/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:05:41,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:05:41,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:05:41,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:05:41,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:05:41,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:05:41,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:05:41,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:05:41,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:05:41,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:05:41,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:05:41,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:05:41,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:05:41,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:05:41,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:05:41,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:05:41,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:05:41,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:05:41,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:05:41,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:05:41,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:05:41,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:05:41,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:05:41,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:05:41,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:05:41,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:05:41,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:05:41,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:05:41,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:05:41,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:05:41,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:05:41,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:05:41,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:05:41,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:05:41,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:05:41,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:05:41,713 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:05:41,762 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:05:41,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:05:41,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:05:41,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:05:41,768 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:05:41,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:05:41,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:05:41,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:05:41,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:05:41,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:05:41,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:05:41,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:05:41,772 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:05:41,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:05:41,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:05:41,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:05:41,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:05:41,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:05:41,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:05:41,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:05:41,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:05:41,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:05:41,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:05:41,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:05:41,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:05:41,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:05:42,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:05:42,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:05:42,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:05:42,244 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:05:42,250 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:05:42,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 09:05:42,325 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23cc8d793/78dc3c9f117e47bead71078ee79bf0bf/FLAGdb1cf9412 [2020-12-22 09:05:43,047 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:05:43,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 09:05:43,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23cc8d793/78dc3c9f117e47bead71078ee79bf0bf/FLAGdb1cf9412 [2020-12-22 09:05:43,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23cc8d793/78dc3c9f117e47bead71078ee79bf0bf [2020-12-22 09:05:43,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:05:43,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:05:43,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:05:43,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:05:43,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:05:43,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:05:43" (1/1) ... [2020-12-22 09:05:43,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a7f0376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:43, skipping insertion in model container [2020-12-22 09:05:43,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:05:43" (1/1) ... [2020-12-22 09:05:43,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:05:43,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:05:43,836 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12934,12947] [2020-12-22 09:05:43,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:05:43,955 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:05:44,100 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12934,12947] [2020-12-22 09:05:44,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:05:44,241 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:05:44,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:44 WrapperNode [2020-12-22 09:05:44,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:05:44,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:05:44,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:05:44,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:05:44,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:44" (1/1) ... [2020-12-22 09:05:44,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:44" (1/1) ... [2020-12-22 09:05:44,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:05:44,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:05:44,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:05:44,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:05:44,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:44" (1/1) ... [2020-12-22 09:05:44,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:44" (1/1) ... [2020-12-22 09:05:44,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:44" (1/1) ... [2020-12-22 09:05:44,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:44" (1/1) ... [2020-12-22 09:05:44,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:44" (1/1) ... [2020-12-22 09:05:44,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:44" (1/1) ... [2020-12-22 09:05:44,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:44" (1/1) ... [2020-12-22 09:05:44,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:05:44,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:05:44,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:05:44,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:05:44,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:05:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:05:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:05:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:05:44,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:05:46,367 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:05:46,368 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:05:46,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:05:46 BoogieIcfgContainer [2020-12-22 09:05:46,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:05:46,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:05:46,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:05:46,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:05:46,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:05:43" (1/3) ... [2020-12-22 09:05:46,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208986d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:05:46, skipping insertion in model container [2020-12-22 09:05:46,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:44" (2/3) ... [2020-12-22 09:05:46,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208986d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:05:46, skipping insertion in model container [2020-12-22 09:05:46,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:05:46" (3/3) ... [2020-12-22 09:05:46,381 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 09:05:46,388 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:05:46,395 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:05:46,415 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:05:46,447 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:05:46,447 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:05:46,447 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:05:46,447 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:05:46,447 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:05:46,447 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:05:46,448 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:05:46,448 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:05:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states. [2020-12-22 09:05:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 09:05:46,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:46,498 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] [2020-12-22 09:05:46,498 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash 767655198, now seen corresponding path program 1 times [2020-12-22 09:05:46,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:46,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745418352] [2020-12-22 09:05:46,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:47,120 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 09:05:47,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745418352] [2020-12-22 09:05:47,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:47,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:47,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134809417] [2020-12-22 09:05:47,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:47,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:47,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:47,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:47,156 INFO L87 Difference]: Start difference. First operand 330 states. Second operand 3 states. [2020-12-22 09:05:47,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:47,347 INFO L93 Difference]: Finished difference Result 616 states and 1067 transitions. [2020-12-22 09:05:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:47,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 09:05:47,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:47,369 INFO L225 Difference]: With dead ends: 616 [2020-12-22 09:05:47,369 INFO L226 Difference]: Without dead ends: 461 [2020-12-22 09:05:47,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:47,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-12-22 09:05:47,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 459. [2020-12-22 09:05:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-12-22 09:05:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 767 transitions. [2020-12-22 09:05:47,461 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 767 transitions. Word has length 106 [2020-12-22 09:05:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:47,462 INFO L481 AbstractCegarLoop]: Abstraction has 459 states and 767 transitions. [2020-12-22 09:05:47,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 767 transitions. [2020-12-22 09:05:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 09:05:47,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:47,468 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] [2020-12-22 09:05:47,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:05:47,468 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:47,469 INFO L82 PathProgramCache]: Analyzing trace with hash -383361066, now seen corresponding path program 1 times [2020-12-22 09:05:47,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:47,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550921665] [2020-12-22 09:05:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:47,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550921665] [2020-12-22 09:05:47,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:47,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:47,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138260308] [2020-12-22 09:05:47,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:47,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:47,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:47,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:47,741 INFO L87 Difference]: Start difference. First operand 459 states and 767 transitions. Second operand 3 states. [2020-12-22 09:05:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:47,819 INFO L93 Difference]: Finished difference Result 995 states and 1663 transitions. [2020-12-22 09:05:47,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:47,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2020-12-22 09:05:47,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:47,826 INFO L225 Difference]: With dead ends: 995 [2020-12-22 09:05:47,826 INFO L226 Difference]: Without dead ends: 717 [2020-12-22 09:05:47,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:47,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2020-12-22 09:05:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2020-12-22 09:05:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2020-12-22 09:05:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1194 transitions. [2020-12-22 09:05:47,882 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1194 transitions. Word has length 109 [2020-12-22 09:05:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:47,883 INFO L481 AbstractCegarLoop]: Abstraction has 715 states and 1194 transitions. [2020-12-22 09:05:47,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:47,884 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1194 transitions. [2020-12-22 09:05:47,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:05:47,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:47,891 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] [2020-12-22 09:05:47,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:05:47,892 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:47,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:47,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1484591587, now seen corresponding path program 1 times [2020-12-22 09:05:47,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:47,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301777292] [2020-12-22 09:05:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:48,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301777292] [2020-12-22 09:05:48,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:48,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:48,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146215176] [2020-12-22 09:05:48,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:48,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:48,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:48,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:48,017 INFO L87 Difference]: Start difference. First operand 715 states and 1194 transitions. Second operand 3 states. [2020-12-22 09:05:48,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:48,082 INFO L93 Difference]: Finished difference Result 1743 states and 2908 transitions. [2020-12-22 09:05:48,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:48,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 09:05:48,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:48,090 INFO L225 Difference]: With dead ends: 1743 [2020-12-22 09:05:48,091 INFO L226 Difference]: Without dead ends: 1209 [2020-12-22 09:05:48,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2020-12-22 09:05:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1207. [2020-12-22 09:05:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1207 states. [2020-12-22 09:05:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2010 transitions. [2020-12-22 09:05:48,145 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2010 transitions. Word has length 112 [2020-12-22 09:05:48,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:48,145 INFO L481 AbstractCegarLoop]: Abstraction has 1207 states and 2010 transitions. [2020-12-22 09:05:48,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:48,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2010 transitions. [2020-12-22 09:05:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 09:05:48,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:48,149 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] [2020-12-22 09:05:48,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:05:48,150 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:48,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2071299369, now seen corresponding path program 1 times [2020-12-22 09:05:48,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:48,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697837072] [2020-12-22 09:05:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:48,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697837072] [2020-12-22 09:05:48,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:48,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:48,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323232946] [2020-12-22 09:05:48,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:48,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:48,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:48,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:48,341 INFO L87 Difference]: Start difference. First operand 1207 states and 2010 transitions. Second operand 3 states. [2020-12-22 09:05:48,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:48,438 INFO L93 Difference]: Finished difference Result 3179 states and 5284 transitions. [2020-12-22 09:05:48,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:48,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-12-22 09:05:48,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:48,455 INFO L225 Difference]: With dead ends: 3179 [2020-12-22 09:05:48,455 INFO L226 Difference]: Without dead ends: 2153 [2020-12-22 09:05:48,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2020-12-22 09:05:48,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 2151. [2020-12-22 09:05:48,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2151 states. [2020-12-22 09:05:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 3566 transitions. [2020-12-22 09:05:48,552 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 3566 transitions. Word has length 115 [2020-12-22 09:05:48,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:48,554 INFO L481 AbstractCegarLoop]: Abstraction has 2151 states and 3566 transitions. [2020-12-22 09:05:48,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:48,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 3566 transitions. [2020-12-22 09:05:48,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 09:05:48,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:48,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:48,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:05:48,558 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:48,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:48,559 INFO L82 PathProgramCache]: Analyzing trace with hash 895641604, now seen corresponding path program 1 times [2020-12-22 09:05:48,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:48,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357965758] [2020-12-22 09:05:48,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:48,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357965758] [2020-12-22 09:05:48,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:48,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:05:48,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216211116] [2020-12-22 09:05:48,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:05:48,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:48,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:05:48,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:05:48,822 INFO L87 Difference]: Start difference. First operand 2151 states and 3566 transitions. Second operand 6 states. [2020-12-22 09:05:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:49,560 INFO L93 Difference]: Finished difference Result 8217 states and 13679 transitions. [2020-12-22 09:05:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:05:49,560 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2020-12-22 09:05:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:49,600 INFO L225 Difference]: With dead ends: 8217 [2020-12-22 09:05:49,601 INFO L226 Difference]: Without dead ends: 6247 [2020-12-22 09:05:49,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:05:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6247 states. [2020-12-22 09:05:50,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6247 to 4913. [2020-12-22 09:05:50,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4913 states. [2020-12-22 09:05:50,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4913 states to 4913 states and 8151 transitions. [2020-12-22 09:05:50,041 INFO L78 Accepts]: Start accepts. Automaton has 4913 states and 8151 transitions. Word has length 118 [2020-12-22 09:05:50,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:50,042 INFO L481 AbstractCegarLoop]: Abstraction has 4913 states and 8151 transitions. [2020-12-22 09:05:50,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:05:50,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4913 states and 8151 transitions. [2020-12-22 09:05:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 09:05:50,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:50,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:50,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:05:50,047 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:50,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:50,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1928023900, now seen corresponding path program 1 times [2020-12-22 09:05:50,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:50,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639418380] [2020-12-22 09:05:50,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:50,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639418380] [2020-12-22 09:05:50,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:50,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:50,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662699095] [2020-12-22 09:05:50,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:50,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:50,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:50,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:50,214 INFO L87 Difference]: Start difference. First operand 4913 states and 8151 transitions. Second operand 4 states. [2020-12-22 09:05:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:50,809 INFO L93 Difference]: Finished difference Result 12805 states and 21321 transitions. [2020-12-22 09:05:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:50,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-12-22 09:05:50,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:50,859 INFO L225 Difference]: With dead ends: 12805 [2020-12-22 09:05:50,859 INFO L226 Difference]: Without dead ends: 8073 [2020-12-22 09:05:50,870 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 09:05:50,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8073 states. [2020-12-22 09:05:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8073 to 7257. [2020-12-22 09:05:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7257 states. [2020-12-22 09:05:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7257 states to 7257 states and 12054 transitions. [2020-12-22 09:05:51,400 INFO L78 Accepts]: Start accepts. Automaton has 7257 states and 12054 transitions. Word has length 119 [2020-12-22 09:05:51,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:51,401 INFO L481 AbstractCegarLoop]: Abstraction has 7257 states and 12054 transitions. [2020-12-22 09:05:51,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 7257 states and 12054 transitions. [2020-12-22 09:05:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 09:05:51,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:51,407 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] [2020-12-22 09:05:51,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:05:51,408 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:51,408 INFO L82 PathProgramCache]: Analyzing trace with hash -230071643, now seen corresponding path program 1 times [2020-12-22 09:05:51,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:51,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861816099] [2020-12-22 09:05:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:51,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861816099] [2020-12-22 09:05:51,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:51,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:51,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241037260] [2020-12-22 09:05:51,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:51,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:51,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:51,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:51,521 INFO L87 Difference]: Start difference. First operand 7257 states and 12054 transitions. Second operand 3 states. [2020-12-22 09:05:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:52,087 INFO L93 Difference]: Finished difference Result 16029 states and 26743 transitions. [2020-12-22 09:05:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:52,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-22 09:05:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:52,164 INFO L225 Difference]: With dead ends: 16029 [2020-12-22 09:05:52,164 INFO L226 Difference]: Without dead ends: 11083 [2020-12-22 09:05:52,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11083 states. [2020-12-22 09:05:52,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11083 to 11081. [2020-12-22 09:05:52,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11081 states. [2020-12-22 09:05:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11081 states to 11081 states and 18409 transitions. [2020-12-22 09:05:52,888 INFO L78 Accepts]: Start accepts. Automaton has 11081 states and 18409 transitions. Word has length 120 [2020-12-22 09:05:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:52,888 INFO L481 AbstractCegarLoop]: Abstraction has 11081 states and 18409 transitions. [2020-12-22 09:05:52,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 11081 states and 18409 transitions. [2020-12-22 09:05:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 09:05:52,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:52,891 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] [2020-12-22 09:05:52,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:05:52,892 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:52,892 INFO L82 PathProgramCache]: Analyzing trace with hash -93787815, now seen corresponding path program 1 times [2020-12-22 09:05:52,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:52,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815672420] [2020-12-22 09:05:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:53,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815672420] [2020-12-22 09:05:53,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:53,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:53,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601342743] [2020-12-22 09:05:53,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:53,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:53,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:53,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:53,071 INFO L87 Difference]: Start difference. First operand 11081 states and 18409 transitions. Second operand 3 states. [2020-12-22 09:05:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:53,911 INFO L93 Difference]: Finished difference Result 21668 states and 36034 transitions. [2020-12-22 09:05:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:53,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-22 09:05:53,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:53,959 INFO L225 Difference]: With dead ends: 21668 [2020-12-22 09:05:53,960 INFO L226 Difference]: Without dead ends: 15654 [2020-12-22 09:05:53,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15654 states. [2020-12-22 09:05:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15654 to 15652. [2020-12-22 09:05:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15652 states. [2020-12-22 09:05:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15652 states to 15652 states and 25940 transitions. [2020-12-22 09:05:54,877 INFO L78 Accepts]: Start accepts. Automaton has 15652 states and 25940 transitions. Word has length 120 [2020-12-22 09:05:54,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:54,879 INFO L481 AbstractCegarLoop]: Abstraction has 15652 states and 25940 transitions. [2020-12-22 09:05:54,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:54,879 INFO L276 IsEmpty]: Start isEmpty. Operand 15652 states and 25940 transitions. [2020-12-22 09:05:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 09:05:54,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:54,882 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] [2020-12-22 09:05:54,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:05:54,882 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:54,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:54,883 INFO L82 PathProgramCache]: Analyzing trace with hash -423305269, now seen corresponding path program 1 times [2020-12-22 09:05:54,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:54,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84708236] [2020-12-22 09:05:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:55,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84708236] [2020-12-22 09:05:55,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:55,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:55,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533634005] [2020-12-22 09:05:55,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:55,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:55,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:55,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:55,030 INFO L87 Difference]: Start difference. First operand 15652 states and 25940 transitions. Second operand 4 states. [2020-12-22 09:05:56,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:56,334 INFO L93 Difference]: Finished difference Result 41418 states and 68781 transitions. [2020-12-22 09:05:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:56,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2020-12-22 09:05:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:56,416 INFO L225 Difference]: With dead ends: 41418 [2020-12-22 09:05:56,417 INFO L226 Difference]: Without dead ends: 26008 [2020-12-22 09:05:56,448 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 09:05:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26008 states. [2020-12-22 09:05:57,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26008 to 23291. [2020-12-22 09:05:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23291 states. [2020-12-22 09:05:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23291 states to 23291 states and 38526 transitions. [2020-12-22 09:05:57,902 INFO L78 Accepts]: Start accepts. Automaton has 23291 states and 38526 transitions. Word has length 120 [2020-12-22 09:05:57,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:57,903 INFO L481 AbstractCegarLoop]: Abstraction has 23291 states and 38526 transitions. [2020-12-22 09:05:57,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 23291 states and 38526 transitions. [2020-12-22 09:05:57,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 09:05:57,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:57,906 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] [2020-12-22 09:05:57,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:05:57,906 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:57,907 INFO L82 PathProgramCache]: Analyzing trace with hash 2090250357, now seen corresponding path program 1 times [2020-12-22 09:05:57,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:57,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430581405] [2020-12-22 09:05:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:58,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430581405] [2020-12-22 09:05:58,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:58,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:58,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465707583] [2020-12-22 09:05:58,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:58,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:58,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:58,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:58,022 INFO L87 Difference]: Start difference. First operand 23291 states and 38526 transitions. Second operand 3 states. [2020-12-22 09:05:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:59,438 INFO L93 Difference]: Finished difference Result 48419 states and 80203 transitions. [2020-12-22 09:05:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:59,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-22 09:05:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:59,536 INFO L225 Difference]: With dead ends: 48419 [2020-12-22 09:05:59,536 INFO L226 Difference]: Without dead ends: 33964 [2020-12-22 09:05:59,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33964 states. [2020-12-22 09:06:01,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33964 to 33962. [2020-12-22 09:06:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33962 states. [2020-12-22 09:06:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33962 states to 33962 states and 56011 transitions. [2020-12-22 09:06:01,256 INFO L78 Accepts]: Start accepts. Automaton has 33962 states and 56011 transitions. Word has length 120 [2020-12-22 09:06:01,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:01,256 INFO L481 AbstractCegarLoop]: Abstraction has 33962 states and 56011 transitions. [2020-12-22 09:06:01,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 33962 states and 56011 transitions. [2020-12-22 09:06:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 09:06:01,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:01,259 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] [2020-12-22 09:06:01,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:06:01,259 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:01,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:01,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1191149015, now seen corresponding path program 1 times [2020-12-22 09:06:01,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:01,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186113877] [2020-12-22 09:06:01,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:01,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186113877] [2020-12-22 09:06:01,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:01,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:01,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914812383] [2020-12-22 09:06:01,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:01,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:01,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:01,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:01,343 INFO L87 Difference]: Start difference. First operand 33962 states and 56011 transitions. Second operand 3 states. [2020-12-22 09:06:02,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:02,818 INFO L93 Difference]: Finished difference Result 74027 states and 122212 transitions. [2020-12-22 09:06:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:02,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-22 09:06:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:02,976 INFO L225 Difference]: With dead ends: 74027 [2020-12-22 09:06:02,977 INFO L226 Difference]: Without dead ends: 50501 [2020-12-22 09:06:03,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50501 states. [2020-12-22 09:06:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50501 to 50499. [2020-12-22 09:06:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50499 states. [2020-12-22 09:06:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50499 states to 50499 states and 82971 transitions. [2020-12-22 09:06:05,336 INFO L78 Accepts]: Start accepts. Automaton has 50499 states and 82971 transitions. Word has length 120 [2020-12-22 09:06:05,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:05,337 INFO L481 AbstractCegarLoop]: Abstraction has 50499 states and 82971 transitions. [2020-12-22 09:06:05,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:05,337 INFO L276 IsEmpty]: Start isEmpty. Operand 50499 states and 82971 transitions. [2020-12-22 09:06:05,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 09:06:05,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:05,339 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] [2020-12-22 09:06:05,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:06:05,339 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:05,340 INFO L82 PathProgramCache]: Analyzing trace with hash -295507453, now seen corresponding path program 1 times [2020-12-22 09:06:05,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:05,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997213581] [2020-12-22 09:06:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:05,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997213581] [2020-12-22 09:06:05,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:05,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:05,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970628162] [2020-12-22 09:06:05,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:05,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:05,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:05,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:05,439 INFO L87 Difference]: Start difference. First operand 50499 states and 82971 transitions. Second operand 4 states. [2020-12-22 09:06:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:08,604 INFO L93 Difference]: Finished difference Result 138815 states and 228435 transitions. [2020-12-22 09:06:08,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:08,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2020-12-22 09:06:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:08,810 INFO L225 Difference]: With dead ends: 138815 [2020-12-22 09:06:08,811 INFO L226 Difference]: Without dead ends: 88565 [2020-12-22 09:06:08,863 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 09:06:08,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88565 states. [2020-12-22 09:06:12,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88565 to 80092. [2020-12-22 09:06:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80092 states. [2020-12-22 09:06:12,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80092 states to 80092 states and 131194 transitions. [2020-12-22 09:06:12,443 INFO L78 Accepts]: Start accepts. Automaton has 80092 states and 131194 transitions. Word has length 121 [2020-12-22 09:06:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:12,444 INFO L481 AbstractCegarLoop]: Abstraction has 80092 states and 131194 transitions. [2020-12-22 09:06:12,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:12,444 INFO L276 IsEmpty]: Start isEmpty. Operand 80092 states and 131194 transitions. [2020-12-22 09:06:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 09:06:12,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:12,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:12,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:06:12,446 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash -624184430, now seen corresponding path program 1 times [2020-12-22 09:06:12,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:12,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530587712] [2020-12-22 09:06:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:12,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530587712] [2020-12-22 09:06:12,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:12,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:12,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763847319] [2020-12-22 09:06:12,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:12,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:12,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:12,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:12,562 INFO L87 Difference]: Start difference. First operand 80092 states and 131194 transitions. Second operand 4 states. [2020-12-22 09:06:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:18,128 INFO L93 Difference]: Finished difference Result 236507 states and 387421 transitions. [2020-12-22 09:06:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:18,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2020-12-22 09:06:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:18,490 INFO L225 Difference]: With dead ends: 236507 [2020-12-22 09:06:18,491 INFO L226 Difference]: Without dead ends: 156664 [2020-12-22 09:06:18,616 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 09:06:18,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156664 states. [2020-12-22 09:06:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156664 to 118153. [2020-12-22 09:06:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118153 states. [2020-12-22 09:06:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118153 states to 118153 states and 192797 transitions. [2020-12-22 09:06:24,198 INFO L78 Accepts]: Start accepts. Automaton has 118153 states and 192797 transitions. Word has length 122 [2020-12-22 09:06:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:24,198 INFO L481 AbstractCegarLoop]: Abstraction has 118153 states and 192797 transitions. [2020-12-22 09:06:24,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 118153 states and 192797 transitions. [2020-12-22 09:06:24,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 09:06:24,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:24,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:24,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:06:24,201 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:24,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:24,201 INFO L82 PathProgramCache]: Analyzing trace with hash -63121853, now seen corresponding path program 1 times [2020-12-22 09:06:24,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:24,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630008181] [2020-12-22 09:06:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:24,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630008181] [2020-12-22 09:06:24,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:24,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:06:24,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975257218] [2020-12-22 09:06:24,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:06:24,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:24,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:06:24,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:06:24,434 INFO L87 Difference]: Start difference. First operand 118153 states and 192797 transitions. Second operand 6 states. [2020-12-22 09:06:32,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:32,740 INFO L93 Difference]: Finished difference Result 304043 states and 497038 transitions. [2020-12-22 09:06:32,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:06:32,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2020-12-22 09:06:32,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:33,251 INFO L225 Difference]: With dead ends: 304043 [2020-12-22 09:06:33,252 INFO L226 Difference]: Without dead ends: 186139 [2020-12-22 09:06:33,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:06:33,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186139 states. [2020-12-22 09:06:39,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186139 to 139653. [2020-12-22 09:06:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139653 states. [2020-12-22 09:06:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139653 states to 139653 states and 227122 transitions. [2020-12-22 09:06:40,155 INFO L78 Accepts]: Start accepts. Automaton has 139653 states and 227122 transitions. Word has length 124 [2020-12-22 09:06:40,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:40,155 INFO L481 AbstractCegarLoop]: Abstraction has 139653 states and 227122 transitions. [2020-12-22 09:06:40,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:06:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 139653 states and 227122 transitions. [2020-12-22 09:06:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 09:06:40,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:40,162 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] [2020-12-22 09:06:40,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:06:40,165 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:40,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:40,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1315833451, now seen corresponding path program 1 times [2020-12-22 09:06:40,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:40,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797488941] [2020-12-22 09:06:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:40,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797488941] [2020-12-22 09:06:40,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:40,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:06:40,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047560461] [2020-12-22 09:06:40,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:06:40,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:40,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:06:40,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:06:40,343 INFO L87 Difference]: Start difference. First operand 139653 states and 227122 transitions. Second operand 6 states. [2020-12-22 09:06:53,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:53,031 INFO L93 Difference]: Finished difference Result 411051 states and 669042 transitions. [2020-12-22 09:06:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:06:53,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2020-12-22 09:06:53,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:53,705 INFO L225 Difference]: With dead ends: 411051 [2020-12-22 09:06:53,705 INFO L226 Difference]: Without dead ends: 271647 [2020-12-22 09:06:53,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:06:54,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271647 states. [2020-12-22 09:07:07,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271647 to 271645. [2020-12-22 09:07:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271645 states. [2020-12-22 09:07:08,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271645 states to 271645 states and 439449 transitions. [2020-12-22 09:07:08,020 INFO L78 Accepts]: Start accepts. Automaton has 271645 states and 439449 transitions. Word has length 127 [2020-12-22 09:07:08,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:08,020 INFO L481 AbstractCegarLoop]: Abstraction has 271645 states and 439449 transitions. [2020-12-22 09:07:08,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:07:08,021 INFO L276 IsEmpty]: Start isEmpty. Operand 271645 states and 439449 transitions. [2020-12-22 09:07:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 09:07:08,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:08,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:08,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:07:08,023 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:08,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:08,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2138040448, now seen corresponding path program 1 times [2020-12-22 09:07:08,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:08,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762653247] [2020-12-22 09:07:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:08,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762653247] [2020-12-22 09:07:08,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:08,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:07:08,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545135481] [2020-12-22 09:07:08,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:07:08,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:08,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:07:08,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:08,202 INFO L87 Difference]: Start difference. First operand 271645 states and 439449 transitions. Second operand 5 states. [2020-12-22 09:07:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:33,911 INFO L93 Difference]: Finished difference Result 522948 states and 842924 transitions. [2020-12-22 09:07:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:07:33,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-12-22 09:07:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:35,163 INFO L225 Difference]: With dead ends: 522948 [2020-12-22 09:07:35,163 INFO L226 Difference]: Without dead ends: 522946 [2020-12-22 09:07:35,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:07:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522946 states. [2020-12-22 09:07:57,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522946 to 277233. [2020-12-22 09:07:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277233 states. [2020-12-22 09:07:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277233 states to 277233 states and 445010 transitions. [2020-12-22 09:07:58,024 INFO L78 Accepts]: Start accepts. Automaton has 277233 states and 445010 transitions. Word has length 128 [2020-12-22 09:07:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:58,024 INFO L481 AbstractCegarLoop]: Abstraction has 277233 states and 445010 transitions. [2020-12-22 09:07:58,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:07:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 277233 states and 445010 transitions. [2020-12-22 09:07:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 09:07:58,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:58,034 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:58,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:07:58,034 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:58,035 INFO L82 PathProgramCache]: Analyzing trace with hash -813457913, now seen corresponding path program 1 times [2020-12-22 09:07:58,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:58,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290605556] [2020-12-22 09:07:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:07:58,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290605556] [2020-12-22 09:07:58,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:58,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:07:58,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015808191] [2020-12-22 09:07:58,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:07:58,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:58,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:07:58,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:07:58,660 INFO L87 Difference]: Start difference. First operand 277233 states and 445010 transitions. Second operand 6 states. [2020-12-22 09:08:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:18,216 INFO L93 Difference]: Finished difference Result 384439 states and 620323 transitions. [2020-12-22 09:08:18,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:08:18,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2020-12-22 09:08:18,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:18,935 INFO L225 Difference]: With dead ends: 384439 [2020-12-22 09:08:18,935 INFO L226 Difference]: Without dead ends: 340237 [2020-12-22 09:08:19,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:08:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340237 states. [2020-12-22 09:08:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340237 to 311713. [2020-12-22 09:08:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311713 states. [2020-12-22 09:08:39,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311713 states to 311713 states and 500950 transitions. [2020-12-22 09:08:39,238 INFO L78 Accepts]: Start accepts. Automaton has 311713 states and 500950 transitions. Word has length 162 [2020-12-22 09:08:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:39,239 INFO L481 AbstractCegarLoop]: Abstraction has 311713 states and 500950 transitions. [2020-12-22 09:08:39,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:08:39,239 INFO L276 IsEmpty]: Start isEmpty. Operand 311713 states and 500950 transitions. [2020-12-22 09:08:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 09:08:39,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:39,260 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:39,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:08:39,261 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:39,261 INFO L82 PathProgramCache]: Analyzing trace with hash -677174085, now seen corresponding path program 1 times [2020-12-22 09:08:39,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:39,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105755238] [2020-12-22 09:08:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 09:08:39,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105755238] [2020-12-22 09:08:39,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:39,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:08:39,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825543207] [2020-12-22 09:08:39,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:08:39,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:39,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:08:39,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:08:39,483 INFO L87 Difference]: Start difference. First operand 311713 states and 500950 transitions. Second operand 6 states. [2020-12-22 09:09:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:09:02,175 INFO L93 Difference]: Finished difference Result 418429 states and 675003 transitions. [2020-12-22 09:09:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:09:02,175 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2020-12-22 09:09:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:09:02,984 INFO L225 Difference]: With dead ends: 418429 [2020-12-22 09:09:02,984 INFO L226 Difference]: Without dead ends: 374577 [2020-12-22 09:09:03,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:09:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374577 states.