/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:24:04,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:24:04,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:24:04,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:24:04,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:24:04,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:24:04,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:24:04,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:24:04,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:24:04,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:24:04,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:24:04,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:24:04,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:24:04,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:24:04,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:24:04,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:24:04,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:24:04,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:24:04,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:24:04,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:24:04,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:24:04,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:24:04,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:24:04,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:24:04,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:24:04,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:24:04,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:24:04,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:24:04,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:24:04,991 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:24:04,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:24:04,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:24:04,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:24:04,993 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:24:04,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:24:04,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:24:04,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:24:04,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:24:04,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:24:04,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:24:04,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:24:04,995 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:24:04,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:24:04,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:24:04,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:24:04,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:24:04,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:24:04,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:24:04,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:24:04,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:24:04,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:24:04,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:24:04,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:24:04,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:24:04,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:24:05,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:24:05,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:24:05,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:24:05,408 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:24:05,409 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:24:05,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:24:05,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a9650fd/52d5080621934b16bffd765ff434183d/FLAG36fedbe24 [2020-12-22 07:24:06,267 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:24:06,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:24:06,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a9650fd/52d5080621934b16bffd765ff434183d/FLAG36fedbe24 [2020-12-22 07:24:06,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a9650fd/52d5080621934b16bffd765ff434183d [2020-12-22 07:24:06,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:24:06,512 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:24:06,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:06,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:24:06,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:24:06,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:06" (1/1) ... [2020-12-22 07:24:06,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7833b5bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:06, skipping insertion in model container [2020-12-22 07:24:06,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:06" (1/1) ... [2020-12-22 07:24:06,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:24:06,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:24:07,177 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.UNBOUNDED.pals.c[52225,52238] [2020-12-22 07:24:07,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:07,203 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:24:07,321 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.UNBOUNDED.pals.c[52225,52238] [2020-12-22 07:24:07,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:07,356 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:24:07,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:07 WrapperNode [2020-12-22 07:24:07,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:07,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:07,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:24:07,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:24:07,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:07" (1/1) ... [2020-12-22 07:24:07,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:07" (1/1) ... [2020-12-22 07:24:07,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:07,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:24:07,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:24:07,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:24:07,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:07" (1/1) ... [2020-12-22 07:24:07,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:07" (1/1) ... [2020-12-22 07:24:07,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:07" (1/1) ... [2020-12-22 07:24:07,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:07" (1/1) ... [2020-12-22 07:24:07,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:07" (1/1) ... [2020-12-22 07:24:07,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:07" (1/1) ... [2020-12-22 07:24:07,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:07" (1/1) ... [2020-12-22 07:24:07,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:24:07,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:24:07,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:24:07,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:24:07,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:07" (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 07:24:07,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:24:07,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:24:07,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:24:07,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:24:10,562 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:24:10,562 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:24:10,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:10 BoogieIcfgContainer [2020-12-22 07:24:10,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:24:10,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:24:10,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:24:10,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:24:10,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:24:06" (1/3) ... [2020-12-22 07:24:10,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee6428c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:10, skipping insertion in model container [2020-12-22 07:24:10,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:07" (2/3) ... [2020-12-22 07:24:10,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee6428c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:10, skipping insertion in model container [2020-12-22 07:24:10,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:10" (3/3) ... [2020-12-22 07:24:10,575 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:24:10,581 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:24:10,586 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:24:10,605 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:24:10,639 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:24:10,639 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:24:10,639 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:24:10,639 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:24:10,640 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:24:10,640 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:24:10,640 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:24:10,640 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:24:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states. [2020-12-22 07:24:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:10,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:10,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:10,699 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:10,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:10,706 INFO L82 PathProgramCache]: Analyzing trace with hash 703858837, now seen corresponding path program 1 times [2020-12-22 07:24:10,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:10,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181496859] [2020-12-22 07:24:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:11,366 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 07:24:11,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181496859] [2020-12-22 07:24:11,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:11,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:24:11,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805491167] [2020-12-22 07:24:11,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:24:11,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:11,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:24:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:24:11,398 INFO L87 Difference]: Start difference. First operand 695 states. Second operand 2 states. [2020-12-22 07:24:11,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:11,489 INFO L93 Difference]: Finished difference Result 861 states and 1565 transitions. [2020-12-22 07:24:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:24:11,494 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 153 [2020-12-22 07:24:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:11,519 INFO L225 Difference]: With dead ends: 861 [2020-12-22 07:24:11,519 INFO L226 Difference]: Without dead ends: 691 [2020-12-22 07:24:11,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:24:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2020-12-22 07:24:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2020-12-22 07:24:11,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-12-22 07:24:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1270 transitions. [2020-12-22 07:24:11,636 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1270 transitions. Word has length 153 [2020-12-22 07:24:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:11,638 INFO L481 AbstractCegarLoop]: Abstraction has 691 states and 1270 transitions. [2020-12-22 07:24:11,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:24:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1270 transitions. [2020-12-22 07:24:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:11,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:11,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:11,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:24:11,648 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:11,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:11,649 INFO L82 PathProgramCache]: Analyzing trace with hash 194385747, now seen corresponding path program 1 times [2020-12-22 07:24:11,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:11,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905863285] [2020-12-22 07:24:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:11,928 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 07:24:11,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905863285] [2020-12-22 07:24:11,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:11,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:24:11,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649086807] [2020-12-22 07:24:11,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:24:11,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:11,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:24:11,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:11,935 INFO L87 Difference]: Start difference. First operand 691 states and 1270 transitions. Second operand 5 states. [2020-12-22 07:24:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:12,245 INFO L93 Difference]: Finished difference Result 860 states and 1558 transitions. [2020-12-22 07:24:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:24:12,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-12-22 07:24:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:12,315 INFO L225 Difference]: With dead ends: 860 [2020-12-22 07:24:12,316 INFO L226 Difference]: Without dead ends: 691 [2020-12-22 07:24:12,320 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 07:24:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2020-12-22 07:24:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2020-12-22 07:24:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-12-22 07:24:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1230 transitions. [2020-12-22 07:24:12,380 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1230 transitions. Word has length 153 [2020-12-22 07:24:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:12,382 INFO L481 AbstractCegarLoop]: Abstraction has 691 states and 1230 transitions. [2020-12-22 07:24:12,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:24:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1230 transitions. [2020-12-22 07:24:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-22 07:24:12,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:12,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:12,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:24:12,390 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:12,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:12,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1935208052, now seen corresponding path program 1 times [2020-12-22 07:24:12,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:12,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21079386] [2020-12-22 07:24:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:12,729 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 07:24:12,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21079386] [2020-12-22 07:24:12,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:12,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:12,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145691455] [2020-12-22 07:24:12,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:12,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:12,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:12,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:12,739 INFO L87 Difference]: Start difference. First operand 691 states and 1230 transitions. Second operand 3 states. [2020-12-22 07:24:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:12,854 INFO L93 Difference]: Finished difference Result 1008 states and 1773 transitions. [2020-12-22 07:24:12,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:12,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2020-12-22 07:24:12,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:12,864 INFO L225 Difference]: With dead ends: 1008 [2020-12-22 07:24:12,864 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 07:24:12,868 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 07:24:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 07:24:12,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 840. [2020-12-22 07:24:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2020-12-22 07:24:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1481 transitions. [2020-12-22 07:24:12,911 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1481 transitions. Word has length 192 [2020-12-22 07:24:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:12,918 INFO L481 AbstractCegarLoop]: Abstraction has 840 states and 1481 transitions. [2020-12-22 07:24:12,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:12,919 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1481 transitions. [2020-12-22 07:24:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-22 07:24:12,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:12,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:12,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:24:12,924 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:12,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:12,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1135632720, now seen corresponding path program 1 times [2020-12-22 07:24:12,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:12,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030792011] [2020-12-22 07:24:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:13,215 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 07:24:13,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030792011] [2020-12-22 07:24:13,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:13,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:13,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840865873] [2020-12-22 07:24:13,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:13,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:13,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:13,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:13,219 INFO L87 Difference]: Start difference. First operand 840 states and 1481 transitions. Second operand 3 states. [2020-12-22 07:24:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:13,303 INFO L93 Difference]: Finished difference Result 1446 states and 2509 transitions. [2020-12-22 07:24:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:13,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2020-12-22 07:24:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:13,312 INFO L225 Difference]: With dead ends: 1446 [2020-12-22 07:24:13,312 INFO L226 Difference]: Without dead ends: 1132 [2020-12-22 07:24:13,315 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 07:24:13,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2020-12-22 07:24:13,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1128. [2020-12-22 07:24:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2020-12-22 07:24:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1967 transitions. [2020-12-22 07:24:13,359 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1967 transitions. Word has length 196 [2020-12-22 07:24:13,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:13,360 INFO L481 AbstractCegarLoop]: Abstraction has 1128 states and 1967 transitions. [2020-12-22 07:24:13,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1967 transitions. [2020-12-22 07:24:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-22 07:24:13,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:13,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:13,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:24:13,366 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:13,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1111199852, now seen corresponding path program 1 times [2020-12-22 07:24:13,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:13,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540226419] [2020-12-22 07:24:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:13,593 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 07:24:13,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540226419] [2020-12-22 07:24:13,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:13,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:13,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763632069] [2020-12-22 07:24:13,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:13,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:13,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:13,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:13,597 INFO L87 Difference]: Start difference. First operand 1128 states and 1967 transitions. Second operand 3 states. [2020-12-22 07:24:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:13,683 INFO L93 Difference]: Finished difference Result 2288 states and 3925 transitions. [2020-12-22 07:24:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:13,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 200 [2020-12-22 07:24:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:13,694 INFO L225 Difference]: With dead ends: 2288 [2020-12-22 07:24:13,694 INFO L226 Difference]: Without dead ends: 1686 [2020-12-22 07:24:13,696 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 07:24:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2020-12-22 07:24:13,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1680. [2020-12-22 07:24:13,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1680 states. [2020-12-22 07:24:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2891 transitions. [2020-12-22 07:24:13,755 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2891 transitions. Word has length 200 [2020-12-22 07:24:13,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:13,755 INFO L481 AbstractCegarLoop]: Abstraction has 1680 states and 2891 transitions. [2020-12-22 07:24:13,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2891 transitions. [2020-12-22 07:24:13,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-22 07:24:13,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:13,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:13,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:24:13,761 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:13,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:13,762 INFO L82 PathProgramCache]: Analyzing trace with hash -224298040, now seen corresponding path program 1 times [2020-12-22 07:24:13,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:13,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804735337] [2020-12-22 07:24:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:13,993 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 07:24:13,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804735337] [2020-12-22 07:24:13,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:13,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:13,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464337863] [2020-12-22 07:24:13,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:13,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:13,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:13,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:13,996 INFO L87 Difference]: Start difference. First operand 1680 states and 2891 transitions. Second operand 3 states. [2020-12-22 07:24:14,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:14,096 INFO L93 Difference]: Finished difference Result 3900 states and 6613 transitions. [2020-12-22 07:24:14,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:14,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 204 [2020-12-22 07:24:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:14,113 INFO L225 Difference]: With dead ends: 3900 [2020-12-22 07:24:14,113 INFO L226 Difference]: Without dead ends: 2746 [2020-12-22 07:24:14,116 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 07:24:14,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2020-12-22 07:24:14,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2736. [2020-12-22 07:24:14,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2736 states. [2020-12-22 07:24:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4643 transitions. [2020-12-22 07:24:14,249 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4643 transitions. Word has length 204 [2020-12-22 07:24:14,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:14,250 INFO L481 AbstractCegarLoop]: Abstraction has 2736 states and 4643 transitions. [2020-12-22 07:24:14,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:14,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4643 transitions. [2020-12-22 07:24:14,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-22 07:24:14,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:14,258 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:14,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:24:14,258 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:14,265 INFO L82 PathProgramCache]: Analyzing trace with hash -107404444, now seen corresponding path program 1 times [2020-12-22 07:24:14,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:14,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372781477] [2020-12-22 07:24:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:14,487 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 07:24:14,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372781477] [2020-12-22 07:24:14,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:14,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:14,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524639647] [2020-12-22 07:24:14,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:14,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:14,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:14,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:14,491 INFO L87 Difference]: Start difference. First operand 2736 states and 4643 transitions. Second operand 3 states. [2020-12-22 07:24:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:14,618 INFO L93 Difference]: Finished difference Result 6980 states and 11701 transitions. [2020-12-22 07:24:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:14,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2020-12-22 07:24:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:14,646 INFO L225 Difference]: With dead ends: 6980 [2020-12-22 07:24:14,646 INFO L226 Difference]: Without dead ends: 4770 [2020-12-22 07:24:14,655 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 07:24:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2020-12-22 07:24:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 4752. [2020-12-22 07:24:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4752 states. [2020-12-22 07:24:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4752 states to 4752 states and 7955 transitions. [2020-12-22 07:24:14,838 INFO L78 Accepts]: Start accepts. Automaton has 4752 states and 7955 transitions. Word has length 208 [2020-12-22 07:24:14,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:14,839 INFO L481 AbstractCegarLoop]: Abstraction has 4752 states and 7955 transitions. [2020-12-22 07:24:14,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:14,839 INFO L276 IsEmpty]: Start isEmpty. Operand 4752 states and 7955 transitions. [2020-12-22 07:24:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 07:24:14,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:14,845 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:14,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:24:14,846 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:14,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:14,846 INFO L82 PathProgramCache]: Analyzing trace with hash -588675264, now seen corresponding path program 1 times [2020-12-22 07:24:14,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:14,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156028816] [2020-12-22 07:24:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:15,180 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 07:24:15,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156028816] [2020-12-22 07:24:15,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:15,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:24:15,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341073855] [2020-12-22 07:24:15,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:24:15,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:15,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:24:15,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:24:15,184 INFO L87 Difference]: Start difference. First operand 4752 states and 7955 transitions. Second operand 7 states. [2020-12-22 07:24:16,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:16,120 INFO L93 Difference]: Finished difference Result 26546 states and 44444 transitions. [2020-12-22 07:24:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:24:16,121 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 212 [2020-12-22 07:24:16,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:16,224 INFO L225 Difference]: With dead ends: 26546 [2020-12-22 07:24:16,224 INFO L226 Difference]: Without dead ends: 22320 [2020-12-22 07:24:16,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:24:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22320 states. [2020-12-22 07:24:16,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22320 to 10924. [2020-12-22 07:24:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10924 states. [2020-12-22 07:24:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10924 states to 10924 states and 18258 transitions. [2020-12-22 07:24:16,829 INFO L78 Accepts]: Start accepts. Automaton has 10924 states and 18258 transitions. Word has length 212 [2020-12-22 07:24:16,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:16,829 INFO L481 AbstractCegarLoop]: Abstraction has 10924 states and 18258 transitions. [2020-12-22 07:24:16,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:24:16,830 INFO L276 IsEmpty]: Start isEmpty. Operand 10924 states and 18258 transitions. [2020-12-22 07:24:16,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-12-22 07:24:16,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:16,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:16,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:24:16,840 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:16,843 INFO L82 PathProgramCache]: Analyzing trace with hash 959523782, now seen corresponding path program 1 times [2020-12-22 07:24:16,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:16,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454264872] [2020-12-22 07:24:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:17,085 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 07:24:17,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454264872] [2020-12-22 07:24:17,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:17,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:17,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157475438] [2020-12-22 07:24:17,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:17,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:17,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:17,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:17,096 INFO L87 Difference]: Start difference. First operand 10924 states and 18258 transitions. Second operand 4 states. [2020-12-22 07:24:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:17,556 INFO L93 Difference]: Finished difference Result 25659 states and 42873 transitions. [2020-12-22 07:24:17,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:17,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 213 [2020-12-22 07:24:17,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:17,597 INFO L225 Difference]: With dead ends: 25659 [2020-12-22 07:24:17,598 INFO L226 Difference]: Without dead ends: 15261 [2020-12-22 07:24:17,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:17,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15261 states. [2020-12-22 07:24:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15261 to 15226. [2020-12-22 07:24:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15226 states. [2020-12-22 07:24:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15226 states to 15226 states and 25435 transitions. [2020-12-22 07:24:18,214 INFO L78 Accepts]: Start accepts. Automaton has 15226 states and 25435 transitions. Word has length 213 [2020-12-22 07:24:18,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:18,215 INFO L481 AbstractCegarLoop]: Abstraction has 15226 states and 25435 transitions. [2020-12-22 07:24:18,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 15226 states and 25435 transitions. [2020-12-22 07:24:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-22 07:24:18,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:18,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:18,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:24:18,229 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:18,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1878058295, now seen corresponding path program 1 times [2020-12-22 07:24:18,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:18,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149932482] [2020-12-22 07:24:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:18,430 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 07:24:18,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149932482] [2020-12-22 07:24:18,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:18,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:18,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488902349] [2020-12-22 07:24:18,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:18,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:18,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:18,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:18,434 INFO L87 Difference]: Start difference. First operand 15226 states and 25435 transitions. Second operand 4 states. [2020-12-22 07:24:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:19,198 INFO L93 Difference]: Finished difference Result 45264 states and 75686 transitions. [2020-12-22 07:24:19,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:19,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 214 [2020-12-22 07:24:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:19,291 INFO L225 Difference]: With dead ends: 45264 [2020-12-22 07:24:19,291 INFO L226 Difference]: Without dead ends: 30564 [2020-12-22 07:24:19,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:19,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30564 states. [2020-12-22 07:24:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30564 to 22659. [2020-12-22 07:24:20,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22659 states. [2020-12-22 07:24:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22659 states to 22659 states and 37807 transitions. [2020-12-22 07:24:20,425 INFO L78 Accepts]: Start accepts. Automaton has 22659 states and 37807 transitions. Word has length 214 [2020-12-22 07:24:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:20,426 INFO L481 AbstractCegarLoop]: Abstraction has 22659 states and 37807 transitions. [2020-12-22 07:24:20,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:20,426 INFO L276 IsEmpty]: Start isEmpty. Operand 22659 states and 37807 transitions. [2020-12-22 07:24:20,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-22 07:24:20,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:20,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:20,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:24:20,441 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:20,442 INFO L82 PathProgramCache]: Analyzing trace with hash 674780591, now seen corresponding path program 1 times [2020-12-22 07:24:20,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:20,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678341641] [2020-12-22 07:24:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:20,744 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 07:24:20,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678341641] [2020-12-22 07:24:20,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:20,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:20,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532733139] [2020-12-22 07:24:20,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:20,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:20,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:20,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:20,749 INFO L87 Difference]: Start difference. First operand 22659 states and 37807 transitions. Second operand 3 states. [2020-12-22 07:24:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:21,661 INFO L93 Difference]: Finished difference Result 52284 states and 87449 transitions. [2020-12-22 07:24:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:21,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2020-12-22 07:24:21,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:21,751 INFO L225 Difference]: With dead ends: 52284 [2020-12-22 07:24:21,751 INFO L226 Difference]: Without dead ends: 35929 [2020-12-22 07:24:21,780 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 07:24:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35929 states. [2020-12-22 07:24:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35929 to 35927. [2020-12-22 07:24:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35927 states. [2020-12-22 07:24:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35927 states to 35927 states and 59831 transitions. [2020-12-22 07:24:22,943 INFO L78 Accepts]: Start accepts. Automaton has 35927 states and 59831 transitions. Word has length 215 [2020-12-22 07:24:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:22,944 INFO L481 AbstractCegarLoop]: Abstraction has 35927 states and 59831 transitions. [2020-12-22 07:24:22,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 35927 states and 59831 transitions. [2020-12-22 07:24:22,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-22 07:24:22,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:22,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:22,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:24:22,963 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:22,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1778051992, now seen corresponding path program 1 times [2020-12-22 07:24:22,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:22,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439499813] [2020-12-22 07:24:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:23,225 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 07:24:23,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439499813] [2020-12-22 07:24:23,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:23,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:23,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173582024] [2020-12-22 07:24:23,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:23,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:23,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:23,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:23,229 INFO L87 Difference]: Start difference. First operand 35927 states and 59831 transitions. Second operand 3 states. [2020-12-22 07:24:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:24,482 INFO L93 Difference]: Finished difference Result 79956 states and 133224 transitions. [2020-12-22 07:24:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:24,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2020-12-22 07:24:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:24,713 INFO L225 Difference]: With dead ends: 79956 [2020-12-22 07:24:24,713 INFO L226 Difference]: Without dead ends: 55470 [2020-12-22 07:24:24,741 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 07:24:24,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55470 states. [2020-12-22 07:24:26,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55470 to 55468. [2020-12-22 07:24:26,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55468 states. [2020-12-22 07:24:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55468 states to 55468 states and 92047 transitions. [2020-12-22 07:24:26,688 INFO L78 Accepts]: Start accepts. Automaton has 55468 states and 92047 transitions. Word has length 215 [2020-12-22 07:24:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:26,689 INFO L481 AbstractCegarLoop]: Abstraction has 55468 states and 92047 transitions. [2020-12-22 07:24:26,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 55468 states and 92047 transitions. [2020-12-22 07:24:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-22 07:24:26,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:26,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:26,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:24:26,695 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash -897585958, now seen corresponding path program 1 times [2020-12-22 07:24:26,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:26,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781902589] [2020-12-22 07:24:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:26,880 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 07:24:26,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781902589] [2020-12-22 07:24:26,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:26,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:26,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139047905] [2020-12-22 07:24:26,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:26,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:26,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:26,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:26,884 INFO L87 Difference]: Start difference. First operand 55468 states and 92047 transitions. Second operand 3 states. [2020-12-22 07:24:28,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:28,544 INFO L93 Difference]: Finished difference Result 108333 states and 180052 transitions. [2020-12-22 07:24:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:28,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2020-12-22 07:24:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:28,715 INFO L225 Difference]: With dead ends: 108333 [2020-12-22 07:24:28,715 INFO L226 Difference]: Without dead ends: 78684 [2020-12-22 07:24:28,766 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 07:24:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78684 states. [2020-12-22 07:24:30,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78684 to 78682. [2020-12-22 07:24:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78682 states. [2020-12-22 07:24:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78682 states to 78682 states and 130204 transitions. [2020-12-22 07:24:31,147 INFO L78 Accepts]: Start accepts. Automaton has 78682 states and 130204 transitions. Word has length 215 [2020-12-22 07:24:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:31,147 INFO L481 AbstractCegarLoop]: Abstraction has 78682 states and 130204 transitions. [2020-12-22 07:24:31,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:31,147 INFO L276 IsEmpty]: Start isEmpty. Operand 78682 states and 130204 transitions. [2020-12-22 07:24:31,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-22 07:24:31,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:31,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:31,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:24:31,153 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:31,154 INFO L82 PathProgramCache]: Analyzing trace with hash 456861469, now seen corresponding path program 1 times [2020-12-22 07:24:31,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:31,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129809484] [2020-12-22 07:24:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:31,344 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 07:24:31,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129809484] [2020-12-22 07:24:31,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:31,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:31,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053257750] [2020-12-22 07:24:31,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:31,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:31,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:31,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:31,347 INFO L87 Difference]: Start difference. First operand 78682 states and 130204 transitions. Second operand 4 states. [2020-12-22 07:24:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:34,355 INFO L93 Difference]: Finished difference Result 237337 states and 394072 transitions. [2020-12-22 07:24:34,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:34,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 215 [2020-12-22 07:24:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:34,733 INFO L225 Difference]: With dead ends: 237337 [2020-12-22 07:24:34,734 INFO L226 Difference]: Without dead ends: 159249 [2020-12-22 07:24:34,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:35,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159249 states. [2020-12-22 07:24:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159249 to 118620. [2020-12-22 07:24:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118620 states. [2020-12-22 07:24:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118620 states to 118620 states and 196181 transitions. [2020-12-22 07:24:38,650 INFO L78 Accepts]: Start accepts. Automaton has 118620 states and 196181 transitions. Word has length 215 [2020-12-22 07:24:38,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:38,651 INFO L481 AbstractCegarLoop]: Abstraction has 118620 states and 196181 transitions. [2020-12-22 07:24:38,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:38,651 INFO L276 IsEmpty]: Start isEmpty. Operand 118620 states and 196181 transitions. [2020-12-22 07:24:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-22 07:24:38,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:38,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:38,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:24:38,656 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:38,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:38,657 INFO L82 PathProgramCache]: Analyzing trace with hash 434112147, now seen corresponding path program 1 times [2020-12-22 07:24:38,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:38,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108688436] [2020-12-22 07:24:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:38,836 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 07:24:38,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108688436] [2020-12-22 07:24:38,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:38,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:38,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244333809] [2020-12-22 07:24:38,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:38,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:38,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:38,840 INFO L87 Difference]: Start difference. First operand 118620 states and 196181 transitions. Second operand 3 states. [2020-12-22 07:24:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:41,878 INFO L93 Difference]: Finished difference Result 231750 states and 384027 transitions. [2020-12-22 07:24:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:41,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2020-12-22 07:24:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:42,237 INFO L225 Difference]: With dead ends: 231750 [2020-12-22 07:24:42,237 INFO L226 Difference]: Without dead ends: 167925 [2020-12-22 07:24:42,338 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 07:24:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167925 states. [2020-12-22 07:24:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167925 to 167923. [2020-12-22 07:24:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167923 states. [2020-12-22 07:24:46,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167923 states to 167923 states and 276917 transitions. [2020-12-22 07:24:46,499 INFO L78 Accepts]: Start accepts. Automaton has 167923 states and 276917 transitions. Word has length 215 [2020-12-22 07:24:46,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:46,500 INFO L481 AbstractCegarLoop]: Abstraction has 167923 states and 276917 transitions. [2020-12-22 07:24:46,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:46,500 INFO L276 IsEmpty]: Start isEmpty. Operand 167923 states and 276917 transitions. [2020-12-22 07:24:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-22 07:24:46,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:46,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:46,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:24:46,503 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash 114596897, now seen corresponding path program 1 times [2020-12-22 07:24:46,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:46,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327836394] [2020-12-22 07:24:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:46,666 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 07:24:46,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327836394] [2020-12-22 07:24:46,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:46,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:46,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950146947] [2020-12-22 07:24:46,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:46,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:46,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:46,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:46,671 INFO L87 Difference]: Start difference. First operand 167923 states and 276917 transitions. Second operand 3 states. [2020-12-22 07:24:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:51,581 INFO L93 Difference]: Finished difference Result 371871 states and 613872 transitions. [2020-12-22 07:24:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:51,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2020-12-22 07:24:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:52,144 INFO L225 Difference]: With dead ends: 371871 [2020-12-22 07:24:52,144 INFO L226 Difference]: Without dead ends: 255713 [2020-12-22 07:24:52,249 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 07:24:52,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255713 states. [2020-12-22 07:24:58,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255713 to 255711. [2020-12-22 07:24:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255711 states. [2020-12-22 07:24:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255711 states to 255711 states and 419722 transitions. [2020-12-22 07:24:58,764 INFO L78 Accepts]: Start accepts. Automaton has 255711 states and 419722 transitions. Word has length 215 [2020-12-22 07:24:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:58,765 INFO L481 AbstractCegarLoop]: Abstraction has 255711 states and 419722 transitions. [2020-12-22 07:24:58,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:58,765 INFO L276 IsEmpty]: Start isEmpty. Operand 255711 states and 419722 transitions. [2020-12-22 07:24:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 07:24:58,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:58,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:58,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:24:58,768 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:58,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:58,768 INFO L82 PathProgramCache]: Analyzing trace with hash -481562834, now seen corresponding path program 1 times [2020-12-22 07:24:58,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:58,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369956100] [2020-12-22 07:24:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:59,424 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 07:24:59,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369956100] [2020-12-22 07:24:59,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:59,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:59,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619133727] [2020-12-22 07:24:59,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:59,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:59,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:59,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:59,427 INFO L87 Difference]: Start difference. First operand 255711 states and 419722 transitions. Second operand 4 states. [2020-12-22 07:25:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:09,389 INFO L93 Difference]: Finished difference Result 837732 states and 1377910 transitions. [2020-12-22 07:25:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:09,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 216 [2020-12-22 07:25:09,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:11,024 INFO L225 Difference]: With dead ends: 837732 [2020-12-22 07:25:11,024 INFO L226 Difference]: Without dead ends: 582613 [2020-12-22 07:25:11,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582613 states. [2020-12-22 07:25:24,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582613 to 418305. [2020-12-22 07:25:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418305 states. [2020-12-22 07:25:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418305 states to 418305 states and 685201 transitions. [2020-12-22 07:25:26,908 INFO L78 Accepts]: Start accepts. Automaton has 418305 states and 685201 transitions. Word has length 216 [2020-12-22 07:25:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:26,924 INFO L481 AbstractCegarLoop]: Abstraction has 418305 states and 685201 transitions. [2020-12-22 07:25:26,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 418305 states and 685201 transitions. [2020-12-22 07:25:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-22 07:25:26,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:26,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:26,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:25:26,945 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash 661059188, now seen corresponding path program 1 times [2020-12-22 07:25:26,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:26,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703657219] [2020-12-22 07:25:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:27,254 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 07:25:27,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703657219] [2020-12-22 07:25:27,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:27,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:27,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138758497] [2020-12-22 07:25:27,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:27,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:27,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:27,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:27,265 INFO L87 Difference]: Start difference. First operand 418305 states and 685201 transitions. Second operand 4 states. [2020-12-22 07:25:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:47,047 INFO L93 Difference]: Finished difference Result 1356076 states and 2225984 transitions. [2020-12-22 07:25:47,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:47,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 217 [2020-12-22 07:25:47,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:49,665 INFO L225 Difference]: With dead ends: 1356076 [2020-12-22 07:25:49,666 INFO L226 Difference]: Without dead ends: 938363 [2020-12-22 07:25:50,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938363 states. [2020-12-22 07:26:15,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938363 to 676967. [2020-12-22 07:26:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676967 states. [2020-12-22 07:26:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676967 states to 676967 states and 1106688 transitions. [2020-12-22 07:26:18,263 INFO L78 Accepts]: Start accepts. Automaton has 676967 states and 1106688 transitions. Word has length 217 [2020-12-22 07:26:18,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:18,264 INFO L481 AbstractCegarLoop]: Abstraction has 676967 states and 1106688 transitions. [2020-12-22 07:26:18,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:26:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 676967 states and 1106688 transitions. [2020-12-22 07:26:18,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-12-22 07:26:18,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:18,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:26:18,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:26:18,281 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:18,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:18,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1612943756, now seen corresponding path program 1 times [2020-12-22 07:26:18,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:18,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081959601] [2020-12-22 07:26:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:19,349 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 07:26:19,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081959601] [2020-12-22 07:26:19,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:19,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:26:19,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141321343] [2020-12-22 07:26:19,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:26:19,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:19,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:26:19,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:26:19,351 INFO L87 Difference]: Start difference. First operand 676967 states and 1106688 transitions. Second operand 7 states. [2020-12-22 07:26:39,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:39,349 INFO L93 Difference]: Finished difference Result 1353346 states and 2212334 transitions. [2020-12-22 07:26:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:26:39,349 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 219 [2020-12-22 07:26:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:40,986 INFO L225 Difference]: With dead ends: 1353346 [2020-12-22 07:26:40,986 INFO L226 Difference]: Without dead ends: 676971 [2020-12-22 07:26:41,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:26:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676971 states. [2020-12-22 07:26:59,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676971 to 676967. [2020-12-22 07:26:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676967 states. [2020-12-22 07:27:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676967 states to 676967 states and 1103563 transitions. [2020-12-22 07:27:02,064 INFO L78 Accepts]: Start accepts. Automaton has 676967 states and 1103563 transitions. Word has length 219 [2020-12-22 07:27:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:02,065 INFO L481 AbstractCegarLoop]: Abstraction has 676967 states and 1103563 transitions. [2020-12-22 07:27:02,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:27:02,065 INFO L276 IsEmpty]: Start isEmpty. Operand 676967 states and 1103563 transitions. [2020-12-22 07:27:02,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-22 07:27:02,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:02,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:27:02,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:27:02,079 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:02,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:02,093 INFO L82 PathProgramCache]: Analyzing trace with hash -388179343, now seen corresponding path program 1 times [2020-12-22 07:27:02,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:02,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192980364] [2020-12-22 07:27:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:02,972 WARN L197 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-22 07:27:03,132 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 07:27:03,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192980364] [2020-12-22 07:27:03,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:03,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:27:03,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755707232] [2020-12-22 07:27:03,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:27:03,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:03,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:27:03,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:27:03,135 INFO L87 Difference]: Start difference. First operand 676967 states and 1103563 transitions. Second operand 7 states.