/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/systemc/token_ring.11.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:10:48,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:10:48,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:10:48,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:10:48,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:10:48,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:10:48,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:10:48,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:10:48,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:10:48,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:10:48,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:10:48,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:10:48,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:10:48,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:10:48,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:10:48,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:10:48,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:10:48,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:10:48,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:10:48,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:10:48,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:10:48,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:10:48,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:10:48,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:10:48,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:10:48,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:10:48,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:10:48,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:10:48,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:10:48,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:10:48,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:10:48,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:10:48,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:10:48,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:10:48,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:10:48,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:10:48,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:10:48,576 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:10:48,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:10:48,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:10:48,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:10:48,579 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:10:48,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:10:48,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:10:48,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:10:48,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:10:48,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:10:48,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:10:48,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:10:48,581 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:10:48,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:10:48,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:10:48,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:10:48,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:10:48,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:10:48,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:10:48,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:10:48,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:10:48,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:10:48,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:10:48,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:10:48,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:10:48,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:10:48,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:10:48,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:10:48,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:10:48,999 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:10:48,999 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:10:49,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.11.cil-2.c [2020-12-22 07:10:49,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2a71ed48/349c95c09b664a99ba5220031d39813d/FLAGa78760a94 [2020-12-22 07:10:49,721 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:10:49,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.11.cil-2.c [2020-12-22 07:10:49,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2a71ed48/349c95c09b664a99ba5220031d39813d/FLAGa78760a94 [2020-12-22 07:10:50,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2a71ed48/349c95c09b664a99ba5220031d39813d [2020-12-22 07:10:50,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:10:50,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:10:50,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:50,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:10:50,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:10:50,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:50" (1/1) ... [2020-12-22 07:10:50,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@661fe290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:50, skipping insertion in model container [2020-12-22 07:10:50,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:50" (1/1) ... [2020-12-22 07:10:50,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:10:50,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:10:50,288 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/systemc/token_ring.11.cil-2.c[366,379] [2020-12-22 07:10:50,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:50,521 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:10:50,534 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/systemc/token_ring.11.cil-2.c[366,379] [2020-12-22 07:10:50,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:50,676 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:10:50,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:50 WrapperNode [2020-12-22 07:10:50,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:50,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:50,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:10:50,680 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:10:50,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:50" (1/1) ... [2020-12-22 07:10:50,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:50" (1/1) ... [2020-12-22 07:10:50,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:50,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:10:50,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:10:50,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:10:50,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:50" (1/1) ... [2020-12-22 07:10:50,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:50" (1/1) ... [2020-12-22 07:10:50,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:50" (1/1) ... [2020-12-22 07:10:50,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:50" (1/1) ... [2020-12-22 07:10:50,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:50" (1/1) ... [2020-12-22 07:10:51,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:50" (1/1) ... [2020-12-22 07:10:51,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:50" (1/1) ... [2020-12-22 07:10:51,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:10:51,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:10:51,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:10:51,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:10:51,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:10:51,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:10:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:10:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:10:51,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:10:53,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:10:53,843 INFO L299 CfgBuilder]: Removed 490 assume(true) statements. [2020-12-22 07:10:53,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:53 BoogieIcfgContainer [2020-12-22 07:10:53,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:10:53,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:10:53,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:10:53,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:10:53,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:10:50" (1/3) ... [2020-12-22 07:10:53,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cda2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:53, skipping insertion in model container [2020-12-22 07:10:53,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:50" (2/3) ... [2020-12-22 07:10:53,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cda2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:53, skipping insertion in model container [2020-12-22 07:10:53,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:53" (3/3) ... [2020-12-22 07:10:53,857 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.11.cil-2.c [2020-12-22 07:10:53,864 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:10:53,870 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:10:53,890 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:10:53,929 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:10:53,929 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:10:53,929 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:10:53,929 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:10:53,929 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:10:53,930 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:10:53,930 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:10:53,930 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:10:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states. [2020-12-22 07:10:53,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:53,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:53,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:53,985 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:53,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1376939346, now seen corresponding path program 1 times [2020-12-22 07:10:54,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:54,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765549092] [2020-12-22 07:10:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:54,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765549092] [2020-12-22 07:10:54,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:54,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:54,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216629086] [2020-12-22 07:10:54,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:54,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:54,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:54,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:54,455 INFO L87 Difference]: Start difference. First operand 1541 states. Second operand 3 states. [2020-12-22 07:10:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:54,623 INFO L93 Difference]: Finished difference Result 3077 states and 4651 transitions. [2020-12-22 07:10:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:54,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:10:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:54,675 INFO L225 Difference]: With dead ends: 3077 [2020-12-22 07:10:54,682 INFO L226 Difference]: Without dead ends: 1537 [2020-12-22 07:10:54,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:54,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2020-12-22 07:10:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1537. [2020-12-22 07:10:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1537 states. [2020-12-22 07:10:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2295 transitions. [2020-12-22 07:10:54,847 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2295 transitions. Word has length 149 [2020-12-22 07:10:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:54,848 INFO L481 AbstractCegarLoop]: Abstraction has 1537 states and 2295 transitions. [2020-12-22 07:10:54,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2295 transitions. [2020-12-22 07:10:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:54,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:54,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:54,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:10:54,852 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:54,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:54,853 INFO L82 PathProgramCache]: Analyzing trace with hash -520040112, now seen corresponding path program 1 times [2020-12-22 07:10:54,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:54,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365570669] [2020-12-22 07:10:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:55,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365570669] [2020-12-22 07:10:55,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:55,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:55,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337204830] [2020-12-22 07:10:55,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:55,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:55,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:55,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:55,026 INFO L87 Difference]: Start difference. First operand 1537 states and 2295 transitions. Second operand 3 states. [2020-12-22 07:10:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:55,135 INFO L93 Difference]: Finished difference Result 3061 states and 4568 transitions. [2020-12-22 07:10:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:55,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:10:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:55,144 INFO L225 Difference]: With dead ends: 3061 [2020-12-22 07:10:55,144 INFO L226 Difference]: Without dead ends: 1537 [2020-12-22 07:10:55,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2020-12-22 07:10:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1537. [2020-12-22 07:10:55,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1537 states. [2020-12-22 07:10:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2294 transitions. [2020-12-22 07:10:55,232 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2294 transitions. Word has length 149 [2020-12-22 07:10:55,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:55,234 INFO L481 AbstractCegarLoop]: Abstraction has 1537 states and 2294 transitions. [2020-12-22 07:10:55,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2294 transitions. [2020-12-22 07:10:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:55,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:55,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:55,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:10:55,242 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:55,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:55,246 INFO L82 PathProgramCache]: Analyzing trace with hash -589687986, now seen corresponding path program 1 times [2020-12-22 07:10:55,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:55,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123806785] [2020-12-22 07:10:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:55,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123806785] [2020-12-22 07:10:55,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:55,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:55,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501335323] [2020-12-22 07:10:55,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:55,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:55,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:55,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:55,445 INFO L87 Difference]: Start difference. First operand 1537 states and 2294 transitions. Second operand 3 states. [2020-12-22 07:10:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:55,597 INFO L93 Difference]: Finished difference Result 4363 states and 6492 transitions. [2020-12-22 07:10:55,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:55,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:10:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:55,617 INFO L225 Difference]: With dead ends: 4363 [2020-12-22 07:10:55,617 INFO L226 Difference]: Without dead ends: 2842 [2020-12-22 07:10:55,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:55,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2020-12-22 07:10:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2840. [2020-12-22 07:10:55,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:10:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4220 transitions. [2020-12-22 07:10:55,780 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4220 transitions. Word has length 149 [2020-12-22 07:10:55,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:55,789 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4220 transitions. [2020-12-22 07:10:55,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:55,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4220 transitions. [2020-12-22 07:10:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:55,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:55,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:55,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:10:55,799 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:55,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1058479562, now seen corresponding path program 1 times [2020-12-22 07:10:55,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:55,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193311849] [2020-12-22 07:10:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:56,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193311849] [2020-12-22 07:10:56,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:56,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:56,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856313041] [2020-12-22 07:10:56,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:56,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:56,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:56,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:56,067 INFO L87 Difference]: Start difference. First operand 2840 states and 4220 transitions. Second operand 4 states. [2020-12-22 07:10:56,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:56,409 INFO L93 Difference]: Finished difference Result 6967 states and 10339 transitions. [2020-12-22 07:10:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:56,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:56,433 INFO L225 Difference]: With dead ends: 6967 [2020-12-22 07:10:56,433 INFO L226 Difference]: Without dead ends: 4144 [2020-12-22 07:10:56,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2020-12-22 07:10:56,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 2840. [2020-12-22 07:10:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:10:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4217 transitions. [2020-12-22 07:10:56,605 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4217 transitions. Word has length 149 [2020-12-22 07:10:56,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:56,606 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4217 transitions. [2020-12-22 07:10:56,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:56,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4217 transitions. [2020-12-22 07:10:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:56,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:56,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:56,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:10:56,609 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:56,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:56,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1421946060, now seen corresponding path program 1 times [2020-12-22 07:10:56,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:56,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878084881] [2020-12-22 07:10:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:56,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878084881] [2020-12-22 07:10:56,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:56,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:56,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052964985] [2020-12-22 07:10:56,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:56,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:56,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:56,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:56,744 INFO L87 Difference]: Start difference. First operand 2840 states and 4217 transitions. Second operand 4 states. [2020-12-22 07:10:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:57,064 INFO L93 Difference]: Finished difference Result 6965 states and 10329 transitions. [2020-12-22 07:10:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:57,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:57,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:57,086 INFO L225 Difference]: With dead ends: 6965 [2020-12-22 07:10:57,086 INFO L226 Difference]: Without dead ends: 4143 [2020-12-22 07:10:57,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2020-12-22 07:10:57,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 2840. [2020-12-22 07:10:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:10:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4214 transitions. [2020-12-22 07:10:57,255 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4214 transitions. Word has length 149 [2020-12-22 07:10:57,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:57,256 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4214 transitions. [2020-12-22 07:10:57,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:57,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4214 transitions. [2020-12-22 07:10:57,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:57,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:57,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:57,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:10:57,258 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:57,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1710765450, now seen corresponding path program 1 times [2020-12-22 07:10:57,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:57,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497439949] [2020-12-22 07:10:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:57,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497439949] [2020-12-22 07:10:57,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:57,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:57,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705500160] [2020-12-22 07:10:57,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:57,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:57,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:57,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:57,357 INFO L87 Difference]: Start difference. First operand 2840 states and 4214 transitions. Second operand 4 states. [2020-12-22 07:10:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:57,684 INFO L93 Difference]: Finished difference Result 6963 states and 10319 transitions. [2020-12-22 07:10:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:57,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:57,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:57,706 INFO L225 Difference]: With dead ends: 6963 [2020-12-22 07:10:57,707 INFO L226 Difference]: Without dead ends: 4142 [2020-12-22 07:10:57,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:57,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2020-12-22 07:10:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 2840. [2020-12-22 07:10:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:10:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4211 transitions. [2020-12-22 07:10:57,892 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4211 transitions. Word has length 149 [2020-12-22 07:10:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:57,892 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4211 transitions. [2020-12-22 07:10:57,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4211 transitions. [2020-12-22 07:10:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:57,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:57,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:57,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:10:57,895 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:57,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:57,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1165892876, now seen corresponding path program 1 times [2020-12-22 07:10:57,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:57,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515805827] [2020-12-22 07:10:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:57,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515805827] [2020-12-22 07:10:57,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:57,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:57,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628919296] [2020-12-22 07:10:57,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:57,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:57,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:57,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:57,967 INFO L87 Difference]: Start difference. First operand 2840 states and 4211 transitions. Second operand 3 states. [2020-12-22 07:10:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:58,181 INFO L93 Difference]: Finished difference Result 5660 states and 8391 transitions. [2020-12-22 07:10:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:58,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:10:58,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:58,198 INFO L225 Difference]: With dead ends: 5660 [2020-12-22 07:10:58,198 INFO L226 Difference]: Without dead ends: 2840 [2020-12-22 07:10:58,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2020-12-22 07:10:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2020-12-22 07:10:58,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:10:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4203 transitions. [2020-12-22 07:10:58,420 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4203 transitions. Word has length 149 [2020-12-22 07:10:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:58,420 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4203 transitions. [2020-12-22 07:10:58,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:58,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4203 transitions. [2020-12-22 07:10:58,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:58,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:58,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:58,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:10:58,425 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:58,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:58,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1841053002, now seen corresponding path program 1 times [2020-12-22 07:10:58,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:58,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797852240] [2020-12-22 07:10:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:58,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797852240] [2020-12-22 07:10:58,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:58,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:58,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663489994] [2020-12-22 07:10:58,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:58,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:58,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:58,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:58,502 INFO L87 Difference]: Start difference. First operand 2840 states and 4203 transitions. Second operand 4 states. [2020-12-22 07:10:58,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:58,829 INFO L93 Difference]: Finished difference Result 6957 states and 10284 transitions. [2020-12-22 07:10:58,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:58,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:58,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:58,875 INFO L225 Difference]: With dead ends: 6957 [2020-12-22 07:10:58,876 INFO L226 Difference]: Without dead ends: 4139 [2020-12-22 07:10:58,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2020-12-22 07:10:59,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 2840. [2020-12-22 07:10:59,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:10:59,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4200 transitions. [2020-12-22 07:10:59,129 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4200 transitions. Word has length 149 [2020-12-22 07:10:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:59,130 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4200 transitions. [2020-12-22 07:10:59,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4200 transitions. [2020-12-22 07:10:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:59,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:59,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:59,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:10:59,133 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1256281352, now seen corresponding path program 1 times [2020-12-22 07:10:59,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:59,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909501513] [2020-12-22 07:10:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:59,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909501513] [2020-12-22 07:10:59,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:59,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:59,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600160613] [2020-12-22 07:10:59,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:59,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:59,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:59,205 INFO L87 Difference]: Start difference. First operand 2840 states and 4200 transitions. Second operand 4 states. [2020-12-22 07:10:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:59,515 INFO L93 Difference]: Finished difference Result 6955 states and 10274 transitions. [2020-12-22 07:10:59,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:59,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:10:59,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:59,527 INFO L225 Difference]: With dead ends: 6955 [2020-12-22 07:10:59,527 INFO L226 Difference]: Without dead ends: 4138 [2020-12-22 07:10:59,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2020-12-22 07:10:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 2840. [2020-12-22 07:10:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:10:59,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4197 transitions. [2020-12-22 07:10:59,755 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4197 transitions. Word has length 149 [2020-12-22 07:10:59,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:59,756 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4197 transitions. [2020-12-22 07:10:59,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:59,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4197 transitions. [2020-12-22 07:10:59,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:10:59,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:59,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:59,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:10:59,758 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:59,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:59,759 INFO L82 PathProgramCache]: Analyzing trace with hash 821775754, now seen corresponding path program 1 times [2020-12-22 07:10:59,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:59,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580220965] [2020-12-22 07:10:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:59,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580220965] [2020-12-22 07:10:59,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:59,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:59,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161565758] [2020-12-22 07:10:59,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:59,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:59,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:59,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:59,817 INFO L87 Difference]: Start difference. First operand 2840 states and 4197 transitions. Second operand 4 states. [2020-12-22 07:11:00,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:00,132 INFO L93 Difference]: Finished difference Result 6953 states and 10264 transitions. [2020-12-22 07:11:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:00,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:00,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:00,143 INFO L225 Difference]: With dead ends: 6953 [2020-12-22 07:11:00,143 INFO L226 Difference]: Without dead ends: 4137 [2020-12-22 07:11:00,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4137 states. [2020-12-22 07:11:00,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4137 to 2840. [2020-12-22 07:11:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4194 transitions. [2020-12-22 07:11:00,359 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4194 transitions. Word has length 149 [2020-12-22 07:11:00,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:00,359 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4194 transitions. [2020-12-22 07:11:00,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:00,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4194 transitions. [2020-12-22 07:11:00,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:00,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:00,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:00,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:11:00,362 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:00,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:00,363 INFO L82 PathProgramCache]: Analyzing trace with hash 392117448, now seen corresponding path program 1 times [2020-12-22 07:11:00,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:00,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130454957] [2020-12-22 07:11:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:00,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130454957] [2020-12-22 07:11:00,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:00,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:00,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832741178] [2020-12-22 07:11:00,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:00,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:00,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:00,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:00,431 INFO L87 Difference]: Start difference. First operand 2840 states and 4194 transitions. Second operand 4 states. [2020-12-22 07:11:00,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:00,780 INFO L93 Difference]: Finished difference Result 6951 states and 10254 transitions. [2020-12-22 07:11:00,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:00,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:00,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:00,790 INFO L225 Difference]: With dead ends: 6951 [2020-12-22 07:11:00,791 INFO L226 Difference]: Without dead ends: 4136 [2020-12-22 07:11:00,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:00,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4136 states. [2020-12-22 07:11:01,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4136 to 2840. [2020-12-22 07:11:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4191 transitions. [2020-12-22 07:11:01,024 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4191 transitions. Word has length 149 [2020-12-22 07:11:01,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:01,024 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4191 transitions. [2020-12-22 07:11:01,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4191 transitions. [2020-12-22 07:11:01,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:01,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:01,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:01,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:11:01,027 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:01,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:01,028 INFO L82 PathProgramCache]: Analyzing trace with hash -314479158, now seen corresponding path program 1 times [2020-12-22 07:11:01,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:01,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339025661] [2020-12-22 07:11:01,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:01,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339025661] [2020-12-22 07:11:01,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:01,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:01,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717727497] [2020-12-22 07:11:01,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:01,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:01,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:01,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:01,111 INFO L87 Difference]: Start difference. First operand 2840 states and 4191 transitions. Second operand 3 states. [2020-12-22 07:11:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:01,350 INFO L93 Difference]: Finished difference Result 5654 states and 8344 transitions. [2020-12-22 07:11:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:01,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:11:01,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:01,362 INFO L225 Difference]: With dead ends: 5654 [2020-12-22 07:11:01,362 INFO L226 Difference]: Without dead ends: 2840 [2020-12-22 07:11:01,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:01,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2020-12-22 07:11:01,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2020-12-22 07:11:01,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4183 transitions. [2020-12-22 07:11:01,596 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4183 transitions. Word has length 149 [2020-12-22 07:11:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:01,597 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4183 transitions. [2020-12-22 07:11:01,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4183 transitions. [2020-12-22 07:11:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:01,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:01,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:01,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:11:01,599 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:01,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:01,600 INFO L82 PathProgramCache]: Analyzing trace with hash 123085638, now seen corresponding path program 1 times [2020-12-22 07:11:01,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:01,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103142989] [2020-12-22 07:11:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:01,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103142989] [2020-12-22 07:11:01,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:01,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:01,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172413534] [2020-12-22 07:11:01,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:01,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:01,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:01,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:01,673 INFO L87 Difference]: Start difference. First operand 2840 states and 4183 transitions. Second operand 4 states. [2020-12-22 07:11:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:02,063 INFO L93 Difference]: Finished difference Result 6947 states and 10223 transitions. [2020-12-22 07:11:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:02,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:02,074 INFO L225 Difference]: With dead ends: 6947 [2020-12-22 07:11:02,075 INFO L226 Difference]: Without dead ends: 4134 [2020-12-22 07:11:02,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:02,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2020-12-22 07:11:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 2840. [2020-12-22 07:11:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4180 transitions. [2020-12-22 07:11:02,262 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4180 transitions. Word has length 149 [2020-12-22 07:11:02,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:02,263 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4180 transitions. [2020-12-22 07:11:02,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:02,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4180 transitions. [2020-12-22 07:11:02,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:02,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:02,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:02,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:11:02,265 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:02,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:02,266 INFO L82 PathProgramCache]: Analyzing trace with hash 984919240, now seen corresponding path program 1 times [2020-12-22 07:11:02,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:02,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104953133] [2020-12-22 07:11:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:02,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104953133] [2020-12-22 07:11:02,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:02,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:02,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326835789] [2020-12-22 07:11:02,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:02,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:02,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:02,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:02,320 INFO L87 Difference]: Start difference. First operand 2840 states and 4180 transitions. Second operand 4 states. [2020-12-22 07:11:02,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:02,730 INFO L93 Difference]: Finished difference Result 6861 states and 10093 transitions. [2020-12-22 07:11:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:02,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:02,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:02,740 INFO L225 Difference]: With dead ends: 6861 [2020-12-22 07:11:02,740 INFO L226 Difference]: Without dead ends: 4049 [2020-12-22 07:11:02,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:02,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-12-22 07:11:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 2840. [2020-12-22 07:11:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4177 transitions. [2020-12-22 07:11:02,967 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4177 transitions. Word has length 149 [2020-12-22 07:11:02,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:02,967 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4177 transitions. [2020-12-22 07:11:02,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4177 transitions. [2020-12-22 07:11:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:02,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:02,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:02,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:11:02,970 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:02,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1065489658, now seen corresponding path program 1 times [2020-12-22 07:11:02,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:02,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786193307] [2020-12-22 07:11:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:03,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786193307] [2020-12-22 07:11:03,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:03,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:03,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443914416] [2020-12-22 07:11:03,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:03,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:03,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:03,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:03,022 INFO L87 Difference]: Start difference. First operand 2840 states and 4177 transitions. Second operand 3 states. [2020-12-22 07:11:03,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:03,252 INFO L93 Difference]: Finished difference Result 5650 states and 8311 transitions. [2020-12-22 07:11:03,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:03,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:11:03,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:03,259 INFO L225 Difference]: With dead ends: 5650 [2020-12-22 07:11:03,259 INFO L226 Difference]: Without dead ends: 2840 [2020-12-22 07:11:03,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2020-12-22 07:11:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2020-12-22 07:11:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4143 transitions. [2020-12-22 07:11:03,452 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4143 transitions. Word has length 149 [2020-12-22 07:11:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:03,452 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4143 transitions. [2020-12-22 07:11:03,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4143 transitions. [2020-12-22 07:11:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:03,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:03,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:03,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:11:03,455 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:03,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:03,456 INFO L82 PathProgramCache]: Analyzing trace with hash 141416899, now seen corresponding path program 1 times [2020-12-22 07:11:03,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:03,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286081359] [2020-12-22 07:11:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:03,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286081359] [2020-12-22 07:11:03,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:03,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:03,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120082599] [2020-12-22 07:11:03,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:03,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:03,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:03,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:03,559 INFO L87 Difference]: Start difference. First operand 2840 states and 4143 transitions. Second operand 4 states. [2020-12-22 07:11:03,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:03,988 INFO L93 Difference]: Finished difference Result 6855 states and 9995 transitions. [2020-12-22 07:11:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:03,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:03,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:03,998 INFO L225 Difference]: With dead ends: 6855 [2020-12-22 07:11:03,998 INFO L226 Difference]: Without dead ends: 4046 [2020-12-22 07:11:04,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:04,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2020-12-22 07:11:04,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 2840. [2020-12-22 07:11:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4140 transitions. [2020-12-22 07:11:04,182 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4140 transitions. Word has length 149 [2020-12-22 07:11:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:04,182 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4140 transitions. [2020-12-22 07:11:04,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4140 transitions. [2020-12-22 07:11:04,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:04,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:04,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:04,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:11:04,185 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:04,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:04,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1140755387, now seen corresponding path program 1 times [2020-12-22 07:11:04,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:04,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159307239] [2020-12-22 07:11:04,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:04,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159307239] [2020-12-22 07:11:04,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:04,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:04,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660709949] [2020-12-22 07:11:04,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:04,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:04,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:04,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:04,241 INFO L87 Difference]: Start difference. First operand 2840 states and 4140 transitions. Second operand 4 states. [2020-12-22 07:11:04,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:04,769 INFO L93 Difference]: Finished difference Result 6853 states and 9985 transitions. [2020-12-22 07:11:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:04,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:04,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:04,778 INFO L225 Difference]: With dead ends: 6853 [2020-12-22 07:11:04,779 INFO L226 Difference]: Without dead ends: 4045 [2020-12-22 07:11:04,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:04,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2020-12-22 07:11:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 2840. [2020-12-22 07:11:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:05,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4137 transitions. [2020-12-22 07:11:05,041 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4137 transitions. Word has length 149 [2020-12-22 07:11:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:05,041 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4137 transitions. [2020-12-22 07:11:05,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4137 transitions. [2020-12-22 07:11:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:05,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:05,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:05,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:11:05,043 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:05,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1311736195, now seen corresponding path program 1 times [2020-12-22 07:11:05,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:05,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304027997] [2020-12-22 07:11:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:05,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304027997] [2020-12-22 07:11:05,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:05,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:05,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216066242] [2020-12-22 07:11:05,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:05,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:05,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:05,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:05,122 INFO L87 Difference]: Start difference. First operand 2840 states and 4137 transitions. Second operand 4 states. [2020-12-22 07:11:05,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:05,579 INFO L93 Difference]: Finished difference Result 6851 states and 9975 transitions. [2020-12-22 07:11:05,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:05,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:05,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:05,624 INFO L225 Difference]: With dead ends: 6851 [2020-12-22 07:11:05,625 INFO L226 Difference]: Without dead ends: 4044 [2020-12-22 07:11:05,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:05,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4044 states. [2020-12-22 07:11:05,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4044 to 2840. [2020-12-22 07:11:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4134 transitions. [2020-12-22 07:11:05,843 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4134 transitions. Word has length 149 [2020-12-22 07:11:05,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:05,843 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4134 transitions. [2020-12-22 07:11:05,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:05,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4134 transitions. [2020-12-22 07:11:05,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:05,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:05,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:05,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:11:05,845 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:05,846 INFO L82 PathProgramCache]: Analyzing trace with hash -410266491, now seen corresponding path program 1 times [2020-12-22 07:11:05,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:05,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156432379] [2020-12-22 07:11:05,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:05,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156432379] [2020-12-22 07:11:05,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:05,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:05,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559765157] [2020-12-22 07:11:05,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:05,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:05,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:05,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:05,904 INFO L87 Difference]: Start difference. First operand 2840 states and 4134 transitions. Second operand 4 states. [2020-12-22 07:11:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:06,381 INFO L93 Difference]: Finished difference Result 6849 states and 9965 transitions. [2020-12-22 07:11:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:06,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:06,391 INFO L225 Difference]: With dead ends: 6849 [2020-12-22 07:11:06,391 INFO L226 Difference]: Without dead ends: 4043 [2020-12-22 07:11:06,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4043 states. [2020-12-22 07:11:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4043 to 2840. [2020-12-22 07:11:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4131 transitions. [2020-12-22 07:11:06,640 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4131 transitions. Word has length 149 [2020-12-22 07:11:06,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:06,640 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4131 transitions. [2020-12-22 07:11:06,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4131 transitions. [2020-12-22 07:11:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:06,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:06,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:06,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:11:06,642 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:06,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:06,643 INFO L82 PathProgramCache]: Analyzing trace with hash -742909629, now seen corresponding path program 1 times [2020-12-22 07:11:06,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:06,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204752681] [2020-12-22 07:11:06,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:06,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204752681] [2020-12-22 07:11:06,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:06,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:06,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011987532] [2020-12-22 07:11:06,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:06,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:06,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:06,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:06,742 INFO L87 Difference]: Start difference. First operand 2840 states and 4131 transitions. Second operand 4 states. [2020-12-22 07:11:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:07,176 INFO L93 Difference]: Finished difference Result 6847 states and 9955 transitions. [2020-12-22 07:11:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:07,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:07,187 INFO L225 Difference]: With dead ends: 6847 [2020-12-22 07:11:07,187 INFO L226 Difference]: Without dead ends: 4042 [2020-12-22 07:11:07,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4042 states. [2020-12-22 07:11:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4042 to 2840. [2020-12-22 07:11:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4128 transitions. [2020-12-22 07:11:07,420 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4128 transitions. Word has length 149 [2020-12-22 07:11:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:07,420 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4128 transitions. [2020-12-22 07:11:07,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:07,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4128 transitions. [2020-12-22 07:11:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:07,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:07,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:07,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:11:07,422 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:07,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1186022597, now seen corresponding path program 1 times [2020-12-22 07:11:07,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:07,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526372414] [2020-12-22 07:11:07,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:07,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526372414] [2020-12-22 07:11:07,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:07,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:07,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628355482] [2020-12-22 07:11:07,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:07,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:07,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:07,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:07,484 INFO L87 Difference]: Start difference. First operand 2840 states and 4128 transitions. Second operand 4 states. [2020-12-22 07:11:07,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:07,916 INFO L93 Difference]: Finished difference Result 6845 states and 9945 transitions. [2020-12-22 07:11:07,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:07,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:07,923 INFO L225 Difference]: With dead ends: 6845 [2020-12-22 07:11:07,923 INFO L226 Difference]: Without dead ends: 4041 [2020-12-22 07:11:07,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4041 states. [2020-12-22 07:11:08,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4041 to 2840. [2020-12-22 07:11:08,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4125 transitions. [2020-12-22 07:11:08,169 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4125 transitions. Word has length 149 [2020-12-22 07:11:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:08,169 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4125 transitions. [2020-12-22 07:11:08,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4125 transitions. [2020-12-22 07:11:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:08,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:08,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:08,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:11:08,171 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:08,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1107058429, now seen corresponding path program 1 times [2020-12-22 07:11:08,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:08,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981442954] [2020-12-22 07:11:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:08,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981442954] [2020-12-22 07:11:08,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:08,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:08,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421880887] [2020-12-22 07:11:08,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:08,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:08,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:08,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:08,238 INFO L87 Difference]: Start difference. First operand 2840 states and 4125 transitions. Second operand 4 states. [2020-12-22 07:11:08,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:08,705 INFO L93 Difference]: Finished difference Result 6841 states and 9931 transitions. [2020-12-22 07:11:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:08,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:08,711 INFO L225 Difference]: With dead ends: 6841 [2020-12-22 07:11:08,711 INFO L226 Difference]: Without dead ends: 4039 [2020-12-22 07:11:08,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2020-12-22 07:11:08,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 2840. [2020-12-22 07:11:08,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4122 transitions. [2020-12-22 07:11:08,998 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4122 transitions. Word has length 149 [2020-12-22 07:11:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:08,998 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4122 transitions. [2020-12-22 07:11:08,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4122 transitions. [2020-12-22 07:11:09,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:09,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:09,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:09,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:11:09,000 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:09,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:09,001 INFO L82 PathProgramCache]: Analyzing trace with hash -635702079, now seen corresponding path program 1 times [2020-12-22 07:11:09,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:09,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111853440] [2020-12-22 07:11:09,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:09,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111853440] [2020-12-22 07:11:09,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:09,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:09,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375939853] [2020-12-22 07:11:09,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:09,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:09,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:09,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:09,055 INFO L87 Difference]: Start difference. First operand 2840 states and 4122 transitions. Second operand 4 states. [2020-12-22 07:11:09,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:09,445 INFO L93 Difference]: Finished difference Result 6839 states and 9921 transitions. [2020-12-22 07:11:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:09,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 07:11:09,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:09,449 INFO L225 Difference]: With dead ends: 6839 [2020-12-22 07:11:09,449 INFO L226 Difference]: Without dead ends: 4038 [2020-12-22 07:11:09,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2020-12-22 07:11:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 2840. [2020-12-22 07:11:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-12-22 07:11:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4119 transitions. [2020-12-22 07:11:09,864 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4119 transitions. Word has length 149 [2020-12-22 07:11:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:09,865 INFO L481 AbstractCegarLoop]: Abstraction has 2840 states and 4119 transitions. [2020-12-22 07:11:09,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4119 transitions. [2020-12-22 07:11:09,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 07:11:09,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:09,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:09,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:11:09,868 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:09,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2011902275, now seen corresponding path program 1 times [2020-12-22 07:11:09,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:09,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614145101] [2020-12-22 07:11:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:11:09,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614145101] [2020-12-22 07:11:09,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:09,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:11:09,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577154188] [2020-12-22 07:11:09,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:09,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:09,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:09,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:09,976 INFO L87 Difference]: Start difference. First operand 2840 states and 4119 transitions. Second operand 3 states. [2020-12-22 07:11:10,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:10,367 INFO L93 Difference]: Finished difference Result 8298 states and 12022 transitions. [2020-12-22 07:11:10,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:10,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 07:11:10,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:10,373 INFO L225 Difference]: With dead ends: 8298 [2020-12-22 07:11:10,373 INFO L226 Difference]: Without dead ends: 5499 [2020-12-22 07:11:10,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:10,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5499 states. [2020-12-22 07:11:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5499 to 5335. [2020-12-22 07:11:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5335 states. [2020-12-22 07:11:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5335 states to 5335 states and 7698 transitions. [2020-12-22 07:11:10,918 INFO L78 Accepts]: Start accepts. Automaton has 5335 states and 7698 transitions. Word has length 149 [2020-12-22 07:11:10,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:10,919 INFO L481 AbstractCegarLoop]: Abstraction has 5335 states and 7698 transitions. [2020-12-22 07:11:10,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 5335 states and 7698 transitions. [2020-12-22 07:11:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:10,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:10,931 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:10,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:11:10,931 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash 813372107, now seen corresponding path program 1 times [2020-12-22 07:11:10,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:10,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646268017] [2020-12-22 07:11:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:11,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646268017] [2020-12-22 07:11:11,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:11,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:11,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603114018] [2020-12-22 07:11:11,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:11,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:11,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:11,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:11,020 INFO L87 Difference]: Start difference. First operand 5335 states and 7698 transitions. Second operand 5 states. [2020-12-22 07:11:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:12,194 INFO L93 Difference]: Finished difference Result 15776 states and 22775 transitions. [2020-12-22 07:11:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:12,194 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:11:12,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:12,204 INFO L225 Difference]: With dead ends: 15776 [2020-12-22 07:11:12,205 INFO L226 Difference]: Without dead ends: 10486 [2020-12-22 07:11:12,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:12,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10486 states. [2020-12-22 07:11:12,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10486 to 5416. [2020-12-22 07:11:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5416 states. [2020-12-22 07:11:12,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5416 states to 5416 states and 7753 transitions. [2020-12-22 07:11:12,592 INFO L78 Accepts]: Start accepts. Automaton has 5416 states and 7753 transitions. Word has length 243 [2020-12-22 07:11:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:12,592 INFO L481 AbstractCegarLoop]: Abstraction has 5416 states and 7753 transitions. [2020-12-22 07:11:12,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:12,592 INFO L276 IsEmpty]: Start isEmpty. Operand 5416 states and 7753 transitions. [2020-12-22 07:11:12,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:12,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:12,597 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:12,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:11:12,597 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:12,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1097357645, now seen corresponding path program 1 times [2020-12-22 07:11:12,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:12,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9345047] [2020-12-22 07:11:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:12,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9345047] [2020-12-22 07:11:12,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:12,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:12,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296506556] [2020-12-22 07:11:12,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:12,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:12,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:12,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:12,685 INFO L87 Difference]: Start difference. First operand 5416 states and 7753 transitions. Second operand 5 states. [2020-12-22 07:11:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:14,213 INFO L93 Difference]: Finished difference Result 20621 states and 29581 transitions. [2020-12-22 07:11:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:14,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:11:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:14,229 INFO L225 Difference]: With dead ends: 20621 [2020-12-22 07:11:14,229 INFO L226 Difference]: Without dead ends: 15257 [2020-12-22 07:11:14,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:14,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15257 states. [2020-12-22 07:11:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15257 to 5575. [2020-12-22 07:11:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5575 states. [2020-12-22 07:11:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5575 states to 5575 states and 7912 transitions. [2020-12-22 07:11:14,782 INFO L78 Accepts]: Start accepts. Automaton has 5575 states and 7912 transitions. Word has length 243 [2020-12-22 07:11:14,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:14,782 INFO L481 AbstractCegarLoop]: Abstraction has 5575 states and 7912 transitions. [2020-12-22 07:11:14,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 5575 states and 7912 transitions. [2020-12-22 07:11:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:14,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:14,786 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:14,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:11:14,787 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:14,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:14,787 INFO L82 PathProgramCache]: Analyzing trace with hash -983226033, now seen corresponding path program 1 times [2020-12-22 07:11:14,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:14,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247903955] [2020-12-22 07:11:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:14,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247903955] [2020-12-22 07:11:14,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:14,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:14,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392211537] [2020-12-22 07:11:14,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:14,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:14,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:14,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:14,872 INFO L87 Difference]: Start difference. First operand 5575 states and 7912 transitions. Second operand 5 states. [2020-12-22 07:11:15,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:15,727 INFO L93 Difference]: Finished difference Result 13538 states and 19152 transitions. [2020-12-22 07:11:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:15,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:11:15,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:15,737 INFO L225 Difference]: With dead ends: 13538 [2020-12-22 07:11:15,737 INFO L226 Difference]: Without dead ends: 8025 [2020-12-22 07:11:15,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:15,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8025 states. [2020-12-22 07:11:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8025 to 5587. [2020-12-22 07:11:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5587 states. [2020-12-22 07:11:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 7875 transitions. [2020-12-22 07:11:16,198 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 7875 transitions. Word has length 243 [2020-12-22 07:11:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:16,198 INFO L481 AbstractCegarLoop]: Abstraction has 5587 states and 7875 transitions. [2020-12-22 07:11:16,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 7875 transitions. [2020-12-22 07:11:16,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:16,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:16,203 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:16,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:11:16,204 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:16,204 INFO L82 PathProgramCache]: Analyzing trace with hash 159934291, now seen corresponding path program 1 times [2020-12-22 07:11:16,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:16,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135471163] [2020-12-22 07:11:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:16,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135471163] [2020-12-22 07:11:16,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:16,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:16,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103292432] [2020-12-22 07:11:16,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:16,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:16,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:16,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:16,303 INFO L87 Difference]: Start difference. First operand 5587 states and 7875 transitions. Second operand 4 states. [2020-12-22 07:11:17,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:17,578 INFO L93 Difference]: Finished difference Result 18935 states and 26651 transitions. [2020-12-22 07:11:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:17,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 243 [2020-12-22 07:11:17,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:17,592 INFO L225 Difference]: With dead ends: 18935 [2020-12-22 07:11:17,592 INFO L226 Difference]: Without dead ends: 13412 [2020-12-22 07:11:17,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13412 states. [2020-12-22 07:11:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13412 to 10610. [2020-12-22 07:11:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10610 states. [2020-12-22 07:11:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 14891 transitions. [2020-12-22 07:11:18,635 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 14891 transitions. Word has length 243 [2020-12-22 07:11:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:18,635 INFO L481 AbstractCegarLoop]: Abstraction has 10610 states and 14891 transitions. [2020-12-22 07:11:18,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 14891 transitions. [2020-12-22 07:11:18,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:18,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:18,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:18,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:11:18,644 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:18,644 INFO L82 PathProgramCache]: Analyzing trace with hash 713428309, now seen corresponding path program 1 times [2020-12-22 07:11:18,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:18,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700021278] [2020-12-22 07:11:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:18,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700021278] [2020-12-22 07:11:18,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:18,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:18,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635066168] [2020-12-22 07:11:18,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:18,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:18,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:18,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:18,740 INFO L87 Difference]: Start difference. First operand 10610 states and 14891 transitions. Second operand 5 states. [2020-12-22 07:11:20,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:20,640 INFO L93 Difference]: Finished difference Result 30242 states and 42677 transitions. [2020-12-22 07:11:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:20,642 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:11:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:20,661 INFO L225 Difference]: With dead ends: 30242 [2020-12-22 07:11:20,662 INFO L226 Difference]: Without dead ends: 19700 [2020-12-22 07:11:20,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:20,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19700 states. [2020-12-22 07:11:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19700 to 10766. [2020-12-22 07:11:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10766 states. [2020-12-22 07:11:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10766 states to 10766 states and 14998 transitions. [2020-12-22 07:11:21,746 INFO L78 Accepts]: Start accepts. Automaton has 10766 states and 14998 transitions. Word has length 243 [2020-12-22 07:11:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:21,746 INFO L481 AbstractCegarLoop]: Abstraction has 10766 states and 14998 transitions. [2020-12-22 07:11:21,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 10766 states and 14998 transitions. [2020-12-22 07:11:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:21,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:21,754 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:21,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:11:21,754 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:21,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:21,755 INFO L82 PathProgramCache]: Analyzing trace with hash 560012889, now seen corresponding path program 1 times [2020-12-22 07:11:21,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:21,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245253090] [2020-12-22 07:11:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:21,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245253090] [2020-12-22 07:11:21,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:21,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:21,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390787803] [2020-12-22 07:11:21,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:21,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:21,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:21,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:21,850 INFO L87 Difference]: Start difference. First operand 10766 states and 14998 transitions. Second operand 4 states. [2020-12-22 07:11:24,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:24,495 INFO L93 Difference]: Finished difference Result 36608 states and 50928 transitions. [2020-12-22 07:11:24,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:24,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 243 [2020-12-22 07:11:24,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:24,523 INFO L225 Difference]: With dead ends: 36608 [2020-12-22 07:11:24,524 INFO L226 Difference]: Without dead ends: 25919 [2020-12-22 07:11:24,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25919 states. [2020-12-22 07:11:26,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25919 to 20553. [2020-12-22 07:11:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20553 states. [2020-12-22 07:11:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20553 states to 20553 states and 28515 transitions. [2020-12-22 07:11:26,458 INFO L78 Accepts]: Start accepts. Automaton has 20553 states and 28515 transitions. Word has length 243 [2020-12-22 07:11:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:26,458 INFO L481 AbstractCegarLoop]: Abstraction has 20553 states and 28515 transitions. [2020-12-22 07:11:26,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:26,458 INFO L276 IsEmpty]: Start isEmpty. Operand 20553 states and 28515 transitions. [2020-12-22 07:11:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:26,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:26,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:26,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:11:26,469 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1321846949, now seen corresponding path program 1 times [2020-12-22 07:11:26,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:26,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898047360] [2020-12-22 07:11:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:26,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898047360] [2020-12-22 07:11:26,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:26,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:26,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626465467] [2020-12-22 07:11:26,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:26,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:26,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:26,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:26,555 INFO L87 Difference]: Start difference. First operand 20553 states and 28515 transitions. Second operand 5 states. [2020-12-22 07:11:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:30,349 INFO L93 Difference]: Finished difference Result 57317 states and 80034 transitions. [2020-12-22 07:11:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:30,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:11:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:30,385 INFO L225 Difference]: With dead ends: 57317 [2020-12-22 07:11:30,385 INFO L226 Difference]: Without dead ends: 36845 [2020-12-22 07:11:30,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36845 states. [2020-12-22 07:11:32,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36845 to 20853. [2020-12-22 07:11:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20853 states. [2020-12-22 07:11:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20853 states to 20853 states and 28722 transitions. [2020-12-22 07:11:32,704 INFO L78 Accepts]: Start accepts. Automaton has 20853 states and 28722 transitions. Word has length 243 [2020-12-22 07:11:32,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:32,704 INFO L481 AbstractCegarLoop]: Abstraction has 20853 states and 28722 transitions. [2020-12-22 07:11:32,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:32,705 INFO L276 IsEmpty]: Start isEmpty. Operand 20853 states and 28722 transitions. [2020-12-22 07:11:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:32,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:32,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:32,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:11:32,713 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:32,713 INFO L82 PathProgramCache]: Analyzing trace with hash 729787999, now seen corresponding path program 1 times [2020-12-22 07:11:32,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:32,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672500358] [2020-12-22 07:11:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:32,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672500358] [2020-12-22 07:11:32,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:32,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:32,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516628454] [2020-12-22 07:11:32,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:32,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:32,800 INFO L87 Difference]: Start difference. First operand 20853 states and 28722 transitions. Second operand 5 states. [2020-12-22 07:11:38,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:38,614 INFO L93 Difference]: Finished difference Result 72103 states and 100275 transitions. [2020-12-22 07:11:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:38,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:11:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:38,670 INFO L225 Difference]: With dead ends: 72103 [2020-12-22 07:11:38,670 INFO L226 Difference]: Without dead ends: 51338 [2020-12-22 07:11:38,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:38,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51338 states. [2020-12-22 07:11:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51338 to 21432. [2020-12-22 07:11:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21432 states. [2020-12-22 07:11:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21432 states to 21432 states and 29301 transitions. [2020-12-22 07:11:41,326 INFO L78 Accepts]: Start accepts. Automaton has 21432 states and 29301 transitions. Word has length 243 [2020-12-22 07:11:41,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:41,326 INFO L481 AbstractCegarLoop]: Abstraction has 21432 states and 29301 transitions. [2020-12-22 07:11:41,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 21432 states and 29301 transitions. [2020-12-22 07:11:41,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:41,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:41,335 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:41,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 07:11:41,336 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:41,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:41,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1679837085, now seen corresponding path program 1 times [2020-12-22 07:11:41,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:41,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825225019] [2020-12-22 07:11:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:41,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825225019] [2020-12-22 07:11:41,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:41,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:41,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689653779] [2020-12-22 07:11:41,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:41,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:41,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:41,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:41,444 INFO L87 Difference]: Start difference. First operand 21432 states and 29301 transitions. Second operand 4 states. [2020-12-22 07:11:47,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:47,522 INFO L93 Difference]: Finished difference Result 72864 states and 99488 transitions. [2020-12-22 07:11:47,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:47,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 243 [2020-12-22 07:11:47,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:47,584 INFO L225 Difference]: With dead ends: 72864 [2020-12-22 07:11:47,585 INFO L226 Difference]: Without dead ends: 51525 [2020-12-22 07:11:47,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51525 states. [2020-12-22 07:11:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51525 to 40999. [2020-12-22 07:11:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40999 states. [2020-12-22 07:11:52,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40999 states to 40999 states and 55838 transitions. [2020-12-22 07:11:52,733 INFO L78 Accepts]: Start accepts. Automaton has 40999 states and 55838 transitions. Word has length 243 [2020-12-22 07:11:52,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:52,733 INFO L481 AbstractCegarLoop]: Abstraction has 40999 states and 55838 transitions. [2020-12-22 07:11:52,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand 40999 states and 55838 transitions. [2020-12-22 07:11:52,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:11:52,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:52,752 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:52,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 07:11:52,752 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash 601932901, now seen corresponding path program 1 times [2020-12-22 07:11:52,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:52,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581019956] [2020-12-22 07:11:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:52,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581019956] [2020-12-22 07:11:52,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:52,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:52,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845275958] [2020-12-22 07:11:52,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:52,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:52,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:52,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:52,852 INFO L87 Difference]: Start difference. First operand 40999 states and 55838 transitions. Second operand 5 states. [2020-12-22 07:12:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:01,413 INFO L93 Difference]: Finished difference Result 111497 states and 152961 transitions. [2020-12-22 07:12:01,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:01,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:12:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:01,496 INFO L225 Difference]: With dead ends: 111497 [2020-12-22 07:12:01,496 INFO L226 Difference]: Without dead ends: 70595 [2020-12-22 07:12:01,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:12:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70595 states. [2020-12-22 07:12:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70595 to 41575. [2020-12-22 07:12:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41575 states. [2020-12-22 07:12:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41575 states to 41575 states and 56237 transitions. [2020-12-22 07:12:06,992 INFO L78 Accepts]: Start accepts. Automaton has 41575 states and 56237 transitions. Word has length 243 [2020-12-22 07:12:06,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:06,992 INFO L481 AbstractCegarLoop]: Abstraction has 41575 states and 56237 transitions. [2020-12-22 07:12:06,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:06,992 INFO L276 IsEmpty]: Start isEmpty. Operand 41575 states and 56237 transitions. [2020-12-22 07:12:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:12:07,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:07,010 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:07,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 07:12:07,010 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:07,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:07,011 INFO L82 PathProgramCache]: Analyzing trace with hash 931242345, now seen corresponding path program 1 times [2020-12-22 07:12:07,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:07,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489933487] [2020-12-22 07:12:07,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:12:07,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489933487] [2020-12-22 07:12:07,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:07,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:07,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703158041] [2020-12-22 07:12:07,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:07,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:07,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:07,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:07,142 INFO L87 Difference]: Start difference. First operand 41575 states and 56237 transitions. Second operand 5 states. [2020-12-22 07:12:18,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:18,747 INFO L93 Difference]: Finished difference Result 138151 states and 188834 transitions. [2020-12-22 07:12:18,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:18,747 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:12:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:18,854 INFO L225 Difference]: With dead ends: 138151 [2020-12-22 07:12:18,854 INFO L226 Difference]: Without dead ends: 96680 [2020-12-22 07:12:18,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:12:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96680 states. [2020-12-22 07:12:25,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96680 to 42682. [2020-12-22 07:12:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42682 states. [2020-12-22 07:12:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42682 states to 42682 states and 57344 transitions. [2020-12-22 07:12:25,185 INFO L78 Accepts]: Start accepts. Automaton has 42682 states and 57344 transitions. Word has length 243 [2020-12-22 07:12:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:25,185 INFO L481 AbstractCegarLoop]: Abstraction has 42682 states and 57344 transitions. [2020-12-22 07:12:25,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:25,185 INFO L276 IsEmpty]: Start isEmpty. Operand 42682 states and 57344 transitions. [2020-12-22 07:12:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:12:25,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:25,203 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:25,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-22 07:12:25,204 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:25,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1917144085, now seen corresponding path program 1 times [2020-12-22 07:12:25,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:25,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891529864] [2020-12-22 07:12:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:12:25,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891529864] [2020-12-22 07:12:25,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:25,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:25,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966038] [2020-12-22 07:12:25,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:25,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:25,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:25,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:25,306 INFO L87 Difference]: Start difference. First operand 42682 states and 57344 transitions. Second operand 4 states. [2020-12-22 07:12:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:38,782 INFO L93 Difference]: Finished difference Result 144824 states and 194323 transitions. [2020-12-22 07:12:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:12:38,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 243 [2020-12-22 07:12:38,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:38,908 INFO L225 Difference]: With dead ends: 144824 [2020-12-22 07:12:38,909 INFO L226 Difference]: Without dead ends: 102251 [2020-12-22 07:12:38,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:39,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102251 states. [2020-12-22 07:12:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102251 to 81673. [2020-12-22 07:12:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81673 states. [2020-12-22 07:12:49,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81673 states to 81673 states and 109341 transitions. [2020-12-22 07:12:49,884 INFO L78 Accepts]: Start accepts. Automaton has 81673 states and 109341 transitions. Word has length 243 [2020-12-22 07:12:49,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:49,884 INFO L481 AbstractCegarLoop]: Abstraction has 81673 states and 109341 transitions. [2020-12-22 07:12:49,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:49,884 INFO L276 IsEmpty]: Start isEmpty. Operand 81673 states and 109341 transitions. [2020-12-22 07:12:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:12:49,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:49,903 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:49,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-12-22 07:12:49,904 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:49,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:49,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1360568148, now seen corresponding path program 1 times [2020-12-22 07:12:49,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:49,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010805494] [2020-12-22 07:12:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:12:49,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010805494] [2020-12-22 07:12:49,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:49,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:49,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871352950] [2020-12-22 07:12:49,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:49,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:49,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:49,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:49,988 INFO L87 Difference]: Start difference. First operand 81673 states and 109341 transitions. Second operand 5 states. [2020-12-22 07:13:08,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:13:08,391 INFO L93 Difference]: Finished difference Result 216773 states and 292304 transitions. [2020-12-22 07:13:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:13:08,391 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:13:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:13:08,764 INFO L225 Difference]: With dead ends: 216773 [2020-12-22 07:13:08,764 INFO L226 Difference]: Without dead ends: 135213 [2020-12-22 07:13:08,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:13:08,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135213 states. [2020-12-22 07:13:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135213 to 82777. [2020-12-22 07:13:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82777 states. [2020-12-22 07:13:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82777 states to 82777 states and 110108 transitions. [2020-12-22 07:13:21,059 INFO L78 Accepts]: Start accepts. Automaton has 82777 states and 110108 transitions. Word has length 243 [2020-12-22 07:13:21,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:13:21,059 INFO L481 AbstractCegarLoop]: Abstraction has 82777 states and 110108 transitions. [2020-12-22 07:13:21,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:13:21,060 INFO L276 IsEmpty]: Start isEmpty. Operand 82777 states and 110108 transitions. [2020-12-22 07:13:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:13:21,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:13:21,084 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:13:21,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-12-22 07:13:21,084 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:13:21,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:13:21,085 INFO L82 PathProgramCache]: Analyzing trace with hash 536411310, now seen corresponding path program 1 times [2020-12-22 07:13:21,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:13:21,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609587761] [2020-12-22 07:13:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:13:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:13:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:13:21,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609587761] [2020-12-22 07:13:21,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:13:21,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:13:21,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509545041] [2020-12-22 07:13:21,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:13:21,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:13:21,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:13:21,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:13:21,177 INFO L87 Difference]: Start difference. First operand 82777 states and 110108 transitions. Second operand 5 states. [2020-12-22 07:13:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:13:46,882 INFO L93 Difference]: Finished difference Result 264735 states and 355653 transitions. [2020-12-22 07:13:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:13:46,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-12-22 07:13:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:13:47,320 INFO L225 Difference]: With dead ends: 264735 [2020-12-22 07:13:47,321 INFO L226 Difference]: Without dead ends: 182078 [2020-12-22 07:13:47,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:13:47,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182078 states. [2020-12-22 07:14:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182078 to 84892. [2020-12-22 07:14:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84892 states. [2020-12-22 07:14:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84892 states to 84892 states and 112223 transitions. [2020-12-22 07:14:01,211 INFO L78 Accepts]: Start accepts. Automaton has 84892 states and 112223 transitions. Word has length 243 [2020-12-22 07:14:01,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:14:01,211 INFO L481 AbstractCegarLoop]: Abstraction has 84892 states and 112223 transitions. [2020-12-22 07:14:01,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:14:01,211 INFO L276 IsEmpty]: Start isEmpty. Operand 84892 states and 112223 transitions. [2020-12-22 07:14:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 07:14:01,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:14:01,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:14:01,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-12-22 07:14:01,241 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:14:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:14:01,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1251458512, now seen corresponding path program 1 times [2020-12-22 07:14:01,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:14:01,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932900524] [2020-12-22 07:14:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:14:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:14:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:14:01,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932900524] [2020-12-22 07:14:01,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:14:01,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:14:01,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913703465] [2020-12-22 07:14:01,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:14:01,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:14:01,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:14:01,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:14:01,366 INFO L87 Difference]: Start difference. First operand 84892 states and 112223 transitions. Second operand 4 states. [2020-12-22 07:14:31,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:14:31,450 INFO L93 Difference]: Finished difference Result 287180 states and 379122 transitions. [2020-12-22 07:14:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:14:31,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 243 [2020-12-22 07:14:31,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:14:32,012 INFO L225 Difference]: With dead ends: 287180 [2020-12-22 07:14:32,013 INFO L226 Difference]: Without dead ends: 202413 [2020-12-22 07:14:32,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:14:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202413 states.