/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_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:46:33,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:46:33,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:46:33,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:46:33,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:46:33,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:46:33,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:46:33,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:46:33,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:46:33,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:46:33,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:46:33,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:46:33,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:46:33,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:46:33,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:46:33,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:46:33,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:46:33,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:46:33,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:46:33,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:46:33,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:46:33,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:46:33,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:46:33,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:46:33,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 07:46:33,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 07:46:33,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 07:46:33,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 07:46:33,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 07:46:33,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 07:46:33,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:46:33,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:46:33,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:46:33,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:46:33,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:46:33,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:46:33,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:46:33,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:46:33,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:46:33,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:46:33,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:46:33,806 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:46:33,839 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:46:33,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:46:33,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:46:33,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:46:33,842 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:46:33,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:46:33,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:46:33,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:46:33,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:46:33,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:46:33,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:46:33,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:46:33,847 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:46:33,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:46:33,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:46:33,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:46:33,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:46:33,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:46:33,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:46:33,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:46:33,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:46:33,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:46:33,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:46:33,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:46:33,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:46:33,850 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:46:34,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:46:34,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:46:34,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:46:34,298 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:46:34,299 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:46:34,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:46:34,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd43d92b9/06fda6cf893a44a1a48b283134a32cdc/FLAGb1ee83898 [2020-12-22 07:46:35,260 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:46:35,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:46:35,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd43d92b9/06fda6cf893a44a1a48b283134a32cdc/FLAGb1ee83898 [2020-12-22 07:46:35,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd43d92b9/06fda6cf893a44a1a48b283134a32cdc [2020-12-22 07:46:35,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:46:35,506 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:46:35,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:46:35,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:46:35,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:46:35,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:46:35" (1/1) ... [2020-12-22 07:46:35,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a6b7cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:35, skipping insertion in model container [2020-12-22 07:46:35,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:46:35" (1/1) ... [2020-12-22 07:46:35,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:46:35,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:46:36,181 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_overflow.ufo.UNBOUNDED.pals.c[65601,65614] [2020-12-22 07:46:36,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:46:36,205 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:46:36,471 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_overflow.ufo.UNBOUNDED.pals.c[65601,65614] [2020-12-22 07:46:36,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:46:36,495 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:46:36,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:36 WrapperNode [2020-12-22 07:46:36,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:46:36,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:46:36,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:46:36,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:46:36,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:36" (1/1) ... [2020-12-22 07:46:36,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:36" (1/1) ... [2020-12-22 07:46:36,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:46:36,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:46:36,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:46:36,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:46:36,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:36" (1/1) ... [2020-12-22 07:46:36,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:36" (1/1) ... [2020-12-22 07:46:36,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:36" (1/1) ... [2020-12-22 07:46:36,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:36" (1/1) ... [2020-12-22 07:46:36,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:36" (1/1) ... [2020-12-22 07:46:36,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:36" (1/1) ... [2020-12-22 07:46:36,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:36" (1/1) ... [2020-12-22 07:46:36,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:46:36,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:46:36,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:46:36,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:46:36,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:36" (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 07:46:36,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:46:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:46:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:46:36,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:46:39,268 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:46:39,268 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:46:39,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:46:39 BoogieIcfgContainer [2020-12-22 07:46:39,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:46:39,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:46:39,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:46:39,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:46:39,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:46:35" (1/3) ... [2020-12-22 07:46:39,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b6bfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:46:39, skipping insertion in model container [2020-12-22 07:46:39,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:46:36" (2/3) ... [2020-12-22 07:46:39,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b6bfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:46:39, skipping insertion in model container [2020-12-22 07:46:39,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:46:39" (3/3) ... [2020-12-22 07:46:39,281 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:46:39,288 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:46:39,294 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:46:39,314 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:46:39,346 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:46:39,347 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:46:39,347 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:46:39,347 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:46:39,347 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:46:39,347 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:46:39,347 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:46:39,348 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:46:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states. [2020-12-22 07:46:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:46:39,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:39,416 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 07:46:39,417 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:39,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:39,423 INFO L82 PathProgramCache]: Analyzing trace with hash -388227635, now seen corresponding path program 1 times [2020-12-22 07:46:39,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:39,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836602561] [2020-12-22 07:46:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:40,218 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 07:46:40,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836602561] [2020-12-22 07:46:40,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:40,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:46:40,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033581633] [2020-12-22 07:46:40,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:46:40,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:40,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:46:40,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:46:40,245 INFO L87 Difference]: Start difference. First operand 735 states. Second operand 2 states. [2020-12-22 07:46:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:40,315 INFO L93 Difference]: Finished difference Result 916 states and 1675 transitions. [2020-12-22 07:46:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:46:40,317 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 153 [2020-12-22 07:46:40,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:40,351 INFO L225 Difference]: With dead ends: 916 [2020-12-22 07:46:40,351 INFO L226 Difference]: Without dead ends: 731 [2020-12-22 07:46:40,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:46:40,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-12-22 07:46:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2020-12-22 07:46:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-22 07:46:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1350 transitions. [2020-12-22 07:46:40,509 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1350 transitions. Word has length 153 [2020-12-22 07:46:40,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:40,513 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1350 transitions. [2020-12-22 07:46:40,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:46:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1350 transitions. [2020-12-22 07:46:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:46:40,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:40,527 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 07:46:40,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:46:40,529 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:40,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:40,530 INFO L82 PathProgramCache]: Analyzing trace with hash -897700725, now seen corresponding path program 1 times [2020-12-22 07:46:40,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:40,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5417433] [2020-12-22 07:46:40,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:40,786 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 07:46:40,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5417433] [2020-12-22 07:46:40,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:40,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:46:40,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560944020] [2020-12-22 07:46:40,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:46:40,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:40,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:46:40,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:46:40,791 INFO L87 Difference]: Start difference. First operand 731 states and 1350 transitions. Second operand 5 states. [2020-12-22 07:46:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:40,981 INFO L93 Difference]: Finished difference Result 915 states and 1668 transitions. [2020-12-22 07:46:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:46:40,982 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-12-22 07:46:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:40,988 INFO L225 Difference]: With dead ends: 915 [2020-12-22 07:46:40,988 INFO L226 Difference]: Without dead ends: 731 [2020-12-22 07:46:40,990 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 07:46:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-12-22 07:46:41,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2020-12-22 07:46:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-22 07:46:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1285 transitions. [2020-12-22 07:46:41,012 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1285 transitions. Word has length 153 [2020-12-22 07:46:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:41,013 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1285 transitions. [2020-12-22 07:46:41,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:46:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1285 transitions. [2020-12-22 07:46:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-22 07:46:41,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:41,017 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 07:46:41,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:46:41,018 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:41,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:41,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1598055145, now seen corresponding path program 1 times [2020-12-22 07:46:41,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:41,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790668233] [2020-12-22 07:46:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:41,353 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 07:46:41,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790668233] [2020-12-22 07:46:41,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:41,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:41,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940699455] [2020-12-22 07:46:41,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:41,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:41,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:41,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:41,357 INFO L87 Difference]: Start difference. First operand 731 states and 1285 transitions. Second operand 3 states. [2020-12-22 07:46:41,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:41,426 INFO L93 Difference]: Finished difference Result 1077 states and 1887 transitions. [2020-12-22 07:46:41,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:46:41,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2020-12-22 07:46:41,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:41,433 INFO L225 Difference]: With dead ends: 1077 [2020-12-22 07:46:41,434 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 07:46:41,435 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 07:46:41,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 07:46:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 895. [2020-12-22 07:46:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2020-12-22 07:46:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1567 transitions. [2020-12-22 07:46:41,461 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1567 transitions. Word has length 217 [2020-12-22 07:46:41,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:41,462 INFO L481 AbstractCegarLoop]: Abstraction has 895 states and 1567 transitions. [2020-12-22 07:46:41,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:46:41,462 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1567 transitions. [2020-12-22 07:46:41,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-22 07:46:41,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:41,467 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 07:46:41,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:46:41,467 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:41,468 INFO L82 PathProgramCache]: Analyzing trace with hash 741252945, now seen corresponding path program 1 times [2020-12-22 07:46:41,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:41,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971127956] [2020-12-22 07:46:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:41,791 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 07:46:41,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971127956] [2020-12-22 07:46:41,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:41,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:41,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222732709] [2020-12-22 07:46:41,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:41,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:41,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:41,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:41,799 INFO L87 Difference]: Start difference. First operand 895 states and 1567 transitions. Second operand 3 states. [2020-12-22 07:46:41,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:41,874 INFO L93 Difference]: Finished difference Result 1559 states and 2715 transitions. [2020-12-22 07:46:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:46:41,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2020-12-22 07:46:41,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:41,884 INFO L225 Difference]: With dead ends: 1559 [2020-12-22 07:46:41,884 INFO L226 Difference]: Without dead ends: 1215 [2020-12-22 07:46:41,887 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 07:46:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2020-12-22 07:46:41,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1213. [2020-12-22 07:46:41,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1213 states. [2020-12-22 07:46:41,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2116 transitions. [2020-12-22 07:46:41,950 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2116 transitions. Word has length 221 [2020-12-22 07:46:41,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:41,951 INFO L481 AbstractCegarLoop]: Abstraction has 1213 states and 2116 transitions. [2020-12-22 07:46:41,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:46:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2116 transitions. [2020-12-22 07:46:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:46:41,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:41,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:46:41,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:46:41,962 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash -674300039, now seen corresponding path program 1 times [2020-12-22 07:46:41,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:41,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851974269] [2020-12-22 07:46:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:46:42,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851974269] [2020-12-22 07:46:42,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:42,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:42,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267813510] [2020-12-22 07:46:42,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:42,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:42,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:42,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:42,370 INFO L87 Difference]: Start difference. First operand 1213 states and 2116 transitions. Second operand 3 states. [2020-12-22 07:46:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:42,456 INFO L93 Difference]: Finished difference Result 2489 states and 4318 transitions. [2020-12-22 07:46:42,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:46:42,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2020-12-22 07:46:42,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:42,474 INFO L225 Difference]: With dead ends: 2489 [2020-12-22 07:46:42,474 INFO L226 Difference]: Without dead ends: 1827 [2020-12-22 07:46:42,476 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 07:46:42,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2020-12-22 07:46:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1825. [2020-12-22 07:46:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1825 states. [2020-12-22 07:46:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 3168 transitions. [2020-12-22 07:46:42,543 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 3168 transitions. Word has length 225 [2020-12-22 07:46:42,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:42,543 INFO L481 AbstractCegarLoop]: Abstraction has 1825 states and 3168 transitions. [2020-12-22 07:46:42,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:46:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 3168 transitions. [2020-12-22 07:46:42,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-12-22 07:46:42,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:42,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:46:42,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:46:42,550 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:42,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:42,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1433109345, now seen corresponding path program 1 times [2020-12-22 07:46:42,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:42,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159717865] [2020-12-22 07:46:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:42,850 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 07:46:42,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159717865] [2020-12-22 07:46:42,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:42,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:42,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764978847] [2020-12-22 07:46:42,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:42,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:42,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:42,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:42,854 INFO L87 Difference]: Start difference. First operand 1825 states and 3168 transitions. Second operand 3 states. [2020-12-22 07:46:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:42,938 INFO L93 Difference]: Finished difference Result 4277 states and 7386 transitions. [2020-12-22 07:46:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:46:42,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 229 [2020-12-22 07:46:42,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:42,957 INFO L225 Difference]: With dead ends: 4277 [2020-12-22 07:46:42,957 INFO L226 Difference]: Without dead ends: 3003 [2020-12-22 07:46:42,961 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 07:46:42,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2020-12-22 07:46:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 3001. [2020-12-22 07:46:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3001 states. [2020-12-22 07:46:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3001 states to 3001 states and 5180 transitions. [2020-12-22 07:46:43,074 INFO L78 Accepts]: Start accepts. Automaton has 3001 states and 5180 transitions. Word has length 229 [2020-12-22 07:46:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:43,074 INFO L481 AbstractCegarLoop]: Abstraction has 3001 states and 5180 transitions. [2020-12-22 07:46:43,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:46:43,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3001 states and 5180 transitions. [2020-12-22 07:46:43,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:46:43,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:43,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:46:43,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:46:43,082 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:43,083 INFO L82 PathProgramCache]: Analyzing trace with hash 792603401, now seen corresponding path program 1 times [2020-12-22 07:46:43,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:43,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482321568] [2020-12-22 07:46:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:43,402 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 07:46:43,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482321568] [2020-12-22 07:46:43,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:43,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:43,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91334425] [2020-12-22 07:46:43,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:43,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:43,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:43,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:43,406 INFO L87 Difference]: Start difference. First operand 3001 states and 5180 transitions. Second operand 3 states. [2020-12-22 07:46:43,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:43,514 INFO L93 Difference]: Finished difference Result 7709 states and 13246 transitions. [2020-12-22 07:46:43,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:46:43,515 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:46:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:43,543 INFO L225 Difference]: With dead ends: 7709 [2020-12-22 07:46:43,543 INFO L226 Difference]: Without dead ends: 5259 [2020-12-22 07:46:43,552 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 07:46:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2020-12-22 07:46:43,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5257. [2020-12-22 07:46:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5257 states. [2020-12-22 07:46:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 9020 transitions. [2020-12-22 07:46:43,743 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 9020 transitions. Word has length 233 [2020-12-22 07:46:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:43,743 INFO L481 AbstractCegarLoop]: Abstraction has 5257 states and 9020 transitions. [2020-12-22 07:46:43,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:46:43,744 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 9020 transitions. [2020-12-22 07:46:43,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 07:46:43,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:43,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:46:43,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:46:43,751 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:43,753 INFO L82 PathProgramCache]: Analyzing trace with hash 108066417, now seen corresponding path program 1 times [2020-12-22 07:46:43,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:43,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141932420] [2020-12-22 07:46:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:44,093 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 07:46:44,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141932420] [2020-12-22 07:46:44,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:44,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:46:44,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497524300] [2020-12-22 07:46:44,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:46:44,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:44,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:46:44,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:46:44,096 INFO L87 Difference]: Start difference. First operand 5257 states and 9020 transitions. Second operand 7 states. [2020-12-22 07:46:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:45,095 INFO L93 Difference]: Finished difference Result 29451 states and 50645 transitions. [2020-12-22 07:46:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:46:45,096 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 237 [2020-12-22 07:46:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:45,216 INFO L225 Difference]: With dead ends: 29451 [2020-12-22 07:46:45,217 INFO L226 Difference]: Without dead ends: 24745 [2020-12-22 07:46:45,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:46:45,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24745 states. [2020-12-22 07:46:45,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24745 to 12119. [2020-12-22 07:46:45,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12119 states. [2020-12-22 07:46:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12119 states to 12119 states and 20806 transitions. [2020-12-22 07:46:45,756 INFO L78 Accepts]: Start accepts. Automaton has 12119 states and 20806 transitions. Word has length 237 [2020-12-22 07:46:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:45,756 INFO L481 AbstractCegarLoop]: Abstraction has 12119 states and 20806 transitions. [2020-12-22 07:46:45,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:46:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 12119 states and 20806 transitions. [2020-12-22 07:46:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-12-22 07:46:45,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:45,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:46:45,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:46:45,772 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:45,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:45,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1083679653, now seen corresponding path program 1 times [2020-12-22 07:46:45,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:45,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224506674] [2020-12-22 07:46:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:46,147 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 07:46:46,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224506674] [2020-12-22 07:46:46,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:46,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:46:46,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939378664] [2020-12-22 07:46:46,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:46:46,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:46,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:46:46,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:46:46,158 INFO L87 Difference]: Start difference. First operand 12119 states and 20806 transitions. Second operand 4 states. [2020-12-22 07:46:46,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:46,599 INFO L93 Difference]: Finished difference Result 28489 states and 48934 transitions. [2020-12-22 07:46:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:46:46,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 238 [2020-12-22 07:46:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:46,646 INFO L225 Difference]: With dead ends: 28489 [2020-12-22 07:46:46,647 INFO L226 Difference]: Without dead ends: 16921 [2020-12-22 07:46:46,666 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 07:46:46,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16921 states. [2020-12-22 07:46:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16921 to 16886. [2020-12-22 07:46:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16886 states. [2020-12-22 07:46:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16886 states to 16886 states and 28973 transitions. [2020-12-22 07:46:47,325 INFO L78 Accepts]: Start accepts. Automaton has 16886 states and 28973 transitions. Word has length 238 [2020-12-22 07:46:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:47,326 INFO L481 AbstractCegarLoop]: Abstraction has 16886 states and 28973 transitions. [2020-12-22 07:46:47,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:46:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 16886 states and 28973 transitions. [2020-12-22 07:46:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:46:47,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:47,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:46:47,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:46:47,342 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:47,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:47,343 INFO L82 PathProgramCache]: Analyzing trace with hash 786829641, now seen corresponding path program 1 times [2020-12-22 07:46:47,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:47,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584504441] [2020-12-22 07:46:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:47,575 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 07:46:47,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584504441] [2020-12-22 07:46:47,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:47,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:47,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472929950] [2020-12-22 07:46:47,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:47,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:47,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:47,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:47,577 INFO L87 Difference]: Start difference. First operand 16886 states and 28973 transitions. Second operand 3 states. [2020-12-22 07:46:48,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:48,173 INFO L93 Difference]: Finished difference Result 38641 states and 66428 transitions. [2020-12-22 07:46:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:46:48,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 07:46:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:48,249 INFO L225 Difference]: With dead ends: 38641 [2020-12-22 07:46:48,249 INFO L226 Difference]: Without dead ends: 26610 [2020-12-22 07:46:48,271 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 07:46:48,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26610 states. [2020-12-22 07:46:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26610 to 26608. [2020-12-22 07:46:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26608 states. [2020-12-22 07:46:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26608 states to 26608 states and 45586 transitions. [2020-12-22 07:46:49,299 INFO L78 Accepts]: Start accepts. Automaton has 26608 states and 45586 transitions. Word has length 239 [2020-12-22 07:46:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:49,300 INFO L481 AbstractCegarLoop]: Abstraction has 26608 states and 45586 transitions. [2020-12-22 07:46:49,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:46:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 26608 states and 45586 transitions. [2020-12-22 07:46:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:46:49,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:49,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:49,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:46:49,307 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:49,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:49,308 INFO L82 PathProgramCache]: Analyzing trace with hash -259310295, now seen corresponding path program 1 times [2020-12-22 07:46:49,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:49,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74066252] [2020-12-22 07:46:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:49,533 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 07:46:49,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74066252] [2020-12-22 07:46:49,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:49,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:49,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908386616] [2020-12-22 07:46:49,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:49,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:49,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:49,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:49,538 INFO L87 Difference]: Start difference. First operand 26608 states and 45586 transitions. Second operand 3 states. [2020-12-22 07:46:50,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:50,390 INFO L93 Difference]: Finished difference Result 51528 states and 88309 transitions. [2020-12-22 07:46:50,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:46:50,391 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 07:46:50,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:50,489 INFO L225 Difference]: With dead ends: 51528 [2020-12-22 07:46:50,489 INFO L226 Difference]: Without dead ends: 37638 [2020-12-22 07:46:50,505 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 07:46:50,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37638 states. [2020-12-22 07:46:51,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37638 to 37636. [2020-12-22 07:46:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37636 states. [2020-12-22 07:46:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37636 states to 37636 states and 64322 transitions. [2020-12-22 07:46:51,820 INFO L78 Accepts]: Start accepts. Automaton has 37636 states and 64322 transitions. Word has length 239 [2020-12-22 07:46:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:51,821 INFO L481 AbstractCegarLoop]: Abstraction has 37636 states and 64322 transitions. [2020-12-22 07:46:51,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:46:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 37636 states and 64322 transitions. [2020-12-22 07:46:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:46:51,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:51,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:46:51,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:46:51,828 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:51,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1955219721, now seen corresponding path program 1 times [2020-12-22 07:46:51,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:51,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60648031] [2020-12-22 07:46:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:52,276 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 07:46:52,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60648031] [2020-12-22 07:46:52,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:52,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:52,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660844728] [2020-12-22 07:46:52,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:52,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:52,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:52,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:52,279 INFO L87 Difference]: Start difference. First operand 37636 states and 64322 transitions. Second operand 3 states. [2020-12-22 07:46:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:53,129 INFO L93 Difference]: Finished difference Result 72700 states and 124309 transitions. [2020-12-22 07:46:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:46:53,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 07:46:53,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:53,289 INFO L225 Difference]: With dead ends: 72700 [2020-12-22 07:46:53,289 INFO L226 Difference]: Without dead ends: 53018 [2020-12-22 07:46:53,327 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 07:46:53,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53018 states. [2020-12-22 07:46:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53018 to 53016. [2020-12-22 07:46:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53016 states. [2020-12-22 07:46:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53016 states to 53016 states and 90370 transitions. [2020-12-22 07:46:55,383 INFO L78 Accepts]: Start accepts. Automaton has 53016 states and 90370 transitions. Word has length 239 [2020-12-22 07:46:55,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:55,384 INFO L481 AbstractCegarLoop]: Abstraction has 53016 states and 90370 transitions. [2020-12-22 07:46:55,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:46:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 53016 states and 90370 transitions. [2020-12-22 07:46:55,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:46:55,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:55,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:46:55,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:46:55,389 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:55,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:55,390 INFO L82 PathProgramCache]: Analyzing trace with hash 583218409, now seen corresponding path program 1 times [2020-12-22 07:46:55,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:55,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290973483] [2020-12-22 07:46:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:55,733 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 07:46:55,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290973483] [2020-12-22 07:46:55,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:55,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:55,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227442404] [2020-12-22 07:46:55,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:55,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:55,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:55,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:55,737 INFO L87 Difference]: Start difference. First operand 53016 states and 90370 transitions. Second operand 3 states. [2020-12-22 07:46:56,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:56,998 INFO L93 Difference]: Finished difference Result 102144 states and 174213 transitions. [2020-12-22 07:46:56,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:46:56,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 07:46:56,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:57,164 INFO L225 Difference]: With dead ends: 102144 [2020-12-22 07:46:57,165 INFO L226 Difference]: Without dead ends: 74350 [2020-12-22 07:46:57,191 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 07:46:57,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74350 states. [2020-12-22 07:46:59,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74350 to 74348. [2020-12-22 07:46:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74348 states. [2020-12-22 07:46:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74348 states to 74348 states and 126366 transitions. [2020-12-22 07:46:59,395 INFO L78 Accepts]: Start accepts. Automaton has 74348 states and 126366 transitions. Word has length 239 [2020-12-22 07:46:59,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:59,396 INFO L481 AbstractCegarLoop]: Abstraction has 74348 states and 126366 transitions. [2020-12-22 07:46:59,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:46:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 74348 states and 126366 transitions. [2020-12-22 07:46:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:46:59,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:59,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:46:59,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:46:59,401 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:59,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1125515465, now seen corresponding path program 1 times [2020-12-22 07:46:59,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:59,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287073367] [2020-12-22 07:46:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:59,871 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 07:46:59,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287073367] [2020-12-22 07:46:59,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:59,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:59,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83070728] [2020-12-22 07:46:59,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:59,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:59,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:59,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:59,874 INFO L87 Difference]: Start difference. First operand 74348 states and 126366 transitions. Second operand 3 states. [2020-12-22 07:47:01,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:47:01,544 INFO L93 Difference]: Finished difference Result 142844 states and 242933 transitions. [2020-12-22 07:47:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:47:01,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 07:47:01,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:47:01,753 INFO L225 Difference]: With dead ends: 142844 [2020-12-22 07:47:01,753 INFO L226 Difference]: Without dead ends: 103746 [2020-12-22 07:47:01,817 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 07:47:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103746 states. [2020-12-22 07:47:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103746 to 103744. [2020-12-22 07:47:04,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103744 states. [2020-12-22 07:47:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103744 states to 103744 states and 175754 transitions. [2020-12-22 07:47:04,374 INFO L78 Accepts]: Start accepts. Automaton has 103744 states and 175754 transitions. Word has length 239 [2020-12-22 07:47:04,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:47:04,375 INFO L481 AbstractCegarLoop]: Abstraction has 103744 states and 175754 transitions. [2020-12-22 07:47:04,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:47:04,375 INFO L276 IsEmpty]: Start isEmpty. Operand 103744 states and 175754 transitions. [2020-12-22 07:47:04,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:47:04,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:47:04,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:47:04,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:47:04,378 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:47:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:47:04,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1431923240, now seen corresponding path program 1 times [2020-12-22 07:47:04,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:47:04,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202619927] [2020-12-22 07:47:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:47:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:47:04,816 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 07:47:04,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202619927] [2020-12-22 07:47:04,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:47:04,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:47:04,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640356005] [2020-12-22 07:47:04,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:47:04,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:47:04,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:47:04,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:47:04,825 INFO L87 Difference]: Start difference. First operand 103744 states and 175754 transitions. Second operand 4 states. [2020-12-22 07:47:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:47:08,313 INFO L93 Difference]: Finished difference Result 342691 states and 580953 transitions. [2020-12-22 07:47:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:47:08,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 239 [2020-12-22 07:47:08,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:47:08,977 INFO L225 Difference]: With dead ends: 342691 [2020-12-22 07:47:08,977 INFO L226 Difference]: Without dead ends: 239580 [2020-12-22 07:47:09,113 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 07:47:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239580 states. [2020-12-22 07:47:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239580 to 170785. [2020-12-22 07:47:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170785 states. [2020-12-22 07:47:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170785 states to 170785 states and 288495 transitions. [2020-12-22 07:47:13,693 INFO L78 Accepts]: Start accepts. Automaton has 170785 states and 288495 transitions. Word has length 239 [2020-12-22 07:47:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:47:13,694 INFO L481 AbstractCegarLoop]: Abstraction has 170785 states and 288495 transitions. [2020-12-22 07:47:13,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:47:13,694 INFO L276 IsEmpty]: Start isEmpty. Operand 170785 states and 288495 transitions. [2020-12-22 07:47:13,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-22 07:47:13,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:47:13,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:47:13,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:47:13,697 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:47:13,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:47:13,698 INFO L82 PathProgramCache]: Analyzing trace with hash -488423108, now seen corresponding path program 1 times [2020-12-22 07:47:13,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:47:13,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248736294] [2020-12-22 07:47:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:47:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:47:14,240 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 07:47:14,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248736294] [2020-12-22 07:47:14,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:47:14,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:47:14,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062393922] [2020-12-22 07:47:14,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:47:14,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:47:14,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:47:14,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:47:14,255 INFO L87 Difference]: Start difference. First operand 170785 states and 288495 transitions. Second operand 4 states. [2020-12-22 07:47:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:47:20,120 INFO L93 Difference]: Finished difference Result 564619 states and 954453 transitions. [2020-12-22 07:47:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:47:20,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 240 [2020-12-22 07:47:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:47:21,166 INFO L225 Difference]: With dead ends: 564619 [2020-12-22 07:47:21,167 INFO L226 Difference]: Without dead ends: 394467 [2020-12-22 07:47:21,334 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 07:47:21,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394467 states. [2020-12-22 07:47:27,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394467 to 280466. [2020-12-22 07:47:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280466 states. [2020-12-22 07:47:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280466 states to 280466 states and 472408 transitions. [2020-12-22 07:47:28,992 INFO L78 Accepts]: Start accepts. Automaton has 280466 states and 472408 transitions. Word has length 240 [2020-12-22 07:47:28,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:47:28,993 INFO L481 AbstractCegarLoop]: Abstraction has 280466 states and 472408 transitions. [2020-12-22 07:47:28,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:47:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 280466 states and 472408 transitions. [2020-12-22 07:47:28,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 07:47:28,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:47:28,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:47:28,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:47:28,996 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:47:28,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:47:28,996 INFO L82 PathProgramCache]: Analyzing trace with hash 279386591, now seen corresponding path program 1 times [2020-12-22 07:47:28,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:47:28,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523869538] [2020-12-22 07:47:28,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:47:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:47:29,187 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 07:47:29,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523869538] [2020-12-22 07:47:29,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:47:29,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:47:29,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994504814] [2020-12-22 07:47:29,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:47:29,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:47:29,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:47:29,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:47:29,190 INFO L87 Difference]: Start difference. First operand 280466 states and 472408 transitions. Second operand 4 states. [2020-12-22 07:47:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:47:39,831 INFO L93 Difference]: Finished difference Result 926795 states and 1562209 transitions. [2020-12-22 07:47:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:47:39,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2020-12-22 07:47:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:47:41,490 INFO L225 Difference]: With dead ends: 926795 [2020-12-22 07:47:41,490 INFO L226 Difference]: Without dead ends: 646962 [2020-12-22 07:47:41,777 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 07:47:42,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646962 states. [2020-12-22 07:47:56,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646962 to 458063. [2020-12-22 07:47:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458063 states. [2020-12-22 07:47:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458063 states to 458063 states and 769345 transitions. [2020-12-22 07:47:59,239 INFO L78 Accepts]: Start accepts. Automaton has 458063 states and 769345 transitions. Word has length 241 [2020-12-22 07:47:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:47:59,240 INFO L481 AbstractCegarLoop]: Abstraction has 458063 states and 769345 transitions. [2020-12-22 07:47:59,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:47:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand 458063 states and 769345 transitions. [2020-12-22 07:47:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 07:47:59,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:47:59,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:47:59,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:47:59,264 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:47:59,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:47:59,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1519312173, now seen corresponding path program 1 times [2020-12-22 07:47:59,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:47:59,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207046842] [2020-12-22 07:47:59,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:47:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:48:00,120 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 07:48:00,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207046842] [2020-12-22 07:48:00,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:48:00,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:48:00,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763606820] [2020-12-22 07:48:00,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:48:00,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:48:00,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:48:00,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:48:00,125 INFO L87 Difference]: Start difference. First operand 458063 states and 769345 transitions. Second operand 4 states. [2020-12-22 07:48:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:48:19,366 INFO L93 Difference]: Finished difference Result 1482429 states and 2491923 transitions. [2020-12-22 07:48:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:48:19,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 242 [2020-12-22 07:48:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:48:22,366 INFO L225 Difference]: With dead ends: 1482429 [2020-12-22 07:48:22,366 INFO L226 Difference]: Without dead ends: 1024999 [2020-12-22 07:48:22,867 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 07:48:24,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024999 states. [2020-12-22 07:48:51,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024999 to 740164. [2020-12-22 07:48:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 740164 states. [2020-12-22 07:48:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740164 states to 740164 states and 1239686 transitions. [2020-12-22 07:48:54,816 INFO L78 Accepts]: Start accepts. Automaton has 740164 states and 1239686 transitions. Word has length 242 [2020-12-22 07:48:54,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:48:54,817 INFO L481 AbstractCegarLoop]: Abstraction has 740164 states and 1239686 transitions. [2020-12-22 07:48:54,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:48:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 740164 states and 1239686 transitions. [2020-12-22 07:48:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-22 07:48:54,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:48:54,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:48:54,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:48:54,833 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:48:54,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:48:54,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2074853333, now seen corresponding path program 1 times [2020-12-22 07:48:54,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:48:54,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836947211] [2020-12-22 07:48:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:48:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:48:55,274 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 07:48:55,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836947211] [2020-12-22 07:48:55,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:48:55,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:48:55,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828174626] [2020-12-22 07:48:55,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:48:55,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:48:55,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:48:55,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:48:55,277 INFO L87 Difference]: Start difference. First operand 740164 states and 1239686 transitions. Second operand 7 states. [2020-12-22 07:49:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:49:21,522 INFO L93 Difference]: Finished difference Result 1479699 states and 2478273 transitions. [2020-12-22 07:49:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:49:21,522 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 244 [2020-12-22 07:49:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:49:24,142 INFO L225 Difference]: With dead ends: 1479699 [2020-12-22 07:49:24,157 INFO L226 Difference]: Without dead ends: 740168 [2020-12-22 07:49:25,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:49:26,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740168 states.