/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/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:44:37,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:44:37,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:44:37,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:44:37,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:44:37,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:44:37,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:44:37,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:44:37,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:44:37,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:44:37,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:44:37,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:44:37,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:44:37,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:44:37,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:44:37,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:44:37,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:44:37,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:44:37,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:44:37,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:44:37,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:44:37,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:44:37,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:44:37,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:44:37,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 07:44:37,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 07:44:37,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 07:44:37,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 07:44:37,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 07:44:37,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 07:44:37,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:44:37,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:44:37,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:44:37,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:44:37,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:44:37,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:44:37,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:44:37,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:44:37,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:44:37,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:44:37,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:44:37,601 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:44:37,628 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:44:37,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:44:37,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:44:37,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:44:37,631 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:44:37,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:44:37,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:44:37,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:44:37,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:44:37,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:44:37,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:44:37,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:44:37,632 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:44:37,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:44:37,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:44:37,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:44:37,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:44:37,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:44:37,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:44:37,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:44:37,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:44:37,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:44:37,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:44:37,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:44:37,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:44:37,635 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:44:38,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:44:38,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:44:38,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:44:38,042 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:44:38,042 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:44:38,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:44:38,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a01242de7/60f6759b24f844a3bb736a2735700737/FLAG149392432 [2020-12-22 07:44:38,838 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:44:38,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:44:38,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a01242de7/60f6759b24f844a3bb736a2735700737/FLAG149392432 [2020-12-22 07:44:39,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a01242de7/60f6759b24f844a3bb736a2735700737 [2020-12-22 07:44:39,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:44:39,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:44:39,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:44:39,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:44:39,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:44:39,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:44:39" (1/1) ... [2020-12-22 07:44:39,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@82238c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:39, skipping insertion in model container [2020-12-22 07:44:39,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:44:39" (1/1) ... [2020-12-22 07:44:39,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:44:39,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:44:39,634 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/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c[55979,55992] [2020-12-22 07:44:39,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:44:39,656 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:44:39,876 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/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c[55979,55992] [2020-12-22 07:44:39,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:44:39,901 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:44:39,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:39 WrapperNode [2020-12-22 07:44:39,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:44:39,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:44:39,904 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:44:39,904 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:44:39,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:39" (1/1) ... [2020-12-22 07:44:39,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:39" (1/1) ... [2020-12-22 07:44:40,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:44:40,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:44:40,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:44:40,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:44:40,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:39" (1/1) ... [2020-12-22 07:44:40,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:39" (1/1) ... [2020-12-22 07:44:40,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:39" (1/1) ... [2020-12-22 07:44:40,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:39" (1/1) ... [2020-12-22 07:44:40,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:39" (1/1) ... [2020-12-22 07:44:40,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:39" (1/1) ... [2020-12-22 07:44:40,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:39" (1/1) ... [2020-12-22 07:44:40,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:44:40,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:44:40,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:44:40,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:44:40,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:39" (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 07:44:40,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:44:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:44:40,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:44:40,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:44:42,685 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:44:42,686 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:44:42,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:44:42 BoogieIcfgContainer [2020-12-22 07:44:42,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:44:42,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:44:42,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:44:42,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:44:42,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:44:39" (1/3) ... [2020-12-22 07:44:42,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208413ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:44:42, skipping insertion in model container [2020-12-22 07:44:42,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:39" (2/3) ... [2020-12-22 07:44:42,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208413ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:44:42, skipping insertion in model container [2020-12-22 07:44:42,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:44:42" (3/3) ... [2020-12-22 07:44:42,705 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:44:42,712 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:44:42,718 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:44:42,738 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:44:42,771 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:44:42,771 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:44:42,771 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:44:42,771 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:44:42,771 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:44:42,772 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:44:42,772 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:44:42,772 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:44:42,802 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states. [2020-12-22 07:44:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:44:42,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:42,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:42,835 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:42,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:42,842 INFO L82 PathProgramCache]: Analyzing trace with hash 551316022, now seen corresponding path program 1 times [2020-12-22 07:44:42,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:42,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85388387] [2020-12-22 07:44:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:43,555 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 07:44:43,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85388387] [2020-12-22 07:44:43,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:43,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:44:43,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426115777] [2020-12-22 07:44:43,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:44:43,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:43,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:44:43,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:44:43,590 INFO L87 Difference]: Start difference. First operand 725 states. Second operand 5 states. [2020-12-22 07:44:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:43,790 INFO L93 Difference]: Finished difference Result 919 states and 1669 transitions. [2020-12-22 07:44:43,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:44:43,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-12-22 07:44:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:43,818 INFO L225 Difference]: With dead ends: 919 [2020-12-22 07:44:43,818 INFO L226 Difference]: Without dead ends: 721 [2020-12-22 07:44:43,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:44:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2020-12-22 07:44:43,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2020-12-22 07:44:43,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2020-12-22 07:44:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1280 transitions. [2020-12-22 07:44:43,940 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1280 transitions. Word has length 153 [2020-12-22 07:44:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:43,941 INFO L481 AbstractCegarLoop]: Abstraction has 721 states and 1280 transitions. [2020-12-22 07:44:43,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:44:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1280 transitions. [2020-12-22 07:44:43,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-12-22 07:44:43,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:43,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:43,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:44:43,957 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:43,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:43,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2070541714, now seen corresponding path program 1 times [2020-12-22 07:44:43,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:43,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485771864] [2020-12-22 07:44:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:44,357 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 07:44:44,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485771864] [2020-12-22 07:44:44,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:44,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:44,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645601907] [2020-12-22 07:44:44,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:44,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:44,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:44,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:44,364 INFO L87 Difference]: Start difference. First operand 721 states and 1280 transitions. Second operand 3 states. [2020-12-22 07:44:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:44,487 INFO L93 Difference]: Finished difference Result 1087 states and 1912 transitions. [2020-12-22 07:44:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:44,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2020-12-22 07:44:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:44,508 INFO L225 Difference]: With dead ends: 1087 [2020-12-22 07:44:44,509 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 07:44:44,518 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 07:44:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 07:44:44,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 894. [2020-12-22 07:44:44,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2020-12-22 07:44:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1575 transitions. [2020-12-22 07:44:44,589 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1575 transitions. Word has length 197 [2020-12-22 07:44:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:44,592 INFO L481 AbstractCegarLoop]: Abstraction has 894 states and 1575 transitions. [2020-12-22 07:44:44,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1575 transitions. [2020-12-22 07:44:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-22 07:44:44,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:44,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:44,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:44:44,619 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:44,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:44,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1987778070, now seen corresponding path program 1 times [2020-12-22 07:44:44,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:44,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716382391] [2020-12-22 07:44:44,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:44,922 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 07:44:44,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716382391] [2020-12-22 07:44:44,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:44,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:44,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532500388] [2020-12-22 07:44:44,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:44,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:44,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:44,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:44,947 INFO L87 Difference]: Start difference. First operand 894 states and 1575 transitions. Second operand 3 states. [2020-12-22 07:44:45,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:45,035 INFO L93 Difference]: Finished difference Result 1596 states and 2779 transitions. [2020-12-22 07:44:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:45,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2020-12-22 07:44:45,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:45,048 INFO L225 Difference]: With dead ends: 1596 [2020-12-22 07:44:45,048 INFO L226 Difference]: Without dead ends: 1233 [2020-12-22 07:44:45,050 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 07:44:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2020-12-22 07:44:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1229. [2020-12-22 07:44:45,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1229 states. [2020-12-22 07:44:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 2148 transitions. [2020-12-22 07:44:45,108 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 2148 transitions. Word has length 201 [2020-12-22 07:44:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:45,117 INFO L481 AbstractCegarLoop]: Abstraction has 1229 states and 2148 transitions. [2020-12-22 07:44:45,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:45,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 2148 transitions. [2020-12-22 07:44:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-12-22 07:44:45,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:45,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:45,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:44:45,124 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:45,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:45,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2063135678, now seen corresponding path program 1 times [2020-12-22 07:44:45,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:45,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599333852] [2020-12-22 07:44:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:45,438 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 07:44:45,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599333852] [2020-12-22 07:44:45,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:45,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:45,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924627639] [2020-12-22 07:44:45,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:45,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:45,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:45,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:45,447 INFO L87 Difference]: Start difference. First operand 1229 states and 2148 transitions. Second operand 3 states. [2020-12-22 07:44:45,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:45,562 INFO L93 Difference]: Finished difference Result 2577 states and 4454 transitions. [2020-12-22 07:44:45,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:45,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2020-12-22 07:44:45,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:45,580 INFO L225 Difference]: With dead ends: 2577 [2020-12-22 07:44:45,580 INFO L226 Difference]: Without dead ends: 1879 [2020-12-22 07:44:45,583 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 07:44:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2020-12-22 07:44:45,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1873. [2020-12-22 07:44:45,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1873 states. [2020-12-22 07:44:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3244 transitions. [2020-12-22 07:44:45,679 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3244 transitions. Word has length 205 [2020-12-22 07:44:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:45,680 INFO L481 AbstractCegarLoop]: Abstraction has 1873 states and 3244 transitions. [2020-12-22 07:44:45,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3244 transitions. [2020-12-22 07:44:45,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-12-22 07:44:45,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:45,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:45,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:44:45,690 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:45,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:45,690 INFO L82 PathProgramCache]: Analyzing trace with hash 817472358, now seen corresponding path program 1 times [2020-12-22 07:44:45,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:45,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263489030] [2020-12-22 07:44:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:46,063 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 07:44:46,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263489030] [2020-12-22 07:44:46,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:46,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:46,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63080537] [2020-12-22 07:44:46,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:46,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:46,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:46,066 INFO L87 Difference]: Start difference. First operand 1873 states and 3244 transitions. Second operand 3 states. [2020-12-22 07:44:46,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:46,147 INFO L93 Difference]: Finished difference Result 4461 states and 7654 transitions. [2020-12-22 07:44:46,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:46,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 209 [2020-12-22 07:44:46,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:46,167 INFO L225 Difference]: With dead ends: 4461 [2020-12-22 07:44:46,168 INFO L226 Difference]: Without dead ends: 3119 [2020-12-22 07:44:46,171 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 07:44:46,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3119 states. [2020-12-22 07:44:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3119 to 3109. [2020-12-22 07:44:46,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3109 states. [2020-12-22 07:44:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 5336 transitions. [2020-12-22 07:44:46,272 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 5336 transitions. Word has length 209 [2020-12-22 07:44:46,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:46,273 INFO L481 AbstractCegarLoop]: Abstraction has 3109 states and 5336 transitions. [2020-12-22 07:44:46,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 5336 transitions. [2020-12-22 07:44:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-12-22 07:44:46,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:46,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:46,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:44:46,280 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:46,280 INFO L82 PathProgramCache]: Analyzing trace with hash -85514994, now seen corresponding path program 1 times [2020-12-22 07:44:46,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:46,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487505102] [2020-12-22 07:44:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:46,562 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 07:44:46,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487505102] [2020-12-22 07:44:46,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:46,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:46,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89621219] [2020-12-22 07:44:46,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:46,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:46,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:46,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:46,565 INFO L87 Difference]: Start difference. First operand 3109 states and 5336 transitions. Second operand 3 states. [2020-12-22 07:44:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:46,688 INFO L93 Difference]: Finished difference Result 8073 states and 13754 transitions. [2020-12-22 07:44:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:46,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 213 [2020-12-22 07:44:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:46,719 INFO L225 Difference]: With dead ends: 8073 [2020-12-22 07:44:46,719 INFO L226 Difference]: Without dead ends: 5495 [2020-12-22 07:44:46,728 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 07:44:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2020-12-22 07:44:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 5477. [2020-12-22 07:44:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5477 states. [2020-12-22 07:44:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5477 states to 5477 states and 9320 transitions. [2020-12-22 07:44:46,899 INFO L78 Accepts]: Start accepts. Automaton has 5477 states and 9320 transitions. Word has length 213 [2020-12-22 07:44:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:46,899 INFO L481 AbstractCegarLoop]: Abstraction has 5477 states and 9320 transitions. [2020-12-22 07:44:46,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 5477 states and 9320 transitions. [2020-12-22 07:44:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-22 07:44:46,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:46,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:46,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:44:46,906 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:46,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2127857482, now seen corresponding path program 1 times [2020-12-22 07:44:46,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:46,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153528232] [2020-12-22 07:44:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:47,252 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 07:44:47,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153528232] [2020-12-22 07:44:47,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:47,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:44:47,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706388297] [2020-12-22 07:44:47,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:44:47,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:47,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:44:47,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:44:47,256 INFO L87 Difference]: Start difference. First operand 5477 states and 9320 transitions. Second operand 7 states. [2020-12-22 07:44:48,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:48,183 INFO L93 Difference]: Finished difference Result 30935 states and 52673 transitions. [2020-12-22 07:44:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:44:48,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 217 [2020-12-22 07:44:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:48,311 INFO L225 Difference]: With dead ends: 30935 [2020-12-22 07:44:48,311 INFO L226 Difference]: Without dead ends: 25989 [2020-12-22 07:44:48,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:44:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25989 states. [2020-12-22 07:44:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25989 to 12696. [2020-12-22 07:44:48,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12696 states. [2020-12-22 07:44:49,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12696 states to 12696 states and 21590 transitions. [2020-12-22 07:44:49,057 INFO L78 Accepts]: Start accepts. Automaton has 12696 states and 21590 transitions. Word has length 217 [2020-12-22 07:44:49,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:49,058 INFO L481 AbstractCegarLoop]: Abstraction has 12696 states and 21590 transitions. [2020-12-22 07:44:49,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:44:49,058 INFO L276 IsEmpty]: Start isEmpty. Operand 12696 states and 21590 transitions. [2020-12-22 07:44:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-12-22 07:44:49,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:49,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:49,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:44:49,148 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash 489515435, now seen corresponding path program 1 times [2020-12-22 07:44:49,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:49,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664362054] [2020-12-22 07:44:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:49,384 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 07:44:49,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664362054] [2020-12-22 07:44:49,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:49,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:49,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217723884] [2020-12-22 07:44:49,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:49,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:49,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:49,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:49,386 INFO L87 Difference]: Start difference. First operand 12696 states and 21590 transitions. Second operand 4 states. [2020-12-22 07:44:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:49,796 INFO L93 Difference]: Finished difference Result 29913 states and 50867 transitions. [2020-12-22 07:44:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:49,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 218 [2020-12-22 07:44:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:49,839 INFO L225 Difference]: With dead ends: 29913 [2020-12-22 07:44:49,839 INFO L226 Difference]: Without dead ends: 17748 [2020-12-22 07:44:49,859 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 07:44:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17748 states. [2020-12-22 07:44:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17748 to 17713. [2020-12-22 07:44:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17713 states. [2020-12-22 07:44:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17713 states to 17713 states and 30102 transitions. [2020-12-22 07:44:50,562 INFO L78 Accepts]: Start accepts. Automaton has 17713 states and 30102 transitions. Word has length 218 [2020-12-22 07:44:50,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:50,563 INFO L481 AbstractCegarLoop]: Abstraction has 17713 states and 30102 transitions. [2020-12-22 07:44:50,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:44:50,563 INFO L276 IsEmpty]: Start isEmpty. Operand 17713 states and 30102 transitions. [2020-12-22 07:44:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-12-22 07:44:50,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:50,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:50,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:44:50,576 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:50,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:50,577 INFO L82 PathProgramCache]: Analyzing trace with hash 192701581, now seen corresponding path program 1 times [2020-12-22 07:44:50,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:50,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159426383] [2020-12-22 07:44:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:50,940 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 07:44:50,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159426383] [2020-12-22 07:44:50,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:50,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:50,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104761035] [2020-12-22 07:44:50,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:50,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:50,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:50,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:50,945 INFO L87 Difference]: Start difference. First operand 17713 states and 30102 transitions. Second operand 4 states. [2020-12-22 07:44:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:51,651 INFO L93 Difference]: Finished difference Result 52768 states and 89730 transitions. [2020-12-22 07:44:51,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:51,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 219 [2020-12-22 07:44:51,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:51,739 INFO L225 Difference]: With dead ends: 52768 [2020-12-22 07:44:51,739 INFO L226 Difference]: Without dead ends: 35586 [2020-12-22 07:44:51,769 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 07:44:51,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35586 states. [2020-12-22 07:44:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35586 to 26381. [2020-12-22 07:44:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26381 states. [2020-12-22 07:44:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26381 states to 26381 states and 44769 transitions. [2020-12-22 07:44:52,909 INFO L78 Accepts]: Start accepts. Automaton has 26381 states and 44769 transitions. Word has length 219 [2020-12-22 07:44:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:52,909 INFO L481 AbstractCegarLoop]: Abstraction has 26381 states and 44769 transitions. [2020-12-22 07:44:52,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:44:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 26381 states and 44769 transitions. [2020-12-22 07:44:52,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 07:44:52,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:52,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:52,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:44:52,922 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:52,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:52,923 INFO L82 PathProgramCache]: Analyzing trace with hash -249588958, now seen corresponding path program 1 times [2020-12-22 07:44:52,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:52,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104086007] [2020-12-22 07:44:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:53,228 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 07:44:53,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104086007] [2020-12-22 07:44:53,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:53,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:53,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593849936] [2020-12-22 07:44:53,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:53,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:53,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:53,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:53,230 INFO L87 Difference]: Start difference. First operand 26381 states and 44769 transitions. Second operand 4 states. [2020-12-22 07:44:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:54,417 INFO L93 Difference]: Finished difference Result 79097 states and 134356 transitions. [2020-12-22 07:44:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:54,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 220 [2020-12-22 07:44:54,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:54,572 INFO L225 Difference]: With dead ends: 79097 [2020-12-22 07:44:54,572 INFO L226 Difference]: Without dead ends: 53247 [2020-12-22 07:44:54,606 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 07:44:54,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53247 states. [2020-12-22 07:44:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53247 to 39289. [2020-12-22 07:44:55,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39289 states. [2020-12-22 07:44:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39289 states to 39289 states and 66592 transitions. [2020-12-22 07:44:56,029 INFO L78 Accepts]: Start accepts. Automaton has 39289 states and 66592 transitions. Word has length 220 [2020-12-22 07:44:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:56,030 INFO L481 AbstractCegarLoop]: Abstraction has 39289 states and 66592 transitions. [2020-12-22 07:44:56,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:44:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 39289 states and 66592 transitions. [2020-12-22 07:44:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-22 07:44:56,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:56,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:56,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:44:56,053 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:56,053 INFO L82 PathProgramCache]: Analyzing trace with hash -906689436, now seen corresponding path program 1 times [2020-12-22 07:44:56,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:56,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978402760] [2020-12-22 07:44:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:44:56,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978402760] [2020-12-22 07:44:56,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:56,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:56,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921999869] [2020-12-22 07:44:56,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:56,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:56,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:56,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:56,432 INFO L87 Difference]: Start difference. First operand 39289 states and 66592 transitions. Second operand 4 states. [2020-12-22 07:44:57,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:57,848 INFO L93 Difference]: Finished difference Result 118289 states and 200725 transitions. [2020-12-22 07:44:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:57,849 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2020-12-22 07:44:57,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:58,005 INFO L225 Difference]: With dead ends: 118289 [2020-12-22 07:44:58,006 INFO L226 Difference]: Without dead ends: 79531 [2020-12-22 07:44:58,046 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 07:44:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79531 states. [2020-12-22 07:45:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79531 to 58368. [2020-12-22 07:45:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58368 states. [2020-12-22 07:45:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58368 states to 58368 states and 98821 transitions. [2020-12-22 07:45:00,293 INFO L78 Accepts]: Start accepts. Automaton has 58368 states and 98821 transitions. Word has length 221 [2020-12-22 07:45:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:00,294 INFO L481 AbstractCegarLoop]: Abstraction has 58368 states and 98821 transitions. [2020-12-22 07:45:00,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:45:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 58368 states and 98821 transitions. [2020-12-22 07:45:00,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-22 07:45:00,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:00,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:00,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:45:00,315 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:00,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:00,315 INFO L82 PathProgramCache]: Analyzing trace with hash 880345225, now seen corresponding path program 1 times [2020-12-22 07:45:00,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:00,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255890628] [2020-12-22 07:45:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:00,492 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 07:45:00,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255890628] [2020-12-22 07:45:00,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:00,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:00,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287230976] [2020-12-22 07:45:00,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:00,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:00,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:00,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:00,494 INFO L87 Difference]: Start difference. First operand 58368 states and 98821 transitions. Second operand 3 states. [2020-12-22 07:45:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:02,044 INFO L93 Difference]: Finished difference Result 119154 states and 201525 transitions. [2020-12-22 07:45:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:02,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2020-12-22 07:45:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:02,210 INFO L225 Difference]: With dead ends: 119154 [2020-12-22 07:45:02,211 INFO L226 Difference]: Without dead ends: 87073 [2020-12-22 07:45:02,254 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 07:45:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87073 states. [2020-12-22 07:45:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87073 to 87071. [2020-12-22 07:45:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87071 states. [2020-12-22 07:45:04,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87071 states to 87071 states and 146761 transitions. [2020-12-22 07:45:04,609 INFO L78 Accepts]: Start accepts. Automaton has 87071 states and 146761 transitions. Word has length 221 [2020-12-22 07:45:04,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:04,609 INFO L481 AbstractCegarLoop]: Abstraction has 87071 states and 146761 transitions. [2020-12-22 07:45:04,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:04,609 INFO L276 IsEmpty]: Start isEmpty. Operand 87071 states and 146761 transitions. [2020-12-22 07:45:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-22 07:45:04,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:04,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:04,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:45:04,624 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:04,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:04,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1223508087, now seen corresponding path program 1 times [2020-12-22 07:45:04,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:04,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889883650] [2020-12-22 07:45:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:05,019 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 07:45:05,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889883650] [2020-12-22 07:45:05,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:05,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:05,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794972639] [2020-12-22 07:45:05,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:05,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:05,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:05,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:05,022 INFO L87 Difference]: Start difference. First operand 87071 states and 146761 transitions. Second operand 3 states. [2020-12-22 07:45:06,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:06,970 INFO L93 Difference]: Finished difference Result 191326 states and 322935 transitions. [2020-12-22 07:45:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:06,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2020-12-22 07:45:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:07,433 INFO L225 Difference]: With dead ends: 191326 [2020-12-22 07:45:07,434 INFO L226 Difference]: Without dead ends: 132426 [2020-12-22 07:45:07,526 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 07:45:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132426 states. [2020-12-22 07:45:10,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132426 to 132424. [2020-12-22 07:45:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132424 states. [2020-12-22 07:45:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132424 states to 132424 states and 222844 transitions. [2020-12-22 07:45:10,733 INFO L78 Accepts]: Start accepts. Automaton has 132424 states and 222844 transitions. Word has length 221 [2020-12-22 07:45:10,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:10,748 INFO L481 AbstractCegarLoop]: Abstraction has 132424 states and 222844 transitions. [2020-12-22 07:45:10,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 132424 states and 222844 transitions. [2020-12-22 07:45:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-22 07:45:10,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:10,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:10,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:45:10,768 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:10,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1619165559, now seen corresponding path program 1 times [2020-12-22 07:45:10,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:10,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626287486] [2020-12-22 07:45:10,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:10,953 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 07:45:10,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626287486] [2020-12-22 07:45:10,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:10,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:10,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055468049] [2020-12-22 07:45:10,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:10,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:10,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:10,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:10,955 INFO L87 Difference]: Start difference. First operand 132424 states and 222844 transitions. Second operand 3 states. [2020-12-22 07:45:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:13,917 INFO L93 Difference]: Finished difference Result 293255 states and 493800 transitions. [2020-12-22 07:45:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:13,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2020-12-22 07:45:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:14,292 INFO L225 Difference]: With dead ends: 293255 [2020-12-22 07:45:14,292 INFO L226 Difference]: Without dead ends: 202173 [2020-12-22 07:45:14,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202173 states. [2020-12-22 07:45:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202173 to 202171. [2020-12-22 07:45:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202171 states. [2020-12-22 07:45:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202171 states to 202171 states and 339250 transitions. [2020-12-22 07:45:19,019 INFO L78 Accepts]: Start accepts. Automaton has 202171 states and 339250 transitions. Word has length 221 [2020-12-22 07:45:19,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:19,019 INFO L481 AbstractCegarLoop]: Abstraction has 202171 states and 339250 transitions. [2020-12-22 07:45:19,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:19,020 INFO L276 IsEmpty]: Start isEmpty. Operand 202171 states and 339250 transitions. [2020-12-22 07:45:19,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-22 07:45:19,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:19,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:19,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:45:19,024 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:19,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:19,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1934017143, now seen corresponding path program 1 times [2020-12-22 07:45:19,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:19,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464481309] [2020-12-22 07:45:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:19,554 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 07:45:19,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464481309] [2020-12-22 07:45:19,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:19,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:19,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363321758] [2020-12-22 07:45:19,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:19,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:19,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:19,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:19,559 INFO L87 Difference]: Start difference. First operand 202171 states and 339250 transitions. Second operand 3 states. [2020-12-22 07:45:24,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:24,017 INFO L93 Difference]: Finished difference Result 448487 states and 752738 transitions. [2020-12-22 07:45:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:24,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2020-12-22 07:45:24,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:24,867 INFO L225 Difference]: With dead ends: 448487 [2020-12-22 07:45:24,867 INFO L226 Difference]: Without dead ends: 308685 [2020-12-22 07:45:25,001 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 07:45:25,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308685 states. [2020-12-22 07:45:31,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308685 to 308683. [2020-12-22 07:45:31,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308683 states. [2020-12-22 07:45:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308683 states to 308683 states and 515991 transitions. [2020-12-22 07:45:32,516 INFO L78 Accepts]: Start accepts. Automaton has 308683 states and 515991 transitions. Word has length 221 [2020-12-22 07:45:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:32,516 INFO L481 AbstractCegarLoop]: Abstraction has 308683 states and 515991 transitions. [2020-12-22 07:45:32,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 308683 states and 515991 transitions. [2020-12-22 07:45:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-22 07:45:32,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:32,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:32,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:45:32,524 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:32,536 INFO L82 PathProgramCache]: Analyzing trace with hash 499514505, now seen corresponding path program 1 times [2020-12-22 07:45:32,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:32,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159550373] [2020-12-22 07:45:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:32,693 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 07:45:32,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159550373] [2020-12-22 07:45:32,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:32,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:32,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431699741] [2020-12-22 07:45:32,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:32,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:32,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:32,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:32,698 INFO L87 Difference]: Start difference. First operand 308683 states and 515991 transitions. Second operand 3 states. [2020-12-22 07:45:40,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:40,720 INFO L93 Difference]: Finished difference Result 709010 states and 1188297 transitions. [2020-12-22 07:45:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:40,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2020-12-22 07:45:40,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:41,744 INFO L225 Difference]: With dead ends: 709010 [2020-12-22 07:45:41,744 INFO L226 Difference]: Without dead ends: 479870 [2020-12-22 07:45:41,964 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 07:45:42,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479870 states. [2020-12-22 07:45:56,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479870 to 479868. [2020-12-22 07:45:56,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479868 states. [2020-12-22 07:45:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479868 states to 479868 states and 799736 transitions. [2020-12-22 07:45:58,231 INFO L78 Accepts]: Start accepts. Automaton has 479868 states and 799736 transitions. Word has length 221 [2020-12-22 07:45:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:58,232 INFO L481 AbstractCegarLoop]: Abstraction has 479868 states and 799736 transitions. [2020-12-22 07:45:58,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:58,232 INFO L276 IsEmpty]: Start isEmpty. Operand 479868 states and 799736 transitions. [2020-12-22 07:45:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-22 07:45:58,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:58,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:45:58,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:45:58,234 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:58,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:58,235 INFO L82 PathProgramCache]: Analyzing trace with hash 367036569, now seen corresponding path program 1 times [2020-12-22 07:45:58,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:58,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317540048] [2020-12-22 07:45:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:45:58,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317540048] [2020-12-22 07:45:58,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:58,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:45:58,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532185075] [2020-12-22 07:45:58,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:45:58,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:58,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:45:58,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:58,544 INFO L87 Difference]: Start difference. First operand 479868 states and 799736 transitions. Second operand 4 states. [2020-12-22 07:46:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:17,088 INFO L93 Difference]: Finished difference Result 1553359 states and 2591699 transitions. [2020-12-22 07:46:17,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:46:17,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 222 [2020-12-22 07:46:17,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:19,672 INFO L225 Difference]: With dead ends: 1553359 [2020-12-22 07:46:19,672 INFO L226 Difference]: Without dead ends: 1074104 [2020-12-22 07:46:20,602 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 07:46:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074104 states. [2020-12-22 07:46:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074104 to 775619. [2020-12-22 07:46:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775619 states. [2020-12-22 07:46:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775619 states to 775619 states and 1289564 transitions. [2020-12-22 07:46:53,738 INFO L78 Accepts]: Start accepts. Automaton has 775619 states and 1289564 transitions. Word has length 222 [2020-12-22 07:46:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:53,738 INFO L481 AbstractCegarLoop]: Abstraction has 775619 states and 1289564 transitions. [2020-12-22 07:46:53,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:46:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 775619 states and 1289564 transitions. [2020-12-22 07:46:53,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 07:46:53,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:53,749 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:53,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:46:53,749 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:53,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:53,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1769913903, now seen corresponding path program 1 times [2020-12-22 07:46:53,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:53,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774003845] [2020-12-22 07:46:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:54,538 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 07:46:54,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774003845] [2020-12-22 07:46:54,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:54,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:46:54,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868730152] [2020-12-22 07:46:54,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:46:54,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:54,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:46:54,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:46:54,544 INFO L87 Difference]: Start difference. First operand 775619 states and 1289564 transitions. Second operand 7 states. [2020-12-22 07:47:21,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:47:21,925 INFO L93 Difference]: Finished difference Result 1550629 states and 2578049 transitions. [2020-12-22 07:47:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:47:21,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 224 [2020-12-22 07:47:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:47:24,155 INFO L225 Difference]: With dead ends: 1550629 [2020-12-22 07:47:24,155 INFO L226 Difference]: Without dead ends: 775623 [2020-12-22 07:47:24,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:47:25,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775623 states.