:34,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:34,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:08:34,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:08:34,966 INFO L87 Difference]: Start difference. First operand 1967 states and 3222 transitions. Second operand 6 states. [2020-12-22 08:08:35,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:35,664 INFO L93 Difference]: Finished difference Result 8371 states and 13812 transitions. [2020-12-22 08:08:35,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:08:35,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2020-12-22 08:08:35,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:35,705 INFO L225 Difference]: With dead ends: 8371 [2020-12-22 08:08:35,705 INFO L226 Difference]: Without dead ends: 6593 [2020-12-22 08:08:35,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:08:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2020-12-22 08:08:36,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 4691. [2020-12-22 08:08:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4691 states. [2020-12-22 08:08:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 7712 transitions. [2020-12-22 08:08:36,090 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 7712 transitions. Word has length 122 [2020-12-22 08:08:36,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:36,091 INFO L481 AbstractCegarLoop]: Abstraction has 4691 states and 7712 transitions. [2020-12-22 08:08:36,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:08:36,091 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 7712 transitions. [2020-12-22 08:08:36,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 08:08:36,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:36,095 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] [2020-12-22 08:08:36,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:08:36,096 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:36,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:36,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2109337106, now seen corresponding path program 1 times [2020-12-22 08:08:36,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:36,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104150687] [2020-12-22 08:08:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:36,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104150687] [2020-12-22 08:08:36,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:36,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:08:36,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750400129] [2020-12-22 08:08:36,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:08:36,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:36,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:08:36,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:08:36,237 INFO L87 Difference]: Start difference. First operand 4691 states and 7712 transitions. Second operand 4 states. [2020-12-22 08:08:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:36,956 INFO L93 Difference]: Finished difference Result 11831 states and 19533 transitions. [2020-12-22 08:08:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:36,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-12-22 08:08:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:37,002 INFO L225 Difference]: With dead ends: 11831 [2020-12-22 08:08:37,002 INFO L226 Difference]: Without dead ends: 7329 [2020-12-22 08:08:37,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:08:37,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7329 states. [2020-12-22 08:08:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7329 to 6819. [2020-12-22 08:08:37,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6819 states. [2020-12-22 08:08:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6819 states to 6819 states and 11232 transitions. [2020-12-22 08:08:37,580 INFO L78 Accepts]: Start accepts. Automaton has 6819 states and 11232 transitions. Word has length 123 [2020-12-22 08:08:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:37,581 INFO L481 AbstractCegarLoop]: Abstraction has 6819 states and 11232 transitions. [2020-12-22 08:08:37,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:08:37,581 INFO L276 IsEmpty]: Start isEmpty. Operand 6819 states and 11232 transitions. [2020-12-22 08:08:37,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 08:08:37,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:37,586 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] [2020-12-22 08:08:37,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:08:37,587 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1027444837, now seen corresponding path program 1 times [2020-12-22 08:08:37,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:37,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797455884] [2020-12-22 08:08:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:37,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797455884] [2020-12-22 08:08:37,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:37,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:08:37,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517813790] [2020-12-22 08:08:37,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:08:37,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:37,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:08:37,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:08:37,788 INFO L87 Difference]: Start difference. First operand 6819 states and 11232 transitions. Second operand 4 states. [2020-12-22 08:08:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:38,628 INFO L93 Difference]: Finished difference Result 17842 states and 29452 transitions. [2020-12-22 08:08:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:38,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-12-22 08:08:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:38,701 INFO L225 Difference]: With dead ends: 17842 [2020-12-22 08:08:38,701 INFO L226 Difference]: Without dead ends: 11212 [2020-12-22 08:08:38,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:08:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11212 states. [2020-12-22 08:08:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11212 to 9771. [2020-12-22 08:08:39,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9771 states. [2020-12-22 08:08:39,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9771 states to 9771 states and 16083 transitions. [2020-12-22 08:08:39,489 INFO L78 Accepts]: Start accepts. Automaton has 9771 states and 16083 transitions. Word has length 124 [2020-12-22 08:08:39,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:39,489 INFO L481 AbstractCegarLoop]: Abstraction has 9771 states and 16083 transitions. [2020-12-22 08:08:39,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:08:39,489 INFO L276 IsEmpty]: Start isEmpty. Operand 9771 states and 16083 transitions. [2020-12-22 08:08:39,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:08:39,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:39,496 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] [2020-12-22 08:08:39,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:08:39,496 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:39,497 INFO L82 PathProgramCache]: Analyzing trace with hash -275676370, now seen corresponding path program 1 times [2020-12-22 08:08:39,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:39,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249486182] [2020-12-22 08:08:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:39,617 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 08:08:39,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249486182] [2020-12-22 08:08:39,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:39,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:39,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113721300] [2020-12-22 08:08:39,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:39,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:39,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:39,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:39,619 INFO L87 Difference]: Start difference. First operand 9771 states and 16083 transitions. Second operand 3 states. [2020-12-22 08:08:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:40,499 INFO L93 Difference]: Finished difference Result 19632 states and 32392 transitions. [2020-12-22 08:08:40,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:40,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 08:08:40,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:40,538 INFO L225 Difference]: With dead ends: 19632 [2020-12-22 08:08:40,538 INFO L226 Difference]: Without dead ends: 14134 [2020-12-22 08:08:40,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:40,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14134 states. [2020-12-22 08:08:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14134 to 14132. [2020-12-22 08:08:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14132 states. [2020-12-22 08:08:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14132 states to 14132 states and 23224 transitions. [2020-12-22 08:08:41,494 INFO L78 Accepts]: Start accepts. Automaton has 14132 states and 23224 transitions. Word has length 125 [2020-12-22 08:08:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:41,495 INFO L481 AbstractCegarLoop]: Abstraction has 14132 states and 23224 transitions. [2020-12-22 08:08:41,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 14132 states and 23224 transitions. [2020-12-22 08:08:41,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:08:41,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:41,499 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] [2020-12-22 08:08:41,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:08:41,499 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:41,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:41,500 INFO L82 PathProgramCache]: Analyzing trace with hash 15369622, now seen corresponding path program 1 times [2020-12-22 08:08:41,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:41,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323536701] [2020-12-22 08:08:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:41,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323536701] [2020-12-22 08:08:41,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:41,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:41,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547171850] [2020-12-22 08:08:41,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:41,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:41,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:41,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:41,632 INFO L87 Difference]: Start difference. First operand 14132 states and 23224 transitions. Second operand 3 states. [2020-12-22 08:08:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:42,767 INFO L93 Difference]: Finished difference Result 27858 states and 45917 transitions. [2020-12-22 08:08:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:42,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 08:08:42,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:42,822 INFO L225 Difference]: With dead ends: 27858 [2020-12-22 08:08:42,822 INFO L226 Difference]: Without dead ends: 20148 [2020-12-22 08:08:42,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20148 states. [2020-12-22 08:08:44,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20148 to 20146. [2020-12-22 08:08:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20146 states. [2020-12-22 08:08:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20146 states to 20146 states and 33054 transitions. [2020-12-22 08:08:44,253 INFO L78 Accepts]: Start accepts. Automaton has 20146 states and 33054 transitions. Word has length 125 [2020-12-22 08:08:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:44,254 INFO L481 AbstractCegarLoop]: Abstraction has 20146 states and 33054 transitions. [2020-12-22 08:08:44,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 20146 states and 33054 transitions. [2020-12-22 08:08:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:08:44,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:44,258 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] [2020-12-22 08:08:44,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:08:44,259 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:44,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:44,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1843964843, now seen corresponding path program 1 times [2020-12-22 08:08:44,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:44,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374669985] [2020-12-22 08:08:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:44,396 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 08:08:44,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374669985] [2020-12-22 08:08:44,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:44,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:08:44,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131109658] [2020-12-22 08:08:44,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:08:44,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:44,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:08:44,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:08:44,399 INFO L87 Difference]: Start difference. First operand 20146 states and 33054 transitions. Second operand 4 states. [2020-12-22 08:08:46,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:46,521 INFO L93 Difference]: Finished difference Result 63048 states and 103778 transitions. [2020-12-22 08:08:46,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:46,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-12-22 08:08:46,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:46,642 INFO L225 Difference]: With dead ends: 63048 [2020-12-22 08:08:46,642 INFO L226 Difference]: Without dead ends: 43510 [2020-12-22 08:08:46,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:08:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43510 states. [2020-12-22 08:08:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43510 to 31766. [2020-12-22 08:08:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31766 states. [2020-12-22 08:08:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31766 states to 31766 states and 52060 transitions. [2020-12-22 08:08:48,478 INFO L78 Accepts]: Start accepts. Automaton has 31766 states and 52060 transitions. Word has length 125 [2020-12-22 08:08:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:48,479 INFO L481 AbstractCegarLoop]: Abstraction has 31766 states and 52060 transitions. [2020-12-22 08:08:48,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:08:48,479 INFO L276 IsEmpty]: Start isEmpty. Operand 31766 states and 52060 transitions. [2020-12-22 08:08:48,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:08:48,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:48,482 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] [2020-12-22 08:08:48,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:08:48,483 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:48,483 INFO L82 PathProgramCache]: Analyzing trace with hash -815921210, now seen corresponding path program 1 times [2020-12-22 08:08:48,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:48,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119423235] [2020-12-22 08:08:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:48,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119423235] [2020-12-22 08:08:48,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:48,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:48,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612702200] [2020-12-22 08:08:48,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:48,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:48,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:48,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:48,567 INFO L87 Difference]: Start difference. First operand 31766 states and 52060 transitions. Second operand 3 states. [2020-12-22 08:08:51,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:51,580 INFO L93 Difference]: Finished difference Result 70396 states and 115732 transitions. [2020-12-22 08:08:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:51,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 08:08:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:51,683 INFO L225 Difference]: With dead ends: 70396 [2020-12-22 08:08:51,684 INFO L226 Difference]: Without dead ends: 47781 [2020-12-22 08:08:51,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:51,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47781 states. [2020-12-22 08:08:54,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47781 to 47779. [2020-12-22 08:08:54,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47779 states. [2020-12-22 08:08:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47779 states to 47779 states and 78186 transitions. [2020-12-22 08:08:54,554 INFO L78 Accepts]: Start accepts. Automaton has 47779 states and 78186 transitions. Word has length 125 [2020-12-22 08:08:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:54,555 INFO L481 AbstractCegarLoop]: Abstraction has 47779 states and 78186 transitions. [2020-12-22 08:08:54,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 47779 states and 78186 transitions. [2020-12-22 08:08:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:08:54,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:54,557 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] [2020-12-22 08:08:54,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:08:54,558 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:54,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:54,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2056786782, now seen corresponding path program 1 times [2020-12-22 08:08:54,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:54,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117398267] [2020-12-22 08:08:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:54,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117398267] [2020-12-22 08:08:54,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:54,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:08:54,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863586498] [2020-12-22 08:08:54,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:08:54,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:54,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:08:54,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:54,635 INFO L87 Difference]: Start difference. First operand 47779 states and 78186 transitions. Second operand 3 states. [2020-12-22 08:08:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:58,210 INFO L93 Difference]: Finished difference Result 106298 states and 175363 transitions. [2020-12-22 08:08:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:58,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 08:08:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:58,375 INFO L225 Difference]: With dead ends: 106298 [2020-12-22 08:08:58,375 INFO L226 Difference]: Without dead ends: 71747 [2020-12-22 08:08:58,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71747 states. [2020-12-22 08:09:02,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71747 to 71745. [2020-12-22 08:09:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71745 states. [2020-12-22 08:09:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71745 states to 71745 states and 117564 transitions. [2020-12-22 08:09:02,363 INFO L78 Accepts]: Start accepts. Automaton has 71745 states and 117564 transitions. Word has length 125 [2020-12-22 08:09:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:02,363 INFO L481 AbstractCegarLoop]: Abstraction has 71745 states and 117564 transitions. [2020-12-22 08:09:02,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:09:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 71745 states and 117564 transitions. [2020-12-22 08:09:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 08:09:02,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:02,365 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] [2020-12-22 08:09:02,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:09:02,366 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:02,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:02,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1381723230, now seen corresponding path program 1 times [2020-12-22 08:09:02,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:02,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745880682] [2020-12-22 08:09:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:09:02,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745880682] [2020-12-22 08:09:02,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:02,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:09:02,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023013614] [2020-12-22 08:09:02,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:09:02,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:02,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:09:02,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:09:02,461 INFO L87 Difference]: Start difference. First operand 71745 states and 117564 transitions. Second operand 4 states. [2020-12-22 08:09:09,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:09,823 INFO L93 Difference]: Finished difference Result 221822 states and 364275 transitions. [2020-12-22 08:09:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:09:09,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-12-22 08:09:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:10,177 INFO L225 Difference]: With dead ends: 221822 [2020-12-22 08:09:10,178 INFO L226 Difference]: Without dead ends: 150321 [2020-12-22 08:09:10,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:09:10,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150321 states. [2020-12-22 08:09:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150321 to 110776. [2020-12-22 08:09:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110776 states. [2020-12-22 08:09:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110776 states to 110776 states and 181057 transitions. [2020-12-22 08:09:16,771 INFO L78 Accepts]: Start accepts. Automaton has 110776 states and 181057 transitions. Word has length 126 [2020-12-22 08:09:16,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:16,771 INFO L481 AbstractCegarLoop]: Abstraction has 110776 states and 181057 transitions. [2020-12-22 08:09:16,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:09:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 110776 states and 181057 transitions. [2020-12-22 08:09:16,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 08:09:16,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:16,773 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] [2020-12-22 08:09:16,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:09:16,773 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:16,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:16,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2086532755, now seen corresponding path program 1 times [2020-12-22 08:09:16,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:16,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228338834] [2020-12-22 08:09:16,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:09:17,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228338834] [2020-12-22 08:09:17,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:17,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:09:17,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511046832] [2020-12-22 08:09:17,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:09:17,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:17,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:09:17,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:09:17,211 INFO L87 Difference]: Start difference. First operand 110776 states and 181057 transitions. Second operand 6 states. [2020-12-22 08:09:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:26,866 INFO L93 Difference]: Finished difference Result 279054 states and 456463 transitions. [2020-12-22 08:09:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:09:26,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2020-12-22 08:09:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:27,434 INFO L225 Difference]: With dead ends: 279054 [2020-12-22 08:09:27,434 INFO L226 Difference]: Without dead ends: 168522 [2020-12-22 08:09:27,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:09:27,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168522 states. [2020-12-22 08:09:36,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168522 to 141796. [2020-12-22 08:09:36,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141796 states. [2020-12-22 08:09:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141796 states to 141796 states and 230812 transitions. [2020-12-22 08:09:36,842 INFO L78 Accepts]: Start accepts. Automaton has 141796 states and 230812 transitions. Word has length 128 [2020-12-22 08:09:36,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:09:36,842 INFO L481 AbstractCegarLoop]: Abstraction has 141796 states and 230812 transitions. [2020-12-22 08:09:36,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:09:36,842 INFO L276 IsEmpty]: Start isEmpty. Operand 141796 states and 230812 transitions. [2020-12-22 08:09:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 08:09:36,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:09:36,848 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] [2020-12-22 08:09:36,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:09:36,850 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:09:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:09:36,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1082243879, now seen corresponding path program 1 times [2020-12-22 08:09:36,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:09:36,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194841644] [2020-12-22 08:09:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:09:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:09:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:09:37,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194841644] [2020-12-22 08:09:37,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:09:37,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:09:37,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782819043] [2020-12-22 08:09:37,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:09:37,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:09:37,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:09:37,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:09:37,118 INFO L87 Difference]: Start difference. First operand 141796 states and 230812 transitions. Second operand 6 states. [2020-12-22 08:09:58,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:58,762 INFO L93 Difference]: Finished difference Result 463500 states and 755841 transitions. [2020-12-22 08:09:58,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:09:58,763 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2020-12-22 08:09:58,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:59,586 INFO L225 Difference]: With dead ends: 463500 [2020-12-22 08:09:59,586 INFO L226 Difference]: Without dead ends: 321948 [2020-12-22 08:09:59,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:10:00,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321948 states. [2020-12-22 08:10:15,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321948 to 195472. [2020-12-22 08:10:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195472 states. [2020-12-22 08:10:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195472 states to 195472 states and 317363 transitions. [2020-12-22 08:10:16,356 INFO L78 Accepts]: Start accepts. Automaton has 195472 states and 317363 transitions. Word has length 131 [2020-12-22 08:10:16,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:10:16,357 INFO L481 AbstractCegarLoop]: Abstraction has 195472 states and 317363 transitions. [2020-12-22 08:10:16,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:10:16,357 INFO L276 IsEmpty]: Start isEmpty. Operand 195472 states and 317363 transitions. [2020-12-22 08:10:16,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 08:10:16,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:10:16,359 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] [2020-12-22 08:10:16,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:10:16,359 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:10:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:10:16,359 INFO L82 PathProgramCache]: Analyzing trace with hash -812087216, now seen corresponding path program 1 times [2020-12-22 08:10:16,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:10:16,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029362646] [2020-12-22 08:10:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:10:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:10:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:10:16,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029362646] [2020-12-22 08:10:16,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:10:16,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:10:16,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375155707] [2020-12-22 08:10:16,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:10:16,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:10:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:10:16,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:10:16,597 INFO L87 Difference]: Start difference. First operand 195472 states and 317363 transitions. Second operand 5 states. [2020-12-22 08:10:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:10:46,693 INFO L93 Difference]: Finished difference Result 384896 states and 622435 transitions. [2020-12-22 08:10:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:10:46,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-12-22 08:10:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:10:47,741 INFO L225 Difference]: With dead ends: 384896 [2020-12-22 08:10:47,741 INFO L226 Difference]: Without dead ends: 384894 [2020-12-22 08:10:47,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:10:48,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384894 states. [2020-12-22 08:11:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384894 to 200188. [2020-12-22 08:11:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200188 states. [2020-12-22 08:11:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200188 states to 200188 states and 322052 transitions. [2020-12-22 08:11:07,535 INFO L78 Accepts]: Start accepts. Automaton has 200188 states and 322052 transitions. Word has length 132 [2020-12-22 08:11:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:11:07,535 INFO L481 AbstractCegarLoop]: Abstraction has 200188 states and 322052 transitions. [2020-12-22 08:11:07,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:11:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 200188 states and 322052 transitions. [2020-12-22 08:11:07,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 08:11:07,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:11:07,541 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:11:07,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:11:07,541 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:11:07,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:11:07,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1146801810, now seen corresponding path program 1 times [2020-12-22 08:11:07,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:11:07,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173204367] [2020-12-22 08:11:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:11:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:11:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 08:11:08,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173204367] [2020-12-22 08:11:08,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:11:08,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:11:08,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64803601] [2020-12-22 08:11:08,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:11:08,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:11:08,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:11:08,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:11:08,090 INFO L87 Difference]: Start difference. First operand 200188 states and 322052 transitions. Second operand 6 states.